A design of cascaded CPW low-pass filter with broad stopband

被引：7

作者：

No, Jin-Won ^{[1
]}

Hwang, Hee-Yong ^{[1
]}

机构：

[1] Kangwon Natl Univ, Dept Elect & Elect Engn, Chunchon 200701, South Korea

来源：

IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS | 2007年 / 17卷 / 06期

关键词：

coplanar waveguide (CPW); defected ground structure (DGS); harmonic passband; low-pass filter (LPF); size reduction;

D O I：

10.1109/LMWC.2007.897790

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：

A coplanar waveguide low-pass filter (LPF) using two different LPF unit cells (LUCs) and a small defected ground structure (DGS) unit cell (DUC) is presented. By cascading two LUCs, which are different in structure and harmonic passbands, and combining a dumbbell-like-shaped DUC to the cascaded LPF, we extended the stopband to seven times the cutoff frequency. The proposed LPF is superior to the conventionally cascaded LPF, in which the same LUCs are used, in reduction of the harmonic passbands and the size. The fabricated LPF shows a compact size of 18.2 mm x 11 mm, the cutoff frequency of 3 GHz, and the sharp skirt response like a fifth-order LPF with two notch frequencies. The measured frequency responses agree well with the simulated ones.

引用

页码：427 / 429

页数：3

共 12 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]

CHIOU YC, 2005, P AS PAC MICR C DEC, V3, P1442

[3]

Hwang H. -Y., 1997, IEEE MTT S INT MICR, V2, P805

[4]

Li JL, 2005, IEEE MTT S INT MICR, P1483

[5]

LI R, 2005, P AS PAC MICR C DEC, V3, P1450

[6] Wideband coplanar-waveguide bandpass filters with good stopband rejection [J].

Lin, YS ;

Ku, WC ;

Wang, CH ;

Chen, CH .

IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, 2004, 14 (09) :422-424

[7]

NO JW, 2005, P KOR EL ENG SOC KEE, V15, P63

[8]

NO JW, 2006, J KOREA ELECTROMAG E, V17, P117

[9] A compact semi-lumped low-pass filter for harmonics and spurious suppression [J].

Sheen, JY .

IEEE MICROWAVE AND GUIDED WAVE LETTERS, 2000, 10 (03) :92-93

[10] Miniature low-loss CPW periodic structures for filter applications [J].

Sor, J ;

Qian, YX ;

Itoh, T .

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 2001, 49 (12) :2336-2341

← 1 2 →