Antennas and Antenna Concepts

Basic antenna concepts with illustrations and explanations

Download What is an antenna? These pages explains Antennas, Antenna Types and Antenna Concepts. All the pages can be downloaded as PDF here. An antenna is a transducer An antenna is a transducer, i.e. a ”converter” between two media.		ANTENNA CONCEPT PAGES
		Tech Info - main page Antenna Concepts - main page Antenna Types Base Station Antennas Antennas for Mobile Units How to describe how good an antenna is? How to measure how good an antenna is? Measuring SWR Measuring Gain Measuring BW Download all pages about Antenna Concepts

The antenna converts electromagnetic energy in a cable into electromagnetic radiated power in free space. Various characteristics of the antenna determine ”how efficient” this conversion is performed: To have as much energy as possible carried on as radiation in the room is of great importance, i.e. the antenna should not be capable of consuming energy itself. It is important that the antenna concentrates its radiated energy as efficiently as possible in the required way. If so, either a wide coverage range or a reduced transmitting power can be achieved, until the range is exactly suiting the one required.

The antenna converts electromagnetic energy in a cable into electromagnetic radiated power in free space

Omnidirectional Antenna

Directional Antenna

Consequently, antenna technology is simply a question of economizing on the energy.

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