Antenna and Radio Wave Propagation
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Antenna and Radio Wave Propagation
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25 Questions

1. In an electrically small loops, the overall length of the loop is ______ one-tenth of a wavelength.
2. In which of the following type of measurement prior gain knowledge of antennas used in measurements is not necessary?
3. What is the frequency of antennas used for Reflection range?
4. What is the overall efficiency of a lossless antenna with reflection coefficient 0.15?
5. The wave number in air for EM wave propagating on a micro strip line operating at 10GHz is given by:
6. The distance between directors of Yagi-Uda antenna is ____
7. Effective dielectric constant of a microstrip is given by:
8. Height criteria required for mounting AUT under elevated range test is ______
9. Which of the following is false regarding a paraboloid antenna?
10. For receiving a particular frequency signal, which tuning component must be used by the loop to form a resonant circuit for tuning to that frequency?
11. What is the power radiated by the antenna with gain called as?
12. In which of the following type of folded dipole the number of conductors is varied?
13. The receiving antenna is designed to have ____ side-lobe-ratio and ____ SNR.
14. Relation between Antenna gain G and directivity D is ______
15. How do the elements of an active region behave?
16. If the progressive shift in antenna array is equal to zero then it is called _________
17. Which of the following causes the shortening effect on multi conductor folded dipole?
18. Which of the following antenna range is used for small antennas?
19. Which of the following doesn't come under outdoor ranges?
20. Which of the following antenna has the parallel slots along the inside surface of the horn?
21. If the input impedance of a half wave dipole Yagi-Uda is 73Ω, then input impedance of a half wave folded dipole as driven element is ____
22. In order to convert the bidirectional dipole to unidirectional system, we use _______
23. Which of the following statements is false?
24. The length of the director compared to the driven element is ______
25. The dipole to which the power is applied directly from the feeder in the Yagi-Uda antenna is called as _____

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