Results 231 to 240 of about 1,869,876 (283)
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Wideband Slot-Coupled Butler Matrix
IEEE Microwave and Wireless Components Letters, 2014We present a multilayer 4 × 4 Butler matrix based on corrugated slot-coupled structures, which operates over the complete UWB band (3.1 to 10.6 GHz) with excellent phase and amplitude performance. A prototype has been fabricated which covers the UWB band with a measured return loss better than 21 dB, an isolation better than 24 dB, an amplitude ...
A. Moscoso-Martir +2 more
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Butler matrix for harmonic radar application
2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE), 2016This paper presents a Butler matrix for harmonic radar application. The proposed Butler matrix has the same beam directions in the two different frequencies and the higher frequency can be the double of the lower frequency. Therefore, it can be implemented on the harmonic radar for beam steering function.
Zuo-Min Tsai, Po-Shien Li
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Planar Butler Matrix Based on Compact Taps
2019 IEEE East-West Design & Test Symposium (EWDTS), 2019The paper presents a planar Butler matrix operating in the range of 0.9-1.05 GHz, implemented on compact directional couplers. The intersecting lines in the matrix are implemented based on the crossover. Modeling and electrodynamic analysis of the circuits was performed in the NI-AWR Design Environment program.
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A high-temperature superconducting butler matrix
IEEE Transactions on Appiled Superconductivity, 2003This paper presents a novel configuration of a beamforming 16-port Butler matrix centered on a frequency of 2 GHz. The structure is implemented using high-temperature superconductors (HTS). In communication and remote sensing systems, multibeam antenna systems are gradually replacing single-beam systems.
A. Corona, M.J. Lancaster
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A compact butler matrix for WLAN application
Microwave and Optical Technology Letters, 2010AbstractIn this article, a compact butler matrix for wireless communications is designed and implemented at 2.4 GHz using defected ground structures (DGS).The butler matrix consists of a 3‐dB coupler, crossover (0‐dB coupler), and phase shifter. The 3‐dB coupler and crossover are compacted using T‐model of transmission line and DGS.
Mohsen Maddah‐Ali, Keyvan Forooraghi
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Novel UWB multilayer Butler matrix
2010 IEEE Antennas and Propagation Society International Symposium, 2010Smart antennas are introduced to improve the performance of wireless systems and increase their capacity by spatial filtering, which can separate spectrally and temporally overlapping signals from multiple users. Switched beams systems are referred as smart antenna system that forms multiple fixed beams with enhanced sensitivity in a specific area ...
M traii +3 more
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Butler Matrix 4x4 Ultra High Frequency
2020 Systems of Signal Synchronization, Generating and Processing in Telecommunications (SYNCHROINFO), 2020A Butler matrix scheme with the possibility of forming four independent radiation patterns is proposed. The dimensions of the circuit under consideration were reduced due to the miniaturization of all directional couplers included in the matrix. The dimensions of the couplers were reduced using artificial transmission lines - this allowed to reduce the
Dilshod C. Ravshanov +2 more
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A Novel Design of Miniaturized Butler Matrix
2018 IEEE 18th International Conference on Communication Technology (ICCT), 2018In this paper, we design a stepped miniaturized 4 × 4 Butler matrix using the principle of impedance transformation. Compared with the traditional Butler matrix, the miniaturized Butler matrix has a reduced area of 78.6%, and the output amplitude is stable, the output phase gradient meets the design requirements.
Ruobing Liang +6 more
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Ultra wideband coupler design for Butler Matrix application
The 17th Asia Pacific Conference on Communications, 2011This paper presents a design of a 3-dB compact ultra wideband (UWB) coupler for a 4×4 Butler Matrix which is operating between 3 and 11 GHz frequency range. The design is using microstrip-slot multilayer technology that allows having a compact and very broad bandwidth coupler.
Nor Salehah Binti Muklas +2 more
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A Design of Compact Ultra Wideband Coupler for Butler Matrix
Wireless Personal Communications, 2012A design of 3 dB compact ultra wideband (UWB) coupler for a 4 A— 4 Butler Matrix, which is operating between 3 and 11 GHz frequency range, is presented in this paper. The proposed design uses multilayer technology that allows having a compact and broad bandwidth coupler. The design uses elliptically shaped broadside coupled strips and a slot created in
Nor Salehah Binti Muklas +5 more
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