Tsuboi, Yusei and Ibrahim, Zuwairie and Ono, Osamu (2006) Compact reflectometers for a wideband microwave breast cancer detection system. African Journal of Information & Communication Technology, 2 (3). pp. 119-124. ISSN 1449-2679
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Official URL: http://epress.lib.uts.edu.au/ojs/index.php/ajict/a...
The design of compact wideband microwave reflectometers for the purpose of inclusion in a breast cancer detection system is presented. In this system, a wideband frequency source is used to synthesize a narrow pulse via the step-frequency synthesis method. The reflectometer undertakes measurements in the frequency domain and the collected data is transformed into the time/space domain using IFFT. In order to accomplish reflection coefficient measurements over a large frequency band, compact wideband couplers and power dividers are used to form the reflectometer. Two compact six-port reflectometer configurations are investigated. One uses the Lange coupler and the Gysel power divider and the other one employs a 3dB slot-coupled microstrip coupler and a 2-stage Wilkinson power divider. The reflectometer employing the slot-coupled coupler and the Wilkinson divider provides a wider operational bandwidth, as shown by simulation results performed with Agilent ADS
|Uncontrolled Keywords:||wideband microwave reflectometers, slot-coupled coupler|
|Subjects:||T Technology > TK Electrical engineering. Electronics Nuclear engineering|
|Deposited By:||INVALID USER|
|Deposited On:||25 Mar 2009 07:33|
|Last Modified:||01 Apr 2009 08:39|
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