Modern ham radio operators often face restrictions on antennas. This has made small antennas more popular, despite some limitations. [Tech Minds] reviews the GA-450 indoor active HF loop antenna and ...
[VK3YE] knows there are at least two things wrong with the cheap antennas you get with most SDR dongles. First, they are too short. You’d like to have enough to pull out a quarter wavelength on the ...
NASA and Georgia Tech are looking to replace large expensive ground link dishes with arrays of cheap antennas backed by signal processing. Information from satellites, such as Earth Observing-1 (EO-1) ...
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