Hong, Jia-Sheng

Qian, Shilong

English

Miniature wideband bandpass filters are proposed using multilayer liquid crystal polymer (LCP) technology to coverthe very low-frequency band of 0.5–2 GHz. To reduce the filtersize at such low frequencies, lumped-element theory is used for the filter design and a value extraction process is developed to accurately get the capacitive or inductive values of different multilayer microstrip quasi-lumped elements. These elements are used to produce the required filter response, and thus the overall design process relies less on the time-consuming EM optimization. A filter with the size is demonstrated as an initial design. To further improve the stopband performance, an improved design is then developed while still maintaining thecompact sizes within . Both filters are fabricated on a five-metal layer LCP construction, which has not been done before, with robust via connections using the newly developed laser-aided fabrication technique. Good agreements between simulation and fabrication are observed, which has proven both the success of the design methodology, as well as the fabrication technique

Heriot Watt Pure

Miniature Quasi-Lumped-Element Wideband Bandpass Filter at 0.5–2-GHz Band Using Multilayer Liquid Crystal Polymer Technology

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Shilong Qian

Jiasheng Hong

Crossref

IEEE Transactions on Microwave Theory and Techniques

Miniature Quasi-Lumped-Element Wideband Bandpass Filter at 0.5–2-GHz Band Using Multilayer Liquid Crystal Polymer Technology

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Heriot Watt Pure

Heriot Watt Pure

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