ANTENNA and WAVE PROPAGATION Objective Questions and Answers :-1. Explain a. ii. 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. Normal mode of operation 2. Explain the different types of Diversity technique. ... GATE IES PSUs NET SET JRF UPSC And Other Entrance Exams''EC6602 AWP Important Questions ANTENNA AND WAVE 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. 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. Since radio transmission is Omni directionalin nature, the need to physically align the transmitter and receiver does not arise. Answer : Waves propagated over other paths near the earth surface is called ground wave propagation. wave velocity vp = c / ¥__- (fc / f)2 Group velocity, vp vg = c2 vg = c2 / vp. Waveguides. Study Material; Notes / Blog; Books List ; Register; MCQs On … 89. Loss aperture. i.e Aperture efficiency = hap = Ae / Ap (dimensionless). For any layer , the highest frequency that will be reflected back for vertical incidence is fcr = 9¥1max. Sky wave. The required field strength which in turn depends upon the radio noise at the receiving location and type of service involved . 43. 39.What is the need for the Binomial array.? UNIT VIII Wave Propagation – II: Antenna and wave propagation pdf; Sky Wave Propagation — Introduction. Antenna beam width is an angular width in degrees, measured on the radiation pattern (major lobe) between points where the radiated power has fallen to half its maximum value .This is called as “beam width” between half power points or half power beam width.(HPBW). Derive the expression for the radiated field from a short dipole. This year also our service continues for the Students. menu ExamSIDE Questions. The induction field will predominate at points close to the current element ,where the distance from the centre of the dipole to the particular point is less.This field is more effective in the vicinity of the current element only.It represents the energy stored in the magnetic field surrounding the current element or conductor.This field is also known as near field. A. Frequency diversity reception. ._Many satellites including weather satellites,data relay satellites all have helical antennas . Thus WA = WM+ Wm . We have also provided number of questions asked since 2007 and average weightage for each subject. Broad side array. It is the area of the antenna which dissipates power as heat. Plane earth reflection. 25. An antenna is an electrical conductor or system of conductors. Polarization diversity. The parameters to be considered for the design of an helical antenna are: 1. 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. You could not single-handedly going similar to book hoard or library or borrowing from your friends to approach them. The radiation resistance of a loop antenna can be increased by: 2. inserting a ferrite core of very high permeability with loop antenna’ s circumference which will rise the magnetic field intensity called ferrite loop. Frequency whose period is equal to the period of an electron in its orbit under the influence of the earths magnetic flux density B. 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. The wave length of an electromagnetic wave depends on its velocity. iii. An antenna is a system of similar antennas oriented similarly to get greater directivity in a desired direction. Q1. 1) What is the wavelength of Super high frequency (SHF) especially used in Radar & satellite communication? It is obtained by two ways. 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? 32. Radiation pattern is the relative distribution of radiated power as a function of distance in space .It is a graph which shows the variation in actual field strength of the EM wave at all points which are at equal distance from the antenna. 8.What is End Fire array? ii. Earth’ s magnetic field. Normally the electric field E is perpendicular to the direction of wave propagation. As this antenna and wave propagation question bank with answers pdf, it ends in the works instinctive one of the favored books antenna and wave propagation question bank with answers pdf collections that we have. (Ap). 2. What is meant by identical Point sources.? feint the happenings along the morning may create you setting thus bored. 1 cm – 10 cm c. 10 cm – 1 m d. 0.1 cm – 1 cm. The lowest useful HF for a given distance and transmitter power is defined as the lowest frequency that will give satisfactory reception for that distance and power. Answer : Waves that arrive at the receiver after reflection from the troposphere region is called Tropospheric wave (i.e. Syllabus AWP, Question papers, Answers, important Question ANTENNAS AND WAVE PROPAGATION R13 Regulation B.Tech JNTUK-kakinada Syllabus download. Beam efficiency = SM = WM / WA. Explain Ground wave Propagation. Which among the following Effective aperture(Ae). Space wave ii. 2. 1 cm – 10 cm C. 10 cm – 1 m D. 0.1 cm – 1 cm. It is the ratio of the reradiated power to the power density of the incident wave. They are Elliptical polarization ,circular polarization and linear polarization. \34. 1. 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? It is the waves originate at a fictitious volumeless emitter source at the center ‘O’ of the observation circle. Scattering aperture. (ie 10 Km from Earth surface). ._Isotropic source is not physically realizable but non-isotropic source is physically realizable. To minimize the fading and to avoid the multi path interference the technique used are diversity reception. 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. End fire array c. Collinear array. 1 m – 10 m B. D = 4p / WA. Antennenbuch von Rothhammel "karl rothammel, antennenbuch" - gebraucht und neu kaufen bei booklooker - jetzt bestellen Surface wave. Questions and Answers in Antennas Series. 85. Variation of signal strength occur on line of sight paths as a result of the atmospheric conditions and it is called .It can not be predicted properly. 9.Explain the principle of pattern multiplication with some examples. 37. 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. There is no time limit. Absorption character of ionosphere for the paths between transmitter and receiver. Structure of ionosphere, Refraction and Reflection of Sky Waves by ionosphere, Ray Path, Critical Frequency, MUF, LUF, OF, Virtual Hlght and Skip Distance. _Binomial Array:Tapering follows the coefficient of binomial series ._Dolph Tchebycheff Array: Tapering follows the coefficient of Tchebycheff polynomial. i.e FBR = Power radiated in desired direction / power radiated in the opposite direction. Eg. The power radiated from an antenna per unit solid angle is called the radiation intensity U (watts per steradian or per square degree). 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. (E Volts/m). The effective radiated power ii. Hey buddies, I am here sharing the PDF eBook and notes for Antenna & wave propagation (AWP) for Electronics Engineering students. Academia.edu no longer supports Internet Explorer. antenna and wave propagation solved problems pdf interview. Write short note on i) Vector potential ii) modification potential iii) Retarded Potential. A … You can view Result with Detail Solution of each question after completion of the test. What is the principle of the pattern multiplication? A. SONAR It can be a good friend, in reality fine pal once much knowledge. ii) With neat sketch explain the operation of Helical antenna. As known, to finish this book, you may not need to acquire it at subsequently in a day. _It is on many othe probes of planets and comets,including moon and mars,being used alone,in arrays or as feeds for parabolic reflectors,its circular polarization and high gain and simplicity making it effective for space application. 12. The total beam area ( WA) consists of the main beam area ( WM ) plus the minor lobe area ( Wm) . Near field zone (Fresnel zone) ii. List the arrays used for array tapering . Wave propagation is any of the ways in which waves travel. The expressions for magnetic vector potential (A) A = μ/401 J/r dV (volts /metre) 2) What is a monopole antenna? A isotropic radiator is a fictitious radiator and is defined as a radiator which radiates fields uniformly in all directions. 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. ECE board exam question and answer - EST #6 - antennas - Duration: 31:09. 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. 10.Explain the different techniques used for tapering of arrays. Explain in detail about ionosphere propagation. 3. 3. Derive the expression for radiation resistance of small loop antenna. ec6602 awp 2marks 16marks antenna and wave propagation. 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. Questions provided here are the Expected questions that are possible to be appeared in the upcoming … 22. ANTENNAS WAVE PROPAGATION UNIT WISE Important Questions Answers pdf free download ece lab viva manual mcqs objective interview questions syllabus Subscribe via Email, to get the latest articles [updates] from this site. It depends on i. The current having both magnitude and direction. However, their power … A. 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. Are your products and/ services do relate to this; then why you are waiting. ii) Specify the design consideration for a rhombic antenna. Overwhelming response to our books in various subjects inspired us to write this book. Analysis of GATE Papers . Structure of ionosphere, Refraction and Reflection of Sky Waves by ionosphere, Ray Path, Critical Frequency, MUF, LUF, OF, Virtual Hlght and Skip Distance. Explain in detail ionospheric propagation. Question 68. Define and explain for ionospheric region i) Critical frequency ii) MUF iii) Skip zone iv) virtual height of a layer. 4.Gives notes on the antenna impedances. Test Set - 1 - Antenna & Wave Propagation - This test comprises 35 questions. antenna and wave propagation two marks question and. It is also called as isotropic source or omni directional radiator or simply unipole. 21.Explain the concept of Reflection and refraction wavesby the ionosphere. Question 68. An antenna is a transducer that converts radio frequency electrical signal into electromagnetic wave of the same frequency. ELECTRONICS IMPORTANT MCQ PDF-Antenna & Wave Propagation 1. You can find GATE ECE subject wise and topic wise questions with answers 16. 86.What is meant by diversity reception.? 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, 55.Why a short dipole is called a oscillating dipole? _It is used as probes for field measurements and as directional antennas for radio wave navigation . Question 70. iv. Explain in detail about the aperture Concept, 3.Briefly explain the radiation from a short dipole. The antenna is a radiating device in which power is radiated into space in the form of electromagnetic wave. 28.What is meant by uniform linear array.? Far field zone (Fraunhofer zone). 1. The ratio of the effective aperture to the physical aperture is the aperture efficiency. 2. Similar point sources with equal maximum amplitudes are called identical point sources. 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. Antenna And Wave Propagation Question ANTENNA and WAVE PROPAGATION Objective Questions and Answers :-1. iii. A. SONAR The importance of Antenna and Wave Propagation is well known in various engineering fields. Bandwidth 2. GATE ECE Network Theory Control … MUF = fcr_VHF_ i. Having covered the process in class these past weeks you are now well capable of taking up the quiz below with ease. Antenna Wave & Propagation - Important Questions with Answers Give it a try and share your score. 88 .Define frequency diversity Reception. Since,the short electric dipole is so short,the current which is flowing through the dipole is assumed to be constant throughtout its length.The effect of this current is not felt instantaneous at a distance point only after an interval equal to the time required for the wave to propagate over the distance r is called the retardation time. Syllabus ,AWP, Question papers, Answers, important Question ANTENNAS AND WAVE PROPAGATION, R13 Regulation, B.Tech , JNTUK,Syllabus, download, ANTENNAS AND WAVE PROPAGATION Syllabus R13 Regulation ExamSIDE.Com. Dr.V.Thrimurthulu Lecture Notes Antenna & Wave Propagation CREC Dept. Year Percentage of Marks Overall Percentage 2015 8.70 8.862% 2014 8.25 2013 5.00 2012 12.00 2011 9.00 76.List the applications of helical antenna. The following chapters are covered in these notes & eBook of Antenna & Wave Propagation (AWP): Antenna … Electronics and Communication Engineering ECE FAQ Antennas and Wave Propagation Unit wise Two Marks, Short, Viva, Interviews Questions and Answers PDF. Sorry, preview is currently unavailable. Derive the maxima ,null directions and also the beamwidth of a Endfire array. 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. WA = ò ò4p Pn ( q,f ) dW ,Where dW = Sin q d q .df. 2) Which among the following is an application of high frequency? ii) Explain the term pattern multiplication. Derive the expression for radiation resistance of loop antenna with circumference equal to wavelength. A NOVEL ANALYSIS OF TERAHERTZ WAVEFORMS STRUCTURES WITH GaAlAs BASED ALLOY SUBSTRATE, IJSTE - International Journal of Science Technology and Engineering, Design of a High Directive Gain Reconfigurable Circular Patch Antenna, Design and Analysis of Rectangular Microstrip Patch Antenna Using Inset Feed Technique for Wireless Application. Tutorial of solved problems for oral viva questions. This is an example of a donut shaped or toroidal pattern. 23. EmoticonEmoticon. The velocity of an electromagnetic wave depends on the medium through which it propagates. Define Ground Wave? 16. Page 2 Subject: Antenna and Wave Propagation 4. 6.What are the different types of aperture.? 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. Question 70. Maxwell Equations. You can download the paper by clicking the button above. TQ, visit us again. 33.i) Write a short note on Traveling wave antenna. i. Question 69. 30. 42. 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. Miscellaneous. 24. Having covered the process in class these past weeks you are now well capable of taking up the quiz below with ease. Hence the potential in the case of magnetic field is magnetic vector potential. 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. 26. Ans: 1 cm – 10 cm. Solutions of GATE (EC) Questions of Antenna Array - YouTube The key features are − 1. 59.At what distance from the dipole is the induction field equal to the radiation field? Frequency of the signal. Axial mode of operation. 54.What is a Infinitesimal Dipole? Impedance 4. 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. 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. 38. PART 2: MCQ from Number 51 – 100 Answer key: PART 2. Free PDF download of jobs, exams and tests; E-books, materials, notes, previous solved papers, questions and answers with explanations, FAQ, MCQ, etc. Define Ground Wave? Antenna beamwidth is a measure of directivity of an antenna. Online reviewer PH 2,500 views. Antennas. When these modes re-emerge from the ionosphere they recombine into a single plane wave again. Derive the expression for radiation field and radiation resistance. ANTENNA and WAVE PROPAGATION Objective Questions and Answers :-1. 91. Due to the earth’ s magnetic fields, the ionosheric medium becomes an isotropic and the incident plane wave entering the ionosphere will split into ordinary and extra ordinary waves/modes. 6.Explain in detail the different cases of the array containing two isotropic sources. The applications of helical antenna are: . Yagi uda antenna. 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. Ideal for students preparing for semester exams, GATE, IES, PSUs, NET/SET/JRF, UPSC and other entrance exams. Ground wave classified into two types. Answer : Waves propagated over other paths near the earth surface is called ground wave propagation. Relation between and Skip Distance, Multi-hop Propagation. ANTENNA & WAVE PROPAGATION (2 marks question and answer) 1) What is magnetic vector potential? Antenna and Wave Propagation Online Test : Section 3. 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. Scattering aperture(As.) ._It is used as receiving antenna in portable radio and pagers . Define Tropospheric Wave? What are the type of fading.? Professionals, Teachers, Students and Kids Trivia Quizzes to … (AR). This set of Microwave Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Antenna Basics”. The ratio of the major to the minor axes of the polarization ellipse is called the Axial Ratio. _It is used to estimate the direction of radio wave propagation. Directivity from Pattern. Enter the email address you signed up with and we'll email you a reset link. 19. 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. This power variation as a function of the arrival angle is observed in the far field. State True or False with Reason 1. 10 Km from Earth surface). PART 4: MCQ from Number 151 – 200 Answer key: PART 4. The energy radiated in a particular direction by an antenna is measured in terms of FIELD STRENGTH. 1 m – 10 m B. EC6602 Antenna and Wave Propagation Important Questions May June 2019 EC6602 AWP ECE Important Expected Questions ECE 6th Semester May June 2019 . Get Free Antenna Wave Propagation Questions With Answers not isolated offers it is expediently scrap book resource. Write short notes on i) Ground wave propagation ii) space wave propagation. Antenna And Wave Propagation Questions With Answers Author: engineeringstudymaterial.net-2020-12-03T00:00:00+00:01 Subject: Antenna And Wave Propagation Questions With Answers Keywords: antenna, and, wave, propagation, questions, with, answers Created Date: 12/3/2020 6:03:17 AM Basics of Antennas, Dipole Antennas, Radiation Pattern, Antenna Gain. 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. Define Tropospheric Wave? 75.Which antenna will produce circularly polarized waves Helical antenna radiates circularly polarized wave. Question 69. 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 … ‘ O ’ of the antenna is an electrical conductor or system of antennas... ) virtual height of a complicated array without making lengthy computations Yadav June 1, 2017 ECE PDF. Potential relative to the direction of radiation is coincides with the array containing two isotropic sources deducted for wrong... Now is not physically realizable phenomenon is known as Faraday ’ s rotation. transmission is Omni nature! 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Are waiting radiates fields uniformly in all directions array containing two isotropic sources this Year also service! The principal direction of wave propagation – ii: antenna and wave propagation called identical point with! Fading and to avoid the multi path interference the technique used are diversity reception in its under... And mutual impedance of antenna:._No minor lobes Disadvantages:._Increased beam._Maintaining. Net/Set/Jrf, UPSC & diploma the plane of polarization will usually have,... Updates ] from this site direct wave and ground reflected wave of inspiring means for refractive index ionosphere. The Concept of reflection and refraction wavesby the ionosphere constant of earth along which it travels, General see. As probes for field measurements and as directional antennas for radio wave.... Following is the wavelength shaped or toroidal pattern based on university syllabus covering all lessons lecture. 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Minor lobes Disadvantages:._Increased beam width._Maintaining the large ratio of the that! Concept, 3.Briefly explain the operation of helical antenna your friends to approach them is well in. Through which it travels you a reset link radiated from a short dipole antenna may be as! Making lengthy computations ) consists of the characteristics of the array axis can view result with Solution. Attenuation of this wave is guided by a current element and its radiation resistance directly by. Potential relative to the direction of propagation in Dielectric Waveguide and Optical Fibers television! … the importance of antenna area ( WM ) a transducer between a guided wave and delivered the. Wavelength of Super high frequency ( SHF ) especially used in Radar & satellite?! Space waveor vice versa the wave length maximum specified for a binomial array. Sample paper Soln wave... The transmission weather satellites, data relay satellites all have helical antennas home ; GATE ECE subject and! = Ae / Ap ( dimensionless ) email address you signed up with and 'll. Planer surface like an antenna and wave propagation gate questions with answers or missile at a fictitious volumeless emitter source at the receiver after reflection the. Duration: 31:09 proprofs quiz the major to the physical size of the fact that of! Element from that other elements get by electro magnetic coupling application of high frequency ( SHF especially...

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