Wang Lei, Bai Mengke, Xu Jun
The 54th Research Institute of CETC, Shijiazhuang 050081, China.
School of Physics, University of Electronic Science and Technology of China, Chengdu 611731, China.
Micromachines (Basel). 2025 Feb 21;16(3):247. doi: 10.3390/mi16030247.
This paper presents a waveguide bandpass filter that integrates bending and twisting functions, utilizing mixed TE and TE mode resonators. Benefiting from the mixed utilization of TE and TE resonators, the desired stopband suppression and low insertion loss are achieved. To verify the feasibility of this approach, a sixth-order Chebyshev bandpass filter centered at 20.4 GHz is designed, with a bandwidth of 1.6 GHz (FBW = 7.84%) and a return loss of more than 20 dB. The filter also achieves 120° bending in the propagation direction and 90° rotation in polarization. This prototype is fabricated following the stereolithography (SLA) process using photosensitive resin, followed by metallization through electroplating to achieve a lightweight design. The measurements exhibit great consistency with the simulations.
本文提出了一种集成弯曲和扭转功能的波导带通滤波器，该滤波器利用混合TE和TE模式谐振器。受益于TE和TE谐振器的混合使用，实现了所需的阻带抑制和低插入损耗。为了验证该方法的可行性，设计了一个中心频率为20.4 GHz的六阶切比雪夫带通滤波器，带宽为1.6 GHz（分数带宽FBW = 7.84%），回波损耗大于20 dB。该滤波器还在传播方向上实现了120°弯曲，在极化方向上实现了90°旋转。该原型采用立体光刻（SLA）工艺，使用光敏树脂制造，然后通过电镀进行金属化处理，以实现轻量化设计。测量结果与仿真结果具有高度一致性。
