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Before we can design an antenna or discuss antenna types, we must understand the basics of antennas, which are the fundamental parameters that characterize an antenna. So let us learn something. We'll start with frequency and step through radiation patterns, directivity and gain, and ultimately close with an explanation on why antennas radiate.
- Frequency
Frequency is one of the most important concepts in the...
- Radiation Pattern
A radiation pattern defines the variation of the power...
- Field Regions
In the immediate vicinity of the antenna, we have the...
- Directivity
A normalized radiation pattern is the same as a radiation...
- Antenna Efficiency
Antenna efficiency is also frequently quoted in decibels...
- Antenna Gain
The gain of a real antenna can be as high as 40-50 dB for...
- Beamwidths and Sidelobes
In addition to directivity, the radiation patterns of...
- Impedance
Antenna impedance relates the voltage to the current at the...
- Frequency
An intuitive tutorial of antennas and antenna theory. This website is designed to present a comprehensive overview of antennas, from design, to measurement and theory. Unnecessarily complicated math is avoided throughout.
Before we can design an antenna or discuss antenna types, we must understand the basics of antennas, which are the fundamental parameters that characterize an antenna. So let us learn something. We'll start with frequency and step through radiation patterns, directivity and gain, and ultimately close with an explanation on why antennas radiate.
This is a professional level, introductory text on antenna principles, design, analysis, and measurements. It is especially suitable for persons who wish to improve their knowledge of antenna principles, concept design, performance analyses, and measurements.
24 sie 2016 · Antennas are used to transmit and receive electromagnetic energy. This article covers basic antenna theory.
The Basics. Ward Silver NØAX. Antennas radiate (or receive) because electrons are accelerated (or are caused to accelerate) in the antenna’s elements. Radio or electromagnetic waves are both an E- (electric) and H- (magnetic) field. Electrons move parallel to E-fields. Strongest radiation from accelerating electrons linearly (back and forth)
Basic Antennas is a comprehensive introduction to antennas—basic concepts, practical designs, and details of easy-to-build antennas. You’ll learn how to make antennas that really work! This book will provide a foundation in antenna theory and design necessary for anyone under-taking more advanced topics.
