Results 201 to 210 of about 16,092 (254)

Asymmetrical $4\times4$ Butler Matrix and its Application for Single Layer $8\times8$ Butler Matrix

IEEE Transactions on Antennas and Propagation, 2019
The design procedure and measured results of a novel $4\times 4$ Butler matrix are presented in this paper. This asymmetrical structure provides fairly flexible phase outputs; therefore, the array radiation pattern can be rotated around the array normal axis.
Mohammad Fakharzadeh, Ali Tajik
exaly   +2 more sources

The systematic design of the Butler matrix

IEEE Transactions on Antennas and Propagation, 1964
exaly   +2 more sources

Wideband Slot-Coupled Butler Matrix

IEEE Microwave and Wireless Components Letters, 2014
We 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, I. Molina-Fernandez, A. Ortega-Monux   +2 more
openaire   +1 more source

Design of the Compact Planar Butler Matrix

2018 Asia-Pacific Microwave Conference (APMC), 2018
A planar $4\times 4$ Butler matrix with a compact size is proposed. With the dual transmission lines, the proposed Butler matrix has arbitrary phase difference and phase delay for the used couplers and crossovers, respectively. In terms of experimental verification, the circuit size of the fabricated Butler matrix is $0.86\lambda_{g}\times 0.66\lambda_{
Chen-Chan Tang, Chun-Yuan Huang, Ching-Wen Tang   +2 more
openaire   +1 more source

A butler matrix design for directional antenna

2017 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium), 2017
This paper demonstrates an 8 × 8 Butler Matrix design that does not employ cross-overs. The Butler Matrix was manufactured on a single side of Printed Circuit Board (PCB) and is intended for use with a low-profile C-band directional antenna array. This solution provides an effective methodology for electronically switching beam states of a planner ...
Shuguang Chen, Mahmoud Khalil, Steven Goodall   +2 more
openaire   +1 more source

A high-temperature superconducting butler matrix

IEEE Transactions on Appiled Superconductivity, 2003
This 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
openaire   +1 more source

Planar Butler Matrix Based on Compact Taps

2019 IEEE East-West Design & Test Symposium (EWDTS), 2019
The 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.
openaire   +1 more source

A compact butler matrix for WLAN application

Microwave and Optical Technology Letters, 2010
AbstractIn 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
openaire   +1 more source

Butler matrix for harmonic radar application

2016 International Symposium on Fundamentals of Electrical Engineering (ISFEE), 2016
This 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
openaire   +1 more source

Butler Matrix 4x4 Ultra High Frequency

2020 Systems of Signal Synchronization, Generating and Processing in Telecommunications (SYNCHROINFO), 2020
A 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, D. A. Letavin, I. A. Terebov   +2 more
openaire   +1 more source