Hits
Antena Ringo para 144 MHz
The ringo antenna is commercially manufactured and very easy to build.It consists of an irradiating element and its base that is connected to the pipe that holds it, acts as earth or ground of the antenna
post 16 Apr 2024
Antenna for UHF VHF Links →
A Portable Antenna for Mode B and J Satellites
A 4:1 balun, constructed out of a 1/2 wavelength of RG-58 coax is used to couple the T match to the 50 ohm feedline
A turnstile antenna for 2-meter ARDF
Designed by Jay Hennigan, WB6RDV, these are the same type of antennas I've been using for about seven years for both championship and practice ARDF These are horizontally polarized omindirectional antennas as specified in the IARU R1 ARDF rules
Antena Direcional para UHF - 430 - 450mhz
The boom should be aluminum and rectangular. The diameter used in the antenna tested for this project was 2x2 cm and the total length was 1.80 meters
Antenna for 2m and 70cm
Small antenna for 2m and 70cm, after using it you can roll-up the antenna, very nice on holidays
155
A 4:1 balun, constructed out of a 1/2 wavelength of RG-58 coax is used to couple the T match to the 50 ohm feedline
Designed by Jay Hennigan, WB6RDV, these are the same type of antennas I've been using for about seven years for both championship and practice ARDF These are horizontally polarized omindirectional antennas as specified in the IARU R1 ARDF rules
The boom should be aluminum and rectangular. The diameter used in the antenna tested for this project was 2x2 cm and the total length was 1.80 meters
Small antenna for 2m and 70cm, after using it you can roll-up the antenna, very nice on holidays
Take off angle of horizontal antenna For horizontal polarization, the electric field will move sideways on a horizontal plane, while for vertical polarization it will oscillate up and down on a vertical plane
Rx antennas 4Square Rx Vertical Array My frequency design of 1.825 MHz a 90 degrees line would be 33,70 metersinstead of the previously calculated 33,27 m
Calculo da Antena Bazooka A double bazooka antenna is a combination that has a complete coaxial wave multiplied by its velocity factor and a total end-to-end length of 1/4 wave for each side affected by another driver shortening facto