Performance of high-temperature superconducting band-pass filters with high selectivity for base transceiver applications of digital cellular communication systems
作者： J S Kwak , J H Lee , C O Kim , J P Hong , S K Han
DOI: 10.1088/0953-2048/15/7/328
关键词:
摘要: Highly selective high-temperature superconducting band-pass filters based on spiral meander line structures have been developed for base transceiver station applications of digital cellular communication systems. The filter comprised 12-pole microstrip resonators with a circuit size 0.5 × 17 41 mm3. was designed to bandwidth 25 MHz at centre frequency 834 MHz. Particularly, the physical each resonator chosen not only reduce far-field radiation, but also reasonable tunability in filter. Device characteristics exhibited low insertion loss 0.4 dB 0.2 ripple and return better than 10 pass-band 65 K. out-of-band signals were attenuated 60 about 3.5 from lower band edge, 3.8 higher edge.
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