Determining resonant frequency was proposed for the bandpass filter using single dual-mode resonator. Because a coupling coefficient implied the information which is the position of poles for the bandpass filter, the resonant frequencies (ƒe, ƒm) were obtained through the equivalent circuit analysis and the simple calculation. Furthermore, the frequencies were determined to even- and odd-mode resonant frequency proper for the position of the transmission zero (at a lower or upper stopband). To verify the theory, the filter example was demonstrated and its measured result was suitable for the required frequency response. Therefore, we expect that the theory will be used to design the bandpass filter using the single dual-mode resonator.
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机译：建议使用单个双模谐振器的带通滤波器确定谐振频率。因为耦合系数暗示作为带通滤波器的极点位置的信息，所以通过等效电路分析获得谐振频率（ƒ e ，ƒ m ）简单的计算。此外，将频率确定为偶数和奇数模式谐振频率，用于发送零的位置（在较低或上部停留）上。为了验证理论，证明了过滤器示例，其测量结果适用于所需的频率响应。因此，我们预计该理论将用于使用单个双模谐振器设计带通滤波器。
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