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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2012-12-06
High Performance Multi-Section Corrugated Slot-Coupled Directional Couplers
By
Alvaro Moscoso-Martir,

    Dr. Alvaro Moscoso-Martir

    Dept Ingn Comunicac

    Univ Malaga

    Spain

    Homepage

Inigo Molina-Fernandez,

    Dr. Inigo Molina-Fernandez

    Departmento de Ingenieria de Comunicaciones

    Malaga University

    Spain

    Homepage

Alejandro Ortega-Monux

    Dr. Alejandro Ortega-Monux

    Dept Ingn Comun

    Univ Malaga

    Spain

    Homepage

Progress In Electromagnetics Research, Vol. 134, 437-454, 2013
doi:10.2528/PIER12111504 | Google Scholar

Abstract
In this paper a robust technique for the design of high performance directional couplers is proposed. It combines the advantages of wiggly coupled lines and slot-coupled lines but overcomes their main limitations. The key to this novel technique is a new corrugated slot that allows perfect compensation of the even and odd mode phase velocities and can be easily designed using Bloch-Floquet theory, yielding outstanding performance. To demonstrate the validity of the proposed technique, the design of two different wideband directional couplers is presented. The first design consists of a 10 dB asymmetric directional coupler with a one decade bandwidth (1.2-12 GHz) that exhibits a coupling accuracy of 10±0.6 dB, a return loss better than 23 dB and an isolation better than 28 dB across the complete frequency band. The second design consists of a symmetric quadature hybrid that operates over the complete UWB band (3.1 to 10.6 GHz) showing an amplitude and phase imbalance between the output ports lower than ±0.5 dB and ±0.7°, respectively.
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Citation
Alvaro Moscoso-Martir, Inigo Molina-Fernandez, and Alejandro Ortega-Monux, "High Performance Multi-Section Corrugated Slot-Coupled Directional Couplers," PIER, Vol. 134, 437-454, 2013.
doi:10.2528/PIER12111504
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