Antenna calculators

Moxon antenna calculator: dimensions, plans, and tuning guide. Use this Moxon antenna calculator to generate the A–E dimensions for a classic 2-element Moxon rectangle from your design frequency and conductor diameter. Choose common amateur-radio bands or enter a custom frequency, then use the plans, construction notes, tuning steps, gain and radiation-pattern guidance below to turn the calculated geometry into a practical antenna.

Calculate the vertical and horizontal wire lengths for a half-square antenna, choose a corner-fed or end-fed configuration, and use the results as practical starting dimensions for building and tuning your antenna.

Calculate the wire length, side dimensions, loop height, wavelength, and quarter-wave matching section for a delta loop or other full-wave loop antenna. Enter your operating frequency, choose the loop geometry, and use the calculated dimensions as a practical starting point for construction and tuning.

EFHW antenna calculator: end-fed half-wave design and length

OCFD Dimensions, Design & Plans. Calculate the total length, short leg, long leg and feedpoint position for an off-center-fed dipole. Choose a band or custom frequency, select the OCF split, and use the results as a starting point for building and tuning your antenna.

Calculate section lengths for a multiband linked dipole, standard dipole, or inverted-V antenna by frequency. Enter the HF bands or exact operating frequencies you want to use. The calculator returns the starting cut length for each dipole leg, individual linked sections, link positions, and the complete active antenna length for every band. Linked dipole geometry […]