Almost everyone uses at least one antenna each day. In fact, the majority of people use antennas for many conveniences in their daily life, whether they realize it or not. Devices such as keyless entry systems, freeway toll passes, satellite TV systems, pagers, cell phones, and wireless networks all require antennas. Very few people who use these antennas can explain how and why they work. Let’s take a brief look at antenna technology, and how antennas relate to our radio frequency networks.

Antennas are merely an extension of a radio transmitter or receiver. As a signal is generated, it is passed from the radio to the antenna to be sent out over the air and received by another antenna, then passed to another radio. The signal that ...

Get Maximum Wireless Security now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.