As Bob KØNR mentions in his article, Your First Dipole Antenna, erecting an antenna for HF operations The horizontal wire, half-wave dipole antenna is one of the simplest HF antennas to set up, it offers Trimming a dipole antenna refers to the adjustment of antenna length to operating frequency. When feed line and antenna feed point impedances match, your antenna system will have effective power at the antenna feed point.

He asked, “So how many antennas do I need?” with a multi-band HF antenna. The dual-band VHF/UHF antenna could be a Diamond X-50A , a Comet GP-3 , or similar antenna. Antenna Tuners – When trying to cover lots of bands with just a few antennas, an antenna tuner will An antenna tuner does not actually “tune your antenna” but it will tweak up the SWR of the antenna and

Or they might say “a resonant antenna always has an SWR of 1” or “My antenna is radiating well because SWR is all about impedance match, telling us how well the antenna or antenna system is matched to the antenna. construction of the antenna. Low SWR does not tell us anything about how well the antenna is working (antenna efficiency).

The 2023-2027 General License question pool seeks the length of a Yagi antenna's driven element: G9C02 : What is the approximate length of the driven element of a Yagi antenna? the Yagi-Uda antenna, was designed by Japanese inventors Shintaro Uda and Hidetsugu Yagi in 1926. The Yagi antenna is a directional antenna, or beam antenna. antenna’s gain, usually expressed in decibels (dB).

Back to Antennas: Energized antennas are oscillators too. It’s sort of like cheating; inserting the components to make the antenna act like a much longer antenna And there’s more than one way to calculate Q for an antenna. of the antenna. Many high-Q mobile antenna manufacturers implement mechanized antennas that change the antenna’s resonant

The 2019-2023 General License question pools asks about the advantage of a log periodic antenna: G9D06 : Which of the following is an advantage of a log periodic antenna? Higher gain per element than a Yagi antenna C. Harmonic suppression D. Polarization diversity The log periodic antenna is a specialized antenna with unique advantages. You may recognize this arrangement as a popular one for VHF and UHF television antennas.

Antenna location? Antenna gain? Many antennas provide signal gain, boosting the effective transmit power at the antenna. Antenna gain is defined in comparison to a reference antenna. It is a simple, inexpensive antenna, and this specific antenna stands about 60 inches high.

Putting up the antenna may look like a daunting task the first time around. For example, if you mount the antenna close to a metal rain gutter, it will severely detune the antenna To get the antenna trimmed to the proper length, start out by cutting the antenna a little long…you can Use an SWR meter or antenna analyzer to adjust the antenna for best (lowest) SWR at the desired operating For a more detailed look at this type of antenna, see the QST article, “Antenna Here Is A Dipole” and

Antenna for Your First Radio HT will be sold with a short integrated antenna often referred to as a rubber such as a 19-inch HT antenna that easily screws onto the antenna connector after the rubber duck is as a 2-meter band antenna. This applies to any type of antenna, including the 19-inch HT extended type and the mobile antenna types Stu WØSTU For additional insight on antennas, check out these HamRadioSchool.com articles: How Many Antennas

The 2019-2023 General License question pool asks about the maximum allowable height of antenna structures (FAA) limit the height of an antenna structure to a maximum value. It is a win-win for the pilots and the antenna owner. If you’re a couple of miles away from the runway a bit higher antenna is probably OK, but how high can With a heliport, the slope defining the maximum antenna height is 25:1, or the antenna may be 1/25 of

gain: G9C04: How does antenna gain stated in dBi compare to gain stated in dBd for the same antenna? Usually, antenna gain is expressed as a comparison with a reference antenna. One of the common antenna gain references is the theoretical point source antenna that radiates equally When an antenna’s signal strength is compared to the isotropic antenna, any gain in signal strength stated Another common reference antenna is the simple free space dipole antenna.

, more commonly called rubber duck antennas . I usually refer to this type of antenna as a very convenient crummy antenna. It is nice to be able to attach a higher performance antenna when needed, such as a longer handheld antenna or a mobile mag-mount antenna. For example, the Yaesu FT-60 uses a female SMA connector for the antenna connection.