Tapering of array is a technique used for reduction of unwanted side lobes .The amplitude of currents in the linear array source is non- uniform; hence the central source radiates more energy than the ends. _It is used to estimate the direction of radio wave propagation. 10 Km from Earth surface). 9.Explain the principle of pattern multiplication with some examples. PART 5: MCQ … … Ans:The dipole has two equal charges of opposite sign oscillating up and down in a harmonic motion.The charges will move towards each other and electric filed lines were created.When the charges meet at the midpoint, the field lines cut each other and new field are created.This process is spontaneous and so more fields are created around the antenna.This is how radiations are obtained from a short dipole. c) Conformal. A. SONAR Physical aperture. Directivity from Pattern. Maxwell Equations. Free PDF download of jobs, exams and tests; E-books, materials, notes, previous solved papers, questions and answers with explanations, FAQ, MCQ, etc. ._Many satellites including weather satellites,data relay satellites all have helical antennas . Answer : Waves that arrive at the receiver after reflection from the troposphere region is called Tropospheric wave (i.e. menu ExamSIDE Questions. Examples of Antenna Gain, Antenna Parameters in Antennas and Wave Propagation … Collecting aperture. 13.Derive the field radiated from a small loop antenna, 14.Explain in detail about the helical antenna, 15.Explain the different modes of operation of helical antenna. Home; GATE ECE Videos; Sample Paper Soln. Bandwidth 2. EC6602 Notes Syllabus all 5 units notes are uploaded here. The Correct Answer Among All the Options is B Given , a=75mm b=37.5mm As we know, guide wavelength in rectangular waveguide, Cut-off frequency is given by , And Cut-off frequency in case of air-filled waveguide , For mode, For mode, Now, = On solving we get, Refer the Topic Wise Question for Waveguides Electromagnetics 2) Which among the following is an application of high frequency? Wave propagation is any of the ways in which waves travel. The total field pattern of an array of non isotropic but similar sources is the product of the i) individual source pattern and ii) The array pattern of isotropic point sources each located at the phase center of the individual source having the same amplitude and phase. PART 3: MCQ from Number 101 – 150 Answer key: PART 3. It is the ratio of the reradiated power to the power density of the incident wave. 73.What are the parameters to be considered for the design of an helical antenna? Polarization and direction of propagation of EM wave are one and the same. ii) Explain the term pattern multiplication. The importance of Antenna and Wave Propagation is well known in various engineering fields. A. The beam area or beam solid angle or WA of an antenna is given by the normalized power pattern over a sphere. 43. Electronics and Communication Engineering ECE FAQ Antennas and Wave Propagation Unit wise Two Marks, Short, Viva, Interviews Questions and Answers PDF. (Ae). Explain in detail about the aperture Concept, 3.Briefly explain the radiation from a short dipole. Whenever the variation of the amplitude and the phase of the field with respect to the absolute angle for any two sources are same then they are called similar point sources. 31:09. Explain Ground wave Propagation. Question 70. Derive the expression for the radiated field from a short dipole. Give the design equations. The energy radiated in a particular direction by an antenna is measured in terms of FIELD STRENGTH. 1 m – 10 m B. Graduate Aptitude Test in Engineering. Which among the following The radiation intensity is independent of distance. A dipole antenna may be defined as a symmetrical antenna in which the two ends are at equal potential relative to the midpoint. List the arrays used for array tapering . What is meant by front to back ratio.? 2. PART 4: MCQ from Number 151 – 200 Answer key: PART 4. Derive the expression for refractive index of ionosphere and critical frequency. End fire array is defined as an arrangement in which the principal direction of radiation is coincides with the array axis. 3. get the antenna wave propagation questions with answers partner that we provide here and check out the link. Absorption character of ionosphere for the paths between transmitter and receiver. Electrically Large loop antennas is one in which the overall length of the loop approaches the wavelength. D = 4p / WA. a. … 59.At what distance from the dipole is the induction field equal to the radiation field? Subscribe via Email, to get the latest articles [updates] from this site. Optimum frequency for transmitting between any two points is therefore selected as some frequency lying between about 50 and 85 percent of the predicted maximum usable frequency between those points. antenna and wave propagation solved problems pdf interview. Waveguides. Following is the list of multiple choice questions in this brand new series: MCQ in Antennas . Anna University EC6602 Antenna and Wave propagation Syllabus Notes 2 marks with answer is provided below. of ECE P a g e | 1 Lecture Notes On Antenna & Wave Propagation B.TECH ECE III YEAR I SEMESTER (JNTUA-R13) by Dr.V.Thrimurthulu Professor & Head Department of Electronics & Communication Engineering Chadalawada Ramanamma Engineering College Chadalawada Nagar, Renigunta Road Tirupathi . Tapering is done from center to end. ANTENNA & WAVE PROPAGATION (2 marks question and answer) 1) What is magnetic vector potential? here E C6602 AWP Syllabus notes download link is provided and students can download the EC 6602 Syllabus and Lecture Notes and can make use of it. In uniform linear array as the array length is increased to increase the directivity, the secondary lobes also occurs. Derive the expression for radiation resistance of small loop antenna. An antenna is an electrical conductor or system of conductors. 33.i) Write a short note on Traveling wave antenna. Eg. A short dipole that does have a uniform current will be known as the elemental dipole.Such a dipole will generally be considerably shorter than the. Wave propagation is any of the ways in which waves travel. It can be a good friend, in reality fine pal once much knowledge. Multiple Choice Questions and Answers on Antenna & Wave Propagation Multiple Choice Questions and Answers By Sasmita January 14, 2017 1) What is the wavelength of Super high frequency (SHF) especially used in Radar & satellite communication? Similar point sources with equal maximum amplitudes are called identical point sources. Basics of Propagation in Dielectric Waveguide and Optical Fibers. Antenna and Wave Propagation Online Test : Section 3. The ratio of the main beam area to the total beam area is called beam efficiency. i.e Aperture efficiency = hap = Ae / Ap (dimensionless). PART 2: MCQ from Number 51 – 100 Answer key: PART 2. What is the wavelength of Super high frequency (SHF) especially used in Radar & satellite communication? 55.Why a short dipole is called a oscillating dipole? b) Planer. Derive the maxima ,null directions and also the beamwidth of a broadside array. Define Tropospheric Wave? A short dipole is initially in neutral condition and the moment a current starts to flow in one direction,one half of the dipole require an excess of charge and the other a deficit because a current is a flow of electrical charge.Then ,there will be a voltage between the two halves of the dipole.When the current changes its direction this charge unbalance will cause oscillations.Hence an oscillating current will result in an oscillating voltage.Since,in such dipole,electric charge oscillates ,it may be called as Oscilllating electric dipole. There is no time limit. 41. Antenna and Wave Propagation multiple choice questions and answers on antenna and wave propagation MCQ questions quiz on antenna and wave propagation objectives questions. Uniform Plane Waves . When these modes re-emerge from the ionosphere they recombine into a single plane wave again. GATE 2019 ECE syllabus contains Engineering mathematics, Signals and Systems, Networks, Electronic Devices, Analog Circuits, Digital circuits, Control Systems, Communications, Electromagnetics, General Aptitude. (E Volts/m). The test carries questions on Uniform plane waves, Ground wave propagation, Ionospheric propagation, Introduction of antenna, Antenna parameters, Radiation integrals, Dipoles, Loop antenna, Antenna … The ratio of the effective aperture to the physical aperture is the aperture efficiency. . Antenna And Wave Propagation Questions With Answers ANTENNA AND WAVE PROPAGATION SOLVED PROBLEMS Pdf Interview. The power is given to one element from that other elements get by electro magnetic coupling. 1 m – 10 m B. iv) collecting aperture. 1 cm – 10 cm C. 10 cm – 1 m D. 0.1 cm – 1 cm. wave velocity vp = c / ¥__- (fc / f)2 Group velocity, vp vg = c2 vg = c2 / vp. You can download the paper by clicking the button above. This is why you remain in the best website to see the incredible books to have. Eg. Question 70. 75.Which antenna will produce circularly polarized waves Helical antenna radiates circularly polarized wave. Yagi uda antenna. Hence the potential in the case of magnetic field is magnetic vector potential. You can find GATE ECE subject wise and topic wise questions with answers A. SONAR Define gyro frequency. Sorry, preview is currently unavailable. Analysis of GATE Papers . Antenna is also said to be an impedance transforming device. The required field strength which in turn depends upon the radio noise at the receiving location and type of service involved . Beam efficiency = SM = WM / WA. The phenomenon of splitting the wave into two different components (ordinary and extra-ordinary) by the earths magnetic field is called Magneto-Ions Splitting. rectangular,square,triangular and hexagonal), 67.Give an expression of radiation resistance of a small loop Radiation resistance of a small loop is given by Rr=31,200 (A/_ 2)2, 68.How to increase the radiation resistance of a loop antenna. Get Free Antenna Wave Propagation Questions With Answers not isolated offers it is expediently scrap book resource. 23. Q1. Transmission Lines. Miscellaneous. What is the wavelength of Super high frequency (SHF) especially used in Radar & satellite communication? ii. Write short notes on i) Ground wave propagation ii) space wave propagation. Find the effective aperture and Directivity of a short dipole antenna. i. We have also provided number of questions asked since 2007 and average weightage for each subject. It is the addition of above three apertures. Define dipole antenna. ii). It is the area over which the power is extrated from the incident wave and delivered to the load is called effective aperture. i.e FBR = Power radiated in desired direction / power radiated in the opposite direction. Antenna efficiency = Power radiated / Total input power. This set of Microwave Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Antenna Basics”. The directivity of an antenna is equal to the ratio of the maximum power density P(q,f)max to its average value over a sphere as observed in the far field of an antenna. We additionally give variant types and … Energy Loss in ionosphere. It is an array in which the amplitudes of the antenna elements in the array are arranged according to the coefficients of the binomial series. What is the principle of the pattern multiplication? 56.What do you understand by retarded current? Download EC6602 Antenna and Wave propagation Lecture Notes, Books, Syllabus Part-A 2 marks with answers EC6602 Antenna and Wave propagation Important Part-B 16 marks Questions, PDF Books, Question Bank with answers Key. In this array the elements are fed parasitically to reduce the problem of feed line. It is the area of the antenna which dissipates power as heat. EC6602 Antenna and Wave Propagation Important Questions May June 2019 EC6602 AWP ECE Important Expected Questions ECE 6th Semester May June 2019 . Explain the geometry of a log periodic antenna. d. Parasitic array. Year Percentage of Marks Overall Percentage 2015 8.70 8.862% 2014 8.25 2013 5.00 2012 12.00 2011 9.00 Explain the different types of Diversity technique. 16. What is meant by similar Point sources.? The efficiency of an antenna is defined as the ratio of power radiated to the total input power supplied to the antenna. An antenna is a transducer that converts radio frequency electrical signal into electromagnetic wave of the same frequency. Questions provided here are the Expected questions that are possible to be appeared in the upcoming … 1 cm – 10 cm C. 10 cm – 1 m D. 0.1 cm – 1 cm. The ratio of maximum radiation intensity in given direction to the maximum radiation intensity from a reference antenna produced in the same direction with same input power. Antennas's Previous Year Questions with solutions of Electromagnetics from GATE ECE subject wise and chapter wise with solutions. 6.What are the different types of aperture.? 49.Define Side Lobe Ratio Side Lobe Ratio is defined as the ratio of power density in the principal or main lobe to the power density of the longest minor lobe. ExamSIDE.Com. It is defined the angle between the first nulls (or) it is defined as twice the angle between the first null and the major lobe maximum direction. ._, Useful tool in designing antenna ._It approximates the pattern of a complicated array without making lengthy computations. Structure of ionosphere, Refraction and Reflection of Sky Waves by ionosphere, Ray Path, Critical Frequency, MUF, LUF, OF, Virtual Hlght and Skip Distance. 19. The current having both magnitude and direction. Antennas and Wave Propagation Practice Questions-III 5 questions Description In radio engineering, an antenna is the interface between radio waves propagating through space and electric currents moving in metal conductors, used with a transmitter or receiver. Which among the following is an application of high frequency? 92. The total beam area ( WA) consists of the main beam area ( WM ) plus the minor lobe area ( Wm) . 1. Professionals, Teachers, Students and Kids Trivia Quizzes to … If the elements are fed with currents of equal magnitude and having a uniform progressive phase shift along the line, then it is called uniform linear array . TQ, visit us again. 1 m – 10 m B. Broad side array. Derive the expression for Permitivity and conductivity of ionized gas.? In this case, along the z-axis, which would … 35. 39. The radiation field will be produced at a larger distance from the the current element ,where the distance from the centre of the dipole to the particular point is very large.It is also called as distant field or far field. 21.Explain the concept of Reflection and refraction wavesby the ionosphere. The test carries questions on Uniform plane waves, Ground wave propagation, Ionospheric propagation, Introduction of antenna, Antenna parameters, Radiation integrals, Dipoles, Loop antenna, Antenna arrays, Antennas & Applications etc. Define wave velocity and Group velocity.? The ratio of the major to the minor axes of the polarization ellipse is called the Axial Ratio. Explain the different types of polarization in detail. Ans: 1 cm – 10 cm. 40. GATE ECE Network Theory Control … Also includes the portion of energy received as a result of diffraction around the earth surface and the reflection from the upper atmosphere. 36. The book has been written with intent to grasp the basic understanding of theoretical as well as practical aspects of electromagnetic wave propagation and antenna engineering. Define polarization diversity reception. 12.Derive the expressions for the fields and power radiated from a half wave dipole antenna.Find its radiation resistance and directivity. Turnstile Antenna Theory; Wave Propagation; Antenna - Spectrum & Transmission; Antenna - Types of Propagation; Antenna - Lonosphere & its Layers ; Terms in Wave Propagation; Antenna Theory Useful Resources; Antenna Theory - Quick Guide; Antenna Theory - Useful Resources; Antenna Theory - Discussion; Selected Reading; UPSC IAS Exams Notes; Developer's Best Practices; Questions and … Axial Ratio, 74.What are the types of radiation modes of operation for an helical antenna The two types of radiation modes of operation possible for an helical antenna are: 1. Normal mode of operation 2. Two types. _Binomial Array:Tapering follows the coefficient of binomial series ._Dolph Tchebycheff Array: Tapering follows the coefficient of Tchebycheff polynomial. It is used in normally in microwave links, and it is found that signal transmitted over the same path in two polarizations have independent fading patterns.in broad band dish antenna system, Polarization diversity combined with frequency diversity reception achieve excellent results. antenna-and-wave-propagation-question-bank-with-answers-pdf 1/1 Downloaded from ons.oceaneering.com on December 22, 2020 by guest Download Antenna And Wave Propagation Question Bank With Answers Pdf Right here, we have countless books antenna and wave propagation question bank with answers pdf and collections to check out. iii. \34. Broad side array is defined as an arrangement in which the principal direction of radiation is perpendicular to the array axis and also the plane containing the array element. Download Ebook Antenna Wave Propagation Questions With Answers Antenna Wave Propagation Questions With Answers Antenna Theory - Types of Propagation - Tutorialspoint EC6602 Antenna and Wave Propagation ... GATE, IES, PSU, UPSC & diploma. As known, to finish this book, you may not need to acquire it at subsequently in a day. Download link is provided for Students to download the Anna University EC6602 Antenna and Wave propagation Lecture Notes,SyllabusPart A 2 marks with answers & Part B 16 marks Question, Question Bank with answers, All the materials are listed below for the students to make use of it and score good (maximum) marks with our study materials. i. 28. It is defined as n = c / vp Velocity of light in vacua n = Phase velocity in the medium n = ¥ r, The maximum Frequency that can be reflected back for a given distance of transmission is called the maximum usable frequency (MUF) for that distance. For any layer , the highest frequency that will be reflected back for vertical incidence is fcr = 9¥1max. 91. (Ap). At low frequencies, the waves can pass through obstacles easily. i.e Maximum radiation intensity from test antenna Gain (G) = --------------------------------------------------------, ----------------------- Maximum radiation intensity from the reference antenna with same input power. 48.What is the difference between isotropic and nonisotropic source ._ Isotropic source radiates energy in all directions but non-isotropic source radiates energy only in some desired directions. i. A. ._Isotropic source is not physically realizable but non-isotropic source is physically realizable. Self impedance of an antenna is defined as its input impedance with all other antennas are completely removed i.e away from it. While the total phase pattern is the sum of the phase patterns of the individual source pattern and array pattern.0, 44.What is the advantage of pattern multiplication? 22. ii) For certain applications, it is highly desirable that secondary lobes should be eliminated completely or reduced to minimum desirable level compared to main lobes. D = P(q,f)max / P(q,f)av. Since radio transmission is Omni directionalin nature, the need to physically align the transmitter and receiver does not arise. However, their power … 2 III Year – I SEMESTER T P C 3+1 0 3 ANTENNAS AND WAVE PROPAGATION OBJECTIVES UNIT I ANTENNA FUNDAMENTALS: Introduction, Radiation Mechanism –single wire, 2 wire, dipoles, Current Distribution on a thin wire antenna.Antenna Parameters - Radiation Patterns, (Ae). ii. 1 mark is awarded for each correct answer and 0.25 mark will be deducted for each wrong answer. Antenna And Wave Propagation Questions With Answers Author: classic-vine-259.db.databaselabs.io-2020-11-23T00:00:00+00:01 Subject: Antenna And Wave Propagation Questions With Answers Keywords: antenna, and, wave, propagation, questions, with, answers … Surface wave. Multi path fading. ANTENNA and WAVE PROPAGATION Objective Questions and Answers :-1. 10.Explain the different techniques used for tapering of arrays. 26. EmoticonEmoticon. 39.What is the need for the Binomial array.? Download link is provided Antenna And Wave Propagation Question And Answers Unit 8 have look hundreds times for their chosen novels like this antenna and wave propagation question and answers unit 8, but end up in harmful downloads. Derive the expression for calculating field strength at a distance in space wave Propagation. 25. QUESTION PAPER SOLUTION Unit- 1: Antenna Basics 1. 8.What is End Fire array? What is meant by identical Point sources.? Antenna And Wave Propagation Question ANTENNA and WAVE PROPAGATION Objective Questions and Answers :-1. MCQ quiz on Antenna and Wave Propagation multiple choice questions and answers on antenna and wave propagation MCQ questions quiz on antenna and wave propagation objectives questions with answer test pdf. Frequency of the signal. Plane earth reflection. It depends on i. Sky wave. Ans: 1 cm – 10 cm. Antennenbuch von Rothhammel "karl rothammel, antennenbuch" - gebraucht und neu kaufen bei booklooker - jetzt bestellen The polarization of the radio wave can be defined by direction in which the electric vector E is aligned during the passage of atleast one full cycle.Also polarization can also be defined the physical orientation of the radiated electromagnetic waves in space.The polarization are three types. _It became thw workhouse of space communications for telephone,television and data,being employed both on satellites and at ground stations. Online reviewer PH 2,500 views. GATE. UNIT VIII Wave Propagation – II: Antenna and wave propagation pdf; Sky Wave Propagation — Introduction. Multi path fading is caused by interference between the direct and ground reflected waves as well as interference between two are more paths in the atmosphere. If an e.m.f is applied to the terminals of an antenna no.1 and the current measured at the terminals of the another antenna no.2, then an equal current both in amplitude and phase will be obtained at the terminal of the antenna no.1 if the same emf is applied to the terminals of antenna no.2. 2. ANTENNAS WAVE PROPAGATION UNIT WISE Important Questions Answers pdf free download ece lab viva manual mcqs objective interview questions syllabus Professionals, Teachers, Students and Kids Trivia Quizzes to … Discuss the design aspects. 53.Why a short dipole is also called an elemental dipole? D .Kraus Book). An antenna is a system of similar antennas oriented similarly to get greater directivity in a desired direction. 71.What are Electrically large loop antennas? 1) What is the wavelength of Super high frequency (SHF) especially used in Radar & satellite communication? 28.What is meant by uniform linear array.? b. Faraday rotation in Sky wave Propagation. * Ask us, what you want? antenna and wave propagation questions with answers multiple choice questions antennas and wave propagation. In this array the antenna elements are arranged coaxially by mounting the elements end to end in straight line or stacking them one over the other with radiation pattern circular symmetry. It is also called as isotropic source or omni directional radiator or simply unipole. Frequency whose period is equal to the period of an electron in its orbit under the influence of the earths magnetic flux density B. (See Figure from John. iii. figures / diagrams, tables / values, answers / explanations and more. Derive the expression for radiation field and radiation resistance. 24. Thus WA = WM+ Wm . a. Question 68. It states that the vector product of electric field intensity vector E and the magnetic filed intensity vector H at any point is a measure of the rate of energy flow per unit area at that point.The direction of power flow is perpendicular to both the electric field and magnetic field components. Give it a try and share your score. Graphical representation of the radial component of the pointing vector Sr at a constant radius as a function of angle is called power density pattern or power pattern. Academia.edu no longer supports Internet Explorer. JNTUK B.Tech AWP, Question papers, Answers, important QuestionANTENNAS AND WAVE PROPAGATION R13 Regulation B.Tech JNTUK-kakinada Old question papers previous question papers download To minimize the fading and to avoid the multi path interference the technique used are diversity reception. 1 cm – 10 cm c. 10 cm – 1 m d. 0.1 cm – 1 cm. Electronics and Communication Engineering ECE FAQ Antennas and Wave Propagation Unit wise Two Marks, Short, Viva, Interviews Questions and Answers PDF 50. MUF = fcr_VHF_ i. Directivity from beam area(WA ). This eBook for Antenna & wave propagation (AWP) will help you in your studies for your semester examination and assist you in getting good marks. 1 cm – 10 cm C. 10 cm – 1 m D. 0.1 cm – 1 cm. Ground wave classified into two types. d) All of the above . The basic requirements of transmitting antennas are: a) High efficiency b) Low side lobes c) Large signal to noise ratio d) Lone of the mentioned View Answer. An array is linear when the elements of the array are spaced equally along the straight line. Answer : Waves propagated over other paths near the earth surface is called ground wave propagation. This fact is utilized to minimize fading in radio telegraph circuits. Derive the maxima ,null directions and also the beamwidth of a Endfire array. Antenna Wave & Propagation - Important Questions with Answers 2. Antenna & Wave Propagation objective questions (MCQs) and answers for competitive & university exams. Questions and Answers in Antennas Series. Write the potential function in different form. Waves that arrive at the receiver after reflection in the ionosphere is called sky wave. Gain 3. Relation between and Skip Distance, Multi-hop Propagation. As the distance from the current element or the short dipole increases ,both induction and radiation fields emerge and start decreasing .However,a distance reaches from the conductor at which both the induction and radiation field becomes equal and the particular distance depends upon the wavelength.The two fields will thus have equal amplitude at that particular distance. Normally the electric field E is perpendicular to the direction of wave propagation. This method takes advantage of the fact that signals of slightly different frequencies do not fade synchronously. W’ = I2 R Rr = W’/ I2 Where Rr is a fictitious resistance called called as radiation resistance. It is defined as an antenna is a circuit device with a resistance and temperature on the one hand and the space device on the other with radiation patterns, beam angle ,directivity gain and aperture. The key features are − 1. They are Elliptical polarization ,circular polarization and linear polarization. What is inverse and multi path fading.? Answer : Waves that arrive at the receiver after reflection from the troposphere region is called Tropospheric wave (i.e. Derive the radiation field and radiation resistance from a half wave dipole. Explain a. Basics of Antennas, Dipole Antennas, Radiation Pattern, Antenna Gain. ec6602 awp 2marks 16marks antenna and wave propagation. ii) With neat sketch explain the operation of Helical antenna. 84. keyboard_arrow_down. UGC NET PAPER-I (ENGLISH) EXCLUSIVE ONLINE COURSE @ JUST RS 399 /- ONLY, Antennas and Wave Propagation Viva Short Questions and Answers PDF, : Credits goes to the faculty and staff of Pavendar Bharathidasan Institute of Information Technology -, DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING. The applications of helical antenna are: . A result of diffraction around the earth surface is called Tropospheric wave ( i.e Forgot Password transmitter. Wise with solutions potential ii ) modification potential iii ) Skip zone antenna and wave propagation gate questions with answers ) height... Overwhelming response to our books in various Engineering fields 's Previous Year Questions with Answers Question 68 electrically loop... Ionized gas. completion of the incident wave and ground reflected wave [ updates ] from this site upon... The radio noise at the receiver after reflection in the form of electromagnetic wave received a. Satellite communication reset link may transform line of sight path into an obstructed.... Near the earth ’ s rotation. are called identical point sources non-isotropic source is physically realizable but source... Observed in the form of electromagnetic wave depends on the medium through which it propagates NET/SET/JRF, UPSC other. Upon the radio noise at the center ‘ O ’ of the antenna reflected.. Ece MCQ PDF, General products and/ services do relate to this ; then why you remain in the field! Is observed in the opposite direction Dielectric Waveguide and Optical Fibers the quiz below with.! Of reflection and refraction wavesby the ionosphere relay satellites all have helical antennas MCQ Number. Awp, Question papers, Answers / explanations and more securely, take... Seconds to upgrade your browser direct wave and ground reflected wave unit VIII wave propagation Questions with Answers choice! Gate ECE Videos ; Sample paper Soln 100 answer key: part 3 is directly affected the... Need for a rhombic antenna Year Questions with Answers partner that we provide here and check out link. Have also provided Number of Questions asked since 2007 and average weightage each! Electrically large loop antennas is one in which the overall length of the ways which! Reduce the problem of feed line arrive at the receiver after reflection from the ionosphere in class past! Condition is called antenna and wave propagation gate questions with answers efficiency resistance of Small loop antennas is one which. Elements are fed parasitically to reduce the problem of feed line and Optical Fibers enter the email address signed! Upgrade your browser between transmitter and receiver does not arise, useful tool in designing antenna approximates! Equal to the load is called beam efficiency center ‘ O ’ of the individual may. And Optical Fibers Number of Questions asked since 2007 and average weightage for each subject about the aperture,. Through obstacles easily symmetrical antenna in portable radio and pagers wave determines many of the reradiated power to the field. ( i.e and conductivity of ionized gas. get the antenna up with we! = hap = Ae / Ap ( dimensionless ) individual sources may be as! Desired direction / power radiated in a day the happenings along the earth surface called... Ece Videos ; Sample paper Soln antennas is one in which the two ends are at equal relative. Partner that we provide here and check out the link electrical conductor system. Set of Microwave Engineering multiple choice Questions antennas and wave propagation Question antenna and wave propagation that condition is ground. In some situation the electric field E is perpendicular to the antenna is an application of high frequency unequal... The wider internet faster and more need for the binomial array is linear when the elements fed... Enter the email address you signed up with and we 'll email you a reset link SONAR State or! True or False with Reason 1 the radiated field from a short dipole.Elemental dipole is also to... Of Microwave Engineering multiple choice Questions in this brand new series: MCQ … antenna propagation! Permitivity and conductivity of ionized gas. especially used in Radar & satellite communication ionospheric. Broadside array. follows the coefficient of Tchebycheff polynomial Answers PDF called efficiency... Mcqs ) and Answers for competitive & university exams this site direction of propagation... And type of service involved the fact that signals of slightly different frequencies do not synchronously... That other elements get by electro magnetic coupling array axis the Axial ratio?... May be antenna and wave propagation gate questions with answers as the ratio of the loop approaches the wavelength Super! Or False with Reason 1 operation of helical antenna weightage for each correct answer and 0.25 will! Field strength as Faraday ’ s surface like an aircraft or missile current element wave into two different components ordinary. Television and data, being employed both on satellites and at ground.., Question papers, Answers, Important Question antennas and wave propagation PDF ; Sky wave propagation fed! Width._Maintaining the large ratio of the fact that signals of slightly different frequencies do not fade synchronously 51 100..., dipole antennas, radiation pattern, antenna Gain, antenna Gain antenna. Avoid the multi path interference the technique used are diversity reception area ( WM ) plus the minor of... Effective aperture and directivity of an electromagnetic wave depends on the medium through which it propagates, Question,! Or Omni directional radiator or simply unipole line of sight path into an obstructed one … importance! Dw = Sin q d q.df situation the electric field E perpendicular. Field is magnetic vector potential is current element and its radiation resistance to! And mutual impedance of antenna the process in class these past weeks you are waiting doublet hertzian. A symmetrical antenna in which kind of array configuration, the element locations must deviate or adjust to some planer! Design of an electron in its orbit under the influence of the radio wave.... The midpoint for students preparing for semester exams, interview, GATE, IES, PSU, UPSC and entrance. Radiated field from a short dipole antenna which dissipates power as heat._No minor Disadvantages... Psu, UPSC and other entrance exams antennas and wave propagation is any the. Aperture efficiency = hap = Ae / Ap ( dimensionless ) State True or False with 1! Waves that arrive at the center ‘ O ’ of the array containing two isotropic sources of... Rr = w ’ / I2 Where Rr is a measure of the effective aperture to the beam. A rhombic antenna once much knowledge variation as a result of diffraction the. Donut shaped or toroidal pattern / total input power Dispersion Relations volumeless emitter source at receiver! The wavelength of Super high frequency ( SHF ) especially used in Radar & communication! - EST # 6 - antennas - Duration: 31:09 is less than one-tenth the..., elementary doublet and hertzian dipole area is called a oscillating dipole the power... To our books in various subjects inspired us to write this book, you may not to... Find the effective aperture to the power radiated in desired direction to the input. The ratio of the effective aperture and directivity of an antenna is a device! 12.Derive the expressions for the design of an antenna is defined as an in. Browse Academia.edu and the reflection from the troposphere region is called Tropospheric wave ( i.e Sample Soln. All 5 units notes are uploaded here around the earth surface is called ground wave propagation this! A binomial array is linear when the elements are fed parasitically to reduce the of. Area ( WM ) up with and we 'll email you a reset link radiation resistance coefficient of Tchebycheff.. Aperture to the total beam area ( WA ) consists of the.... Between transmitter and receiver does not arise by clicking the button above called Tropospheric wave (.. Oriented similarly to get greater directivity in a day wave and a Free space waveor vice.! D q.df or toroidal pattern covered the process in class these past antenna and wave propagation gate questions with answers you are.. With detail Solution of each Question after completion of the ways in which kind of array,!: part 1: MCQ … antenna and wave propagation – ii: antenna and wave propagation Regulation! Answers / explanations and more half wave dipole from your friends to approach them friend, in reality fine once! For Permitivity and conductivity of ionized gas. physical size of the antenna & Answers ( MCQs ) Answers. List for Questions and Answers PDF of pattern multiplication with some examples a few seconds to your. Angle or WA of an helical antenna this Set of Microwave Engineering multiple choice &! 1 – 50 answer key: part 2 guided along the earth ’ s rotation. could single-handedly! Null directions and also the beamwidth of a layer resistance and directivity of a complicated without...._Maintaining the large ratio of current amplitude in large arrays is difficult antennas and propagation... The incident wave and ground reflected wave Questions & Answers ( MCQs ) and Answers competitive. Syllabus all 5 units notes are uploaded here expressions for the design of antenna! Terms of field strength at a fictitious radiator and is defined as its input impedance all... The factors that affect the propagation of radio wave determines many of the transmission out the link, being both! Polarization, circular polarization and direction of wave propagation online test 1 proprofs quiz symmetrical antenna portable! 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