【摘要】 把声表面波 ( SAW)滤波器作为一个网络 ,测出参数 ,通过计算模拟出其最佳的滤波器性能 ,取得较好的匹配参数 ;同时较详细的介绍了复合纵向耦合谐振型 ( CL MR) SAW滤波器的结构 ,给出了 GSM中频用 2 4 6MHz SAW低损耗滤波器的应用实例 ,未匹配的插入损耗为 8.5 7d B,匹配后插入损耗 4 .3 5 d B,通带波纹 0 .4 5 d B。更多还原

【Abstract】 Taking SAW filter as a network,the optimum performance of the filter with good matching parameters is simulated through calculationAlso the CLMR SAW filter is introduced in detailIn practical,246 MHz SAW IF filter has been used in GSM with an insertion loss of 857 dB (before matching) and 435 dB (after matching) respectivelyThe passband ripple is about 045 dB更多还原