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A novel three-way microstrip line power divider structure using branch directional coupler is presented. The power divider is formed by two symmetrically placed branch directional couplers. The transmission characteristics of the power divider have been modeled and analyzed by using even/odd modes excitation method as well as transmission line theory. This paper also gives the design method on how...
A novel compact tapered microstrip slot antenna has been developed for microwave breast imaging. The antenna is designed assuming that it will be embedded in breast tissues rather than air. By using a microstrip tapered slot with a fork-shaped feeding structure, the designed antenna has achieved a good matching performance at 2 to 8 GHz. The total size of the antenna is only 0.13λ × 0.13λ at the lowest...
A microwave imaging system prototype has been developed for early breast cancer detection. The system is based on impulse Ultra-Wideband (UWB) radar technology. A novel, practical calibration method has been applied in our system to remove the large received signals due to both skin backscattering and Tx/Rx antenna coupling, and to underline the reflection/scattering from object of interest. This...
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