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High-Temperature Superconducting Receiving Filter Subsystem for Mobile Telecommunication Base Station
Yoshiki UENO Nobuyoshi SAKAKIBARA Teruaki YAMADA Mitsunari OKAZAKI Masayuki AOKI
IEICE TRANSACTIONS on Electronics
Publication Date: 1999/07/25
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Microwave and Millimeter Wave Technology)
Category: Passive Devices and Circuits
high-temperature superconductor, HTS, filter, filter subsystem, frame error rate,
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High-temperature superconductor (HTS) receiving filter subsystem for mobile telecommunication base station has been developed. An 11-pole HTS filter using YBa2Cu3O7-δ (YBCO) thin films and a low noise amplifier were cooled to 70 K by a small cryocooler. Total noise figure of this subsystem was measured to be 0.5 dB. Furthermore the effect of using the subsystem in the receiver front-end of Code Division Multiple Access (CDMA) cellular base station was investigated. The transmitting power reduction of handy terminal was estimated to be about 35%.