Flexible Phase Difference of 4 × 4 Butler Matrix without Phase-Shifters and Crossovers
Joint Authors
Source
International Journal of Antennas and Propagation
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-7, 7 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-12-04
Country of Publication
Egypt
No. of Pages
7
Main Subjects
Abstract EN
This paper proposes a new Butler matrix topology.
The proposed Butler matrix consists of only four couplers without phase shifters and crossovers.
The output phase difference is relatively flexible.
Compared with the phase differences (±45° and ±135°) generated by the conventional Butler matrix, the proposed design can generate different sets of phase differences, which can be realized from −180° to 180°.
The proposed new Butler matrix replaces the traditional 90° coupler with arbitrary phase-difference couplers.
In this paper, closed-form design equations are derived and presented.
A 4 × 4 Butler matrix with output phase differences of −30°, +150°, −120°, and +60° is designed according to equations.
The 4 × 4 Butler is meant to operate at 2 GHz.
The simulation results show that the amplitude unbalance is less than 0.1 dB, the phase mismatch is within 1°, the return loss is higher than 29 dB, and the isolation is higher than 32 dB.
American Psychological Association (APA)
Han, Ke& Li, Wuyu& Liu, Yibin. 2019. Flexible Phase Difference of 4 × 4 Butler Matrix without Phase-Shifters and Crossovers. International Journal of Antennas and Propagation،Vol. 2019, no. 2019, pp.1-7.
https://search.emarefa.net/detail/BIM-1157484
Modern Language Association (MLA)
Han, Ke…[et al.]. Flexible Phase Difference of 4 × 4 Butler Matrix without Phase-Shifters and Crossovers. International Journal of Antennas and Propagation No. 2019 (2019), pp.1-7.
https://search.emarefa.net/detail/BIM-1157484
American Medical Association (AMA)
Han, Ke& Li, Wuyu& Liu, Yibin. Flexible Phase Difference of 4 × 4 Butler Matrix without Phase-Shifters and Crossovers. International Journal of Antennas and Propagation. 2019. Vol. 2019, no. 2019, pp.1-7.
https://search.emarefa.net/detail/BIM-1157484
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1157484