T形贴片双模微带带通滤波器

基于传统的T形贴片双模微带带通滤波器,提出了一种新型的加入缝隙耦合的T形双模微带带通滤波器。在T形贴片谐振器的两侧以缝隙耦合的方式插入馈线,并对其进行了优化。优化后的滤波器能在通带两侧都产生衰减极点,提高了阻带的抑制能力,对其进行了仿真。仿真结果表明,该滤波器通带的中心频率为5.0 GHz,与实测结果基本一致,滤波器尺寸为34 mm×24 mm,保证了滤波器的小型化。

T-shaped patch dual-mode microstrip bandpass filter

Based on the traditional T-shaped patch dual-mode microstrip bandpass filter,a new T-shaped patch dual-mode microstrip bandpass filter by joining gap coupling was put forward.The feed lines were inserted on both sides of the T-shaped patch resonators as way of gap coupling.The filter could produce attenuation poles in the passband on both sides and improve the stopband rejection after optimum.The filter was simulated.The simulating results show that the passband center frequency is 5.0 GHz which is confirm with the experimental test results.The size of the filter is 34 mm×24 mm,ensuring miniaturization.