Antenna Terminology » Exercise – 1
9. 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) 25000 dB
(b) 10 dB
(c) 100 dB
(d) 20 dB
Subject Name : Communication Engineering Exam Name : IIT GATE, UPSC ESE, RRB, SSC, DMRC, NMRC, BSNL, DRDO, ISRO, BARC, NIELIT
Posts Name : Assistant Engineer, Management Trainee, Junior Engineer, Technical Assistant
Electronics & Communication Engineering Books
GATE 2023 Total Info ENGG DIPLOMA UGC NET Total Info IES 2023 Total Info PSUs 2022 Total Info CSIR UGC NET Total Info JAM 2023 Total Info M TECH 2023 Total Info RAILWAY 2022 Total Info
Related Posts
Practical Antennas » Exercise - 1 1. Which is a non-resonant antenna ? (a) rhombic antenna (b) folded dipole (c) end-fire array (d) yagi-uda antenna 2. Gain of a half-wave dipole antenna over isotropic. (a) 2.15 dB (b) 1.76 dB (c) 1 dB (d) 0 dB 3. What is the polarization of a discone antenna ? (a) vertical (b) horizontal (c) circular (d) spiral 4. What is the gain of the Hertzian dipole over isotropic antenna ? (a) 1.64 dB (b) 2.15 dB (c) 1.76 dB (d) 1.55 dB 5. Which antenna radiates an omnidirectional pattern in the horizontal plane with vertical polarization ? (a) marconi antenna (b) discone antenna (c) horn antenna (d) helical antenna 6. An antenna with very high gain and very narrow beamwidth. (a) helical antenna (b) discone antenna (c) horn antenna (d) parabolic dish antenna 7. What is the radiation characteristic of a dipole antenna ? (a) omnidirectional (b) bidirectional (c) unidirectional (d) hemispherical 8. An antenna which is one-tenth wavelength long. (a) hertzian dipole (b) loop antenna (c) marconi antenna (d) elementary doublet 9. ………. is an open-ended slot antenna. (a) helical antenna (b) rhombic antenna (c) notch antenna (d) cassegrain antenna 10. What is the gain of isotropic antenna ? (a) 10 (b)…- Practical Antennas » Exercise - 1 4. What is the gain of the Hertzian dipole over isotropic antenna ? (a) 1.64 dB (b) 2.15 dB (c) 1.76 dB (d) 1.55 dB
- Practical Antennas » Exercise - 1 2. Gain of a half-wave dipole antenna over isotropic. (a) 2.15 dB (b) 1.76 dB (c) 1 dB (d) 0 dB
- Antenna Terminology » Exercise - 18. …………. of an antenna is a measure of how the antenna concentrates its radiated power in a given direction. (a) efficiency (b) power (c) gain (d) polarization
- Antenna Terminology » Exercise - 1 11. Comparing the signal strength arriving at the driven element from the desired direction to the signal strength reaching the driver from the opposite direction. (a) directivity (b) sensitivity (c) beamwidth (d) front-to-back ratio