Precision Microwave Attenuation Measurement by Time Interval Ratio,
Abstract
A method of measuring microwave attenuation by substitution is described. As attenuation is inserted into the device under test, the pulse repetition frequency of a pulse modulated PIN diode switch in series with the device is changed to maintain a constant mean power output from the circuit. The ratio of the pulse repetition frequencies before and after insertion is shown to be simply related to the attenuation of the device under test. Sources of error are examined in detail and results are quoted showing inaccuracies of less than + or - 0.002 dB over a range of 0 to 20 dB. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1985
- Accession Number
- ADA154791
Entities
People
- P. Cummings
- Richard H. Johnson
Organizations
- Royal Signals and Radar Establishment