applied to analyze the corner reflector antenna for angle α = 180°/n, where n is any positive integer. Which antenna radiating region/s has/have independent nature of angular field distribution over the distance from the antenna? The horn antenna is an example of an aperture antenna that provides a smooth transition from a waveguide to a larger aperture that couples more effectively into space. No such antenna exists in practice. If the addition of a reflector makes the same field strength available with an input power of ... Antenna and Wave propagation mcq | Part-1 Antenna and Wave Propagation Pdf notes book starts with the topics covering Antenna Basics, Thin Linear Wire Antennas, Antenna … Enter the diameter of your parabolic dish in m (metres) and the operating frequency in GHz (Gigahertz) A typical VSAT is 1.2m diameter and transmits at 14 - 14.5 GHz. What is the reason for using Yagi antenna for TV broadcast reception ? This set of Microwave Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Antenna Family”. Aperture area of the feed 4. Line: The spine of the antenna used to hold the directors and reflectors and connect to the driven element. A parabolic reflector antenna is commonly used for satellite communications, radio astronomy, and for various types of radio communication links. Reflector: Used to reject signal outside its range as well as amplify what’s inside - think of a mirror reflecting light. In addition, undesired interferences are reduced compared to using an omnidirectional antenna because the transmitted signal is directed toward its intended recipient. of ECE P a g e | 6 mounted. 14. MCQ in Basic considerations ; A dipole antenna requires to be fed with 20 kW of power to produce a given signal strength to a particular distant point. Here you can download the free lecture Notes of Antenna and Wave Propagation Notes Pdf – AWP Notes pdf materials with multiple file links to download. Most important and frequently asked multiple choice questions and answers on Antenna and wave propagation. Which conversion mechanism is performed by parabolic reflector antenna? Verilog programs. For a transmit antenna with a radiation resistance of 72 ohms, an effective antenna resistance of 8 ohms, a directive gain of 20 and an input power of 100W, determine the antenna … 49. Wave propagation. If the addition of a reflector makes the same field strength available … 11. Communication Systems MCQ question is the important chapter for a Electrical Engineering and GATE students. What are parasitic elements and where are they used ? MCQ in Electronics - Wave Propagation and Antenna - Free download as PDF File (.pdf), Text File (.txt) or read online for free. 1. Yagi-Uda antenna consists of----- [ ] a) Folded Dipole b) Reflector C) Director d) All above 3. 48. The gain of parabolic reflector antenna is proportional to 1. Square of the diameter of the reflector 3. 11) The type of antenna to be used for producing circularly polarized beams is a) pyramidal horn b) log-periodic array c) paraboloid d) helical antenna 12) In LOS-line of sight propagation systems, to take account of normal refraction, an effective earth radius factor k is used whose value is a) 4/3 b) 4 c) ¾ ... Read more Microwave Engineering MCQ Questions Answers Electronics ECE 2. Reflector Antennas. 8. An antenna array can be better understood by observing the following images. ... Cassegrain feed is used with a parabolic reflector to (A) increase the gain of the system (B) increase the bandwidth of the system ... Computer Science multiple choice questions and answers. Rhombic antenna 3. Some of the desired rays are not captured by the reflector antenna and this constitute spill over. The diameter of the reflector 2. ______is not a microwave tube. The noise figure of a receiver is a measure of: 1. Antenna reflectors can be a standalone device for redirecting FM energy or can be integrated as part of an antenna concentration. ELECTRONICS 100 IMPORTANT MCQ, electronics mcq, electronics communication objective questions and answers, NTS, PTS, STS April 20, 2020 ELECTRONICS 100 IMPORTANT MCQ's (Part-1) 1. Airbus Defence and Space selected L3Harris Technologies to build a space reflector antenna for Thuraya 4-NGS, a next-generation satellite which will provide mobile telecommunication services throughout the Middle East, Africa, Europe, and Central Asia. A narrow, antenna-beam width in the vertical plane B. Bandwidth of the receiver (18) With a parabolic reflector cassegrain feed is used to (A) Increase the system beam width (B) Increase the system gain (C) Allow the feed to be placed at convenient point (D) Reduce the main reflector size ... (26) Consider a radar having the capture area of receiving antenna A. 13. Learn Electromagnetic Field Theory MCQ questions & answers are available for a Electrical Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. A Is the same as that of dipole. 15. l. ASSEMBLY INSTRUCTIONS FOR MOSLEY CUBICAL QUAD MODEL MCQ- 3B The high performance of your MOSLEY Antenna … An antenna reflector is a device that is reflected in electromagnetic waves. The calculation results are:. The total side to side beamwidth of the antenna main beam. 5) o parabolic reflectors, corner reflectors o These are high gain antennas usually used in radio astronomy, microwave 47. If the addition of a reflector makes the same field strength available with an input power of 11kW. Director(s): Used to provide the antenna with directional power and gain. Anna University Regulation 2017 ECE Engineering (ECE) … Dipole antenna 2. B Is less than that of dipole. Last week, Yahsat chose Airbus to build Thuraya 4-NGS. 10. 46. Microwave Engineering solved MCQs with an answer 1. The driven antenna 1the 3 images have currents of equal magnitude. A. cathode_ray tube B. magnetron C. travelling_wave … C 1.0 km. – 1000+ Multiple Choice Questions & Answers in Antennas with explanations – Every MCQ set focuses on a specific topic in Antennas Subject. Antenna beamwidth calculator. MULTIPLE CHOICE QUESTIONS UNIT-4: VHF, UHF and MW ANTENNAS-I 1. D May be equal, more or less than that of dipole. B 1.5 km. The phase of … When used in conjunction with a radar set, the purpose of an echo box is to provide an artificial target. The maximum range will be proportional to A. Reflector antennas: (Fig. Observe how the antenna arrays are connected. In this feed system, primary radiator is put at the opening of vertex of paraboloid reflector B. the secondary feed of the cssegrain system is a hyperboloid reflector whose focus F coincides with focus of the paraboiloid reflector . How does a parabolic reflector provide very high gain ? D o.5 km ... 28 The type of antenna to be used for producing circularly polarized beams is A helical antenna. None of these. What are the applications of Yagi – Uda antenna ? Excess noise generated. In a TV receiver antenna the length of reflector rod. ... 40.A form of unwanted radiation working against the main beam caused by feeding a parabolic reflector with an isotropic source. Microwave frequency range is----- [ ] a) above 30MHZ b) above 300MHZ C) above 200MHZ d) above 2000MHZ. Page-6 section-1 Learn Communication Systems MCQ questions & answers are available for a Electrical Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. The antenna must pass all the power to the antenna in its pass bandwidth. Parabolic Reflector Antenna. What is primary radiation and secondary radiation as applicable to parabolic reflector ? 2. FM dipole antenna is used as an FM broadcasting-receiving antenna for the FM broadcast band 88 MHz to 108 MHz. An antenna array is a radiating system, which consists of individual radiators and elements. 27. The figure depicts a plane reflector antenna type. C Is more than that of dipole. Define spill over. It is made of metal or screen mesh. A direction antenna with two or more elements is known as a(n) a. folded dipole b. ground plane c. loop d. array. A narrow, antenna-beam width in the horizontal plane C. A low repetition rate D. A high duty cycle. A discone antenna is a version of a biconical antenna in which one of the cones is replaced by a disc. 12. The reflector antenna will be manufactured and tested at L3Harris facilities in Palm … Yagi uda antenna 4. The horizontal radiation pattern o a vertical dipole is a. figure- b. circle c. Narrow beam d. clover leaf. 24 For a parabolic reflector of 5 meter diameter, the far field pattern measurement at 6 GHz should be carried out a distance of at least A 2.0 km. 7. The section contains questions on reflector antenna basics, flat sheet and corner reflector, parabolic reflector antenna, feeding systems, aperture blockage and parabolic reflector application. Flat-plate Reflector Antenna. Shaped Reflector Antenna; 1.Horn Antenna. Electrical Engineering MCQ - English . Plane to spherical wave B. Spherical to plane wave C. Both a and b D. None of the above Ans: Spherical to plane wave 47. In a Yagi antenna, maximum direction of radiation is toward the a. director b. driven element c. reflector … EC8701 AME Syllabus. A. Home; Programs. The isotropic antenna is represented by 1. Dr.V.Thrimurthulu Lecture Notes Antenna & Wave Propagation CREC Dept. i … Page-5 section-1 It is usually mounted vertically, with the disc at the top and the cone beneath. Assemble the remaining Radiator spreader, coE0r coded red, and the two Reflector spreaders, color code yellow, in the same manner described above and in Fig. B paraboloid. D log-periodic array. In the analysis of the 90° corner reflector there are 3 image elements, 2, 3 and 4, located shown in Fig 6.5. C pyramidal horn. It is exactly this idea, which led to the invention of Antenna arrays. Electromagnetic Field Theory MCQ question is the important chapter for a Electrical Engineering and GATE students. The antenna gain helps reduce energy consumption when the node actively receives or transmit packets. A. 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