A quad-mode antenna for accurate polarimetric measurements over an ultra-wide field-of-view

Prinsloo, D.S.; Meyer, P.; Ivashina, Marianna; Maaskant, Rob

doi:10.1109/eucap.2014.6902524

Cited by 13 publications

(9 citation statements)

References 7 publications

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“…In practice, this can be realized through a multi-conductor transmission line allowing for the two modes to be excited, as e.g. in [3]. The reference design of this Vivaldi element was taken from previous studies [5], which was then modified to introduce the two slots and the monopole for dualmode operation, as explained above and shown in Fig.…”

Section: Dense Array Of MM Vivaldi Antennasmentioning

confidence: 99%

“…It has a maximum variation over the hemispherical FoV coverage of 7 dB. The far-field coverage of the MMA element design in [3] is also broad with a maximum gain variation of 3 dB over the FoV.…”

Section: Sparse Array Of MM Dipole Type Antennasmentioning

confidence: 99%

“…This reduction in gain at larger scan angles can be ascribed to the scan-angledependent array factor. It is interesting to see that the same array comprising the MMAs [3] achieves a variation in gain of the scanned beams as small as 5 dB over the entire FoV coverage, while the single-mode LBA array, in comparison, shows a gain reduction of approximately 8 dB, when scanned toward the horizon. 6.…”

Section: Sparse Array Of MM Dipole Type Antennasmentioning

confidence: 99%

“…The maximum gain function of scanned beams in E-plane (θscan = ±90 • ) for the irregular sparse array of 96 antennas for three types of antenna elements, i.e. ideal hemispheric pattern radiator, single-mode inverted V dipole antenna [6] and multi-mode dipole antenna (see the insertion) [3]. The LOFAR station at Onsala is taken here as the reference array layout.…”

Section: Sparse Array Of MM Dipole Type Antennasmentioning

confidence: 99%

“…This unified requirement for antenna elements with ultra-wide field-of-view (FoV) coverage for various applications not only results in multi-purpose antenna designs, but also in a synergy in the different methodologies by which the antenna performance is assessed [1]. Among these developments, Multi-Mode Antenna (MMA) elements are designed to support multiple radiating modes that can be excited individually; they can be either optimally (and adaptively) combined in a beamforming network to provide nearly hemispherical FoV coverage [2], [3] or be used independently as a base for exploiting antenna diversity and the possibility to transceive multiple data streams in MIMO systems [4]. Toward this goal, a number of MMA designs have been proposed and studied, mainly as isolated antenna elements whose modes are decoupled.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Capabilities and fundamental limitations of multi-mode antennas in an array environment

Ivashina

Redkina

Maaskant

et al. 2016

2016 10th European Conference on Antennas and Propagation (EuCAP)

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A numerical study on beam-steering arrays of multimode antenna (MMA) elements is presented. Each MMA is capable of supporting multiple orthogonal modes (e.g. differential and common modes) to increase the beam coverage or angular diversity of the array antenna. The goal is to investigate how the performance of such MMAs in terms of maximum scan range and bandwidth is modified by the array mutual coupling environment, in particular for dense regular arrays of connected MMA elements with an element spacing smaller than half wavelength. The final results for sparse irregular arrays are presented and considered to be the favorable array environment.Index Terms-array antennas, multi-mode antennas, differential and common modes.

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Section: Dense Array Of MM Vivaldi Antennasmentioning

confidence: 99%

Section: Sparse Array Of MM Dipole Type Antennasmentioning

confidence: 99%

Section: Sparse Array Of MM Dipole Type Antennasmentioning

confidence: 99%

Section: Sparse Array Of MM Dipole Type Antennasmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Capabilities and fundamental limitations of multi-mode antennas in an array environment

Ivashina

Redkina

Maaskant

et al. 2016

2016 10th European Conference on Antennas and Propagation (EuCAP)

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On techniques for optimal noise matching of a class of multimode antenna

Kenned

Meyer

2019

Int J RF Microw Comput Aided Eng

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This article investigates techniques to design noise‐matching networks for a class of multimodal antennas, specifically, the so‐called quad‐mode antenna. Such an antenna utilizes weighted combinations of four very dissimilar radiation patterns, and different modal input impedances, which vary across scan angle. The matching problem is therefore quite different from that of a classical array, where antenna elements are normally assumed to be similar. In addition to the standard techniques, a new, recursively averaged active impedance, is proposed and applied, as well one using a noise‐active impedance, and two optimization approaches. It is shown for the first time that the quad‐mode antenna displays excellent noise properties, with the simplest technique, namely that of matching to the self‐impedances, producing noise performances across all scan angles which are almost as good as the best solution found by all the techniques.

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Generalized multimode scattering parameters and the applications in antenna and radio frequency component designs

Liao

Che

et al. 2022

Int J RF Mic Comp-Aid Eng

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This article applies the generalized multimode S-parameters to multiport antennas and radio frequency (RF) components for CAD applications. Consider the special case of impedance matching which could significantly simplify the multimode representation on port and remove the requirement on calculating port impedance. N single-ended ports of a network are regarded as one generalized multimode port, supporting N orthonormal modes represented by N orthonormal basis vectors, respectively. By doing this, in antenna and RF component designs, one can only focus on specific modes interested, while ignore others. A multiport network's characteristics could be represented and understood in a much simpler manner because fewer but more intuitive physical quantities are considered. Therefore, this can significantly simplify the analysis, design, and optimization of multiport networks. For better illustration, several examples, including branch-line coupler, mixed-mode case, sequential rotation feeding antenna, and monopulse feed are analyzed and designed. Complicated analyses in network design using the single-ended S-parameters, including matching, amplitude and phase unbalance, could be converted into much simpler ones from the generalized multimode perspective.

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A quad-mode antenna for accurate polarimetric measurements over an ultra-wide field-of-view

Cited by 13 publications

References 7 publications

Capabilities and fundamental limitations of multi-mode antennas in an array environment

Capabilities and fundamental limitations of multi-mode antennas in an array environment

On techniques for optimal noise matching of a class of multimode antenna

Generalized multimode scattering parameters and the applications in antenna and radio frequency component designs

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