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Moxon antenna for the 20-meter band.The antenna is the faint rectangle of wires held in tension by the bent X-shaped support frame. Moxon antenna for the 2-meter band. The Moxon antenna or Moxon rectangle is a simple and mechanically rugged two-element parasitic array, single-frequency antenna. [1]
Corner reflector antennas have moderate gain of 10–15 dB, [2] high front-to-back ratio of 20–30 dB, and wide bandwidth. Corner reflector antennas are widely used for UHF television receiving antennas , point-to-point communication links and data links for wireless WANs , and amateur radio antennas on the 144, 420, and 1296 MHz bands. [ 2 ]
This construction was used in three large umbrella antennas for the obsolete Omega navigation system which operated at 10–14 kHz, to eliminate the very difficult problem of insulating the mast base against the 200 kV antenna potential. Since the antenna is shorter than the resonant length of one-quarter wavelength, it has capacitance.
A high quality receiver for under $500. Add an antenna and an LNA for a complete satellite earth station. David Becker: 53/5: May 1982 Automatic power switcher: An easy-to-build elegant solution to having to throw multiple power switches. Gary McClellan: 53/5: May 1982 UHF-TV preamp: Part 2: Improve UHF reception with this 2-stage amplifier ...
The company was one of the earliest pioneers of community antenna television systems (cable television). The company headquarters was located at 401 Walnut Street in Philadelphia, Pennsylvania. Shapp sold the company to General Instrument in 1967. However, the Jerrold brand name continued to be used on equipment into the 1990s. [citation needed]
Panel antennas are common at Ultra high frequencies or UHF, where they are often used for cellular/mobile base stations or wireless networking due to their size and directional properties. At very high frequencies, such an antenna would be impractically large for most receiving applications unless implemented as no more than a two-bay design.
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