Miniature Filter and Microwave Bandpass Filters Constructed with Symmetrical or Asymmetrical Compact Microstrip Resonators

• Main Authors: Wei-Lin Hsieh, 謝蔚霖
• Other Authors: Yi-Chyun Chiang
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/69784111348994491807

碩士 === 長庚大學 === 電子工程研究所 === 94 === The thesis is composed of two part. The first study present a Ku-band bandpass filter designed and fabricated with a commercial CMOS technology. The filter utilizes a π-network coupling structure to construct the desired coupling and the resonant tanks on Si substrate with a compact size and the low-loss performance. A 17GHz filter chip was fabricated by 0.18μm CMOS technology. The size of filter is 0.56mm×0.6mm and the measured pass-band insertion loss of filter is about 3.2dB. The second study present a method of synthesizing microwave filters consisting of compact microstrip resonators (CMR). The synthesizing method is based on the conventional insertion-loss design method and can be applied to the design of filters consisting of symmetrical and asymmetrical CMR (ACMR). A new type of CMR layout is proposed to suppress the spurious passband response and applied to the implementation of a Ku-band filter. The measurement of the prototype shows about 1.5-dB insertion loss in the passband and a rejection greater than 40 dB at the specified frequencies. Besides, an ACMR filter operated at Ku-band was also designed and fabricated. The measurement result is also close to the computer simulation result. This demonstrates the effectiveness of the proposed design concept.