In this letter, a novel packaged linear displacement sensor integrated with inherent bandpass filter (BPF) is presented. The proposed filtering sensor is composed of a multimode resonator (MMR) and a pair of transmission line. Based on the insertion phase shifts, a displacement sensing function can be obtained along with a wideband bandpass filtering response. For verification, a prototype is simulated and measured. The measured results of the proposed sensors are in good agreement with the simulated ones, exhibiting an average phase sensitivity about 14°/mm with a wideband Chebyshev bandpass filtering response centered at 3.2 GHz of 56.7% 3-dB fractional bandwidth (FBW).

中文翻译：

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具有宽带滤波功能的封装微波位移传感器

在这封信中，提出了一种集成了固有带通滤波器（BPF）的新型封装线性位移传感器。所提出的滤波传感器由多模谐振器（MMR）和一对传输线组成。基于插入相移，可以获得位移感测函数以及宽带带通滤波响应。为了验证，对原型进行了模拟和测量。所提出的传感器的测量结果与模拟结果非常一致，表现出约 14°/mm 的平均相位灵敏度，以及以 3.2 GHz 为中心、56.7% 3 dB 分数带宽 (FBW) 的宽带切比雪夫带通滤波响应。