scholarly journals NOVEL SYMMETRICAL COUPLED-LINE DIRECTIONAL COUPLER BASED ON RESONANT-TYPE COMPOSITE RIGHT-/LEFT-HANDED TRANSMISSION LINES

2013 ◽  
Vol 140 ◽  
pp. 213-226 ◽  
Author(s):  
Yanbing Ma ◽  
Huai-Wu Zhang ◽  
Yuanxun Li
Keyword(s):  
Transmission Lines ◽  
Directional Coupler ◽  
Coupled Line ◽  
Left Handed ◽  
Type Composite

Application of RH and LH sections for reduction of coupling coefficients in two-section asymmetric directional couplers

2015 ◽  
Vol 8 (3) ◽  
pp. 559-565 ◽  
Author(s):  
Jakub Sorocki ◽  
Kamil Staszek ◽  
Ilona Piekarz ◽  
Krzysztof Wincza ◽  
Slawomir Gruszczynski
Keyword(s):  
Theoretical Analysis ◽  
Transmission Lines ◽  
Directional Coupler ◽  
Center Frequency ◽  
Coupling Coefficients ◽  
Directional Couplers ◽  
Coupled Line ◽  
Left Handed ◽  
Design Flexibility

A method allowing for reduction of coupling coefficients required for realization of two-section asymmetrical coupled-line directional couplers has been proposed. It has been shown that by connecting uncoupled left-handed and right-handed transmission lines between two coupled-line sections one can obtain greater design flexibility of the resulting circuit, simultaneously with the coupling reduction in coupled-line sections. Moreover, the proposed circuit features the properties of two-section asymmetric directional couplers offering wide operational bandwidth. The theoretical analysis has been verified by measurements of a 3 dB directional coupler operating at the center frequency f0 = 1.5 GHz having coupling imbalance δC = ±0.4 dB and bandwidth 0.75–2.3 GHz.

Analysis and Design of Two-Dimensional Resonant-Type Composite Right/Left-Handed Transmission Lines With Compact Gain-Enhanced Resonant Antennas

2013 ◽  
Vol 61 (2) ◽  
pp. 735-747 ◽  
Author(s):  
He-Xiu Xu ◽  
Guang-Ming Wang ◽  
Mei-Qing Qi ◽  
Chen-Xin Zhang ◽  
Jian-Gang Liang ◽  
...  
Keyword(s):  
Transmission Lines ◽  
Two Dimensional ◽  
Analysis And Design ◽  
Left Handed ◽  
Type Composite

Directional couplers with reduced coupling requirements as connection of coupled‐line sections and left‐handed transmission lines

2014 ◽  
Vol 8 (8) ◽  
pp. 580-588 ◽  
Author(s):  
Jakub Sorocki ◽  
Kamil Staszek ◽  
Ilona Piekarz ◽  
Krzysztof Wincza ◽  
Slawomir Gruszczynski
Keyword(s):  
Transmission Lines ◽  
Directional Couplers ◽  
Coupled Line ◽  
Left Handed
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