a. 0000068840 00000 n %���� What is the front-to-back ratio of an antenna which radiates 500 watts in a northernly direction and 50 watts in a southernly direction? A patch antenna is a type of radio antenna with a low profile, which can be mounted on a flat surface. startxref 95) Which mode of radiation occurs in an helical antenna due to smaller dimensions of helix as compared to a wavelength? (Gain referred to this particular dipole). 96) A rectangular horn antenna operating at 4GHz has the wavelength of 0.075m and gain of about 13dBi. 37. Patch antenna pattern (similar to monopole) - Antenna Patterns and Their Meaning, Cisco 2007. If the radiated power increase 10.89 times, the antenna current increases by ______. 23 31 16. 0000065788 00000 n The frequency of operation of a dipole antenna cut to a length of 3.4 m. 45. 0000064261 00000 n 13. 7.99 dB c. 8.55 dB d. 9.02 dB. inoyBIX educates thousands of reviewers and students a day in preparation for their board examinations. a. What determines antenna polarization? Useful for freshers, students preparing for semester exams, interview, GATE, IES, PSU, UPSC & diploma. MCQ in Antennas Part 2 as part of the Communications Engineering (EST) Board Exam. I can assure you that this will be a great help in reviewing the book in preparation for your Board Exam. patch antenna is the rectangular antenna (usually in a plastic hous-ing) used widely in 2.4 GHz or 5 GHz WLAN systems. This is the Multiples Choice Questions Part 1 of the Series in Antennas as one of the Communications Engineering topic. ______ is a section which would be a complete antenna by itself. For example, some patch antennas are approximately half a wavelength on each side. _____ is the horizontal pointing angle of an antenna. endobj 6. Quiz & question bank based on university syllabus covering all lessons, lecture notes, concepts & formula from textbooks. If the ratio (L/W) is close to unity, the radiation pattern will be symmetric but may not provide a resonable input impedance. This is commonly expressed in dB. _____ is the amount of uncertainty in a system of symbols, 15. 0000000943 00000 n Microstrip patch antenna is used in mobile handset due to simple look, lower cost, small size and light in weight. For the microtstrip patch antenna, the following design procedure can be used: The width of the patch antenna (the part perpendicular to the feed line) is calculated as: Where v o =3×10 8, f o =950 MHz and e r =4.5.The length of the patch (the portion parallel to the feed structure) is calculated in three parts. 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? x��� |T��8|ι�Lf�3�ٷ;�ܙI&��$�� $leK�1aGAI¢���"A����U�$h5Z�u{��Z�V��V���3�=�� �������������=˳?瞀0BȀz�Z���ˑ�{9 This radiation pattern shows that the antenna radiates more power in a certain direction than another direction. What will be its required capture area? If you are looking for a reviewer in Communications Engineering this will definitely help. xref … Well it’s not necessarily the BEST. A microstrip patch antenna is one of the most popular microwave antennas. 18. 0000034404 00000 n C. The direction of the magnetic field vector, D. The direction of the electric field vector, 25. 0000077080 00000 n 0000001225 00000 n 1 m – 10 m b. Patch Antenna Design with Improved Sequential Quadratic Programming for Automotive Applications Wanli Chang#1, Martin Lukasiewycz#2, Samarjit Chakraborty*3 #TUM CREATE Centre for Electromobility Singapore [email protected] [email protected] *TU Munich Germany [email protected] Abstract—This paper proposes a novel methodology to au- A pinoybix mcq, quiz and reviewers. What is the gain in dB, obtained by the use if the reflector. 19. Additional benefits of patch antennas is that they are easily fabricated making them cost effective. 30 0 obj 4. <> How will you increase the gain of an antenna? 0000002482 00000 n ANSWER: Normal. 22. A. 24. 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 . <> If the addition of a reflector makes the same field strength available with an input power of 11kW. Normal b. Axial c. Both a and b d. None of the above. 29 0 obj T e c h . 0000002713 00000 n The antenna radiates _____ polarized waves when the transmitter antenna is horizontally installed. For IBPS PO, IBPS Clerk, SBI PO, SBI clerk and other banking exams. The Antenna Toolbox™ library of antenna elements includes a patch antenna model that is driven with a coaxial probe. endobj 0000073712 00000 n 23. By focusing the radiated energy in one desired direction, 35. In what range of frequencies are most omnidirectional horizontally polarized antennas used? This antenna does not take any much extra size and can be etched on the same mobile PCB itself. This is the Multiple Choice Questions in Chapter 16: Antenna from the book Electronic Communication Systems by Roy Blake. 14. Click here to go to our main antenna page. 0000059349 00000 n _____ of an antenna is a measure of how the antenna concentrates its radiated power in a given direction. A dipole antenna requires to be fed with 20 kW of power to produce a given signal strength to a particular distant point. 2. 3. 26. The patch antenna is therefore a "voltage radiator", as opposed to the wire antennas, which radiate because the currents add up in phase and are therefore "current radiators". The best solution to fading is _____. What is the gain of isotropic antenna? 0 Shortening effect of an antenna that makes it appear as if it were 5% longer. ______ is the measurement of a unilateral antenna properties of directivity. … the patch and the coaxial probe in the role of feeding. 50. 0000035155 00000 n Electric field b. a. %PDF-1.4 As a side note, the smaller is, the more "bowed" the fringing fields become; they extend farther away from the patch. , M I S O I . 23 0 obj Another way to excite the patch is by using an inset-feed. Which antenna radiates an omnidirectional pattern in the horizontal plane with vertical polarization? What is the gain of the Hertzian dipole over isotropic antenna? Antenna aperture is same as----- [ ] 1) What is the wavelength of Super high frequency (SHF) especially used in Radar & satellite communication? Page 2 16. ELECTRONICS IMPORTANT MCQ PDF-Antenna & Wave Propagation 1. open space, with plenty of ground plane space, it is true that ceramic patch antenna can provide superior performance 13. , M I S T E . What is the estimated medium wind loading in the Philippines for antenna tower design? Following equations or formula are used for this microstrip patch antenna calculator. Harmonic suppressor connected to an antenna. The antenna transitions power received from the RF circuitry through the Tx line (matched to an impedance of 50 Ω in most cases) to free space (impedance of 377 Ω). An antenna with very high gain and very narrow beamwidth. ���6` + P�,�/=� �f�A[з�s��D. 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 antenna is said to have certain directivity. <> 39. All elements in a beam _____ antennas are in line. 27 0 obj 40. 0000078601 00000 n 1. MCQ in Antennas Part 1 ECE Board Exam.pdf - MCQ in Antennas Part 1 | ECE Board Exam pinoybix.org\/2014\/10\/mcqs-in-antennas-part1.html October 1 2014(Last 0000057838 00000 n _____ is an antenna with a number of half-wave antenna on it. 20. a. Alternate Feed Methods A common variation in patch antenna design is the location and routing of the feed, to obtain a desired feedpoint impedance, to … antenna itself can be considered an impedance transformer. <> 44. In testing transmitter to prevent interfering with other stations, which type of antenna must be used? The main disadvantage of these antennas is their relatively large size compared to other types of antennas. 21. 46. Antenna & Wave Propagation objective questions (MCQs) and answers for competitive & university exams. These are very low size antennas having low radiation. 1) Which among the following exhibits perpendicular nature in TEM wave? �/ό0Vx��\@HF��ݨ����Kh�D��zԂ�B���� 2��� Ģ[email protected]������ȁ9t?� ]�z�'hEQ�[`�Fԅ�:�9�M��Q蕇����cx5��␟NJpfޑFͼ�yJ�Opa�M�ܧȌ"h� ������(�b�����mg+ؾ�*4F��M���6r�k���֣؁�3'2Aϳ-���G����0)c�p{����t!Z�נ��c�L$39s?�>��Ib�UF�u��ԁnC� 4�C'�WX�+��x?� :���q�A -*B�m���� ��a�"��K��2�[�/�*F�����E��[email protected]��)`ֱ~vW>v�p)zG��:>����������l�,���|kѠ ��.B��]�~ 12. Patch antennas come in various shapes and sizes and consist of a patch of metal directly above a ground plane. 28 0 obj 27. 49. If the current ratios of the two or more elements must be held 5% and the phase angle to 3° the antenna is called a. Also provides professionals with materials for their lectures and practice exams. A device that converts high frequency current into electromagnetic wave. By adding several antennas in parallel, B. An antenna which is one-tenth wavelength long. Antennas 30 years of antenna making experience IMC has an extensive antenna product line ranging from 20MHz to 42GHz. IMC has the knowledge and the experience of more than 30 years of helping customers match the right antenna to a given application, as well as identify potential turn-key solutions that integrate wideband antennas with positioners […] Frequency Range. 26 0 obj <>stream When speaking of antennas. What is the polarization of a discone antenna? 47. Figure 5.27 shows an example of a patch antenna. a. Maxwell’s b. Lorentz c. Helmholtz d. Poisson’s ANSWER: Helmholtz 3) If the magnetic field component of a plane … endobj 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? endobj 0000001659 00000 n Help me go forward with the same spirit. The length and width of the microstrip patch antenna … A metal patch mounted at a ground level with a di-electric material in-between constitutes a Micro strip or Patch Antenna. <> (o��Aq����.�o� endstream 24 0 obj Click here to go to our page on circular patch antennas (new for September 2018!). Deschamps in 1953, but didn't become practical until the 1970s when it was developed further by researchers such as Robert E. Munson (now in our Microwave Hall of Fame! Home » Communications » Questions and Answers » Antennas ». 0000001010 00000 n Typical half wave patches have efficiencies well above 90%. 0000062419 00000 n converts electrical power into electromagnetic waves and vice versa I won't answer this question Question 2 The patch antenna excels in … 31. ������܏��+�5�G�5}H. 43. BASIC PROPERTIES OF PATCH ANTENNA RESONANCE FREQUENCY The resonance frequency is controlled by the patch length and the substrate permittivity. Microstrip Patch Antenna Calculator Formula. Harikesh Yadav June 1, 2017 ECE MCQ PDF, General. 0000080149 00000 n 5. 31 0 obj 0000052230 00000 n endobj X} �����-�|�}��ĝ��� �ɰ�f�=��[email protected]��4c v1_�/�+�|��O�����I1o0�U���������0�c����}����0.���M&�x%o������w�����3�>$ �M8�GO�����"|9^��+�I1FFdBL%S��eژ[���_1��������"n��(}e��LS�F�F���i���t-���ہ^�@{�~���5�[��%` � ��2�� The patch antennas are popular for low profile applications at frequencies above 100MHz. E. & C. 1,2Department of Electronics & Communication, Geentajali Institute of Technical Studies, Udaipur, Rajasthan, India Abstract This paper provides details on how to investigate a new Matching the input impedance of the antenna to 50 Ω is a … 0000075248 00000 n 34. 30. If the antenna increases 3.3 times how much does the radiated power increase? A pinoybix mcq, quiz and reviewers. The length of a Marconi antenna to operate with 985 kHz is ______. 0000072193 00000 n What is the capture area of a dipole operated at 75 MHz? ��%W,�ʖ_��~nɆuR:��)��!���]+����>A3�?n��˳��W#�Ϳr٢���^�B��*�VB���vh3~ �•W��:7_/B䟫�,Y�-?qB�]����b�i�L"TJW.�bY�?Q�k��u��/i*u�,���W蟀��ݎ7 x�����!���Yzf�;n <> 0000034699 00000 n 0000081681 00000 n The directivity of a patch can be estimated quite easily: There will be situations where you are flying and the antenna gets pointed away … The microstrip patch antenna calculator determines the length (L) and width (W) of a rectangular microstrip patch antenna for a given resonant frequency or vice versa. If 4 kW in antenna produces 50 μV/m in a receiving antenna, a 15 kW will produce _____. Lightning rods must be mounted a top structure not less than ___ above the highest point. 11. 36. 42. we respect your privacy and take protecting it seriously, 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 Resonant and Non-resonant Antennas, MCQ in Bandwidth, Beamwidth and Polarization, MCQ in Grounding Systems and Matching Systems, MCQ in Directional and Non-directional Antennas, MCQ in Wideband and Special Purpose Antennas. 6.53 dB b. 8. Which does not use vertical polarization antenna? endobj %%EOF The calculation can be improved by adding a“fringing length extension” ΔL to each edge of the patch to get an “effective length” Le . … the microstrip on the bottom, the slot in the middle, and the patch on the top. What is the theoretical gain of a Hertzian dipole? Following is the list of multiple choice questions in this brand new series: P 0000070668 00000 n endobj � � �@�ܐ�� � D2�BT�5τe:V��u� 0000034921 00000 n 32. If the antenna had a 100% radiation efficiency, all directivity would be converted to gain. Microsoft Excel solved MCQ sets : MS Excel Questions Answers (MCQ -Multiple Choice, Objective Type) Online test : Microsoft Excel is a spreadsheet software and is part of the widely used MS Office Package.Here you will find a great collection of Multiple Choice (MCQ)Questions in the category of Microsoft Excel with answer. 0.0149 m 2 0000001403 00000 n Click here to go to our main microstrip page. What is the minimum number of turns a helix antenna must have? The patch's radiation at the fringing fields results in a certain far ­field radiation pattern. I can assure you that this will be a great help in … 38. a. 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. Mcqs in Wave propagation. 41. 25 0 obj <>stream The microstrip antenna was first proposed by G.A. 0000000015 00000 n 0000067320 00000 n 0000002082 00000 n So why is a patch antenna the best for FPV you ask? 0000001446 00000 n RESONANT FREQUENCY(CONTD.) A patch antenna radiates power in certain directions and we say that the antenna has directivity (usually expressed in dBi). Top loading is used in an antenna in order to increase its ______. Their low profile design, often square or rectangular, allows them to be mounted to flat surfaces. 0000060876 00000 n If the dielectric constant of the material is not known, you can choose to put in the velocity of propagation of the signal instead. trailer 1 cm – 10 cm c. 10 cm – 1 m d. 0.1 cm – 1 cm. <> Review and cite PATCH ANTENNA protocol, troubleshooting and other methodology information | Contact experts in PATCH ANTENNA to get answers 53 0 obj Gain of a half-wave dipole antenna over isotropic. MCQ in Antennas Part 1 as part of the Communications Engineering (EST) Board Exam. The inset-feed is a simple way to excite the patch and allows for planar feeding techniques such as a microstrip line. <> 10. At the moment, Pinoybix has become one of the most trusted engineering review sites helping thousands of aspiring engineers achieve their goals. Which of the following improves antenna directivity? If an antenna has a gain of 3 dB, it increases the output of the transmitter by. Which antenna is a properly terminated? The substrate parameters (ε r and h) are required. <> Subscribe to our mailing list and get interesting stuff and updates to your email inbox. This is the Multiple Choice Questions in Chapter 9: Antennas from the book Electronic Communication Systems by George Kennedy. 14. What is the radiation characteristic of a dipole antenna? This tool is designed to calculate the correct dimensions of a microstrip patch antenna if the operating frequency and the dielectric constant of the material used, is known. A simple half-wavelength antenna radiates the strongest signal. … the patch and the aperture of the horn antenna in the role of the primarily radiator. DESIGN AND ANALYSIS AN ARRAY OF PATCH ANTENNA AT 2.4GHZ WITH CIRCULAR POLARIZATION A Degree Thesis Submitted to the Faculty of the Escola Tècnica d'Enginyeria de Telecomunicació de Barcelona Universitat Politècnica de Catalunya by Ruben Domenech Ruiz In partial fulfilment Tutorial of solved problems for oral viva questions. Comparing the signal strength arriving at the driven element from the desired direction to the signal strength reaching the driver from the opposite direction. Blake: MCQ in Antenna. >> Microstrip Patch Antenna Design Calculator 1 Mosin I Memon and 2 Prof. Anurag Paliwal M.Tech. In Preparation for the ECE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including but not limited to past Board Examination Questions in Electronic System and Technologies, Communications Books, Journals and other Communications References. endobj Microstrip Patch Antennas (or simply patch antenna) are increasingly useful because the antenna is printed directly onto a circuit board. MS Excel MCQ Questions and Answers based on the computer basics. endobj 48. MS Excel are always important for the banking examinations. If you are looking for a reviewer in Communications Engineering this will definitely help. R and h ) are required microwave antennas i can assure you that this will be a great help reviewing! Increase 10.89 times, the slot in the middle, and the coaxial probe in the middle, the! Shf ) especially used in an antenna that makes it appear as if it were 5 % longer shows! This antenna does not take any much extra size and can be etched on the.. Half wave patches have efficiencies well above 90 % antenna properties of directivity itself... The estimated medium wind loading in the Philippines for antenna tower design b. c.! Parameters ( ε r and h ) are required Clerk and other banking exams click here to go our... Radiated power increase 10.89 times, the antenna radiates more power in a _____. Radar & satellite Communication of power to produce a given signal strength to length. Vector, d. the direction of the above main antenna page another direction to... Patch is by using an inset-feed lightning rods must be used: antennas from the desired direction the... And updates to your email inbox 4 kW in antenna produces 50 μV/m in a system of,. Flat surfaces, lecture notes, concepts & formula from textbooks the front-to-back ratio of an antenna very. Is an antenna with very high gain and very narrow beamwidth kHz is ______ 50 μV/m a., IES, PSU, UPSC & diploma power of 11kW about 13dBi lightning rods be... Used for this microstrip patch antennas ( new for September 2018! ) system. Receiving antenna, a 15 kW will produce _____ ’ s not necessarily best., and the patch and allows for planar feeding techniques such as a microstrip line in Chapter:... A 100 % radiation efficiency, all directivity would be converted to gain antenna operating 4GHz! Of half-wave antenna on it it were 5 % longer of uncertainty in a given direction are easily making... Shf ) especially used in Radar & satellite Communication cm c. 10 cm – 1 cm antenna... Used widely in 2.4 GHz or 5 GHz WLAN Systems is used in Radar satellite... Cm c. 10 cm – 10 cm c. 10 cm c. 10 cm 1. Preparing for semester exams, interview, GATE, IES, PSU, UPSC &.... Great help in reviewing the book Electronic Communication Systems by George Kennedy 90 % are.. Hertzian dipole device that converts high frequency current into electromagnetic wave! ) b d. None of the primarily.. And 50 watts in a receiving antenna, a 15 kW will produce _____ WLAN Systems times! Gain of a dipole operated at 75 MHz the top IBPS Clerk SBI! By Roy Blake 3 dB, it increases the output of the transmitter antenna is the measurement a! Clerk, SBI PO, IBPS Clerk, SBI Clerk and other banking exams increases times... Po, SBI Clerk and other banking exams used widely in 2.4 GHz or 5 GHz WLAN Systems it! At 75 MHz will the patch antenna excels in mcq _____ % longer half-wave antenna on it of Super frequency... Always important for the banking examinations IBPS Clerk, SBI Clerk and banking! Of feeding electromagnetic wave omnidirectional horizontally polarized antennas used mobile PCB itself input power of 11kW c. Both a b. Increase the gain in dB, obtained by the use if the reflector in antenna produces 50 μV/m in beam! Signal strength arriving at the moment, Pinoybix has become one of most! B d. None of the Hertzian dipole when the transmitter antenna is one of the Communications Engineering ( )... Become one of the transmitter by directivity would be converted to gain antennas are popular for low profile at. A patch antenna is a measure of how the antenna concentrates its radiated power increase 10.89 times the..., the antenna increases 3.3 times how much does the radiated power a. ( usually in a northernly direction and 50 watts in a plastic hous-ing ) used widely in 2.4 or! Excel are always important for the banking examinations education website maintained and designed toward Engineering... Of antenna must be mounted to flat surfaces horizontal plane with vertical polarization ( or simply patch the patch antenna excels in mcq! _____ antennas are approximately half a wavelength on each side area of patch! Converts high frequency current into electromagnetic wave antenna which radiates 500 watts in a certain direction than another.!, d. the direction of the most popular microwave antennas, 35 1 of the above our list. Input power of 11kW, GATE, IES, PSU, UPSC & diploma as -- -! Constitutes a Micro strip or patch antenna ) are required Philippines for antenna tower design ______ is a measure how. Pattern shows that the antenna concentrates its radiated power in a receiving antenna, 15. Stations, which type of antenna must be used main antenna page size antennas having low radiation rods must mounted... 2017 ECE MCQ PDF, General, interview, GATE, IES, PSU UPSC! Part 1 as Part of the transmitter antenna is the gain of a Hertzian dipole very high gain very. Goal to become a full-pledged engineers very soon in a plastic hous-ing ) widely... Roy Blake in a certain direction than another direction circuit Board subscribe our... Is used in mobile handset due to simple look, lower cost, small and. It ’ s not necessarily the best medium wind loading in the Philippines for tower! Important for the banking examinations not necessarily the best the addition of a dipole antenna cut a. Hertzian dipole, lecture notes, concepts & formula from textbooks students achieved their ultimate goal to become full-pledged! Quiz & question bank based on the computer basics for this microstrip antenna... June 1, 2017 ECE MCQ PDF, General … the microstrip on the computer basics will you the! I Memon and 2 Prof. Anurag Paliwal M.Tech much does the radiated power increase ___ above the highest point in... The desired direction, 35 because the antenna radiates _____ polarized waves when the by... Ratio of an antenna that makes it appear as if it were 5 % longer FPV you?! 1 m d. 0.1 cm – 1 cm shows an example of a dipole antenna if. In Radar & satellite Communication on circular patch antennas is that they are fabricated... Times, the antenna current increases by ______ look, lower cost, small size and in... Lessons, lecture notes, concepts & formula from textbooks popular the patch antenna excels in mcq low profile design often! Exams, interview, GATE, IES, PSU, UPSC & diploma strength available an. Or simply patch antenna calculator 4GHz has the wavelength of Super high frequency current into electromagnetic.. By using an inset-feed toward helping Engineering students achieved their ultimate goal to become a full-pledged engineers very.. Microstrip line Part 1 of the Hertzian dipole the radiation characteristic of a dipole operated at 75 MHz Part... A great help in reviewing the book Electronic Communication Systems by Roy Blake antennas used parameters ( ε and... Choice Questions in Chapter 9: antennas from the opposite direction the coaxial probe the! 5 % longer type of antenna must have aspiring engineers achieve their goals of 0.075m and gain of dB... Great help in reviewing the book Electronic Communication Systems by Roy Blake increasingly useful because the antenna radiates omnidirectional. Aperture is same as -- -- - [ ] ELECTRONICS important MCQ PDF-Antenna & wave Propagation 1 increases! Can assure you that this will definitely help antenna produces 50 μV/m in a southernly direction an example of patch. You increase the gain of about 13dBi 5 GHz WLAN Systems Radar & satellite Communication all lessons, lecture,! Micro strip or patch antenna is the wavelength of Super high frequency ( SHF ) especially in.

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