Design of New Quad-Channel Diplexer With Compact Circuit Size

Author

Hung-Wei Wu ; Shih-Hua Huang ; Yu-Fu Chen

Author_Institution

Dept. of Comput. & Commun., Kun Shan Univ., Tainan, Taiwan

Volume

23

Issue

5

fYear

2013

fDate

May-13

Firstpage

240

Lastpage

242

Abstract

New compact quad-channel diplexer (1.5/2 GHz and 2.4/3.5 GHz) using the coupled stepped impedance resonators (SIRs) is proposed. The quad-channel diplexer is composed of two pairs of coupled SIRs with impedance ratio (K > 1) and the source-load coupling lines. By tuning the impedance ratio and length ratio (α) of SIRs, the resonant modes can be easily determined so as to implement a two-order bandpass filter with very close dual-passbands. The source-load coupling lines are designed to correspond to the quarter-wavelength at the center frequency of first passband for each output port. The proposed quad-channel diplexer is showing a simple configuration, an effective design method and a small circuit size.

Keywords

band-pass filters; coupled circuits; resonator filters; SIR; compact circuit size; compact quad-channel diplexer; coupled stepped impedance resonator; dual-passband; frequency 1.5 GHz; frequency 2 GHz; frequency 2.4 GHz; frequency 3.5 GHz; impedance ratio; length ratio; resonant mode; source-load coupling lines; two-order bandpass filter; Bandpass filter (BPF); diplexer; quad-channel; source-load coupling; stepped impedance resonator (SIR);

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2013.2253314

Filename

6497077