a. Maxwell’s b. Lorentz c. Helmholtz d. Poisson’s ANSWER: Helmholtz 3) If the magnetic field component of a plane … At the moment, Pinoybix has become one of the most trusted engineering review sites helping thousands of aspiring engineers achieve their goals. The direction of the electric field vector, 34. Outside the radiation band S11ideally must be 0 dB which means reflecting all the incident power on the antenna… Page 2 16. Answer : The antenna is a radiating device in which power is radiated into space in the form of electromagnetic wave. The overall length of the antenna … 1: Physical geometry of microstrip antenna Fig. Patch antennas come in various shapes and sizes and consist of a patch of metal directly above a ground plane. 7.99 dB c. 8.55 dB d. 9.02 dB. Aperture efficiency of antenna is a. 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. (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);})(); ANSWER: Spherical to plane wave. c. Both a and b. d. None of the above. This antenna type is made with microstrip based design on PCB.Hence it is called as microstrip patch antenna. In the case of rectangular antenna, width is approx. 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? Also provides professionals with materials for their lectures and practice exams. Such an antenna is called as half-wave dipole antenna. Below are the answers key for the Multiple Choice Questions in Antennas Part 1. Maximum effective area to physical area c. Effective area to physical area d. physical area to effective area 2. Antenna aperture is same as----- [ ] 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 …. 24. - Published on 01 Oct 15. a. Aperture. 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. The dipole antenna is cut and bent for effective radiation. 2: Typical radiation pattern of microstrip antenna. In far field the angular field distribution is independent of , M I S O I . … the patch and the aperture of the horn antenna in the role of the primarily radiator. MCQ in Antennas Part 4 as one of the Communications Engineering topic. 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? Between this there will be insulating surface. Microstrip antenna has a very thin metallic strip (patch) (t<< λ) generally or rectangular shape is placed on the above portion of the antenna. 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. Antenna efficiency = Power radiated / Total input Power. , M I S T E . Marconi antenna. 26. Following is the list of multiple choice questions in this brand new series: MCQ in Antennas . 1. Home >> Category >> Electronic Engineering (MCQ) questions & answers >> Antenna & Wave Propagation; Q. An antenna array is a radiating system, which consists of individual radiators and elements. d. Lens. 1) Which among the following exhibits perpendicular nature in TEM wave? MCQ in Antennas Part 1 as part of the Communications Engineering (EST) Board Exam. 25. - Published on 01 Oct 15. a. 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 Subscribe to our mailing list and get interesting stuff and updates to your email inbox. The main disadvantage of these antennas is their relatively large size compared to other types of antennas. What Is Radiation Resistance ? 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. Antenna Theory & propagation (EC-604A) MCQ type (marks 1) 1. 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. If the antenna had a 100% radiation efficiency, all directivity would be converted to gain. Ratio of g p and g d b. 22. One common approach is to feed from a microstrip line, connecting the microstrip antenna at the center of one of its edges. The metal patch on the front surface can have various shapes, although a rectangular shape, as shown in Figure 6.17, is commonly used. Antenna & Wave Propagation objective questions (MCQs) and answers for competitive & university exams. The elements are placed so closely that each one lies in the neighbouring one’s induction field. 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? Microstrip patch antenna consists of a radiating patch on one side of a dielectric substrate (FR4) that has a ground plane (Cu) on the other side as shown in Fig. We respect your privacy and take protecting it seriously, Click to share on Facebook (Opens in new window), Click to share on Telegram (Opens in new window), Click to share on WhatsApp (Opens in new window), Click to share on LinkedIn (Opens in new window), Click to share on Reddit (Opens in new window), Click to share on Tumblr (Opens in new window), Click to share on Pinterest (Opens in new window), Click to share on Pocket (Opens in new window), Click to share on Skype (Opens in new window), Madhya Pradesh Professional Examination Board (MPVYAPAM ) Recruitment 2017-Sub Engineer (Civil,Electrical,Mechanical,Electricals & Electronics) 1021 Post, ELECTRONICS IMPORTANT MCQ PDF-Antenna & Wave Propagation 2, QUIZ OF DAY-20/03/2017 GK & CURRENT AFFAIRS, GK(Important Historical Events) FOR RRVUNL AE & JE,UPPCL AE,DMRC/NMRC,SSC JE,BSPHCL JE, CE ONLINE TEST-STRUCTURAL ANALYSIS PART 2, Current Affairs (करंट अफेयर्स) -One Liner 26 To 29 March 2017, SSC JE & CIL GENERAL AWARENESS IMPORTANT QUESTION & ANSWERS (भारतीय अर्थव्यवस्था) 2, FINAL RESULT Engineering Services Examination, 2016, DMRC JE Electrical/JE Electronics Online Test Series 2020, PGCIL Diploma Trainee Electrical 2020 Online Test Series, ECIL GET ECE & EEE 8 Online Test Series And Study Material, COMMON STUDY MATRIAL FOR RVVUNL AE & JE,UPPCL AE,SSC JE,BSPHCL JE,DMRC/NMRC, ELECTRICAL ENGINEERING INTERVIEW QUESTIONS AND ANSWER, RAJASTHAN RAJYA VIDYUT UTPADAN NIGAM LTD (RRVUNL), TECH GURU CLASSES STUDY MATERIAL,PREVIOUS YEAR QUESTIONS PAPER AND SOLUTION FOR GATE,SSC JE,PSUs,NET ALL ENGINEERING BRANCH. a. … 6.53 dB b. Home » Communications » Questions and Answers » Antennas » Answers ». This antenna is basically circular or rectangular area of copper separated by conducting ground plane. Typical half wave patches have efficiencies well above 90%. The direction of the electric field vector. (HPBW). Azimuth. Professionals, Teachers, Students and Kids Trivia Quizzes to … Each of this radiator, while functioning has its own induction field. 1 m – 10 m b. Mcqs in Wave propagation. The length of the total wire, which is being used as a dipole, equals half of the wavelength (i.e., l = λ/2). The antenna may be excited using various methods (Pozar, 1992; Pozar and Schawbert, 1995). 27. ELECTRONICS IMPORTANT MCQ PDF-Antenna & Wave Propagation 1. Harikesh Yadav June 1, 2017 ECE MCQ PDF, General. Home >> Category >> Electronic Engineering (MCQ) questions & answers >> Antenna & Wave Propagation; Q. Figure 5.27 shows an example of a patch antenna. A patch antenna radiates power in certain directions and we say that the antenna has directivity (usually expressed in dBi). - … … the microstrip on the bottom, the slot in the middle, and the patch on the top. Help me go forward with the same spirit. 24. A pinoybix mcq, quiz and reviewers. The antenna must pass all the power to the antenna in its pass bandwidth. Electric field b. Fig. a. Antenna beamwidth is a measure of directivity of an antenna. By focusing the radiated energy in one desired direction. Antenna array. All Exam Review. Additional benefits of patch antennas is that they are easily fabricated making them cost effective. This is the most widely used antenna because of its advantages. a. 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 . 23. 1) What is the wavelength of Super high frequency (SHF) especially used in Radar & satellite communication? Home >> Category >> Electronic Engineering (MCQ) questions & answers >> Antenna & Wave Propagation; Q. Plane to spherical wave. Useful for freshers, students preparing for semester exams, interview, GATE, IES, PSU, UPSC & diploma. The directivity of a patch can be estimated quite easily: 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. 200 kph. Save my name, email, and website in this browser for the next time I comment. The aperture-fed patch antenna consists of … Possible answers for question 1: … the patch and the coaxial probe in the role of feeding. Their low profile design, often square or rectangular, allows them to be mounted to flat surfaces. 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. Explanation: A common way to increase bandwidth in the antenna is to use a version of the dipole antenna known as the conical antenna. 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. For example, some patch antennas are approximately half a wavelength on each side. DGS has been applied to antenna designs to suppress harmonics, cross polarization of a patch antenna, and to increase the isolation between antennas. The efficiency of an antenna is defined as the ratio of power radiated to the total input power supplied to the antenna. b. Microstrip. 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… c. Array. Following is the list of multiple choice questions in this brand new series: P 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 … According to the geometry, how many sterdians are present in a full sphere? T e c h . Which conversion mechanism is performed by parabolic reflector antenna? 2.6. Question 14. Tutorial of solved problems for oral viva questions. A pinoybix mcq, quiz and reviewers. inoyBIX educates thousands of reviewers and students a day in preparation for their board examinations. Which antennas are renowned as patch antennas especially adopted for space craft applications? Parabolic dish antenna. Microstrip Patch Antennas (or simply patch antenna) are increasingly useful because the antenna is printed directly onto a circuit board. b. Spherical to plane wave. 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