Radio Amateur Quiz Canadian License

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Question A-007-005-005

For VHF and UHF signals over a fixed path, what extra loss can be expected when linearly-polarized antennas are crossed-polarized (90 degrees)?

Correct Answer

20 dB or more

Explanation

When linearly polarized transmitting and receiving antennas are oriented at 90 degrees to each other (cross-polarized), there is a theoretical infinite attenuation. In practice, reflections and imperfections result in significant loss, often 20 dB or more.

Warning: Generated by AI