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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
I disagree. with the J Pole VS Slim Jim.. The Slim Jim is a...
- Resonant Frequency Calculator
Resonant Frequency Calculator - 1/4 Wave Ground Plane...
- dBm, dBW, µW, mW, Watt, Kw and Mw Calculator
I wish to use an excel spread sheet to calculate the total...
- Loaded Quarter Wave Antenna Inductance Calculator
If it is a quarter wave vertical, It needs counterpoise or a...
- 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...
- Slim Jim and J Pole Calculator
A ground plane antenna for 2m or 70cm is one of the simplest antennas to build and get working, and it can work quite well for repeater or simplex operation. It is easy to build for other bands as well. I’ll show you several different construction methods that you can use, based on the materials you have available.
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 · I built a quarter-wave wave ground plane for 403 MHz, with the elements about 18 cm (7 inches) long, with radials that are about 15% longer. Amateur Radio/AIS Antenna. I also built a 145 MHz amateur band antenna for receiving Amateur satellites.
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.
Here's one: A simple ground- plane antenna you can build—for 146, 223 or 440 MHz—in no time flat. It features wire-end loops for safety (sharp, straight wires are hazardous) and convenience (its top loop lets you hang it off high objects for best performance).
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.
