| Título: | Compact Reflectometers for a Wideband Microwave Breast Cancer Detection System |
| Autores: |
Bialkowski, Marek; The University of Queensland Seman, Norhudah; The University of Queensland Abbosh, Amin; The University of Queensland Khor, Wee Chang; The University of Queensland |
| Fecha: | 2006-10-03 |
| Publicador: | African Journal Of Information & Communication Technology |
| Fuente: |
 |
| Tipo: |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
| Tema: | Cancer detection, microwave imaging, experimental verification, near field |
| Descripción: | 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. |
| Idioma: | Inglés |
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