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What are the Different Types of Antennas? The Complete List

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What are the Different Types of Antennas? The Complete List: Generally, there are three large groups of antennas: directions, semi-directional and Omni-directional antenna. Most antennas fall into one of these three groups.

Antennas are elements that can receive or transmit radio waves. Antenna types vary according to the frequency of the radio waves they are designed for, among other things.Generally, there are three large groups of antennas: directions, semi-directional and Omni-directional antenna. Most antennas fall into one of these three groups. Table of Contents Directional AntennaOmni-Directional Antenna: Semi-Directional Antennas:The … Read more

CB Radio Frequencies & Channels (PDF)

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CB Radio has 40 channels with CB radio frequencies ranging from 26.965 to 27.405 MHz. Channels are generally spaced 10 MHz apart. The frequencies are listed in the table below. I have included different sets of channels used by people in various countries around the world.

CB Radio has 40 channels with CB radio frequencies ranging from 26.965 to 27.405 MHz. Channels are generally spaced 10 MHz apart. The CB frequencies are listed in the table below. I have included different sets of channels used by people in various countries around the world. As you can see, these CB radio channels overlap … Read more

The Different Types of Walkie-Talkies Explained

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The Different Types of Walkie-Talkies Explained: The two most common types of walkie-talkies are Family Radio Service (FRS), and General Mobile Radio Service..

There are a number of different types of walkie talkies on the market that offer various features. The two most common types of walkie-talkies are Family Radio Service (FRS), and General Mobile Radio Service (GMRS).  For many years FRS was considered a low power short range system, while GMRS was thought of as high power long … Read more

What is Radio Squelch & Ways to Stop It

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What is Radio Squelch: Squelch is the noise reduction system of a Walkie-talkie. The squelch level is used to control unwanted background noise and prevent false triggering from noise when no one is transmitting.

Ever turned on your walkie-talkie and a very odd and annoying sound come through? This is radio squelch.What does “Squelch” mean?Squelch is the noise reduction system of a Walkie-talkie. The squelch level is used to control unwanted background noise and prevent false triggering from noise when no one is transmitting. It’s important to set the squelch … Read more

Ham Radio APRS – The Complete Guide

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Ham Radio APRS: The complete guide to APRS is the Automatic Position Reporting System - what it is, how it works and why it exists.

APRS is the Automatic Position Reporting System. It uses amateur radio dedicated digital communication to send out your position in real time. There are almost 10,000 APRS users around the world (and growing) using devices like a handheld transceiver, mobile rigs and/or home stations with GPS receivers connected to computer TNCs or built into motherboards to … Read more

Understanding Noise Temperature & Communications Relation

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Understanding Noise Temperature & Communications Relation: The term Noise Temperature has two rather simple yet distinct meanings in the RF community. This article focuses on its use as a measurement of noise power, whereas another post will explore how it relates to wireless link performance.

The term Noise Temperature has two rather simple yet distinct meanings in the RF community. This article focuses on its use as a measurement of noise power, whereas another post will explore how it relates to wireless link performance. Conceptually, Noise Temperature is not much different than other temperature scales we are familiar with (Celsius, Fahrenheit). … Read more

What are Cavity Filters & How Do They Work?

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What are Cavity Filters & How Do They Work?: A cavity filter is a form of a resonant circuit that allows only specific frequencies to go through. Notch filters, in general, are the type of filter discussed here.

A cavity filter is a form of a resonant circuit that allows only specific frequencies to go through. Notch filters, in general, are the type of filter discussed here. “Cavity” is just a name for the space inside of the filter that traps or releases energy. Applications of Cavity Filters: Cavity filters are perfect for a multitude of … Read more