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Electrical Engineering
Exploring the Mysteries of Antenna Size and Frequency in Ham Radio Transmission
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[QUOTE="berkeman, post: 5508246, member: 8921"] Yeah, many of the larger antennas are DIY based on published plans or just back-of-the-envelope calculations. That's part of the fun of HAM radio, regardless of what band you are communicating in. Think of the resonant frequency of a bell. The larger the bell, the lower the sound frequency you get when you strike or drive it. It's the same with antennas -- you get the most efficient performance (coupling to EM radiation) when the physical size of the antenna matches the wavelength of the EM you want to transmit or receive. As [USER=477979]@tech99[/USER] said, the magic length is a half wavelength for a dipole antenna. :smile: [/QUOTE]
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Exploring the Mysteries of Antenna Size and Frequency in Ham Radio Transmission
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