Johnson's Techworld

What are dB, dBi, dBd, and dBm Gains in Amateur Radio? Decibel is a unit which most of us are familiar in case of intensity of sound. It

Can You Use D-Star Amateur Radio in Android Phone? D-STAR stands for Digital Smart Technologies for Amateur Radio, a digital voice and data protocol specification for amateur radio

Small Magnetic Loop Antenna Small magnetic loop antennas can be used both indoors and outdoors. They are cheap, easy to build antennas which have been used for even

What is a Remote Antenna Tuner in Amateur Radio? Antenna tuners are used to match the output impedance of the radio to that of the antenna. Most modern

Different Types of Monopole Antennas Several types of monopole antennas are used for radio transmissions, both amateur and professional. The tall tower antennas often seen near medium wave

What is D-STAR in Amateur Radio? D-STAR stands for Digital Smart Technologies for Amateur Radio. It is a digital voice and data protocol specification for amateur radio developed

Parabolic Reflector Antenna All of you would have seen the dish antennas on roof tops being used for direct to home satellite television reception. They are parabolic reflector

What is a Helical Antenna? Helical antenna, as the name implies, is an antenna in which one or more conducting wires are wound in the form of a

What is a Log-periodic Antenna in Amateur Radio? Log-periodic antennas are typically used for VHF and UHF frequencies. There are radio amateurs who have built it for 20-6m

What is a Bazooka Balun? Balun stands for balanced line to unbalanced line, typically connected between a balanced antenna and an unbalanced feeder coaxial cable. Bazooka balun is