Search results
The formula for calculating the approximate length of a quarter-wave vertical antenna is: Quarter-wavelength in feet: 234 / frequency in MHz. Quater-wavelength in meters: 71.5 / frequency in MHz.
- Coil-Shortened Vertical Antennas
You can further reduce the height of the antenna by placing...
- Small Transmitting Loop Antennas
Design your own tuning capacitor for use with this antenna...
- BMI
Quarter-Wave Vertical Antennas: Coil-Shortened Vertical...
- Full-Wave Loop Antennas
Full-wave loop fed with an impedance-matching transfromer...
- Capacitance
Full-Wave Loop Antennas: Quarter-Wave Vertical Antennas:...
- VBar Governor Headspeed Calculator
To use this calcultor, enter your VBar governor's Max....
- Coil-Shortened Vertical Antennas
The VHF (Very High Frequency) range is 30 MHz to 300 MHz. Use this calculator to find the dimensions of a Dipole antenna designed to operate at this frequency range. A half-wave dipole antenna is comprised of two quarter-wavelength conductors placed end to end [1].
Ham Radio HF/VHF Antenna Lengths Chart. Here is a handy chart for determing 1/4 wave verticals, 1/2 wave dipoles, and full wave loop lengths. All antenna lengths in the information below are in feet and are the results based on the standard formula of 468 / FMhz = total length in feet.
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.
A quarter wave (λ/4) antenna designed for 20 meter applications (15 MHz) has a length of 3.3 meters. The length of radials, assuming a 10% increase, is 3.6 meters. This assumes a velocity factor of 0.66.
2.1. Antenna length based on the following formulars: 1/2 λ dipole (feet)= 468 / frequency in Mhz. 1/2 λ dipole (meters) = 142.65 / frequency in Mhz. Full wave loop (feet) = 1005 / frequency in Mhz. Full wave loop (meters) = 306.32 / frequency in Mhz. Cut wire slightly longer for connecting insulators and pruning. 22-Jun-2007 09:30 AM.
The cubical quad antenna is a four sided antenna, with each side about a quarter wave length long. Several factors influence the performance of the antenna, such as : Enter the formula for the antenna (normally 1005/f): divided by Freq. MHZ. Your quad's total length is feet. Each of the 4 sides are feet. Back to Top. 5/8th Wave Vertical Antenna.
