A 7–21 GHz Dual-Polarized Planar Ultrawideband Modular Antenna (PUMA) Array

Holland, Steven S.; Schaubert, D.H.; Vouvakis, Marinos N.

doi:10.1109/tap.2012.2207321

Cited by 167 publications

(49 citation statements)

References 23 publications

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“…Several designs have been presented in the literature, based on either slot or dipole elements, and have been shown to achieve broad impedance bandwidths within a large scanning range and low cross polarization. Slotbased designs were presented in [1] and more recently in [2], whereas dipole-based arrays were developed in [3]- [6]. By connected-dipole arrays we refer to elements that are either electrically connected or capacitively coupled as originally proposed in [7]: in both configurations, the broadband behavior is achieved by intentionally introducing high mutual coupling between the feeds.…”

Section: Introductionmentioning

confidence: 99%

Equivalent Transmission Line Models for the Analysis of Edge Effects in Finite Connected and Tightly Coupled Arrays

Cavallo

Syed

Neto

2017

IEEE Trans. Antennas Propagat.

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Abstract-In this paper we present an analysis of the edge effects in wideband connected arrays of slots and dipoles. Due to the strong mutual coupling between the elements, these arrays can support the propagation of guided waves along their surface. Such waves arise from the edges of the finite array and can be especially detrimental for the performance, since they can travel within the array without geometrical spreading. In this work we introduce Green's function based equivalent transmission line models to describe the propagation of the guided waves. The elements' active impedances are represented as periodic loads on these transmission lines. The equivalent models can be used as a simple and convenient tool to control and minimize the edge effects. Finite array simulations of relevant array structures are discussed. The evidence is that the active impedance and the inter-element capacitance can be tuned to attenuate and reflect the edge-born waves.

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Section: Introductionmentioning

confidence: 99%

Equivalent Transmission Line Models for the Analysis of Edge Effects in Finite Connected and Tightly Coupled Arrays

Cavallo

Syed

Neto

2017

IEEE Trans. Antennas Propagat.

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“…Although a number of accomplished UWB-ESAs have been proposed over the past decades [15][16][17][18][19][20][21][22][23] Most high-efficiency (low-loss) UWB-ESA apertures, certainly those that archive BWRs wider than 6:1 such as the Vivaldi array [24], are subject to an inherent bandwidth versus cross-polarization trade-off. A qualitative display of that tradeoff is presented in Fig.…”

Section: Problem Statementmentioning

confidence: 99%

“…To circumvent fabrication difficulties, lack of aperture modularity, and performancelimiting feeding methods that plague quasi-planar UWB arrays, the Planar Ultrawideband Modular Antenna (PUMA) array [96] GHz [23]. Despite exhibiting good performance, a hard bandwidth limit was imposed by the low-end loop modes spurring from the introduction of shorting vias [97].…”

Section: Planar Uwb Arraysmentioning

confidence: 99%

Low Cross-Polarization Vivaldi Arrays

Logan

Kindt

Vouvakis

2018

IEEE Trans. Antennas Propagat.

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ACKNOWLEDGMENTSI would like to begin by extending my gratitude for having the opportunity and privilege to study under the guidance of my advisor, Prof. Marinos Vouvakis, over the course of five years for my Master's and PhD research. His energy, drive, and motivation to not only teach but also to stimulate critical thinking, to invoke a practical mindset, and to create with meaning have left me with invaluable principles. I am indebted to him for challenging me and his endless patience and support throughout this research.I'd like to also thank Prof. Do-Hoon Kwon and Prof. Gopal Narayanan for serving on my dissertation committee and providing many insightful comments and support.I would like to additionally extend my gratitude to Prof. Robert Jackson, Prof.Paul Siqueira, and Prof. Joseph Bardin for serving on my research qualifying exam committee. Also, although I never had the pleasure of having him as a professor at UMass, I'd like to thank Prof. Dan Schaubert for taking the time to inadvertently introduce Vivaldi arrays to a curious kid at a phased array conference nearly six years ago; likewise thanks to Prof. Jorge Salazar for seeing some potential in that kid to encourage him to apply for graduate study at UMass. I appreciate it greatly. Ultra-wideband (UWB) electronically scanned arrays (ESA) with high efficiency, excellent polarization agility, and wide-scan matching remain essential for servicing multifunctional RF front-ends and other communications, sensing, and jamming or countermeasure systems. To this day, the most popular antenna array element in modern UWB-ESA systems is the Vivaldi, or flared notch, due to its superior widescan wide impedance bandwidth, well-known design guidelines, and practical embodiment versatility. Despite their popularity, these arrays tend to radiate unacceptably high cross-polarization levels, thus encouraging a great research opportunity.This dissertation presents the theory and design of a new class of UWB-ESAs, termed Sliced Notch Antenna (SNA) arrays, that remedy the high cross-polarization problems in Vivaldi arrays while maintaining their desirable impedance performance.The critical enabling insight of this work lays in revealing the nature of polarization viii purity or cross-polarization ratio (CPR) degradation in Vivaldi arrays to arise from a highly imbalanced ratio of longitudinal and transverse currents within the element.This work introduces a novel design strategy that intrinsically balances these currents over a UWB operating band, achieving decade-order (10:1) bandwidths and low cross-polarization. Moreover, the design approach is simple, intuitive, and can be implemented in a manner that does not inflate cost expenditures. In fact, the proposed topology can facilitate significantly reduced costs and manufacturing times

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“…Many of these designs were based on a costly three-dimensional assembly, where the array elements were realized on vertical printed circuit boards and arranged in an egg-crate configuration [4]. A planar implementation of connected dipole arrays was proposed in [7], with the advantage of cheaper and simpler manufacturing. More recently, the present authors proposed an alternative planar concept based on slot elements in [8].…”

Section: Introductionmentioning

confidence: 99%

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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A 7–21 GHz Dual-Polarized Planar Ultrawideband Modular Antenna (PUMA) Array

Cited by 167 publications

References 23 publications

Equivalent Transmission Line Models for the Analysis of Edge Effects in Finite Connected and Tightly Coupled Arrays

Equivalent Transmission Line Models for the Analysis of Edge Effects in Finite Connected and Tightly Coupled Arrays

Low Cross-Polarization Vivaldi Arrays

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

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