標題: Realization of transmission zeros in combline filters using an auxiliary inductively coupled ground plane
作者: Tang, CW
Lin, YC
Chang, CY
電信工程研究所
Institute of Communications Engineering
關鍵字: chip-type component;filter;low-temperature co-fired ceramic (LTCC);multilayer ceramic (MLC)
公開日期: 1-Oct-2003
摘要: The out-band transmission zeros of the multilayer low-temperature co-fired ceramic bandpass filter are studied in this paper. The design target of this filter, with the passband between 2.3-2.65 GHz (the true application is 2.4-2.483 GHz), is to reject the local oscillator and image signals and, in the mean time, to suppress the harmonic frequency. This filter is a modified three-pole combline filter, which can easily achieve a high rejection rate and low insertion loss. The source-load coupling capacitor incorporation with cross-coupling grounding inductors can generate three transmission zeros. By properly adjusting the inductance values of the inductors between three resonators and ground can easily manipulate the transmission zero at a high-side skirt to suppress the harmonic frequency. The measured results match well with the electromagnetic simulation that evidences the feasibility of the proposed design.
URI: http://dx.doi.org/10.1109/TMTT.2003.817447
http://hdl.handle.net/11536/27475
ISSN: 0018-9480
DOI: 10.1109/TMTT.2003.817447
期刊: IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
Volume: 51
Issue: 10
起始頁: 2112
結束頁: 2118
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