Quasi-elliptic bandpass filtering power divider with ultra-wide stopband
Quasi-elliptic bandpass filtering power divider with ultra-wide stopband
复制标题
具有超宽阻带的准椭圆带通滤波功率分配器
DOI：
10.1049/el.2020.0200
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发表时间：
2020
影响因子：
1.1
通讯作者：
Sun Yuancheng
中科院分区：
文献类型：
--
作者：
Wu Chaochao;Xiao Fei;Wang Huadong;Chen Yang;Sun Yuancheng
在这封信中，提出了一种具有二阶准椭圆带通响应的新型滤波功分器，该功分器在通带附近具有两个传输零点，以获得尖锐的频率选择性。此外，由于特定的拓扑结构，它具有超宽阻带的特点。为了演示，滤波功率分配器的例子工作在3.1 GHz的设计，制造和测量。其3 dB分数带宽约为11.9%，两个输出端口之间的带内隔离超过20 dB。具体而言，从通带的上侧到4.8f0实现了超过21 dB的带外抑制，并且至少到20f0实现了超过12 dB的抑制。测量结果与模拟结果吻合较好。
In this Letter, a novel filtering power divider with second‐order quasi‐elliptic bandpass response is proposed, which has two transmission zeros near to the passband for sharp frequency selectivity. In addition, it is featured by ultra‐wide stopband owing to specific topology. For demonstration, a filtering power divider example operating at 3.1 GHz is designed, fabricated and measured. Its 3 dB fractional bandwidth is about 11.9%, and the in‐band isolation between two output ports exceeds 20 dB. Specifically, more than 21 dB out‐of‐band suppression is achieved from the upper side of the passband to 4.8f0, and more than 12 dB suppression is achieved to at least 20f0. The measurement agrees well with the simulation.