On the design of a single-layer wideband Butler matrix for switched-beam UMTS system applications [Wireless Corner]

Kaifas, Theodorοs N.; Sahalos, John N.

doi:10.1109/map.2006.323317

Cited by 30 publications

(17 citation statements)

References 22 publications

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“…3. The simulated results (access transitions are not included in the simulations) show a peak-to-peak error for the coupling coefficient less than 0.5 dB over the [11][12][13][14] GHz frequency band while isolation and reflection coefficients are below 20 dB with a relative phase difference which is almost constant at . Measured results are in good agreement with the simulated ones.…”

Section: Wideband Two-layer Siw Hybrid Couplermentioning

confidence: 99%

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Design and Implementation of Two-Layer Compact Wideband Butler Matrices in SIW Technology for Ku-Band Applications

Ahmed

Fonseca

Coccetti

et al. 2011

IEEE Trans. Antennas Propagat.

100

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The design and realization of a novel wideband twolayer 4 4 Butler matrix in substrate integrated waveguide (SIW) technology are addressed. The two-layer SIW design is exploited through a two-fold enhancement approach. The two-layer topology is first explored in a simple matrix layout with minimum number of components. A space saving design is then proposed making optimum use of the two-layer topology and the SIW technology leading to a significant size reduction. A two-level, low-loss, wideband SIW transition is designed and optimized using its equivalent circuit model. The two corresponding Butler matrix prototypes are optimized, fabricated and measured. Measured and simulated results are in good agreement. Isolation characteristics better than 15 dB with input reflection levels lower than 12 dB are experimentally validated over 24% frequency bandwidth centered at 12.5 GHz. Measured transmission magnitudes and phases exhibit good dispersive characteristics of 1 dB, around an average value of 6.8 dB, and 10 with respect to the theoretical phase values, respectively, over the entire frequency band. The impact of the measured transmission phases and magnitudes on the radiation pattern of a 4-element antenna array is also investigated.Index Terms-Beam forming networks, Butler matrix, multilayer, substrate integrated waveguide (SIW) technology.

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Section: Wideband Two-layer Siw Hybrid Couplermentioning

confidence: 99%

“…This leads to increased number of components with increased losses especially for larger matrices. In [12] a planar design with wideband performances is reported. However, the complete structure is rather adapted to microstrip technology as it requires wire bonding.…”

mentioning

confidence: 99%

Design and Implementation of Two-Layer Compact Wideband Butler Matrices in SIW Technology for Ku-Band Applications

Ahmed

Fonseca

Coccetti

et al. 2011

IEEE Trans. Antennas Propagat.

100

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“…One of the simplest design of a 3-dB coupler, which can offer wide BW, is an elliptic-patch quadrature-hybrid coupler (see Fig. 1a) [21,22]. The advantages include wide BW, small size and simple fabrication in a single-layer implementation.…”

Section: Elements Of the Antenna Arraymentioning

confidence: 99%

“…A few designs of planar wideband crossovers, based on Lange coupler [24], have previously been demonstrated in [22,25,26]. However, these designs are difficult to fabricate because of the required electrical connections between different sections of the Lange coupler.…”

Section: B the Design Of The Wideband Crossovermentioning

confidence: 99%

A Dual-Polarization-Switched Beam Patch Antenna Array for Millimeter-Wave Applications

Klionovski

Sharawi

Shamim

2019

IEEE Trans. Antennas Propagat.

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Increasing data transfer rates for future millimeter-wave communications require high capacity radio channels and user-centric communication network environments. Therefore, special requirements, such as wide-angle beam steering, wide operational frequency bandwidth and simultaneous operation with orthogonal polarizations are essential for telecommunication antennas. In this paper, we present a compact patch antenna array with a Butler matrix feed network for the frequency band of 26-31.4 GHz. The 16-element planar array has been designed to operate with two linear orthogonal polarizations and provide ±42º beam switching. To ensure wideband operation, a novel combination of planar couplers, crossovers and phase shifters is designed to form the Butler matrix. A new phase shifter topology is used which is based on a combination of open-short stubs and Shiffman phase shifter. The design is fabricated on a low-cost multi-layer board with a size of 120x70x1.62 mm 3. The size of the feeding network, which is implemented on a single board, is 76x23x0.1 mm 3. Experimental measurements of return loss, mutual coupling and radiation patterns confirm simulated results.

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“…M is the number of input/output ports that give a set of M different beams. In (Kaifas & Sahalos, 2006), the reader can find a comprehensive review of the BM functionality and its implementation issues. A SBS needs a Switching Network (SN) in order to select the appropriate beam to receive the signal from a particular Mobile Station (MS).…”

mentioning

confidence: 99%

Beamforming in 3G and 4G Mobile Communications: The Switched-Beam Approach

Gotsis¹,

Sahalos²

2011

Recent Developments in Mobile Communications - A Multidisciplinary Approach

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On the design of a single-layer wideband Butler matrix for switched-beam UMTS system applications [Wireless Corner]

Cited by 30 publications

References 22 publications

Design and Implementation of Two-Layer Compact Wideband Butler Matrices in SIW Technology for Ku-Band Applications

Design and Implementation of Two-Layer Compact Wideband Butler Matrices in SIW Technology for Ku-Band Applications

A Dual-Polarization-Switched Beam Patch Antenna Array for Millimeter-Wave Applications

Beamforming in 3G and 4G Mobile Communications: The Switched-Beam Approach

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