Abstract

The design of a multilayer bandpass filter has been investigated, in which each of the half-wavelength resonators consists of two dielectric layers with outer strip conductor gratings in the form of square grids and inner ones in the form of square patches. The grids serve as mirrors with specified reflective properties, which ensure optimal couplings of the outer resonators with free space and optimal coupling between the resonators. The patch gratings make it possible to tune the resonator eigenfrequency during the filter synthesis. The efficiency of the quasi-static calculation of the frequency response for the layered structure is shown for the case of a lattice period smaller than the wavelength in the dielectric and much smaller than the layer thickness. Since the calculation does not require much computing power, the parametric synthesis of the device can be performed on a conventional personal computer. The measured characteristics of the prototype of the synthesized third-order filter with a fractional passband width of ∼10% and a central passband frequency of ∼10.6 GHz are in good agreement with the calculation. The proposed design allows one to fabricate multilayer panels radio transparent in a certain frequency band for hiding microwave antennas.

中文翻译：

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基于介电层的带通滤波器，介电层在其界面处具有条状导体亚波长光栅

摘要

已经研究了多层带通滤波器的设计，其中每个半波长谐振器都由两个介电层组成，介电层的外部带状导体光栅为方格形式，内部带状导体光栅为方片形式。栅格用作具有特定反射特性的反射镜，可确保外部谐振器与自由空间的最佳耦合以及谐振器之间的最佳耦合。贴片光栅可以在滤波器合成期间调谐谐振器本征频率。对于晶格周期小于电介质中的波长并且远小于层厚度的晶格周期的情况，示出了对于层状结构的频率响应的准静态计算的效率。由于计算不需要太多的计算能力，设备的参数综合可以在常规的个人计算机上执行。合成的三阶滤波器原型的测量特性，其通带宽度约为10％，中心通带频率约为10.6 GHz，与计算结果非常吻合。所提出的设计允许人们制造在某一频带内对无线电透明的多层板，以隐藏微波天线。