Measuring Techniques for the Calibration of Standard Gain Horn Antennas
OHIO STATE UNIV COLUMBUS ELECTROSCIENCE LAB
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The main objective of this study is to accurately determine the far- field gain of microwave horn antennas from measured, on-axis, near-field coupling. In order to determine the gain, it is important to first locate the amplitude center of each horn antenna. Two methods of determining far-field horn antenna gain are presented. Both involve determining the amplitude center location. The first method involves only simple calculations based on measured coupling and Friis transmission formula. The second method is more complicated but results in more accurate gain calculations, especially for larger horns. This second method is based on measured coupling, Friis transmission formula, and theoretical near-field corrections. Included is a chapter on accurate coupling measurement techniques as well as a chapter on on principal plane radiation patterns of horn antennas.
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