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Article: SWITCHED-COUPLER MEASUREMENTS FOR HIGH POWER RF CALIBRATIONS.
- Article from:
- Microwave Journal
- Article date:
- March 1, 2000
- Author:
CopyrightCOPYRIGHT 2000 Horizon House Publications, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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This article describes the design and operational theory behind a new high power measurement system recently developed at the National Institute of Standards and Technology (NIST). This new system utilizes the established low power bolometer calibration service and extends measurement capability up to 1 kW in the 2 to 1000 MHz frequency range.
In order to meet the demand for higher power calibrations, a new high power measurement system had to be developed. The cascaded-coupler technique, originally discussed by Kenneth Bramall in 1971, [1] was chosen for its ability to achieve an acceptable uncertainty at minimum cost. Specifically, the technique allows the ...