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Design and Analysis of Wideband Nonuniform Branch Line Coupler and Its Application in a Wideband Butler Matrix
Joint Authors
Rahardjo, E. T.
Asvial, M.
Ningsih, Yuli K.
Source
International Journal of Antennas and Propagation
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-7, 7 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-02-28
Country of Publication
Egypt
No. of Pages
7
Main Subjects
Abstract EN
This paper presents a novel wideband nonuniform branch line coupler.
An exponential impedance taper is inserted, at the series arms of the branch line coupler, to enhance the bandwidth.
The behavior of the nonuniform coupler was mathematically analyzed, and its design of scattering matrix was derived.
For a return loss better than 10 dB, it achieved 61.1% bandwidth centered at 9 GHz.
Measured coupling magnitudes and phase exhibit good dispersive characteristic.
For the 1 dB magnitude difference and phase error within 3∘, it achieved 22.2% bandwidth centered at 9 GHz.
Furthermore, the novel branch line coupler was implemented for a wideband crossover.
Crossover was constructed by cascading two wideband nonuniform branch line couplers.
These components were employed to design a wideband Butler Matrix working at 9.4 GHz.
The measurement results show that the reflection coefficient between the output ports is better than 18 dB across 8.0 GHz–9.6 GHz, and the overall phase error is less than 7∘.
American Psychological Association (APA)
Ningsih, Yuli K.& Asvial, M.& Rahardjo, E. T.. 2012. Design and Analysis of Wideband Nonuniform Branch Line Coupler and Its Application in a Wideband Butler Matrix. International Journal of Antennas and Propagation،Vol. 2012, no. 2012, pp.1-7.
https://search.emarefa.net/detail/BIM-503527
Modern Language Association (MLA)
Ningsih, Yuli K.…[et al.]. Design and Analysis of Wideband Nonuniform Branch Line Coupler and Its Application in a Wideband Butler Matrix. International Journal of Antennas and Propagation No. 2012 (2012), pp.1-7.
https://search.emarefa.net/detail/BIM-503527
American Medical Association (AMA)
Ningsih, Yuli K.& Asvial, M.& Rahardjo, E. T.. Design and Analysis of Wideband Nonuniform Branch Line Coupler and Its Application in a Wideband Butler Matrix. International Journal of Antennas and Propagation. 2012. Vol. 2012, no. 2012, pp.1-7.
https://search.emarefa.net/detail/BIM-503527
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-503527