Ham Radio Extra Class Practice Test 2025 - Free Extra Class License Exam Questions and Study Guide

Question: 1 / 400

What does the term "antenna polarity" refer to?

The angle at which the signal is transmitted.

The orientation of the radiation pattern of the antenna.

Antenna polarity refers to the orientation of the radiation pattern of the antenna. This is crucial in radio communication because the polarization of the radiated signal (such as horizontal or vertical) must match the receiving antenna's polarization for optimal reception. When both antennas are polarized in the same orientation, there is maximum coupling of the radio waves, leading to improved signal strength and quality.

In practical terms, if you have a vertical antenna transmitting a signal, it will be received best by another vertical antenna. If a horizontal antenna attempts to receive that same vertical signal, the effectiveness of signal reception will significantly diminish. Understanding antenna polarity helps operators design and deploy antenna systems that ensure better communication efficiency and performance.

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The frequency range of the antenna.

The size of the antenna compared to the wavelength.

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