Common-mode resonances in ultra wide band connected arrays of dipoles: Measurements from the demonstrator and exit strategy

Cavallo, Daniele; Neto, A.; Gerini, G.

doi:10.1109/iceaa.2009.5297402

Cited by 8 publications

(5 citation statements)

References 10 publications

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“…The weight are determined by observing the complex amplitudes of the two components of the radiated field in the direction of scanning. It is important to note that similar cancellations can be obtained only over very narrow bandwidth when the crosspolarization is caused by common-mode resonances within the feeding lines [12]. Since the feed structure for the slot element does not support common-mode propagation, one set of weights for the two orthogonal ports leads to cross-polarization lower than -10 dB over a large frequency band.…”

Section: A Array Performancementioning

confidence: 95%

A 5:1 connected slot array loaded with artificial dielectric layers

Cavallo

Syed

Neto

2016

2016 IEEE International Symposium on Phased Array Systems and Technology (PAST)

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We propose a radiation concept to realize phased arrays with wideband and wide-scanning performance. The array is based on connected-slot elements that radiate in the presence of artificial dielectric superstrates. The array can be implemented with a single multi-layer printed circuit board. Artificial dielectrics are used in place of real dielectrics to minimize the losses due to surface waves and avoid the occurrence of scan blindness over a wide scan range. The achievable bandwidth depends on the number of layers composing the artificial dielectric. A design example is shown that achieves a bandwidth (VSWR ) of about when scanning up to in all azimuth planes. Both single-and dualpolarization designs can be implemented.

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Section: A Array Performancementioning

confidence: 95%

A 5:1 connected slot array loaded with artificial dielectric layers

Cavallo

Syed

Neto

2016

2016 IEEE International Symposium on Phased Array Systems and Technology (PAST)

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“…The derivation of such a set of noise parameters is presented in the Appendix, and summarized in (8) for the case of two identical and isolated LNAs of which the noise contributions are uncorrelated. In (8), R n , F min , and Y opt are the standard SE noise parameters.…”

Section: B Mixed-mode Circuit Analysismentioning

confidence: 99%

“…Together with (8), and for identical SE LNAs, each with optimum source reflection coefficient Γ opt , this results in…”

Section: Dm Noise Parameters CM Noise Parametersmentioning

confidence: 99%

Mixed-Mode Sensitivity Analysis of a Combined Differential and Common Mode Active Receiving Antenna Providing Near-Hemispherical Field-of-View Coverage

Prinsloo

Maaskant

Ivashina

et al. 2014

IEEE Trans. Antennas Propagat.

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A theoretical framework for a mixed differential and common mode sensitivity analysis of active receiving antennas is presented, which includes the derivation of a novel set of noise parameters for dual-mode balanced amplifiers. The analysis is applied to an example of a mixed-mode active wire antenna design, consisting of an integrated monopole and dipole structure. Results of numerical simulations and experimental measurements are presented which show that, for a single-polarized design, the judicious use of both differential and common modes enables the field-of-view coverage to be extended over the entire hemisphere with a variation in receiving sensitivity of less than 3dB in the E-plane.

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“…While achieving good performance in general, many of these antennas suffer from a limited FoV, as well as common mode resonances which degrade the performance at certain scan angles [3], [4]. To alleviate both these problems, a dual-mode antenna element, utilising both differential and common mode excitations, has recently been proposed by the authors, and shown to have substantial improvement in FoV coverage when compared to conventional purely differential antennas [5].…”

Section: Introductionmentioning

confidence: 98%

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

Prinsloo

Meyer

Ivashina

et al. 2014

The 8th European Conference on Antennas and Propagation (EuCAP 2014)

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The polarimetric performance of a quad-mode antenna element, consisting of a pair of crossed dipoles and an integrated monopole fed by a quadraxial transmission line, is analysed. Results are compared to a conventional dual-polarised antenna consisting of two orthogonal dipoles. The presented study shows that the quad-mode antenna effectively doubles the polarimetric capabilities of a dual-polarised antenna over the hemispherical field of view.

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Common-mode resonances in ultra wide band connected arrays of dipoles: Measurements from the demonstrator and exit strategy

Cited by 8 publications

References 10 publications

A 5:1 connected slot array loaded with artificial dielectric layers

A 5:1 connected slot array loaded with artificial dielectric layers

Mixed-Mode Sensitivity Analysis of a Combined Differential and Common Mode Active Receiving Antenna Providing Near-Hemispherical Field-of-View Coverage

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

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