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The compact RF assembly with continuous adjustable phase shifter is designed and fabricated for WiMAX BTS antenna. The phase change is obtained by adjusting the length of microstrip delay line and the coupling substrate material. The maximum phase changes 288deg, 363deg, and 454deg between port 1 and port 8 are obtained at frequencies 2.3 GHz, 2.5 GHz, and 2.7 GHz respectively. If the BTS antenna,...
A novel fractal antenna constructed with Hilbert curve and complementary configuration is proposed for UHF RFID tag antenna design in this paper. For the improvement of conventional meander-line RFID tag antenna, the inductive and wideband performance in addition the balun feature of the complementary configuration is presented. The wide-band characteristics of frequency responses, impedance spectrum,...
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