Accession Number : AD0846204

Title :   Absolute Gain Measurements for Horn Antennas

Descriptive Note : Final technical rept. Jan 1967-Jul 1968

Corporate Author : NATIONAL BUREAU OF STANDARDS BOULDER CO RADIO STANDARDS ENGINEERING DIV

Personal Author(s) : Bowman, Ronald R

PDF Url : AD0846204

Report Date : Nov 1968

Pagination or Media Count : 88

Abstract : A detailed discussion is presented of absolute gain measurements by the insertion-loss method (also known as the 'two-antenna' or 'three-antenna' method). The discussion emphasizes error analysis, electrical mismatch, near-zone corrections, swept-frequency gain measurements, and techniques for experimentally reducing the effects of multipath interference. Some simple terms, concepts, and formulas are presented that are useful for the design and evaluation of antenna or field strength measurements when multipath interference is involved. It is concluded that swept-frequency horn-gain measurement with uncertainty limits of less than plus or minus .1 dB can be made on small indoor ranges. Examples of horn-gain measurements are included.

Descriptors :   *HORN ANTENNAS, ANTENNA FEEDS, CORRECTIONS, GAIN, IMPEDANCE MATCHING, MEASUREMENT, MULTIPATH TRANSMISSION, RADIOFREQUENCY INTERFERENCE

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE