Wire Antenna Calculator

Dipole and Inverted Vee Antenna Calculator

Sufficiently accurate for wire antennas up to 30 Mhz.

Enter primary operating frequency in Mhz.
Inverted Vee, approximate angle from horizontal.

Click to or

Dipole's length		Assuming level ground, the minimum height of vee will be (length of leg * sin(angle from horizontal) plus the height of endpoints of vee above ground. The horizontal spread of Vee will be the distance from endpoint to endpoint, plus the tie off points..
Each leg

Total Vee length
Each Vee leg
Min vert. height
Min horiz. spread

NOTE: Remember that location, height, obstructions, wire type, wire coating, etc will effect the calculated lengths. Always cut your wire a little longer and then trim for your installation.

The basic formula for determining the wire length of a center fed, 1/2 wave wire dipole or inverted Vee antenna (30 mhz or less) is 468/freq(mhz).

The inverted Vee antenna will be shorter by 2 - 5% depending on the angle from horizontal.

Dipoles and inverted vee antennas have a feed point of about 75 ohm's in free space, and can be fed with 52 to 72 ohm coax with or without a 1:1 balum.

This page last revised: 02/19/2007 08:31:39 AM