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E9B04:What is the front-to-back ratio of the radiation pattern shown in Figure E9-2?

E9B04E9B

What is the front-to-back ratio of the radiation pattern shown in Figure E9-2?

Official figure for question E9B04

Direct answer summary (2024-2028 NCVEC pool)

The official correct answer for E9B04 is 28 dB.

The key fact is 28 dB. Match that fact to the exact condition in the question; the other choices describe a different rule, band, component, or operating situation.

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More questions in E9B

E9B01What is the 3 dB beamwidth of the antenna radiation pattern shown in Figure E9-1?E9B02What is the front-to-back ratio of the antenna radiation pattern shown in Figure E9-1?E9B03What is the front-to-side ratio of the antenna radiation pattern shown in Figure E9-1?E9B05What type of antenna pattern is shown in Figure E9-2?E9B06What is the elevation angle of peak response in the antenna radiation pattern shown in Figure E9-2?E9B07What is the difference in radiated power between a lossless antenna with gain and an isotropic radiator driven by the same power?