Directional coupler for gigahertz frequencies, based on the coupling properties of two planar comb transmission lines

1975 ◽  
Vol 11 (17) ◽  
pp. 406 ◽  
Author(s):  
D.J. Gunton ◽  
E.G.S. Paige
Keyword(s):  
Transmission Lines ◽  
Directional Coupler

Ka-band surface-mount directional coupler fabricated using micro-rectangular coaxial transmission lines

2008 ◽  
Author(s):  
Kenneth Vanhille ◽  
Jean-Marc Rollin ◽  
Sebastien Rondineau ◽  
John O'Brien ◽  
Joseph Wood ◽  
...  
Keyword(s):  
Transmission Lines ◽  
Directional Coupler ◽  
Ka Band ◽  
Surface Mount

scholarly journals Highly Unequal Three-Port Power Divider: Theory and Implementation

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Duolong Wu ◽  
Adriana Serban ◽  
Magnus Karlsson ◽  
Shaofang Gong
Keyword(s):  
Transmission Lines ◽  
Directional Coupler ◽  
Feedback Mechanism ◽  
Power Divider ◽  
Electromagnetic Simulation ◽  
Planar Form ◽  
Measurement Results ◽  
Minimum Number ◽  
Wilkinson Power Divider ◽  
Good Agreement

A three-port power divider consisting of a directional coupler, a Wilkinson power divider, and two transmission lines connected to them is proposed. Theoretical analysis reveals that highly unequal power division can be achieved by a feedback mechanism of two transmission lines along with the coupling coefficient of the directional coupler and the power division ratio of the Wilkinson power divider. The three-port power divider inherits the performance characteristics of high isolation, low reflection coefficients at all ports, and the minimum number of components. The proposed power divider is designed at 5.8 GHz and fabricated and evaluated through measurements. It demonstrates that electromagnetic simulation results are in good agreement with theoretical prediction and measurement results. The three-port power divider is compact in the planar form, so it can be easily integrated into radio frequency front ends.

Compact capacitive compensated directional coupler using planar artificial transmission lines

2011 ◽  
Vol 47 (24) ◽  
pp. 1321 ◽  
Author(s):  
C. Liu ◽  
T. Yang ◽  
K. Huang ◽  
W. Menzel
Keyword(s):  
Transmission Lines ◽  
Directional Coupler

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.

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