Search results
This calculator can be used to design a Quarter Wave Ground Plane antenna, with radials. The radiating element is a quarter wave (λ/4) and the radials are 12% longer. There are usually four radials, three being a minimum, but you could use up to six.
- Slim Jim and J Pole Calculator
Hi Leigh. Well, a dual band slim jim can be done, but it’s...
- Resonant Frequency Calculator
Resonant Frequency Calculator - 1/4 Wave Ground Plane...
- dBm, dBW, µW, mW, Watt, Kw and Mw Calculator
dBm, dBW, µW, mW, Watt, Kw and Mw Calculator - 1/4 Wave...
- Loaded Quarter Wave Antenna Inductance Calculator
You will need a good ground system with an end fed quarter...
- Electricity Cost Calculator kW/h
Electricity Cost Calculator kW/h - 1/4 Wave Ground Plane...
- Ohms Law Calculator
Ohms Law Calculator - 1/4 Wave Ground Plane Antenna...
- T Attenuator Calculator
T Attenuator Calculator - 1/4 Wave Ground Plane Antenna...
- PI Attenuator Calculator
PI Attenuator Calculator - 1/4 Wave Ground Plane Antenna...
- Slim Jim and J Pole Calculator
The Quarter Wave Ground Plane is a very common, simple, and effective antenna. Generally it consists of a quarter wave vertical radiator connected to the center of the coax feeder, and 4 radials, often sloping downwards, that are also about a quarter wave long.
11 lut 2020 · I know that an antenna that has half a wavelength does not need the ground plane (example a dipole antenna) and when using a wavelength of 1/4 it is usually necessary to have the ground plane (planar antennas [PCB]).
The quarter wave is a good reliable antenna, and SWR is very robust and not affected by rain or snow etc. It can be built with very predictable results, even near trees or buildings, due to it’s low feed impedance.
26 lut 2022 · Building a 1/4 wave ground plane antenna is very easy to do. The overall design is simple, with a vertical element surrounded by a ground plane consisting of two or four wires bent down. Here are the dimensions for the VHF/UHF amateur radio bands (from the ARRL Handbook), but these dimensions can be scaled to any frequency.
Ground mounted antennas: Even with as few as 4 radials, the antenna can perform significantly better than with no radials at all. This setup can work for temporary installations or when space and resources are limited.
21 sie 2018 · Today we’re going to build a simple ground plane for the VHF 2 meter band. Ground plane antennas are easy to recognize by their appearance. First off you’ll notice the radiating element. This element is 1/4 wavelength long, or about 19 inches for the 2 meter band.
