Design And Breadboarding Of Wideband Nxn Butler Matrices For Multiport Amplifiers

Piovano, B.; Accatino, L.; Angelucci, A.; Jones, Tina; Capece, P.; Votta, M.

doi:10.1109/sbmo.1993.589533

Cited by 22 publications

(8 citation statements)

References 2 publications

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“…A broadband performance is achieved over the extended frequency band from 11.5 GHz to 13.5 GHz. The maximum dispersion in the transmission magnitudes is +0.31dB/-0.76dB while the maximum phase dispersion is +3.73°/-0.05° with respect to the required theoretical scattering parameters given by (1). Over the nominal bandwidth from 12 to 13 GHz, the amplitude and phase dispersion are +0.05dB/-0.33dB and +1.12°/-0.05°.…”

Section: Wideband 4 X 4 Butler Matrix Implementation In Siw Technologymentioning

confidence: 83%

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Novel two-layer broadband 4 × 4 Butler matrix in SIW technology for Ku-band applications

Ahmed

Fonseca

Coccetti

et al. 2008

2008 Asia-Pacific Microwave Conference

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Section: Wideband 4 X 4 Butler Matrix Implementation In Siw Technologymentioning

confidence: 83%

“…The presence of path crossings in the matrix structure often imposes the use of extra 0dB couplers -usually obtained using back to back pairs of 3dB couplers -for planar realizations [1]. Specific designs that overcome the use of 0dB couplers can be found, but these realizations may not be easily generalized to larger matrices [2,3].…”

Section: Introductionmentioning

confidence: 99%

Novel two-layer broadband 4 × 4 Butler matrix in SIW technology for Ku-band applications

Ahmed

Fonseca

Coccetti

et al. 2008

2008 Asia-Pacific Microwave Conference

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“…To overcome this problem, some specific designs have been suggested but they are not easily scalable for larger matrices [9], [10]. Another method for single-layer realizations is to employ extra 0 dB couplers by means of back-to-back pairs of 3 dB couplers to produce the crossover transfer function [3], [11]. This leads to increased number of components with increased losses especially for larger matrices.…”

mentioning

confidence: 99%

“…The theoretical scattering parameters relating the outputs to the inputs of the matrix of Fig. 1 is given by (3). The 8 8 scattering matrix of the entire Butler matrix consists of (3) as the lower left quadrant and its transpose as the upper right one.…”

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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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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“…A planar 4x4 matrix can be obtained by substituting the crossover in the center with a 0 dB branchline coupler. Owing to the symmetry of this network, signal recombination at the end of the cascade of two identical matrices connected back-to-back is achieved independently on the value of the phaseshifts present on the external branches [4]. The 4x4 matrix layout is shown in Figure 1.…”

Section: Transmit Combining Networkmentioning

confidence: 99%

Evolution of microstrip components for mobile communication systems

Angelucci

Audagnotto

Corda

et al.

Proceedings of 1994 3rd IEEE International Conference on Universal Personal Communications

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This paper present the development of advanced components to minimize the size and improve the reliability and performance of transceivers of mobile systems. In particular, mu1 tiport hybrid networks based on the Butler matrix concept and an innovating type of phase-shifters, able to provide a very accurate phase equalization over a wide frequency band, are shown. The technology used is the thick film microstrip and the applications are the antennas of cellular DCS 1800 (ground mobile), in view of the integration of ground and satellite communication equipments. A Butler matrix can advantageously be used as a key element of multiport power amplifiers (MPA's) and as a transmit combining network in place of other solutions employing filters or couplers. Prototypes of these components, designed using Libra software (by Eesof) to operate over the 1.7-1.9 GHz band, were manufactured on Rogers RT6006 and RT5880 Duroid substrates. It is to be noticed that the microstrip technology used for DCS applications at 1.8 GHz can easily be transferred to satellite mobile systems at 1.6 GHz and to cellular based PCN (2-2.5 GHz Band).

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Design And Breadboarding Of Wideband Nxn Butler Matrices For Multiport Amplifiers

Cited by 22 publications

References 2 publications

Novel two-layer broadband 4 × 4 Butler matrix in SIW technology for Ku-band applications

Novel two-layer broadband 4 × 4 Butler matrix in SIW technology for Ku-band applications

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

Evolution of microstrip components for mobile communication systems

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Design And Breadboarding Of Wideband Nxn Butler Matrices For Multiport Amplifiers

Cited by 22 publications

References 2 publications

Novel two-layer broadband 4 &#x00D7; 4 Butler matrix in SIW technology for Ku-band applications

Novel two-layer broadband 4 &#x00D7; 4 Butler matrix in SIW technology for Ku-band applications

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

Evolution of microstrip components for mobile communication systems

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Product

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Novel two-layer broadband 4 × 4 Butler matrix in SIW technology for Ku-band applications

Novel two-layer broadband 4 × 4 Butler matrix in SIW technology for Ku-band applications