O'Reilly logo

Low-Visibility Antennas for Communication Systems by Albert Sabban

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Chapter 11

Radio Frequency Measurements

11.1 Introduction

S-parameter measurements are the first stage in electromagnetics and antenna measurements. It is more convenient to measure antenna measurements in the receiving mode. If the measured antenna is reciprocal the antenna radiation characteristics are identical for the receiving and transmitting modes. Active antennas are not reciprocal. Radiation characteristics of antennas are usually measured in the far field. Far-field antenna measurements suffer from some disadvantages. A long free space area is needed. Reflections from the ground from walls affect measured results and add errors to measured results. It is difficult and almost impossible to measure the antenna on the antenna operating ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required