Compact Tunable Filtering Power Divider With Constant Absolute Bandwidth
Compact Tunable Filtering Power Divider With Constant Absolute Bandwidth
复制标题
具有恒定绝对带宽的紧凑型可调谐滤波功率分配器
DOI：
10.1109/tmtt.2015.2454731
复制
发表时间：
2015-10-01
影响因子：
4.3
通讯作者：
Xue, Quan
中科院分区：
文献类型：
--
作者：
Gao, Li;Zhang, Xiu Yin;Xue, Quan
提出了一种具有恒定绝对带宽和高选择性的新型捷变滤波功分器。该设计利用四个耦合谐振器来实现功率分配和滤波两个功能。对滤波功分器进行了综合，给出了设计准则。然后将变容二极管加载到谐振器以实现频率调谐。通过使用电容器以及磁和电耦合来获得所需的外部品质因数和耦合系数，在调谐频率时保持恒定的绝对带宽。为了验证所提设计的有效性，制作了一个电路。实验结果表明，工作频率可在0.62~0.85 GHz范围内变化，3分贝绝对带宽为60±2.5 MHz。此外，在通带附近产生传输零点，从而为每个调谐状态带来高选择性。给出了测量结果与模拟结果的比较，并观察到了良好的一致性。
This paper presents a novel frequency-agile filtering power divider with constant absolute bandwidth and high selectivity. The proposed design utilizes four coupled resonators to obtain the two functions of power division and filtering. Synthesis of the filtering power divider is carried out and the design guidelines are given. Varactors are then loaded to the resonators to enable frequency tuning. By using capacitors as well as magnetic and electric coupling to obtain required external quality factors and coupling coefficients, a constant absolute bandwidth is maintained when tuning the frequency. To demonstrate the validity of the proposed design, a circuit was fabricated. Experimental results show that the operating frequency can be changed from 0.62 to 0.85 GHz with the 3-dB absolute bandwidth of 60 ± 2.5 MHz. Moreover, transmission zeros are generated near the passband, resulting in high selectivity for each tuning state. Comparisons between the measured and simulated results are presented and good agreement is observed.