If the addition of a reflector makes the same field strength available with an input power of ... Antenna and Wave propagation mcq | Part-1 Excess noise generated. applied to analyze the corner reflector antenna for angle α = 180°/n, where n is any positive integer. 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. This set of Microwave Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Antenna Family”. i … D log-periodic array. No such antenna exists in practice. 48. MULTIPLE CHOICE QUESTIONS UNIT-4: VHF, UHF and MW ANTENNAS-I 1. FM dipole antenna is used as an FM broadcasting-receiving antenna for the FM broadcast band 88 MHz to 108 MHz. Shaped Reflector Antenna; 1.Horn Antenna. A direction antenna with two or more elements is known as a(n) a. folded dipole b. ground plane c. loop d. array. The phase of … Outside the radiation band S11ideally must be 0 dB which means reflecting all the incident power on the antenna… 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 . D o.5 km ... 28 The type of antenna to be used for producing circularly polarized beams is A helical antenna. If the addition of a reflector makes the same field strength available with an input power of 11kW. The section contains questions on reflector antenna basics, flat sheet and corner reflector, parabolic reflector antenna, feeding systems, aperture blockage and parabolic reflector application. An antenna array can be better understood by observing the following images. 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. – 1000+ Multiple Choice Questions & Answers in Antennas with explanations – Every MCQ set focuses on a specific topic in Antennas Subject. The gain of parabolic reflector antenna is proportional to 1. B Is less than that of dipole. The noise figure of a receiver is a measure of: 1. The figure depicts a plane reflector antenna type. 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 The calculation results are:. C 1.0 km. In the analysis of the 90° corner reflector there are 3 image elements, 2, 3 and 4, located shown in Fig 6.5. 10. The diameter of the reflector 2. Dr.V.Thrimurthulu Lecture Notes Antenna & Wave Propagation CREC Dept. Most important and frequently asked multiple choice questions and answers on Antenna and wave propagation. Dipole antenna 2. MCQ in Electronics - Wave Propagation and Antenna - Free download as PDF File (.pdf), Text File (.txt) or read online for free. The reflector antenna will be manufactured and tested at L3Harris facilities in Palm … How does a parabolic reflector provide very high gain ? This parabolic reflector antenna is used in conjunction with horn antenna as shown in the figure. A parabolic reflector antenna is commonly used for satellite communications, radio astronomy, and for various types of radio communication links. Wave propagation. Hello Friends, In this video , ihave discussed about solution of assignment of last 3 years of week 12 parabolic reflector antenna of subject antenna which falls under NPTEL MOOC course. Communication Systems MCQ question is the important chapter for a Electrical Engineering and GATE students. 12. 2. Director(s): Used to provide the antenna with directional power and gain. A. Electrical Engineering MCQ - English . When used in conjunction with a radar set, the purpose of an echo box is to provide an artificial target. 49. A narrow, antenna-beam width in the horizontal plane C. A low repetition rate D. A high duty cycle. 2. 15. 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. The antenna gain helps reduce energy consumption when the node actively receives or transmit packets. Reflector: Used to reject signal outside its range as well as amplify what’s inside - think of a mirror reflecting light. A Is the same as that of dipole. Which conversion mechanism is performed by parabolic reflector antenna? It is usually mounted vertically, with the disc at the top and the cone beneath. Last week, Yahsat chose Airbus to build Thuraya 4-NGS. If the addition of a reflector makes the same field strength available … Reflector Antennas. None of these. 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. ______is not a microwave tube. 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. Microwave frequency range is----- [ ] a) above 30MHZ b) above 300MHZ C) above 200MHZ d) above 2000MHZ. Define spill over. The driven antenna 1the 3 images have currents of equal magnitude. Some of the desired rays are not captured by the reflector antenna and this constitute spill over. l. ASSEMBLY INSTRUCTIONS FOR MOSLEY CUBICAL QUAD MODEL MCQ- 3B The high performance of your MOSLEY Antenna … The maximum range will be proportional to 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. An antenna array is a radiating system, which consists of individual radiators and elements. 8. What are the applications of Yagi – Uda antenna ? 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. In a Yagi antenna, maximum direction of radiation is toward the a. director b. driven element c. reflector … Rhombic antenna 3. (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. Antenna and Wave Propagation Pdf notes book starts with the topics covering Antenna Basics, Thin Linear Wire Antennas, Antenna … A. 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. 47. C pyramidal horn. 14. What is the reason for using Yagi antenna for TV broadcast reception ? Anna University Regulation 2017 ECE Engineering (ECE) … A discone antenna is a version of a biconical antenna in which one of the cones is replaced by a disc. Page-5 section-1 7. A narrow, antenna-beam width in the vertical plane B. The antenna must pass all the power to the antenna in its pass bandwidth. 27. Bandwidth of the receiver 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. 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 primary radiation and secondary radiation as applicable to parabolic reflector ? A. cathode_ray tube B. magnetron C. travelling_wave … Line: The spine of the antenna used to hold the directors and reflectors and connect to the driven element. An antenna reflector is a device that is reflected in electromagnetic waves. Yagi uda antenna 4. Which antenna radiating region/s has/have independent nature of angular field distribution over the distance from the antenna? B paraboloid. Antenna beamwidth calculator. The total side to side beamwidth of the antenna main beam. The horizontal radiation pattern o a vertical dipole is a. figure- b. circle c. Narrow beam d. clover leaf. Parabolic Reflector Antenna. 5) o parabolic reflectors, corner reflectors o These are high gain antennas usually used in radio astronomy, microwave In a TV receiver antenna the length of reflector rod. Observe how the antenna arrays are connected. 11. Verilog programs. What are parasitic elements and where are they used ? In addition, undesired interferences are reduced compared to using an omnidirectional antenna because the transmitted signal is directed toward its intended recipient. A. ... 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. Home; Programs. Antenna reflectors can be a standalone device for redirecting FM energy or can be integrated as part of an antenna concentration. 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. Aperture area of the feed 4. B 1.5 km. Square of the diameter of the reflector 3. It is made of metal or screen mesh. 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 … 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. The isotropic antenna is represented by 1. Flat-plate Reflector Antenna. of ECE P a g e | 6 mounted. ... 40.A form of unwanted radiation working against the main beam caused by feeding a parabolic reflector with an isotropic source. 13. Reflector antennas: (Fig. 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. Yagi-Uda antenna consists of----- [ ] a) Folded Dipole b) Reflector C) Director d) All above 3. 46. 1. Microwave Engineering solved MCQs with an answer 1. Which may be used to … EC8701 AME Syllabus. D May be equal, more or less than that of dipole. C Is more than that of dipole. A measure of: 1 be integrated as part of an echo box is to provide an artificial target 1! Specific topic in Antennas Subject field Theory MCQ question is the reason for using Yagi antenna for angle α 180°/n. Unwanted radiation working against the main beam caused by feeding a parabolic reflector provide very gain. 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