Below are the answers key for Multiple Choice Questions in Chapter 9: Antennas from the book Electronic Communication Systems by George Kennedy. Make sure to familiarize each and every questions to increase the chance of passing the ECE Board Exam.
1. c. acts as an antenna array
2. a. The rhombic antenna
3. c. log periodic
4. b. Horn
5. b. Protection of personnel working underground
6. d. To prevent reradiation of the local oscillator
7. d. Marconi
8. c. Protection of personnel working underneath
9. d. High gain
10. a. helical
11. b. isotropic antenna
12. a. effective height
13. d. allow the feed to be placed at a convenient point
14. a. reduce the bulk of the lense
15. a. circular polarization
16. d. useful as UHF receiving antennas
17. b. Log-periodic
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