Electron spin resonance spectrometer
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United States of America Patent
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Feb 7, 1989
Grant Date -
N/A
app pub date -
Jul 14, 1987
filing date -
Sep 19, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An electron spin resonance spectrometer is disclosed which includes a sample and a reference arm (16, 18). The sample arm has a circulator (30) for directing radiation to a resonator (22) in which a sample for analysis is deposited and for receiving radiation from the resonator and directing it to a detector (32). The detector detects the microwave radiation from the sample and reference arms (16, 18) to determine a property or properties of said sample. The sample arm (16) and said reference arm (18) are formed as an integrated microwave bridge which includes a divider (14) having a first output portion coupled to an attenuator (20), said attenuator being coupled to said circulator (30) by a microwave transmission line (110). The circulator (30) is coupled to at least one output by a second microwave transmission line (124). The divider (14) has a second output portion coupled to a phase shifter (36), said phase shifter including a second circulator (73) and a second attenuator (38) including a third circulator (81), said second circulator (73) being coupled to said third circulator (81) by a third microwave transmission linne (80), a fourth microwave transmission line (90) coupling an output of said third circulator (81) to at least one second output.
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