报道了带宽为10MHz,80%以上带宽内群时延失真小于20ns的高温超导线性相位滤波器.该滤波器制作于LaAlO3衬底上,采用了一种新的谐振器结构以消除寄生耦合的影响,使得滤波器不仅具有很好的线性相位特性,而且具有对称的幅频响应特性.滤波器实测带宽为9.85MHz,回波损耗约16dB,带外抑制大于80dB,群时延失真(80%以上带宽内)约20ns,其他实测指标也与仿真结果符合很好. Reported a high-temperature superconducting linear phase filter with a group delay distortion of less than 20ns in bandwidth of 10MHz and over 80% bandwidth.The filter was fabricated on a LaAlO3 substrate using a new resonator structure to eliminate parasitic coupling The filter has a measured amplitude-frequency response of 9.85MHz, a return loss of about 16dB, an out-of-band rejection of more than 80dB, a group delay distortion of 80% More than the bandwidth) about 20ns, other measured indicators are in good agreement with the simulation results.