DocumentCode :
1084402
Title :
A 3-dB Quadrature Coupler Using Broadside-Coupled Coplanar Waveguides
Author :
Chang, Chieh-Pin ; Chiu, Jui-Chieh ; Chiu, Hua-Yueh ; Wang, Yeong-Her
Author_Institution :
Nat. Cheng-Kung Univ., Tainan
Volume :
18
Issue :
3
fYear :
2008
fDate :
3/1/2008 12:00:00 AM
Firstpage :
191
Lastpage :
193
Abstract :
A 3-dB quadrature coupler which combines the advantages of broadside-coupling and coplanar waveguide structure suitable for a single-layer printed circuit board (PCB) circuit design is proposed. Compared to the recently published broadside-coupled structures, the proposed coupler can easily be realized in a single-layer substrate by using PCB manufacturing processes to eliminate the effects of uncertain factors from a multi-layer substrate. With the operation bandwidth ranging from 2.1 to 2.7 GHz, the measured return loss and isolation are all better than 19dB, and the insertion losses and relative phase difference between the direct and coupled ports are at 3.2 plusmn 0.1 dB and 90 plusmn 0.6deg, respectively. The dimension of the coupler is 2.1 cm times 1.9 cm.
Keywords :
UHF couplers; coplanar waveguides; printed circuits; waveguide couplers; PCB manufacturing processes; broadside-coupled coplanar waveguides; frequency 2.1 GHz to 2.7 GHz; loss 3 dB; quadrature coupler; single-layer printed circuit board; single-layer substrate; Broadside-coupled; coplanar waveguide (CPW); coupler; printed circuit board (PCB);
fLanguage :
English
Journal_Title :
Microwave and Wireless Components Letters, IEEE
Publisher :
ieee
ISSN :
1531-1309
Type :
jour
DOI :
10.1109/LMWC.2008.916805
Filename :
4459073
Link To Document :
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