On-Chip Single-to-Balanced Multicoupled Line Bandpass Filters With Good Selectivity

NCUIR > College of Electrical Engineering & Computer Science > Department of Electrical Engineering > journal & Dissertation > Item 987654321/52088

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/52088

Title:	On-Chip Single-to-Balanced Multicoupled Line Bandpass Filters With Good Selectivity
Authors:	Lin,YS;You,CW;Tsai,CL
Contributors:	電機工程學系
Keywords:	DESIGN
Date:	2011
Issue Date:	2012-03-28 10:15:09 (UTC+8)
Publisher:	國立中央大學
Abstract:	In this work, on-chip single-to-balanced bandpass filters with good selectivity are proposed. The functions of bandpass filter and balun are integrated using a simple multicoupled line structure along with capacitive loadings. The use of inductor is avoided such that the proposed single-to-balanced bandpass filters can achieve very compact size when implemented on chip. They can be designed with the desired bandpass response and reference impedances through the proposed equivalent-circuit models and design equations. In addition, by introducing two cross-coupled capacitors, one tunable transmission zero can be achieved in either the lower or upper stopband to improve the selectivity. Specifically, two third-order single-to-balanced bandpass filter designs in commercial pHEMT process on 4-mil GaAs substrate with different transmission zero locations are presented. The circuit size is less than 1.02 mm x 0.86 mm for a center frequency of 5.5 GHz and a bandwidth of about 18.18%. The corresponding electrical size is only 0.054 lambda(g) x 0.045 lambda(g) at the center frequency. Good selectivity and balanced performance are demonstrated.
Relation:	IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
Appears in Collections:	[Department of Electrical Engineering] journal & Dissertation

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