High-power high-temperature superconducting microstrip filters for cellular base-station applications
High-power high-temperature superconducting microstrip filters for cellular base-station applications
复制标题
适用于蜂窝基站应用的高功率高温超导微带滤波器
DOI：
10.1109/77.403135
复制
发表时间：
1995
影响因子：
1.8
通讯作者：
D. Oates
中科院分区：
文献类型：
--
作者：
G. Liang;Dawei Zhang;C. Shih;M. Johansson;R. Withers;A. Anderson;D. Oates
我们报道了由YBa/sub 2/Cu/sub 3/O/sub 7/(-x)高温超导薄膜制成的低插入损耗和高功率处理能力的窄带微带滤波器。在LaAlO/sub /衬底上的一个5极滤波器，由后向耦合和前向耦合谐振器组成，可以在10 K时处理超过27 W的输入功率。它具有1%的分数带宽和10-/spl ω /内部阻抗。在10 K时，当输入功率从几mW增加到27 W时，通带的插入损耗增加小于0.25 dB。我们还报道了一种以2ghz为中心的前耦合微带滤波器，其分数带宽为1.2%，ω /内部阻抗为10-/spl，馈线为并联耦合。我们在45 K下对滤波器施加了超过10 /spl的ω /，而没有明显的滤波器性能下降。45k时的插入损耗小于0.2 dB。回波损耗优于12db， <<ETX>>
We report narrowband microstrip filters with low insertion loss and high power-handling capabilities made from YBa/sub 2/Cu/sub 3/O/sub 7/(-x) high-temperature superconducting films. One 5-pole filter on a LaAlO/sub 3/ substrate, consisting of backward-coupled and forward-coupled resonators, can handle over 27 W input power at 10 K. It has 1% fractional bandwidth and 10-/spl Omega/ internal impedance. The insertion loss increase in passband at 10 K, as the input power changed from a few mW to 27 W, is less than 0.25 dB. We also report a forward-coupled microstrip filter centered at 2 GHz, with a 1.2% fractional bandwidth, 10-/spl Omega/ internal impedance, and parallel-coupled feed lines. We applied over 10 /spl Omega/ to the filter at 45 K without noticeable degradation of the filter performance. The insertion loss at 45 K is less than 0.2 dB. The return loss is better than 12 dB.<<ETX>>