COMMUNICATIONS MATH
Compliments of Firestik® Antenna Company Technical Support Team
Copyright © 1996 Firestik® Antenna Company
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There are numerous formulas and equations that pertain to the communications business. Many of these are very complex and probably beyond the primary (majority) of hobbiest. We will start this page with some of the basic math concepts. You might find some of these helpful, or just interesting. In any case, we will continue to add that which we think may be of further use to you. Your suggestions and recommendations are always welcome. You can e-mail them to us by clicking on the e-mail hyperlink found at the bottom of this document. I know the frequency of my transmitter. What is the wavelength? In meters: 300 divided by frequency in MHz In feet: 984 divided by frequency in MHz In inches: 11,811 divided by frequency in MHz.
I know the wavelength of my transmission. What is the frequency? 300 divided by wavelength in meters equals frequency in MHz. Example, What frequency has a 6 meter wave length? 300 divided by 6 equals 50 MHz.
I want to build a straight wire antenna. How do I calculate the length I need? Full wave: 984 divided by frequency in MHz equals the length in feet Three-quarter wave: 738 divided by frequency in MHz equals the length in feet Five-eighths wave: 615 divided by frequency in MHz equals the length in feet One-half wave: 492 divided by the frequency in MHz equals the length in feet One-quarter wave: 246 divided by the frequency in MHz equals the length in feet
What is the formula for converting meters to feet? Meters multiplied by 3.281 equals an equivalent length in feet.
What is the formula for converting feet to meters? Feet multiplied by 0.3048 equals an equivalent length in meters.
What are some other common conversion formulas? Inches multiplied by 25.4 equals an equivalent length in millimeters. Inches multiplied by 2.54 equals an equivalent length in centimeters. Inches multiplied by 0.0254 equals an equivalent length in meters. Millimeters multiplied by 0.03937 an equivalent length in inches. Meters multiplied by 39.37 equals an equivalent length in inches.
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Updated 2023.12.07