Referenced Items are not available for this document.
A new magnetoresistive sensor for use in medical RF heating and hyperthermia is presented. This sensor has dc output proportional to RF power absorbed in tissue. The operating principle of the sensor consists of multiplication of the instantaneous value of the RF current and voltage in a microstrip transmission line using a magnetoresistive element. At an operating frequency of 915 MHz in a 20% bandwidth, it has a sensitivity of 22 μV/W, insertion losses less than 0.1 dB and nonlinearity less than 3% up to 300 W. The uncertainty caused by the reflected waves with arbitrary phase is less than 3.5% up to the voltage standing wave ratio (VSWR) equals 3
Published in:
Instrumentation and Measurement, IEEE Transactions on
(Volume:49
,
Issue:
3
)
Date of Publication: Jun 2000
- Page(s):
- 513 - 516
- ISSN :
- 0018-9456
- INSPEC Accession Number:
- 6653986
- Digital Object Identifier :
- 10.1109/19.850386
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 06 August 2002
- Issue Date :
- Jun 2000
- Sponsored by :
- IEEE Instrumentation and Measurement Society
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