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Design and Experimental Validation of 2.4Ghz Crossover-Free 8 × 8 Butler Matrix
2025 Photonics & Electromagnetics Research Symposium - Spring (PIERS-Spring)A typical Butler Matrix (BM) commonly comprises couplers, crossovers, and phase shifters, which work together to control the phase and amplitude of antenna elements for multibeam configuration. However, as wireless systems continue to evolve, there is an
Muhammad Manzil Karama +2 more
semanticscholar +1 more source
A 7 × 8 Butler Matrix-Fed Multibeam Antenna Based on Substrate Integrated Waveguide Technology
IEEE Antennas and Wireless Propagation Letters, 2023In this letter, a novel 7 × 8 Butler matrix (BM) operating in the millimeter-wave band is presented. It is composed of a 3 × 4 BM, two 3 × 4-like BM, two phase shifters and two couplers, achieving equal amplitude output distribution and seven output ...
Zhi-Peng Liu, Fulong Chen, Chong Qin
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2017 Conference on Microwave Techniques (COMITE), 2017
In this paper, a novel design of a broadband 3 x 3 Butler matrix is proposed. It is composed of three single-section coupled-line directional couplers and two Schiffman phase shifters and operates in the frequency range 2.5 GHz – 3.5 GHz. The fabricated 3 x 3 Butler matrix features very good frequency response in terms of transmission imbalance ...
Szczepan Odrobina +3 more
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In this paper, a novel design of a broadband 3 x 3 Butler matrix is proposed. It is composed of three single-section coupled-line directional couplers and two Schiffman phase shifters and operates in the frequency range 2.5 GHz – 3.5 GHz. The fabricated 3 x 3 Butler matrix features very good frequency response in terms of transmission imbalance ...
Szczepan Odrobina +3 more
openaire +1 more source
IEEE transactions on microwave theory and techniques
This article presents a design method for a continuously tunable phase shifter (PS) based on a varactor-loaded slot line structure. The equivalent capacitance of the varactor is varied to achieve phase changes, and quarter-wavelength open-circuit ...
Fang Liu +5 more
semanticscholar +1 more source
This article presents a design method for a continuously tunable phase shifter (PS) based on a varactor-loaded slot line structure. The equivalent capacitance of the varactor is varied to achieve phase changes, and quarter-wavelength open-circuit ...
Fang Liu +5 more
semanticscholar +1 more source
A Dual-Band Filtering 4 × 4 Butler Matrix Based on SLR
IEEE Antennas and Wireless Propagation Letters, 2023In this letter, a dual-band filtering 4×4 Butler matrix (DB-F-BM) based on a stub-loaded resonator (SLR) is proposed, operating at 12 and 17 GHz. The dual-band filtering (DB-F) 180° hybrid coupler can provide power allocation, phase shifting, and ...
Shishan Qi +4 more
semanticscholar +1 more source
On the Design of Linear Array with Steerable Beam Fed by Crossover-Free Butler Matrix
2025 International Technical Conference on Circuits/Systems, Computers, and Communications (ITC-CSCC)There are various methods to produce steerable beam in array antenna, one of them is using a beamforming network. This paper focuses on the design of a linear array antenna with steerable beam which is fed by a crossover-free 8×8 Butler matrix.
Achmad Munir +5 more
semanticscholar +1 more source
General Optimized Design of the E-Plane Waveguide Butler Matrix With Non-2n Beams Based on the FFT
IEEE Transactions on Antennas and PropagationThe Butler matrix is a well-known beamforming network (BFN) for antenna arrays that can achieve multiorthogonal beams with the number of ports typically limited to $2^{n}$ .
Bin-Yu Han +5 more
semanticscholar +1 more source
Intelligent Memory Systems, 2023
This paper presents a wirelessly-powered relay transceiver for expanding millimeter-wave 5G coverage. By incorporating an on-chip butler matrix, the beam control free 5G relay transceiver is realized.
Keito Yuasa +4 more
semanticscholar +1 more source
This paper presents a wirelessly-powered relay transceiver for expanding millimeter-wave 5G coverage. By incorporating an on-chip butler matrix, the beam control free 5G relay transceiver is realized.
Keito Yuasa +4 more
semanticscholar +1 more source
Multilayered substrate integrated waveguide 4 × 4 butler matrix
International Journal of RF and Microwave Computer-Aided Engineering, 2012In this article, a multilayered substrate integrated waveguide (SIW) Butler matrix beam-forming network is proposed, designed, and demonstrated at 24 GHz for automotive radar system applications. The proposed low-cost SIW structure can be used to develop a highly integrated multibeam antenna platform in automotive radar systems and other applications ...
Tarek Djerafi, Ke Wu
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Design of Broadband 9×9 Butler Matrix and its Extension for Multibeam Application
IEEE Transactions on Circuits and Systems - II - Express Briefs, 2023In this brief, a broadband $9\times9$ Butler Matrix (BM) and its extension for multibeam antenna array (MAA) application are presented. Based on the configuration of $3\times3$ beamforming network (BFN) comprised of three couplers and two 90° phase ...
Kangkang Han +4 more
semanticscholar +1 more source