Low-loss compact Butler matrix for a microstrip antenna

Bona, Michele; Manholm, Lars; Starski, J.P.; Svensson, B. G.

doi:10.1109/tmtt.2002.802318

Cited by 163 publications

(66 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This structure has dimensions of 611.06 × 424.91 mm 2 . As it was mentioned earlier, we can omit the crossovers from the conventional structure [7,8]. Fig.…”

Section: Proposed Butler Matrix Architecturementioning

confidence: 99%

See 1 more Smart Citation

A novel Butler matrix feeding system for BST multi-band antennas

Rezvani

Nikmehr

Ghanbari

2013

IEICE Electron. Express

View full text Add to dashboard Cite

In this article a novel feeding system for BST Multiband Antennas is presented. This system is based on a 4 × 4 Butler matrix that uses a novel triple band hybrid. This hybrid operates on GSM900, DCS1800 and UMTS2100 bands. The presented novel implementation technique in the triple band hybrid can also be used in other application. The Butler matrix network is fabricated on FR4 substrate and the simulated and measured results are presented.

show abstract

“…This structure has dimensions of 611.06 × 424.91 mm 2 . As it was mentioned earlier, we can omit the crossovers from the conventional structure [7,8]. Fig.…”

Section: Proposed Butler Matrix Architecturementioning

confidence: 99%

“…The number of couplers or hybrids used in a Butler matrix is N × n/2. Crossovers have narrow bandwidth, increase insertion loss, and occupy more space, therefore, some researcher have implemented some configuration without crossovers [7,8].…”

Section: Introductionmentioning

confidence: 99%

A novel Butler matrix feeding system for BST multi-band antennas

Rezvani

Nikmehr

Ghanbari

2013

IEICE Electron. Express

View full text Add to dashboard Cite

show abstract

“…The traditional way used in beamforming networks to isolate the signals on the intersection is to use a three-dimensional structure, e.g., bond wires, air bridges or multi-layer structures [3][4][5][6][7]. The use of those non-planar structures increases the fabrication complexity and cost significantly.…”

Section: Introductionmentioning

confidence: 99%

Compact Planar Microstrip Crossover for Beamforming Networks

Henin

Abbosh²

2012

PIER C

View full text Add to dashboard Cite

Abstract-The design of a fully planar microstrip crossover for beamforming networks is presented. The design starts by using a conventional half-wavelength square patch and two sets of orthogonal feeding lines. Rectangular and circular slots are introduced on the square patch in order to reduce the required area of the patch by 82%. The proposed crossover is fabricated and tested for performance confirmation. The measured data shows less than 1 dB insertion loss, more than 13 dB isolation, and around 0.1 ns deviation in the group delay across 12% fractional bandwidth. The proposed crossover is suitable for planar Butler matrix which is a key component in beamforming networks.

show abstract

“…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%

“…A 4 × 4 microstrip Butler matrix without crossing is reported in [12], which is not valid for an 8 × 8 configuration. Suspended strip lines with multilayer structure have also been studied in [13]. Main drawbacks of this structure are its narrow bandwidth in addition to the complexity of the design.…”

mentioning

confidence: 99%

Novel Wideband Multilayer Butler Matrix Using Cb-CPW Technology

Kilani¹,

Nedil²,

Kandil³

et al. 2012

PIER C

View full text Add to dashboard Cite

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.

show abstract

Low-loss compact Butler matrix for a microstrip antenna

Cited by 163 publications

References 4 publications

A novel Butler matrix feeding system for BST multi-band antennas

A novel Butler matrix feeding system for BST multi-band antennas

Compact Planar Microstrip Crossover for Beamforming Networks

Novel Wideband Multilayer Butler Matrix Using Cb-CPW Technology

Contact Info

Product

Resources

About