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The log periodic is commonly used in high power short wave broadcasting where it is desired to invest in only a single antenna to cover transmissions over multiple bands. It is the only type of directional antenna that is directional ("beam" antenna) over its entire working range. discone antenna
An antenna such as the one described above is usable for both local and medium-long-distance communication across a frequency range of about 1:6 . For example, an antenna for the lower portion of shortwave (say, 3–18 MHz) will be roughly 33 m (110 feet) long, with conductors spaced 1 m (3.3 feet). For the higher portion of shortwave (5–30 ...
Only electrical waves traveling toward the feedpoint are collected; waves traveling away from the feedpoint are grounded through a terminating resistor at the end of the wire opposite the feedpoint. The resistive termination makes the antenna receive in only one direction, similar to an aperture antenna but much simpler to build. In order to ...
The Beverage antenna or "wave antenna" is a long-wire receiving antenna mainly used in the low frequency and medium frequency radio bands, invented by Harold H. Beverage in 1921. [1] It is used by amateur radio operators, shortwave listeners, longwave radio DXers and for military applications.
TL;DR: As of August 21, get this Eton Elite Executive shortwave radio for $149.99 — you'll save 40%.For every unlikely apocalyptic ending you can imagine (an alien takeover, zombies, the return ...
WWVH broadcasts its signal on four transmitters, one for each frequency. The 2.5 MHz transmitter puts out 5 kW, while the other transmitters provide 10 kW. The 2.5 MHz antenna is one quarter-wavelength tall, and radiates in an omnidirectional pattern. The 10 and 15 MHz antennas are omnidirectional half-wave antennas.
WWV Transmitter Building (2002 or earlier) WWV's 15 MHz antenna WWV is a shortwave ("high frequency" or HF) radio station, located near Fort Collins, Colorado.It has broadcast a continuous time signal since 1945, and implements United States government frequency standards, with transmitters operating on 2.5, 5, 10, 15, 20, and 25 MHz. [1]
'T'- and inverted-L antennas are typically used in the VLF, LF, MF, and shortwave bands, [3] [4]: 578–579 [2] and are widely used as transmitting antennas for amateur radio stations, [5] and long wave and medium wave AM broadcasting stations. They can also be used as receiving antennas for shortwave listening.