SAW waveguide-coupled resonator notch filter
SAW waveguide-coupled resonator notch filter
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DOI：
10.1109/ultsym.1990.171317
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发表时间：
1990-12
期刊：
影响因子：
--
通讯作者：
S. Gopani;B.A. Horine
中科院分区：
文献类型：
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作者：
S. Gopani;B.A. Horine
提出了一种在全通网络中使用两极波导耦合(WGC)谐振器的SAW(表面声波)陷波滤波器的独特实现方法。与单极方法相比，这种配置在缺口的带宽方面有了显著的改善。详细讨论了双极子WGC谐振器设计的应用，给出了193 MHz双极子设计的结果。介绍了一种193 MHz的级联四阶谐振器陷波滤波器，其通带损耗小，宽带陷波深度大于40分贝。这种陷波滤光片显示出易于调谐，并表现出良好的温度特性。
A unique implementation of a SAW (surface acoustic wave) notch filter using a two-pole waveguide-coupled (WGC) resonator in an allpass network is presented. This configuration exhibits a dramatic improvement in the bandwidth of the notch over the single-pole approach. This application of the two-pole WGC resonator design is discussed in detail, and results of a two-pole design at 193 MHz are presented. A cascaded four-pole resonator notch filter at 193 MHz with low passband loss and broadband notch depth greater than 40 dB is demonstrated. This notch filter is shown to be easy to tune, and exhibits excellent temperature characteristics.>