A high-temperature superconducting （HTS） filter subsystem consisting of a 10-pole HTS filter with group delay self-equalization, a cryogenic low noise amplifier （LNA）, and a cooling device is presented in this pap...A high-temperature superconducting （HTS） filter subsystem consisting of a 10-pole HTS filter with group delay self-equalization, a cryogenic low noise amplifier （LNA）, and a cooling device is presented in this paper. The HTS filter has a 0.51% fractional bandwidth at 1955 MHz, simulated in Sonnet, and is fabricated using double-sided TI2Ba2CaCu208 films on 0.5 mm thick LaAIO3 substrate. Measured responses show that the minimum insertion loss of the filter is 0.16 dB, and the out-of-band rejection is better than 75 dB. The slope is 27 dB MHz^-1 at the low band edge and 22 dB MHz-1 at the upper band edge. The HTS filter subsystem has a gain of 19.3 dB and a noise figure （NF） of 0.8 dB. Furthermore, the phase distortion of HTS filters is considered, and an efficient design approach for self-equalized HTS filters is proposed.展开更多
The first HTS front-end subsystem for wireless base station in China was developed. This demonstration system, which aims at the application in GSM1800 mobile communication base station, consists of a single RF path, ...The first HTS front-end subsystem for wireless base station in China was developed. This demonstration system, which aims at the application in GSM1800 mobile communication base station, consists of a single RF path, i.e. one filter and one LNA, integrated with the pulse tube cooler. The subsystem works at a pass band of 1710-1785 MHz with a gain of 18 dB and at a temperature of 70 K. The accomplishment of such a demonstration subsystem can boost the development of HTS commercial subsystem.展开更多
基金Supported by the Major State Basic Research Development Program of China (973 Program) (Grant No. 2006CB601006)the National High Technology Research and Development Program of China (863 Program) (Grant No. 2006AA03Z213)
文摘A high-temperature superconducting （HTS） filter subsystem consisting of a 10-pole HTS filter with group delay self-equalization, a cryogenic low noise amplifier （LNA）, and a cooling device is presented in this paper. The HTS filter has a 0.51% fractional bandwidth at 1955 MHz, simulated in Sonnet, and is fabricated using double-sided TI2Ba2CaCu208 films on 0.5 mm thick LaAIO3 substrate. Measured responses show that the minimum insertion loss of the filter is 0.16 dB, and the out-of-band rejection is better than 75 dB. The slope is 27 dB MHz^-1 at the low band edge and 22 dB MHz-1 at the upper band edge. The HTS filter subsystem has a gain of 19.3 dB and a noise figure （NF） of 0.8 dB. Furthermore, the phase distortion of HTS filters is considered, and an efficient design approach for self-equalized HTS filters is proposed.
基金This work was supported by the Chinese Academy of Sciences (Project No. KJCX2-SW-W01)Commission of Science and Technology of Beijing (Project No. H010410050111).
文摘The first HTS front-end subsystem for wireless base station in China was developed. This demonstration system, which aims at the application in GSM1800 mobile communication base station, consists of a single RF path, i.e. one filter and one LNA, integrated with the pulse tube cooler. The subsystem works at a pass band of 1710-1785 MHz with a gain of 18 dB and at a temperature of 70 K. The accomplishment of such a demonstration subsystem can boost the development of HTS commercial subsystem.
