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FAR-FIELD
ANTENNA MEASUREMENTS
WITH THE
HP 8510 NETWORK ANALYZER
John W. Boyles
Network Measurements Division
1400 Fountain Grove Parkway
Santa Rosa, CA 95401
RF & Microwave
Measurement
Symposium
and
Exhibition
r/ifl'l HEWLETT
~~ PACKARD
www.HPARCHIVE.com
ABSTRACT:
This paper describes the application of the HP 8510 network analyzer to far-field
antenna measurements. Several hardware configurations are described, including a
newly developed configuration for making antenna measurements using harmonic
mixers. Short-distance, long-distance, and radar cross-section ranges are described,
and measurement examples are given for each category.
In addition, the paper discusses the use of time domain gating as a means of
eliminating the effects of ground path reflection, which is one of the major prob-
lem areas encountered in far-field antenna measurements. Several measurement
examples are given that show the improvements that can occur using gating.
Author: John W. Boyles, Applications Engineer, Hewlett-Packard Network Measure-
ment Division, Santa Rosa, CA. He received a BS degree from North Carolina
State University in 1978 and a MS degree from the Georgia Institute of Technology
in 1979, both in electrical engineering. With HP since 1979, he joined as a R&D
engineer doing microwave and analog circuit design, and was one of the designers
of the HP 8340A synthesized sweeper. In 1984, he became an applications engineer
for the high performance network analyzers, specializing in the areas of time do-
main network measurements, and antenna and radar cross-section measurements.
www.HPARCHIVE.com
This paper describes the application of the
HP 8510 Network Analyzer to far-field
antenna measurements.
FAR-FIELD
ANTENNA MEASUREMENTS
WITH THE
HP 8510 NETWORK ANALYZER
4445
The HP 8510 network analyzer is a high
performance stimulus/response measurement
system that consists of a microwave
source, a test set, and the HP 8510A as
receiver and system controller. There are
several different measurement configura-
tions available that can be customized to
specific applica tions. Shown in this pic-
ture are the HP 8510A network analyzer,
HP 8511A Frequency Converter, and HP
8340A Synthesized Sweeper.
4446
The HP 8510 can be configured as a 4-
input phase locked receiver that is capable
HP 8510 CAPABILITY of measuring magnitude and phase. For
FOR ANTENNA TESTING antenna testing, its broadband performance
and wide dynamic range make it applicable