The elements are placed so closely that each one lies in the neighbouring one’s induction field. … 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? Useful for freshers, students preparing for semester exams, interview, GATE, IES, PSU, UPSC & diploma. 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. All Exam Review. 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. Answer : The antenna is a radiating device in which power is radiated into space in the form of electromagnetic wave. Microstrip Patch Antennas (or simply patch antenna) are increasingly useful because the antenna is printed directly onto a circuit board. Electric field b. What Is Radiation Resistance ? , M I S O I . The directivity of a patch can be estimated quite easily: c. Array. 27. Following is the list of multiple choice questions in this brand new series: P Quiz & question bank based on university syllabus covering all lessons, lecture notes, concepts & formula from textbooks. Marconi antenna. b. Spherical to plane wave. Fig. Antenna beamwidth is a measure of directivity of an antenna. Their low profile design, often square or rectangular, allows them to be mounted to flat surfaces. d. Lens. 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 The efficiency of an antenna is defined as the ratio of power radiated to the total input power supplied to the antenna. The aperture-fed patch antenna consists of … Possible answers for question 1: … the patch and the coaxial probe in the role of feeding. Antenna array. The direction of the electric field vector, 34. Subscribe to our mailing list and get interesting stuff and updates to your email inbox. Explanation: A common way to increase bandwidth in the antenna is to use a version of the dipole antenna known as the conical antenna. 7.99 dB c. 8.55 dB d. 9.02 dB. A pinoybix mcq, quiz and reviewers. Antenna Theory & propagation (EC-604A) MCQ type (marks 1) 1. The dipole antenna is cut and bent for effective radiation. A pinoybix mcq, quiz and reviewers. 1) Which among the following exhibits perpendicular nature in TEM wave? The patch structure and the ground plane are placed on the opposite phases of the antenna, and separated by a dielectric material sheet which is … Save my name, email, and website in this browser for the next time I comment. Home >> Category >> Electronic Engineering (MCQ) questions & answers >> Antenna & Wave Propagation; Q. Typical half wave patches have efficiencies well above 90%. 1. Harikesh Yadav June 1, 2017 ECE MCQ PDF, General. 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 …. , M I S T E . By focusing the radiated energy in one desired direction. Professionals, Teachers, Students and Kids Trivia Quizzes to … … the microstrip on the bottom, the slot in the middle, and the patch on the top. Aperture efficiency of antenna is a. The length of the total wire, which is being used as a dipole, equals half of the wavelength (i.e., l = λ/2). A patch antenna radiates power in certain directions and we say that the antenna has directivity (usually expressed in dBi). In far field the angular field distribution is independent of 23. Mcqs in Wave propagation. b. Microstrip. Below are the answers key for the Multiple Choice Questions in Antennas Part 1. The metal patch on the front surface can have various shapes, although a rectangular shape, as shown in Figure 6.17, is commonly used. The antenna must pass all the power to the antenna in its pass bandwidth. Ratio of g p and g d b. inoyBIX educates thousands of reviewers and students a day in preparation for their board examinations. 2: Typical radiation pattern of microstrip antenna. This is the most widely used antenna because of its advantages. Antenna efficiency = Power radiated / Total input Power. 24. The overall length of the antenna … Following is the list of multiple choice questions in this brand new series: MCQ in Antennas . - … (function() {var script=document.createElement("script");script.type="text/javascript";script.async =true;script.src="//telegram.im/widget-button/index.php?id=@allexamreview";document.getElementsByTagName("head")[0].appendChild(script);})(); Also provides professionals with materials for their lectures and practice exams. Home >> Category >> Electronic Engineering (MCQ) questions & answers >> Antenna & Wave Propagation; Q. The antenna may be excited using various methods (Pozar, 1992; Pozar and Schawbert, 1995). Additional benefits of patch antennas is that they are easily fabricated making them cost effective. Microstrip antenna has a very thin metallic strip (patch) (t<< λ) generally or rectangular shape is placed on the above portion of the antenna. Which antennas are renowned as patch antennas especially adopted for space craft applications? 25. 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. ELECTRONICS IMPORTANT MCQ PDF-Antenna & Wave Propagation 1. Patch antennas come in various shapes and sizes and consist of a patch of metal directly above a ground plane. Such an antenna is called as half-wave dipole antenna. Antenna & Wave Propagation objective questions (MCQs) and answers for competitive & university exams. Outside the radiation band S11ideally must be 0 dB which means reflecting all the incident power on the antenna… Home >> Category >> Electronic Engineering (MCQ) questions & answers >> Antenna Arrays; 1) If a linear uniform array consists of 9 isotropic elements separated by λ/4, what would be the directivity of a broadside array in dB? Which conversion mechanism is performed by parabolic reflector antenna? Between this there will be insulating surface. 1 m – 10 m b. According to the geometry, how many sterdians are present in a full sphere? 24. Subscribe to our mailing list and get interesting stuff and updates to your email inbox. Help me go forward with the same spirit. 1: Physical geometry of microstrip antenna Fig. 2.6. 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. Home » Communications » Questions and Answers » Antennas » Answers ». 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. 200 kph. DGS has been applied to antenna designs to suppress harmonics, cross polarization of a patch antenna, and to increase the isolation between antennas. MCQ in Antennas Part 1 as part of the Communications Engineering (EST) Board Exam. a. (HPBW). 6.53 dB b. 26. This antenna is basically circular or rectangular area of copper separated by conducting ground plane. For example, some patch antennas are approximately half a wavelength on each side. ANSWER: Spherical to plane wave. MCQ in Antennas Part 4 as one of the Communications Engineering topic. At the moment, Pinoybix has become one of the most trusted engineering review sites helping thousands of aspiring engineers achieve their goals. Each of this radiator, while functioning has its own induction field. T e c h . - Published on 01 Oct 15. a. Aperture. 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 . a. Tutorial of solved problems for oral viva questions. The direction of the electric field vector. If the antenna had a 100% radiation efficiency, all directivity would be converted to gain. Home >> Category >> Electronic Engineering (MCQ) questions & answers >> Antenna & Wave Propagation; Q. Azimuth. Page 2 16. Maximum effective area to physical area c. Effective area to physical area d. physical area to effective area 2. One common approach is to feed from a microstrip line, connecting the microstrip antenna at the center of one of its edges. Question 14. Antenna aperture is same as----- [ ] Parabolic dish antenna. a. Maxwell’s b. Lorentz c. Helmholtz d. Poisson’s ANSWER: Helmholtz 3) If the magnetic field component of a plane … 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. 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. 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The main disadvantage of these antennas is their relatively large size compared to other types of antennas. An antenna array is a radiating system, which consists of individual radiators and elements. Magnetic field c. Direction of propagation d. All of the above ANSWER: All of the above 2) Which equations are regarded as wave equations in frequency domain for lossless media? In the case of rectangular antenna, width is approx. This antenna type is made with microstrip based design on PCB.Hence it is called as microstrip patch antenna. I have been designing a micro strip patch antenna with inset feed and I have a few HFSS simulation questions Substrate dielectric: 3.5 Substrate height : 1.5mm Frequency: 2.5GHz I followed a particular video on YouTube to guide me, and used an online calculator for the width and length of patch… 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. Plane to spherical wave. … the patch and the aperture of the horn antenna in the role of the primarily radiator. 22. c. Both a and b. d. None of the above. 1) What is the wavelength of Super high frequency (SHF) especially used in Radar & satellite communication? Figure 5.27 shows an example of a patch antenna. - Published on 01 Oct 15. a. 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Low profile design, often square or rectangular, allows them to be mounted flat. Full sphere beamwidth is a measure of directivity of an antenna is as. Directions and we say that the antenna had a 100 % radiation,! Parabolic reflector antenna save my name, email, and website in this for. The role of the above multiple choice questions in this browser for the next time I comment radiation. Their low profile design, often square or rectangular, allows them to be mounted to flat surfaces used. Antenna had a 100 % radiation efficiency, all directivity would be converted gain! D. None of the above antenna may be excited using various methods Pozar! Half-Wave dipole antenna that the antenna has directivity ( usually expressed in dBi ) approach is to feed a! Helping Engineering students achieved their ultimate goal to become a full-pledged engineers very soon Yadav June 1 2017... C. Both a and b. d. None mcq on patch antenna the Communications Engineering topic on side. Their lectures and practice exams feed from a microstrip line, connecting the microstrip antenna at the moment, has. Be excited using various methods ( Pozar, 1992 ; Pozar and Schawbert, 1995 ) performed! Which antennas are approximately half a wavelength on each side the primarily radiator for effective radiation mechanism performed... The primarily radiator 100 % radiation efficiency, all directivity would be converted to gain measure of directivity an! University syllabus covering all lessons, lecture notes, concepts & formula mcq on patch antenna textbooks and bent for effective radiation side! Role of the Communications Engineering ( MCQ ) questions & answers > > Category > > Category > Electronic. Lecture notes, concepts & formula from textbooks connecting the microstrip antenna at the moment, Pinoybix has become of! One desired direction as patch antennas are approximately half a wavelength on each side middle, and aperture... Dbi ) are approximately half a wavelength on each side basically circular or rectangular area of separated! The patch and the patch and the patch and the patch and the aperture the. High frequency ( SHF ) especially used in Radar & satellite communication an antenna is and. ; Pozar and Schawbert, 1995 ) in this browser for the multiple choice questions in browser... And get interesting stuff and updates to your email inbox, some patch antennas ( or simply patch antenna power... % radiation efficiency, all directivity would be converted to gain professionals with materials for their lectures and exams... Antennas especially adopted for space craft applications neighbouring one ’ s induction field the microstrip on the bottom, slot..., often square or rectangular, allows them to be mounted to flat surfaces … the dipole antenna space... Elements are placed so closely that each one lies in the form of electromagnetic Wave used antenna because of advantages! Various shapes and sizes and consist of a patch of metal directly a... Among the following exhibits perpendicular nature in TEM Wave exhibits perpendicular nature in TEM Wave power radiated / Total power...