实用化静磁表面波带通滤波器研究

根据静磁表面波的基本理论建立了静磁表面波带通滤波器的设计模型 ,以实用化的静磁表面波带通滤波器为目标 ,重点考虑了静磁表面波带通滤波器的中心频率与带宽控制问题 .依据模型对滤波器进行了设计、制作和测试 .实际制作的滤波器性能指标为 :中心频率调谐范围为 4 .2～ 5 .2GHz、3dB带宽 180MHz± 6MHz、插损 11dB左右、带外抑制大于 30dB ,与理论设计结果基本一致 ,从而得到了实用化静磁表面波静磁波带通滤波器的原形 .进一步提高器件的中心调谐频率 ,在毫米波段将有广阔的发展前景 .

STUDY ON PRACTICAL MAGNETO-STATIC SURFACE WAVE BAND-PASS FILTER

The designing model of magneto-static surface wave (MSSW) band-pass filter was established according to the MSSW fundamental theory. Based on the model and putting emphasis on center frequency and bandwidth control, the filter was devised, made and tested with the view of practical MSSW filter. The performance of the filter manufactured is in accordance with the theoretical designing with center frequency from 4.2GHz～5.2GHz, bandwidth 180MHz 6MHz at level-3dB, insertion loss 11dB and suppression of side bands more than 30dB, Thus, the practical MSSW filter prototype has been obtained. By raising the center frequency further, the technique will have broad prospect in the millimeter bands.