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The HB9XBG antenna is a vertical dipole antenna for short wave radio amateurs. It was developed by the Swiss radio amateur Walter Kägi, whose call sign HB9XBG is also the designation of the antenna. [1] During the test phase in 2020, HB9XBG built two vertical dipoles – one for the 20-metre amateur radio band and another for the 40-metre band.
He is the author of many papers on periodic surfaces and antennas, as well as two key books. The most significant work are the "Finite Antenna Arrays and FSS" [2] in which he discusses the design of the ultra wide band tightly coupled dipole antenna array and "Frequency Selective Surfaces: Theory and Design". [3]
Radio amateurs can build the Hexbeam as a multi-band antenna to cover different frequency ranges. Popular combinations cover 20m, 15m and 10m (3 band) and 20m, 17m, 15m, 12m and 10m (5-band) ham radio bands. Hexbeams can also be built for the 40m and 30m bands. The antenna elements for the lowest frequency band are located at the exterior of ...
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]
Tests done by J.S. Belrose (1994) [7] showed that though the conventional T²FD length is close to a full-size 80 meter (3.5–4.0 MHz) antenna, the antenna starts to suffer serious signal loss both on transmit and receive below 10 MHz (30 m), with the 80 meter band signals −10 dB down (90% power loss) from a reference dipole at 10 MHz. [7]
Louis Varney (G5RV) invented this antenna in 1946. [4] It is very popular in the United States. [5] The antenna can be erected as horizontal dipole, as sloper, or an inverted-V antenna. With a transmatch, (antenna tuner) it can operate on all HF amateur radio bands (3.5–30 MHz). [5] [6]
^A 34 games vacated by the NCAA (overall record of 27–9, conference record of 12–4). Adjusted record is 1–1 and 1–1 in conference. ^B 16 games vacated by the NCAA, as well as conference regular season championship (overall record of 22–7, conference record of 13–3).
FanDuel Sports Network Great Lakes was launched on March 12, 2006, as SportsTime Ohio; it was founded by the family of Cleveland Indians owner Larry Dolan, becoming the second regional sports network in the Cleveland area, after Fox Sports Ohio (which launched in February 1989 as SportsChannel Ohio).