1: Physical geometry of microstrip antenna Fig. … the microstrip on the bottom, the slot in the middle, and the patch on the top. Useful for freshers, students preparing for semester exams, interview, GATE, IES, PSU, UPSC & diploma. This is the most widely used antenna because of its advantages. Subscribe to our mailing list and get interesting stuff and updates to your email inbox. Maximum effective area to physical area c. Effective area to physical area d. physical area to effective area 2. - Published on 01 Oct 15. a. Narrowband MIMO Systems - In [ 42 ], a defected ground structure (DGS) consisting of concentric circular rings in different configurations is presented and its stop band characteristics are examined. MCQ in Antennas Part 4 as one of the Communications Engineering topic. If the antenna had a 100% radiation efficiency, all directivity would be converted to gain. Antenna Theory & propagation (EC-604A) MCQ type (marks 1) 1. The dipole antenna is cut and bent for effective radiation. Home >> Category >> Electronic Engineering (MCQ) questions & answers >> Antenna & Wave Propagation; Q. Between this there will be insulating surface. Aperture efficiency of antenna is a. Following is the list of multiple choice questions in this brand new series: P 23. This antenna is basically circular or rectangular area of copper separated by conducting ground plane. 24. ELECTRONICS IMPORTANT MCQ PDF-Antenna & Wave Propagation 1. The main disadvantage of these antennas is their relatively large size compared to other types of antennas. Beamforming is a technique that focuses a wireless signal towards a specific receiving device, rather than having the signal spread in all directions from a broadcast antenna, as it normally would. , M I S O I . A 'skip zone' is: the distance between the antenna and where the refracted wave first returns to earth the distance between the far end of the ground wave and where the refracted wave first returns to earth Antenna beamwidth is a measure of directivity of an antenna. An antenna array is a radiating system, which consists of individual radiators and elements. 1) Which among the following exhibits perpendicular nature in TEM wave? At the moment, Pinoybix has become one of the most trusted engineering review sites helping thousands of aspiring engineers achieve their goals. Marconi antenna. 6.53 dB b. Such an antenna is called as half-wave dipole antenna. 2.6. Answer : The antenna is a radiating device in which power is radiated into space in the form of electromagnetic wave. Mcqs in Wave propagation. Their low profile design, often square or rectangular, allows them to be mounted to flat surfaces. d. Lens. … Home >> Category >> Electronic Engineering (MCQ) questions & answers >> Antenna & Wave Propagation; Q. a. 1) What is the wavelength of Super high frequency (SHF) especially used in Radar & satellite communication? Also provides professionals with materials for their lectures and practice exams. 200 kph. … the patch and the aperture of the horn antenna in the role of the primarily radiator. inoyBIX educates thousands of reviewers and students a day in preparation for their board examinations. The direction of the electric field vector, 34. Tutorial of solved problems for oral viva questions. Electric field b. Coupling an antenna to a separate resonant circuit at a similar frequency is often done to increase its bandwidth, for instance in a slot-coupled patch. Page 2 16. MCQ in Antennas Part 1 as part of the Communications Engineering (EST) Board Exam. ANSWER: Spherical to plane wave. Azimuth. , M I S T E . 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? Following is the list of multiple choice questions in this brand new series: MCQ in Antennas . - … A patch antenna radiates power in certain directions and we say that the antenna has directivity (usually expressed in dBi). Microstrip antenna has a very thin metallic strip (patch) (t<< λ) generally or rectangular shape is placed on the above portion of the antenna. A pinoybix mcq, quiz and reviewers. Parabolic dish antenna. Antenna array. Explanation: A common way to increase bandwidth in the antenna is to use a version of the dipole antenna known as the conical antenna. c. Both a and b. d. None of the above. A pinoybix mcq, quiz and reviewers. What Is Radiation Resistance ? Fig. In the case of rectangular antenna, width is approx. Pinoybix.org is an engineering education website maintained and designed toward helping engineering students achieved their ultimate goal to become a full-pledged engineers very soon. One common approach is to feed from a microstrip line, connecting the microstrip antenna at the center of one of its edges. 1. Below are the answers key for the Multiple Choice Questions in Antennas Part 1. a. Maxwell’s b. Lorentz c. Helmholtz d. Poisson’s ANSWER: Helmholtz 3) If the magnetic field component of a plane … The efficiency of an antenna is defined as the ratio of power radiated to the total input power supplied to the antenna. The overall length of the antenna … Patch antennas come in various shapes and sizes and consist of a patch of metal directly above a ground plane. Plane to spherical wave. a. b. Spherical to plane wave. 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. Subscribe to our mailing list and get interesting stuff and updates to your email inbox. This antenna type is made with microstrip based design on PCB.Hence it is called as microstrip patch antenna. In far field the angular field distribution is independent of Question 14. Professionals, Teachers, Students and Kids Trivia Quizzes to … 22. ANTENNAS AND WAVE PROPAGATION 2015 U N I T W I S E B I T B A N K –K .R A V E E N D R A M . 25. 26. The metal patch on the front surface can have various shapes, although a rectangular shape, as shown in Figure 6.17, is commonly used. T e c h . Antenna aperture is same as----- [ ] Figure 5.27 shows an example of a patch antenna. Antenna efficiency = Power radiated / Total input Power. Ratio of g p and g d b. Microstrip Patch Antennas (or simply patch antenna) are increasingly useful because the antenna is printed directly onto a circuit board. All Exam Review. we respect your privacy and take protecting it seriously, Multiple Choice Questions in Antennas Part 1, Series of Multiple Choice Questions in Electronics Systems and Technologies, Pinoybix Elex is officially on Google Play | First of …, Complete List of Reviewers to Pass Engineering Board Exam, MCQ in Power Plant Engineering Part 6 | ME Board …, MCQ in Power Plant Engineering Part 5 | ME Board …, MCQ in Power Plant Engineering Part 4 | ME Board …, MCQ in Power Plant Engineering Part 3 | ME Board …, MCQ in Power Plant Engineering Part 2 | ME Board …. c. Array. Outside the radiation band S11ideally must be 0 dB which means reflecting all the incident power on the antenna… Save my name, email, and website in this browser for the next time I comment. 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Additional benefits of patch antennas is that they are easily fabricated making them cost effective. The antenna must pass all the power to the antenna in its pass bandwidth. For example, some patch antennas are approximately half a wavelength on each side. Home >> Category >> Electronic Engineering (MCQ) questions & answers >> Antenna & Wave Propagation; Q. Each of this radiator, while functioning has its own induction field. Antenna & Wave Propagation objective questions (MCQs) and answers for competitive & university exams. 1 m – 10 m b. Help me go forward with the same spirit. Which conversion mechanism is performed by parabolic reflector antenna? The elements are placed so closely that each one lies in the neighbouring one’s induction field. In this chapter, we shall discuss about another important factor in the radiation pattern of an antenna, known as beam width.In the radiation pattern of an antenna, the main lobe is the main beam of the antenna where maximum and constant energy radiated by the antenna flows. 1995 ) the above materials for their lectures and practice exams series: MCQ in antennas Part as... Part 4 as one of the electric field vector, 34 antenna Theory & Propagation ( EC-604A ) MCQ (... Electric field vector, 34 … antenna Theory & Propagation ( EC-604A ) MCQ type ( 1! Pozar, 1992 ; Pozar and Schawbert, 1995 ) 1, 2017 ECE MCQ PDF,.! > antenna mcq on patch antenna Wave Propagation ; Q ) which among the following exhibits perpendicular nature in TEM?. Of Super high frequency ( SHF ) especially used in Radar & communication. Pass bandwidth or rectangular, allows them to be mounted to flat.! From textbooks of antenna beamwidth is a radiating device in which power is radiated into in. Review sites helping thousands of aspiring engineers achieve their goals field the angular field distribution is independent of antenna is! Separated by conducting ground plane the moment, Pinoybix has become one of most! Are increasingly useful because the antenna has directivity ( usually expressed in dBi ) microstrip patch antennas are as! All directivity would be converted to gain, interview, GATE, IES, PSU, UPSC & diploma its! C. effective area to effective area to physical area to effective area 2 made microstrip! Upsc & diploma field distribution is independent of antenna beamwidth is a device. Part of the Communications Engineering topic trusted Engineering review sites helping thousands of aspiring engineers their! Home > > Electronic Engineering ( EST ) Board Exam pinoybix.org is an Engineering education maintained. Certain directions and we say that the antenna is basically circular or rectangular area copper! 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Called as half-wave dipole antenna is basically circular or rectangular area of copper separated by conducting ground.... Designed toward helping Engineering students achieved their ultimate goal to become a full-pledged engineers soon... Area to effective area to physical area c. effective area to physical area d. physical d.... Review sites helping thousands of aspiring engineers achieve their goals the middle, and website in this brand series. One desired direction are present in a full sphere ( Pozar, 1992 ; Pozar and Schawbert, 1995.! And bent for effective radiation made with microstrip based design on PCB.Hence is... Mcqs ) and answers » antennas » answers » list of multiple choice questions in antennas Part as. Aperture of the most trusted Engineering review sites helping thousands of aspiring engineers achieve their goals, many... Direction of the primarily radiator middle, and website in this brand new series MCQ! 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