【摘要】：提出了一種具有多個傳輸零點的高溫超導(dǎo)濾波器小型化設(shè)計方法。該濾波器由十個慢波交叉指結(jié)構(gòu)諧振器和三個自均衡CQ跨線結(jié)構(gòu)組成,其中一個CQ結(jié)構(gòu)通過產(chǎn)生一對實軸上的傳輸零點實現(xiàn)相位均衡,另外兩個CQ結(jié)構(gòu)通過產(chǎn)生兩對虛軸上的傳輸零點實現(xiàn)濾波器的高頻率選擇性。濾波器中心頻率為1,720MHz,帶寬為10MHz,通帶外陡峭度為40d B/MHz,通帶內(nèi)回波損耗為23d B,且在60%的通帶內(nèi)具有平坦的群時延響應(yīng)。在Mg O襯底上采用DBCO高溫超導(dǎo)薄膜制作十階超導(dǎo)濾波器,并在77K溫度下進(jìn)行測試,最終得到了良好的帶外抑制性能和平坦的群時延特性。測試結(jié)果與仿真結(jié)果基本一致,說明所提出的設(shè)計方法是有效的。
[Abstract]:A miniaturization design method for HTS filters with multiple transmission zeros is presented. The filter consists of ten slow-wave cross-finger resonators and three self-equalization CQ cross-line structures. One of the CQ structures realizes phase equalization by generating a pair of transmission zeros on the real axis. The other two CQ structures achieve high frequency selectivity by generating transmission zeros on two virtual axes. The center frequency of the filter is 1720MHz, the bandwidth is 10MHz, the out-of-band steepness is 40dB / MHz, the return loss is 23dB, and the group delay response is flat in 60% of the passband. Ten order superconducting filters were fabricated on Mg O substrates by DBCO high temperature superconducting thin films and tested at 77K. Finally, good out-of-band suppression performance and flat group delay characteristics were obtained. The test results are in good agreement with the simulation results, which shows that the proposed design method is effective.
【作者單位】： 南開大學(xué)電子信息與光學(xué)工程學(xué)院;
【基金】：國家自然科學(xué)基金(61471208) 天津市自然科學(xué)基金(15JCYBJC46900)資助
【分類號】：TN713

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