A Compact Branch Line Coupler Using Defected Ground Structure

2008 ◽  
Vol 22 (2-3) ◽  
pp. 267-276 ◽  
Author(s):  
M. Ramesh ◽  
D. Packiaraj ◽  
A. T. Kalghatgi
Keyword(s):  
Defected Ground Structure ◽  
Ground Structure ◽  
Branch Line

Design of 10 dB 90° branch line coupler using microstrip line with defected ground structure

2000 ◽  
Vol 36 (21) ◽  
pp. 1784 ◽  
Author(s):  
Jong-Sik Lim ◽  
Chul-Soo Kim ◽  
Jun-Seok Park ◽  
Dal Ahn ◽  
Sangwook Nam
Keyword(s):  
Microstrip Line ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Branch Line

scholarly journals A Defected Ground Structure without Ground Contact Problem and Application to Branch Line Couplers

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Jongsik Lim ◽  
Dal Ahn ◽  
Sang-Min Han ◽  
Yongchae Jeong ◽  
Haiwen Liu
Keyword(s):  
Contact Problem ◽  
Microstrip Line ◽  
Ground Plane ◽  
Ground Contact ◽  
Defected Ground Structure ◽  
Critical Problem ◽  
Ground Structure ◽  
Branch Line ◽  
Layered Substrate ◽  
Hybrid Coupler

A new defected ground structure (DGS) microstrip line that is free from the ground contact problem is described together with its application example. The proposed DGS microstrip line adopts a double-layered substrate. The first layer contains the microstrip line and DGS patterns on the top and bottom planes as with the conventional DGS line. The second substrate, of which upper metal plane has already been removed, is attached to the bottom ground plane of the first layer. This structure prevents the ground plane of the first substrate with DGS patterns from making contact with the metal housing. The proposed DGS microstrip line has advantageous transmission and rejection characteristics, without the ground contact problem of DGS patterns, which has been a critical problem of previous DGS lines. A 10 dB branch line hybrid coupler is designed and measured, as an example of application of the proposed DGS microstrip line.

A 10dB Branch Line Coupler Using Defected Ground Structure

2000 ◽  
Author(s):  
Chul-Soo Kim ◽  
Jong-Sik Lim ◽  
Jun-Seok Park ◽  
Dal Ahn ◽  
Sangwook Nam
Keyword(s):  
Defected Ground Structure ◽  
Ground Structure ◽  
Branch Line

Design of a Branch Line Coupler Using Stripline and Common Defected Ground Structure

2018 ◽  
Vol 16 (4) ◽  
pp. 87-93 ◽  
Author(s):  
Jongsik Lim ◽  
Won-Sang Yoon ◽  
Heeyoun Choi ◽  
Sang-Min Han ◽  
Dal Ahn
Keyword(s):  
Defected Ground Structure ◽  
Ground Structure ◽  
Branch Line
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