volume | PIER Journals

2010-05-14

High Performance 1.8-18ghz 10-dB Low Temperature Co-Fired Ceramic Directional Coupler

Benito Lopez-Berrocal,

Dr. Benito Lopez-Berrocal

Departmento de Ingenieria de Comunicaciones

Malaga University

Spain

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Jose de-Oliva-Rubio,

Dr. Jose de-Oliva-Rubio

Univ Malaga

Spain

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Enrique Marquez-Segura,

Dr. Enrique Marquez-Segura

Ingeniería de Comunicaciones

Universidad de Malaga

Spain

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Alvaro Moscoso-Martir,

Dr. Alvaro Moscoso-Martir

Dept Ingn Comunicac

Univ Malaga

Spain

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Inigo Molina-Fernandez,

Dr. Inigo Molina-Fernandez

Departmento de Ingenieria de Comunicaciones

Malaga University

Spain

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Peter Uhlig

Mr. Peter Uhlig

IMST GMbH

Germany

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Progress In Electromagnetics Research, Vol. 104, 99-112, 2010

doi:10.2528/PIER10040704

Abstract

This paper presents a six-section multi-layer asymmetric 10 dB directional coupler based on offset broadside coupled striplines, using Low Temperature Co-fired Ceramic (LTCC) technology, which operates over a decade bandwidth from 1.8 to 18 GHz. It features high performance transitions between the external signal layer and the buried signal layers, as well as a novel mixed first section to solve the limitations of the coupler access bends. A prototype was manufactured that exhibits a return loss of better than 15 dB, isolation of better than 23 dB and a high coupling accuracy of 10.3±0.6 dB over the 1.8-18 GHz band. This design outperforms previously reported results in terms of bandwidth and shows excellent potential for microwave measurement applications.

Citation

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Benito Lopez-Berrocal, Jose de-Oliva-Rubio, Enrique Marquez-Segura, Alvaro Moscoso-Martir, Inigo Molina-Fernandez, and Peter Uhlig, "High Performance 1.8-18ghz 10-dB Low Temperature Co-Fired Ceramic Directional Coupler," Progress In Electromagnetics Research, Vol. 104, 99-112, 2010.
doi:10.2528/PIER10040704

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