DocumentCode :
1169247
Title :
A 3-dB Quadrature Coupler Suitable for PCB Circuit Design
Author :
Chiu, Jui-Chieh ; Lin, Chih-Ming ; Wang, Yeong-Her
Author_Institution :
Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan
Volume :
54
Issue :
9
fYear :
2006
Firstpage :
3521
Lastpage :
3525
Abstract :
A quadrature 3-dB coupler, which combines the advantages of a coplanar waveguide and microstrip line structure suitable for single-layer substrate printed circuit board (PCB) circuit design is proposed. As compared to the conventional Lange coupler, the proposed coupler with the advantages of increasing the coupled linewidths and coupling spacing without using extra bonding wires can solve the drawbacks of Lange coupler. In addition, the proposed structure can easily be realized in a single-layer substrate by PCB manufacturing processes to eliminate the effects and uncertain factors from a multilayer substrate. Good agreements between the simulation and measurement in the frequency range from 0.45 to 5 GHz can be seen. With the operation bandwidth ranging from 1.8 to 2.8 GHz, the measured results of the return loss are better than 18.2 dB and insertion losses of coupled and direct ports are approximately 3plusmn0.1 dB; the relative phase difference is approximately 89.8deg. The dimension of the circuit is 2.7 cm times1.6 cm times0.08 cm
Keywords :
UHF couplers; coplanar waveguides; microstrip couplers; printed circuit design; printed circuit manufacture; 0.08 cm; 0.45 to 0.5 GHz; 1.6 cm; 1.8 to 2.8 GHz; 2.7 cm; Lange coupler; bonding wires; coplanar waveguide; microstrip line; multilayer substrate; printed circuit board circuit design; printed circuit board manufacture; quadrature coupler; Bonding; Circuit synthesis; Coplanar waveguides; Coupling circuits; Frequency measurement; Manufacturing processes; Microstrip; Nonhomogeneous media; Printed circuits; Wires; 3-dB coupler; Coplanar waveguide (CPW); Lange coupler; microstrip line; quadrature;
fLanguage :
English
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9480
Type :
jour
DOI :
10.1109/TMTT.2006.879772
Filename :
1684147
Link To Document :
بازگشت