Sorry, preview is currently unavailable. 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. Polarization diversity. The beam area or beam solid angle or WA of an antenna is given by the normalized power pattern over a sphere. Write short note on i) Vector potential ii) modification potential iii) Retarded Potential. You can download the paper by clicking the button above. Explain in detail ionospheric propagation. 16. 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. They are Elliptical polarization ,circular polarization and linear polarization. Transmission Lines. Antennenbuch von Rothhammel "karl rothammel, antennenbuch" - gebraucht und neu kaufen bei booklooker - jetzt bestellen 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. What is the wavelength of Super high frequency (SHF) especially used in Radar & satellite communication? D .Kraus Book). iii. Tapering is done from center to end. menu ExamSIDE Questions. 31.i) Explain the construction of Yagi antenna. End fire array c. Collinear array. 29.i)What is folded dipole antenna ? Overwhelming response to our books in various subjects inspired us to write this book. (Ae). Energy Loss in ionosphere. 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? A … Define polarization diversity reception. We additionally offer variant types and … 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. Axial mode of operation. ._Isotropic source is not physically realizable but non-isotropic source is physically realizable. 16. 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. Advantage: ._No minor lobes Disadvantages: ._Increased beam width ._Maintaining the large ratio of current amplitude in large arrays is difficult. GATE ECE Network Theory Control … 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. Explain in detail about the aperture Concept, 3.Briefly explain the radiation from a short dipole. Antenna is also said to be an impedance transforming device. 4. Test Set - 1 - Antenna & Wave Propagation - This test comprises 35 questions. A. Uniform Plane Waves . Subscribe via Email, to get the latest articles [updates] from this site. 40. 91. Derive the radiation field and radiation resistance from a half wave dipole. Define Tropospheric Wave? In uniform linear array as the array length is increased to increase the directivity, the secondary lobes also occurs. 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. Online reviewer PH 2,500 views. An array is linear when the elements of the array are spaced equally along the straight line. This fact is utilized to minimize fading in radio telegraph circuits. 1 cm – 10 cm c. 10 cm – 1 m d. 0.1 cm – 1 cm. You could not single-handedly going similar to book hoard or library or borrowing from your friends to approach them. Relation between and Skip Distance, Multi-hop Propagation. The antenna is a radiating device in which power is radiated into space in the form of electromagnetic wave. The distance with in which a signal of given frequency fails to be reflected back is the skip distance for that frequency.The higher the frequency the greater the skip distance. What is inverse and multi path fading.? Broad side array. The radiation intensity is independent of distance. What is the principle of the pattern multiplication? Find the effective aperture and Directivity of a short dipole antenna. _It became thw workhouse of space communications for telephone,television and data,being employed both on satellites and at ground stations. 28.What is meant by uniform linear array.? How wideband operation is possible with this antenna. Basics of Antennas, Dipole Antennas, Radiation Pattern, Antenna Gain. 70.What are Electrically Small loop antennas? (Ae). Waves that arrive at the receiver after reflection from the troposphere region is called Tropospheric wave. 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. GATE 2019 ECE syllabus contains Engineering mathematics, Signals and Systems, Networks, Electronic Devices, Analog Circuits, Digital circuits, Control Systems, Communications, Electromagnetics, General Aptitude. ii) Write a short note on Self and mutual impedance of antenna. Electrically Small loop antennas is one in which the overall length of the loop is less than one-tenth of the wavelength. Eg. Answer : Waves that arrive at the receiver after reflection from the troposphere region is called Tropospheric wave (i.e. It is obtained by two ways. Answer : Waves that arrive at the receiver after reflection from the troposphere region is called Tropospheric wave (i.e. antenna and wave propagation online test 1 proprofs quiz. 9.Explain the principle of pattern multiplication with some examples. Academia.edu no longer supports Internet Explorer. b. Faraday rotation in Sky wave Propagation. Best of Luck.. a. 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. Also includes the portion of energy received as a result of diffraction around the earth surface and the reflection from the upper atmosphere. What is meant by identical Point sources.? 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 . d. Parasitic array. 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. Directivity from Pattern. 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. Define gyro frequency. Explain in detail about ionosphere propagation. ec6602 awp 2marks 16marks antenna and wave propagation. Discuss the design aspects. The applications of helical antenna are: . Which among the following is an application of high frequency? Having covered the process in class these past weeks you are now well capable of taking up the quiz below with ease. 90. 2. Useful for freshers, students preparing for semester exams, interview, GATE, IES, PSU, UPSC & diploma. Surface wave. End fire array is defined as an arrangement in which the principal direction of radiation is coincides with the array axis. Antenna and Wave Propagation multiple choice questions and answers on antenna and wave propagation MCQ questions quiz on antenna and wave propagation objectives questions. Sky wave. 23. feint the happenings along the morning may create you setting thus bored. Multi path fading. 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. 10 Km from Earth surface). iv) collecting aperture. 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 … Waves that arrive at the receiver after reflection in the ionosphere is called sky wave. Questions and Answers in Antennas Series. 1 mark is awarded for each correct answer and 0.25 mark will be deducted for each wrong answer. 22. Antenna And Wave Propagation Questions With Answers Getting the books antenna and wave propagation questions with answers now is not type of inspiring means. 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. 54.What is a Infinitesimal Dipole? Frequency whose period is equal to the period of an electron in its orbit under the influence of the earths magnetic flux density B. A isotropic radiator is a fictitious radiator and is defined as a radiator which radiates fields uniformly in all directions. Polarization and direction of propagation of EM wave are one and the same. Acces PDF Antenna Wave Propagation Questions With Answers eBook Writing: This category includes topics like cookbooks, diet books, self-help, spirituality, and fiction. Derive the expression for radiation resistance of small loop antenna. 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. Derive the expression for radiation field and radiation resistance. 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 questions with answers multiple choice questions antennas and wave propagation. ._It is used as receiving antenna in portable radio and pagers . Answer: a Explanation: The basic requirements of a transmitting antenna are high gain and efficiency while requirements of receiving … Wave that is guided along the earth’ s surface like an EM wave is guided by a transmission is called surface wave. iii. Effective aperture(Ae). The presence of near by antenna no.2 induces a current in the antenna no.1 indicates that presence of antenna no.2 changes the impedance of the antenna no.1.This effect is called mutual coupling and results in mutual impedance. Question 70. Maxwell Equations. wave velocity vp = c / ¥__- (fc / f)2 Group velocity, vp vg = c2 vg = c2 / vp. a. 39.What is the need for the Binomial array.? 53.Why a short dipole is also called an elemental dipole? iii. Are your products and/ services do relate to this; then why you are waiting. . This eBook for Antenna & wave propagation (AWP) will help you in your studies for your semester examination and assist you in getting good marks. When these modes re-emerge from the ionosphere they recombine into a single plane wave again. Home; GATE ECE Videos; Sample Paper Soln. 38. iv. You can view Result with Detail Solution of each question after completion of the test. _It is used as probes for field measurements and as directional antennas for radio wave navigation . _It is used to estimate the direction of radio wave propagation. Which among the following is an application of high frequency? (E Volts/m). Normal mode of operation 2. The ratio of the effective aperture to the physical aperture is the aperture efficiency. 1 cm – 10 cm C. 10 cm – 1 m D. 0.1 cm – 1 cm. 100. D = 4p / WA. i. GATE. (ie 10 Km from Earth surface). i. Curvature of earth. 36. What are the factors that affect the propagation of radio waves.? 5.Define Polarization? 1 m – 10 m B. b) Planer. 73.What are the parameters to be considered for the design of an helical antenna? 47.What are the advantages of binomial array? The power radiated from an antenna per unit solid angle is called the radiation intensity U (watts per steradian or per square degree). 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. 52.How radiations are created from a short Dipole? 43. 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. ANTENNA and WAVE PROPAGATION Objective Questions and Answers :-1. antenna-and-wave-propagation-question-bank-with-answers-pdf 1/1 Downloaded from www.maxpo.notube.com on December 19, 2020 by guest [Books] Antenna And Wave Propagation Question Bank With Answers Pdf Right here, we have countless book antenna and wave propagation question bank with answers pdf and collections to check out. iii) Loss aperture. Derive the maxima ,null directions and also the beamwidth of a broadside array. Near field zone (Fresnel zone) ii. However, their power … 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. 32. 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. 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. 2. Far field zone (Fraunhofer zone). The wave length of an electromagnetic wave depends on its velocity. Q1. This power variation as a function of the arrival angle is observed in the far field. Antenna efficiency = Power radiated / Total input power. 42. The velocity of an electromagnetic wave depends on the medium through which it propagates. What is meant by reciprocity Theorem.? It is the waves originate at a fictitious volumeless emitter source at the center ‘O’ of the observation circle. As known, to finish this book, you may not need to acquire it at subsequently in a day. The required field strength which in turn depends upon the radio noise at the receiving location and type of service involved . 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? What is meant by Faraday’ s rotation.? ANSWER: 1 cm – 10 cm. 6.Explain in detail the different cases of the array containing two isotropic sources. Antenna And Wave Propagation Questions With Answers ANTENNA AND WAVE PROPAGATION SOLVED PROBLEMS Pdf Interview. The phenomenon of splitting the wave into two different components (ordinary and extra-ordinary) by the earths magnetic field is called Magneto-Ions Splitting. Collecting aperture. Ans: 1 cm – 10 cm. Question 68. Miscellaneous. 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 . PART 3: MCQ from Number 101 – 150 Answer key: PART 3. Yagi uda antenna. i.e Aperture efficiency = hap = Ae / Ap (dimensionless). Derive the expression for the radiated field from a short dipole. 17.Explain diversity reception.? It is the ratio of the reradiated power to the power density of the incident wave. A. Two types. 1) What is the wavelength of Super high frequency (SHF) especially used in Radar & satellite communication? Questions is taken from Previous Year Papers. In this case, along the z-axis, which would … Likewise, if you are looking for a basic overview of a resume from complete book, you may get it here in one touch. An antenna is an electrical conductor or system of conductors. 50. … Subject: Antenna and Wave Propagation 4. 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. 41. 21.Explain the concept of Reflection and refraction wavesby the ionosphere. 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. What is the wavelength of Super high frequency (SHF) especially used in Radar & satellite communication? Derive the expression for Permitivity and conductivity of ionized gas. Effect of the earth magnetic field. Give the design equations. Ground wave classified into two types. Derive the maxima ,null directions and also the beamwidth of a Endfire array. 39. b. 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. WA = ò ò4p Pn ( q,f ) dW ,Where dW = Sin q d q .df. 59.At what distance from the dipole is the induction field equal to the radiation field? Antenna arrays are used to increase the gain of the antenna.. Forgot Password? Antenna beamwidth is a measure of directivity of an antenna. 3. 2. Explain the geometry of a log periodic antenna. Since radio transmission is Omni directionalin nature, the need to physically align the transmitter and receiver does not arise. 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. Professionals, Teachers, Students and Kids Trivia Quizzes to … What is meant by front to back ratio.? When the length of the short dipole is vanishingly small,then such a dipole is called a infinitesimal dipole.If dl be the infinitesimally small length and I be the current,then Idl is called as the current element. Physical aperture. 37. Define and explain for ionospheric region i) Critical frequency ii) MUF iii) Skip zone iv) virtual height of a layer. The ratio of the major to the minor axes of the polarization ellipse is called the Axial Ratio. 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). 10.Explain the different techniques used for tapering of arrays. 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. Antenna And Wave Propagation Question ANTENNA and WAVE PROPAGATION Objective Questions and Answers :-1. Similar point sources with equal maximum amplitudes are called identical point sources. The maximum amplitudes of the individual sources may be unequal. The efficiency of an antenna is defined as the ratio of power radiated to the total input power supplied to the antenna. PART 5: MCQ … There is no time limit. ANTENNAS WAVE PROPAGATION UNIT WISE Important Questions Answers pdf free download ece lab viva manual mcqs objective interview questions syllabus An antenna is a system of similar antennas oriented similarly to get greater directivity in a desired direction. For Semester Exams Interview GATE IES PSU UPSC Amp Diploma''Antennas amp Propagation May 11th, 2018 - Antennas amp Propagation CS 6710 Spring 2010 Rajmohan Rajaraman Introduction An antenna is an electrical conductor or oHalf wave dipole antenna or Hertz antenna''Antennas And Wave Propagation WordPress Com April 30th, 2018 - Vi Preface Wave Propagation Including Ground Wave And … Structure of ionosphere, Refraction and Reﬂection of Sky Waves by ionosphere, Ray Path, Critical Frequency, MUF, LUF, OF, Virtual Hlght and Skip Distance. Professionals, Teachers, Students and Kids Trivia Quizzes to … Earth’ s magnetic field. 92. _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. Explain a. The expressions for magnetic vector potential (A) A = μ/401 J/r dV (volts /metre) 2) What is a monopole antenna? 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Answer : Waves propagated over other paths near the earth surface is called ground wave propagation. 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. An antenna is an electrical conductor or system of conductors. i.e Maximum radiation intensity from test antenna Gain (G) = --------------------------------------------------------, ----------------------- Maximum radiation intensity from the reference antenna with same input power. Answer : Waves propagated over other paths near the earth surface is called ground wave propagation. What is meant by similar Point sources.? 85. Waveguides. PART 2: MCQ from Number 51 – 100 Answer key: PART 2. (AR). (Ap). Waves propagated over other paths near the earth surface is called ground wave propagation. Relation between and Skip Distance, Multi-hop Propagation. Question 70. Derive the expression for radiation resistance of loop antenna with circumference equal to wavelength. In spherical co-ordinates, increases in anti-clockwise direction. Antennas's Previous Year Questions with solutions of Electromagnetics from GATE ECE subject wise and chapter wise with solutions. 75.Which antenna will produce circularly polarized waves Helical antenna radiates circularly polarized wave. Write short notes on i) Ground wave propagation ii) space wave propagation. 7. There is no Negative Marking. MUF = fcr_VHF_ i. In this array the elements are fed parasitically to reduce the problem of feed line. This set of Microwave Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Antenna Basics”. Explain Ground wave Propagation. The effective height h of an antenna is the parameter related to the aperture.It may be defined as the ratio of the induced voltage to the incident field.i.e H= V / E. The fields around an antenna may be divided into two principal regions. Part 4: List for questions and answers of Antenna & wave Propagation . Give it a try and share your score. d) All of the above . 6.What are the different types of aperture.? PART 4: MCQ from Number 151 – 200 Answer key: PART 4. D = P(q,f)max / P(q,f)av. 2. Absorption character of ionosphere for the paths between transmitter and receiver. 89. QUESTION PAPER SOLUTION Unit- 1: Antenna Basics 1. Electromagnetics. What are the type of fading.? 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. i. Finally the plane of polarization will usually have changed, this phenomenon is known as Faraday’ s rotation. Thus WA = WM+ Wm . Harikesh Yadav June 1, 2017 ECE MCQ PDF, General. You can find GATE ECE subject wise and topic wise questions with answers What is the wavelength of Super high frequency (SHF) especially used in Radar & satellite communication? Antennas's Previous Year Questions with solutions of Electromagnetics from GATE ECE subject wise and chapter wise with solutions. ii). The importance of Antenna and Wave Propagation is well known in various engineering fields. It can be a good friend, in reality fine pal once much knowledge. Impedance 4. Basics of Propagation in Dielectric Waveguide and Optical Fibers. Page 2 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. a. UNIT VIII Wave Propagation – II: Antenna and wave propagation pdf; Sky Wave Propagation — Introduction. Normally the electric field E is perpendicular to the direction of wave propagation. 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. University exams a dipole antenna may be defined as a function of the are... Brand new series: MCQ from Number 1 – 50 answer key: 1. Amplitude in large arrays is difficult ionospheric region i ) vector potential of a short dipole is called efficiency! This wave is directly affected by the normalized power pattern over a sphere wise two Marks, short Viva... Uniform linear array as the ratio of the antenna originate at a fictitious radiator and is defined as the of... Home ; GATE ECE Network Theory Control … test Set - 1 - antenna wave! Offer variant types and … Waveguides, Boundary Conditions, Cut-Off frequencies, the secondary lobes also.. Notes, concepts & formula from textbooks wave propagation height of a layer, 3.Briefly explain the operation of antenna. Simply unipole high frequency power to the physical aperture is a fictitious volumeless emitter source at receiver... Get the antenna wave propagation PDF ; Sky wave of directivity of an helical antenna explain radiation... 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