Novel butler matrix using CPW multilayer technology

Nedil, Mourad; Denidni, Tayeb A.; Talbi, Larbi

doi:10.1109/tmtt.2005.860490

Cited by 132 publications

(68 citation statements)

References 19 publications

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“…As reported in [11], the bandwidth of the element antenna is about 8% and the mutual coupling is better than −20 dB. The Figure 15.…”

Section: × 4 Butler Matrixmentioning

confidence: 59%

“…7. From these results, it can be noted that a bandwidth of 3 GHz (∼ 50%) is achieved which is clearly wider than the bandwidth of conventional CPW branch-line couplers (25%) [11].…”

Section: Cb-cpw Elliptic Directional Couplermentioning

confidence: 81%

“…Some other configurations have been investigated allowing to reduce dimensions without offering very wide bandwidth [9,10]. Few authors have suggested different matrix configurations that does not require crossing lines [11][12][13][14]. In [11], a 4 × 4 CPW Multilayer Butler matrix based on slot-coupled directional couplers is reported.…”

mentioning

confidence: 99%

“…Few authors have suggested different matrix configurations that does not require crossing lines [11][12][13][14]. In [11], a 4 × 4 CPW Multilayer Butler matrix based on slot-coupled directional couplers is reported. This matrix offers a bandwidth of only 1.5 GHz due to the use of conventional hybrid couplers.…”

mentioning

confidence: 99%

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Novel Wideband Multilayer Butler Matrix Using Cb-CPW Technology

Kilani¹,

Nedil²,

Kandil³

et al. 2012

PIER C

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Abstract-This paper presents a novel design of a 4 × 4 twolayer wideband Butler matrix using a CB-CPW wideband multilayer directional coupler as well as a novel CB-CPW wideband elliptic directional coupler. With this configuration, the proposed matrix was designed to avoid crossovers as in conventional Butler matrices, thus reducing its size, losses and the design complexity while leading to a broad bandwidth of 3 GHz. To evaluate the performance of the proposed matrix, experimental prototypes of the directional elliptic coupler, the CB-CPW multilayer directional coupler and Butler matrix were fabricated and measured. Furthermore, a 4-element antenna array was connected to the matrix to form a beamforming antenna system at 5.8 GHz. As a result, four orthogonal beams were realized in the band 4.5-7.5 GHz.

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“…As reported in [11], the bandwidth of the element antenna is about 8% and the mutual coupling is better than −20 dB. The Figure 15.…”

Section: × 4 Butler Matrixmentioning

confidence: 59%

“…7. From these results, it can be noted that a bandwidth of 3 GHz (∼ 50%) is achieved which is clearly wider than the bandwidth of conventional CPW branch-line couplers (25%) [11].…”

Section: Cb-cpw Elliptic Directional Couplermentioning

confidence: 81%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Novel Wideband Multilayer Butler Matrix Using Cb-CPW Technology

Kilani¹,

Nedil²,

Kandil³

et al. 2012

PIER C

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“…These days, there are two methods to obtain a wideband Butler matrix in general. One method is using multilayer technology, such as two-layer substrate integrated waveguide (SIW) [1], multilayer coplanar waveguide (CPW) [2] and stripline coupled line [3]. The other method is based on planar printed circuit technology such as SIW [4] and microstrip lines [5,6].…”

Section: Introductionmentioning

confidence: 99%

DESIGN AND IMPLEMENTATION OF A COMPACT PLANAR 4 x 4 MICROSTRIP BUTLER MATRIX FOR WIDEBAND APPLICATION

Chen¹,

Wu²,

Wu³

2011

PIER C

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Abstract-A compact planar 4 × 4 microstrip Butler matrix is proposed in this paper. It is a wideband beam-forming network with the advantages of compact size, low cost and ease of fabrication. Threebranch line couplers with lumped-distributed elements are adopted to reduce the size, and multi-U-shaped coupled-line Schiffman phase shifters are designed to get good transmission and phase performances. The Butler matrix is fabricated and measured, and a good agreement is found between the simulated and measured results, which makes it very attractive for wideband multi-beam antenna applications.

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Substrate Integrated Multibeam Antennas

Cheng

2016

Wiley Encyclopedia of Electrical and Electronics Engineering

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There is an increasing need for antennas with multiple beam capability to satisfy the growing demand for communication systems and multiple target radars. In the millimeter‐wave frequency band, the power budget is usually costly and difficult to satisfy the requirement for long‐distance and wide‐coverage applications. Therefore, high‐gain, high‐efficient multibeam antennas are necessary for millimeter‐wave systems to improve their performances. An antenna array scheme based on the passive beamforming network (BFN) is an efficient way to form multiple beams in different directions from the same aperture. Depending on simple circuitry and cheap cost, this type of multibeam antenna can be a substitution of passive, active, and digital phased arrays. The currently popular substrate integrated waveguide (SIW) techniques, also called as postwall waveguide or laminated waveguide, combine the best and complementary features of both planar transmission lines and nonplanar waveguides. Thus, it is found very appropriate to construct different high‐frequency circuits and antennas that have been validated by several successful examples. This article presents recent achievements in the development of microwave and millimeter‐wave substrate integrated beamforming networks (BFNs) incorporating both lens‐ and circuit‐based types. They include SIW Butler matrix, Blass matrix, Nolen matrix, Rotman lens, R‐KR lens, reflector lens, and multimode lens. Integrated with proper antennas, compact and on‐substrate multibeam antenna arrays are achieved with good performance. Such a series of SIW BFNs and multibeam antennas present excellent candidates for low‐cost and mass‐reproducible applications in space‐ and ground‐based integrated systems with multiple beam capability.

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Novel butler matrix using CPW multilayer technology

Cited by 132 publications

References 19 publications

Novel Wideband Multilayer Butler Matrix Using Cb-CPW Technology

Novel Wideband Multilayer Butler Matrix Using Cb-CPW Technology

DESIGN AND IMPLEMENTATION OF A COMPACT PLANAR 4 x 4 MICROSTRIP BUTLER MATRIX FOR WIDEBAND APPLICATION

Substrate Integrated Multibeam Antennas

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