Stopband-enhanced and size-miniaturized low-pass filters using high-impedance property of offset finite-ground microstrip line

被引：32

作者：

Sun, S ^{[1
]}

Zhu, L ^{[1
]}

机构：

[1] Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore 639798, Singapore

来源：

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES | 2005年 / 53卷 / 09期

关键词：

enhanced stopband; finite-ground microstrip line (FGML); high characteristic impedance; low-pass filter (LPF); method of moments (MoM); short-open calibration (SOC);

D O I：

10.1109/TMTT.2005.854173

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The uniform finite-ground microstrip line (FGMSL) and its constituted circuit elements are thoroughly characterized via self-calibrated method of moments for innovative design of a stopband-enhanced and size-miniaturized low-pass filter (LPF). Firstly, an offset FGMSL is modeled and extracted to quantitatively exhibit its capacity in achieving higher characteristic impedance compared to the infinite-ground microstrip line (MSL) counterpart. Secondly, the finite-extended FGMSL section with equally widened strip/ground or offset narrow strip/ground conductors is studied in terms of an equivalent T- or pi-network, thereby constructing the modified MSL shunt capacitive or series inductive element. By making effective use of enlarged series inductance of an offset FGMSL with shorter electrical length, two novel LPF blocks are designed on a basis of cascaded circuit networks. Predicted S-parameters show widened and deepened stopband beyond the low passband. Furthermore, it is confirmed by measurement.

引用

页码：2844 / 2850

页数：7

共 14 条

[1] A design of the low-pass filter using the novel microstrip defected ground structure [J].

Ahn, D ;

Park, JS ;

Kim, CS ;

Kim, J ;

Qian, YX ;

Itoh, T .

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 2001, 49 (01) :86-93

[2]

HONG JSG, 2001, WILEY MICRO, P1

[3] Compact elliptic-function low-pass filters using microstrip stepped-impedance hairpin resonators [J].

Hsieh, LH ;

Chang, K .

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 2003, 51 (01) :193-199

[4] Compact microstrip lowpass filter using shunt open stubs and coupled slots on ground plane [J].

Kim, K ;

Kim, S ;

Han, H ;

Park, I ;

Lim, H .

ELECTRONICS LETTERS, 2004, 40 (05) :313-314

[5] Ultrawide-band transitions and new microwave components using double-sided parallel-strip lines [J].

Kim, SG ;

Chang, K .

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 2004, 52 (09) :2148-2152

[6]

Matthaei G. L., 1980, Microwave Filters, Impedance-Matching Networks, and Coupling Structures

[7]

Ponchak GE, 2002, IEEE MTT S INT MICR, P2221, DOI 10.1109/MWSYM.2002.1012314

[8] Low loss, finite width ground plane, thin film microstrip lines on Si wafers [J].

Ponchak, GE ;

Margomenos, A ;

Katehi, LPB .

2000 TOPICAL MEETING ON SILICON MONOLITHIC INTEGRATED CIRCUITS IN RF SYSTEMS, DIGEST OF PAPERS, 2000, :43-47

[9] MICROSTRIP TRANSMISSION-LINE WITH FINITE-WIDTH DIELECTRIC AND GROUND PLANE [J].

SMITH, CE ;

CHANG, RS .

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 1985, 33 (09) :835-839

[10] SAGE is far more sensitive than EST for detecting low-abundance transcripts [J].

Sun, M ;

Zhou, GL ;

Lee, S ;

Chen, JJ ;

Shi, RZ ;

Wang, SM .

BMC GENOMICS, 2004, 5 (1)

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