紧凑型高共模抑制微带平衡滤波器

doi:10.3969/j.issn.1001-2400.2012.04.002

J4 ›› 2012, Vol. 39 ›› Issue (4): 7-10+16.doi: 10.3969/j.issn.1001-2400.2012.04.002

• Original Articles • Previous Articles Next Articles

Design of compact microstrip balanced filter with high common-mode suppression

CHEN Jianzhong;LIANG Changhong;WU Bian;WANG Yi

(Science and Technology on Antenna and Microwave Lab., Xidian Univ., Xi'an 710071， China)

Received:2011-04-11 Online:2012-08-20 Published:2012-10-08
Contact: CHEN Jianzhong E-mail:xjtucjz@gmail.com

Abstract

Abstract:

The traditional microstrip balanced bandpass filter (BPF) usually has disadvanteges of large size and low common-mode suppression. This paper presents a novel compact microstrip balanced BPF with improved performance of common-mode suppression. Firstly, it proposes the differential and common-mode equivalent circuits of the balanced BPF. Secondly, a very compact interdigital coupled resonator is analyzed, which has the characteristic of strong mismatch with common-mode signals. By using this novel resonator, a balanced BPF with good performance and miniaturization can be achieved. Finally, a balanced BPF centering at 2.45GHz is designed and fabricated. Measured results and simulated results are in good agreement.

Key words: compact, common-mode, differential-mode, balanced bandpass filter

CHEN Jianzhong;LIANG Changhong;WU Bian;WANG Yi. Design of compact microstrip balanced filter with high common-mode suppression[J].J4, 2012, 39(4): 7-10+16.

References

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Design of compact microstrip balanced filter with high common-mode suppression

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