Development of a low-loss Whispering-Gallery mode filter for the millimeter wave integrated circuits.

本研究的主要结果是针对低损耗毫米波滤波器的研制而进行的，主要内容如下：（1）针对实际的谐振器结构，详细研究了所提出的谐振器与外部电路之间的耦合特性。结果发现，高介电常数介质盘谐振器可以被激发具有良好的效率，通过使用具有的相位常数，这是等于那些的盘的介质波导。(2)设计了一个由两个回音壁模谐振器组成的70 GHz毫米波带通滤波器。在通带效率方面观察到良好的滤波器性能。在500MHz带宽下，插入损耗降低到1.8dB.为了进一步提高滤波器的性能，还需要解决以下问题：（1）抑制通带外的杂散响应。(2)开发了一个用于这种类型过滤器的CAD（计算机辅助设计）系统。

The results of this study which was carried out for development of a low-loss millimeter wave filter are summarized as follows ;(1) The coupling characteristics between the presented resonator and the external circuits are investigated in detail for an actual resonator configuration. It was found that the high permittivity dielectric disk resonator can be excited with a good efficiency by using the dielectric wave guides having the phase constant which is equal to ones of the disk.(2) A millimeter wave bandpass filter which consists of two Whispering-Gallery mode resonators was designed at 70 GHz. A good filter performance was observed in regard to the efficiency in the pass band. The insertion loss was reduced to 1.8 dB in case of 500 MHz bandwidth.In order to improve the presented filter, furthermore, the following subjects remain,(1) Suppression of the spurious responses outside the passband.(2) Development of a CAD (Computer Aided Design) system for this type of filters.