Anna University Regulation 2017 ECE EC8701 AME Syllabus for all 5 units are provided below.Download link for ECE 7th Sem EC8701 ANTENNAS AND MICROWAVE ENGINEERING Engineering Syllabus is listed down for students to make Perfect utilization and score maximum marks with our study materials. Rhombic antenna 3. None of these. The antenna must pass all the power to the antenna in its pass bandwidth. B Is less than that of dipole. (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. In the analysis of the 90° corner reflector there are 3 image elements, 2, 3 and 4, located shown in Fig 6.5. ______is not a microwave tube. A parabolic reflector antenna is commonly used for satellite communications, radio astronomy, and for various types of radio communication links. A. Square of the diameter of the reflector 3. A narrow, antenna-beam width in the vertical plane B. 2. The reflector antenna will be manufactured and tested at L3Harris facilities in Palm … ... 40.A form of unwanted radiation working against the main beam caused by feeding a parabolic reflector with an isotropic source. 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 . The figure depicts a plane reflector antenna type. C Is more than that of dipole. In addition, undesired interferences are reduced compared to using an omnidirectional antenna because the transmitted signal is directed toward its intended recipient. Outside the radiation band S11ideally must be 0 dB which means reflecting all the incident power on the antenna… 15. A. 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. Reflector: Used to reject signal outside its range as well as amplify what’s inside - think of a mirror reflecting light. 48. An antenna array is a radiating system, which consists of individual radiators and elements. Wave propagation. l. ASSEMBLY INSTRUCTIONS FOR MOSLEY CUBICAL QUAD MODEL MCQ- 3B The high performance of your MOSLEY Antenna … Microwave frequency range is----- [ ] a) above 30MHZ b) above 300MHZ C) above 200MHZ d) above 2000MHZ. When used in conjunction with a radar set, the purpose of an echo box is to provide an artificial target. i … The maximum range will be proportional to FM dipole antenna is used as an FM broadcasting-receiving antenna for the FM broadcast band 88 MHz to 108 MHz. B 1.5 km. Electrical Engineering MCQ - English . Aperture area of the feed 4. 14. The section contains questions on reflector antenna basics, flat sheet and corner reflector, parabolic reflector antenna, feeding systems, aperture blockage and parabolic reflector application. Bandwidth of the receiver Reflector antennas: (Fig. C 1.0 km. 11. Antenna beamwidth calculator. A discone antenna is a version of a biconical antenna in which one of the cones is replaced by a disc. Which may be used to … D o.5 km ... 28 The type of antenna to be used for producing circularly polarized beams is A helical antenna. MULTIPLE CHOICE QUESTIONS UNIT-4: VHF, UHF and MW ANTENNAS-I 1. This set of Microwave Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Antenna Family”. 49. Director(s): Used to provide the antenna with directional power and gain. A narrow, antenna-beam width in the horizontal plane C. A low repetition rate D. A high duty cycle. A. cathode_ray tube B. magnetron C. travelling_wave … Antenna reflectors can be a standalone device for redirecting FM energy or can be integrated as part of an antenna concentration. 13. Communication Systems MCQ question is the important chapter for a Electrical Engineering and GATE students. It is made of metal or screen mesh. Reflector Antennas. The calculation results are:. In a TV receiver antenna the length of reflector rod. Page-5 section-1 46. It is exactly this idea, which led to the invention of Antenna arrays. The driven antenna 1the 3 images have currents of equal magnitude. No such antenna exists in practice. D May be equal, more or less than that of dipole. Which antenna radiating region/s has/have independent nature of angular field distribution over the distance from the antenna? Parabolic Reflector Antenna. 47. This parabolic reflector antenna is used in conjunction with horn antenna as shown in the figure. 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. 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. 2. Dipole antenna 2. Line: The spine of the antenna used to hold the directors and reflectors and connect to the driven element. Which conversion mechanism is performed by parabolic reflector antenna? A direction antenna with two or more elements is known as a(n) a. folded dipole b. ground plane c. loop d. array. Last week, Yahsat chose Airbus to build Thuraya 4-NGS. An antenna array can be better understood by observing the following images. A. How does a parabolic reflector provide very high gain ? MCQ in Electronics - Wave Propagation and Antenna - Free download as PDF File (.pdf), Text File (.txt) or read online for free. 1. Anna University Regulation 2017 ECE Engineering (ECE) … Yagi-Uda antenna consists of----- [ ] a) Folded Dipole b) Reflector C) Director d) All above 3. 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 ? 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. The total side to side beamwidth of the antenna main beam. A Is the same as that of dipole. In a Yagi antenna, maximum direction of radiation is toward the a. director b. driven element c. reflector … 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. 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 What are parasitic elements and where are they used ? Verilog programs. – 1000+ Multiple Choice Questions & Answers in Antennas with explanations – Every MCQ set focuses on a specific topic in Antennas Subject. 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. D log-periodic array. Define spill over. 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. Home; Programs. 5) o parabolic reflectors, corner reflectors o These are high gain antennas usually used in radio astronomy, microwave An antenna reflector is a device that is reflected in electromagnetic waves. C pyramidal horn. 7. Microwave Engineering solved MCQs with an answer 1. 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. Yagi uda antenna 4. Some of the desired rays are not captured by the reflector antenna and this constitute spill over. The gain of parabolic reflector antenna is proportional to 1. Observe how the antenna arrays are connected. applied to analyze the corner reflector antenna for angle α = 180°/n, where n is any positive integer. 10. The horizontal radiation pattern o a vertical dipole is a. figure- b. circle c. Narrow beam d. clover leaf. of ECE P a g e | 6 mounted. 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. Shaped Reflector Antenna; 1.Horn Antenna. The noise figure of a receiver is a measure of: 1. 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. Flat-plate Reflector Antenna. Excess noise generated. 8. B paraboloid. 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 … If the addition of a reflector makes the same field strength available … The antenna gain helps reduce energy consumption when the node actively receives or transmit packets. What are the applications of Yagi – Uda antenna ? If the addition of a reflector makes the same field strength available with an input power of 11kW. The isotropic antenna is represented by 1. If the addition of a reflector makes the same field strength available with an input power of ... Antenna and Wave propagation mcq | Part-1 It is usually mounted vertically, with the disc at the top and the cone beneath. What is primary radiation and secondary radiation as applicable to parabolic reflector ? Most important and frequently asked multiple choice questions and answers on Antenna and wave propagation. 12. EC8701 AME Syllabus. 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