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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]
Masts of the Rugby VLF transmitter near Rugby, England. By 1930 the expense of the T-antenna led broadcasters to adopt the mast radiator antenna, in which the metal structure of the mast itself functions as the antenna. [2] (pp 79–81) One of the first types used was the diamond cantilever or Blaw-Knox tower.
Used for elevated base station antennas for land mobile radio systems such as police, ambulance, and taxi dispatchers. Mast radiator A radio tower in which the tower structure itself serves as the antenna. Common form of transmitting antenna for AM radio stations and other MF and LF transmitters.
Kit Single band 80m / 40m / 30m / 20m 2 CW Yes Mosquita III Kit 40m 5 CW No [51] Nouveau 75A Kit 80M 5 (Carrier) / 20 PEP AM: Yes Splinter II Kit 40m 0.5 CW Yes OHR 100A Kit 80m / 40m / 30m / 20m / 15m 5 (4–4.5 on 15m) CW Yes BCR Blue Cool Radio Kit (80m) / 40m / 30m / 20m / 17m 5 CW No [51] QRPGuys DSB Digital Transceiver II Kit 40m / 30m / 20m
The 70-centimeter amateur band also provides a wider spectrum than the 2-meter band (in the U.S., this is 30 MHz of spectrum, compared to only 4 MHz on the 2-meter band). [2] This allows for many more channels, accommodating fast scan television , wideband digital modes, and point-to-point linking, which may not be permitted on 2-meter and ...
This allows the antenna to be made much shorter than the normal length of a quarter-wavelength, and still be resonant, by cancelling out the capacitive reactance of the short antenna. This is called an electrically short whip. The coil is added at the base of the whip (called a base-loaded whip) or occasionally in the middle (center-loaded whip).
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