A Comparison of Dual-Polarized, Periodic Arrays of Coincident and Noncoincident Phase Center Radiators

Holzman, E.L.

doi:10.1109/tap.2012.2230238

Cited by 3 publications

(3 citation statements)

References 9 publications

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“…Lastly, although only an analysis with linear polarization was conducted, the procedure could be extended to dual-polarized arrays with circular polarization as well with similar conclusions as done for coincident and noncoincident phase dipole arrays in [116].…”

Section: Single Section Resultsmentioning

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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Section: Single Section Resultsmentioning

confidence: 99%

Low Cross-Polarization Vivaldi Arrays

Logan

Kindt

Vouvakis

2018

IEEE Trans. Antennas Propagat.

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“…For the proposed dual-polarized antenna structure to be useful for practical applications, it is necessary to evaluate the effect of the phase center offset on the antenna polarization purity over the operating frequency range. The phase center of an antenna is a point at which the far field emanates, i.e., all the electromagnetic field waves radiated from the antenna elements have equal phase front along the spherical curvature at that imaginary point [37][38][39].…”

Section: Phase Center Of the Dual-polarized Dipole Elementsmentioning

confidence: 99%

Wideband and Dual-Polarized Crossed Dipole Antenna Design Using Substrate-Integrated Coax

Biswas¹

2023

IEEE Open J. Antennas Propag.

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A wideband and dual-polarized dipole antenna design technique is presented. The proposed antenna employs two sets of dipole elements in orthogonal configuration and separated by a dielectric layer. The dipole elements are excited with two separate substrate-integrated-coaxial feeds to achieve high port-toport isolation and the overall antenna stackup is enclosed in a substrate-integrated-waveguide (SIW) cavity.To validate the proposed substrate-integrated-coaxial fed dual-polarized antenna design method, a prototype antenna was fabricated using standard multilayer printed circuit board (PCB) manufacturing technologies to operate in the Ku-band. The measured and simulated results exhibit that the designed antenna has a wide impedance bandwidth of less than -10dB reflection coefficients at 10.28-14.8GHz and the port-to-port isolation between the two orthogonally polarized dipole antenna ports is greater than 20dB at most frequencies, making it suitable for many applications such as satellite communications. The antenna has a relatively stable gain pattern with a gain value of 5.5-6.5dBi and a low cross-polarization level (<16dB) over the operating frequency range.INDEX TERMS Dual-polarization, wide bandwidth, high port-to-port isolation, low cross-polarization, substrate-integrated-waveguide (SIW), printed circuit board (PCB) antennas, substrate-integrated coax

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“…For example, at large scanning angles in the diagonal plane, the angle between two far-field electric vectors radiated by a dual-polarized antenna is far smaller than 90 , and approaches 0 in the limit. This property of dual-polarized antenna leads to serious crosspolarization [3] [4] or polarization distortions [5] when scanning at large angles. Controlling both amplitudes and phases of the weights can compensate the polarization distortions, but necessarily involves considerable power loss [3].…”

Section: Introductionmentioning

confidence: 99%

Radiation Characteristics Analysis of Tri-Polarized Dipole Antenna

Wang

et al. 2016

Antennas Wirel. Propag. Lett.

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Dual-polarized antenna involves polarization purity degradation and power gain loss when scanning at wide angles. Aiming at mitigating above limitations, we exploit tri-polarized antenna for better radiation characteristics in this paper. We formulate the beam pattern synthesis problem of a single tripolarized dipole antenna in a convex form, and solve it with the Lagrange multiplier method. When circular polarization is synthesized, we show that degree of freedom increase improves the polarization purity and power gain of the multi-polarized antenna, especially at wide scan angles. And we further find that using the infinite current sheet model, the radiation pattern synthesized by tri-polarized antenna is the same with the optimally oriented dual-polarized antenna -the dual-polarized antenna is mechanically rotated to be oriented normally to the scanning direction. We discuss the situation when linear polarization is synthesized. We show that the power gain is increased corresponding to scan angle, while the polarization purity is not improved obviously.

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A Comparison of Dual-Polarized, Periodic Arrays of Coincident and Noncoincident Phase Center Radiators

Cited by 3 publications

References 9 publications

Low Cross-Polarization Vivaldi Arrays

Low Cross-Polarization Vivaldi Arrays

Wideband and Dual-Polarized Crossed Dipole Antenna Design Using Substrate-Integrated Coax

Radiation Characteristics Analysis of Tri-Polarized Dipole Antenna

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