A wide band low profile dual-pol &amp;#x201C;Thumbtack&amp;#x201D; array

Livingston, S.; Lee, J. J.

doi:10.1109/array.2010.5613323

Cited by 12 publications

(6 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, they require dispersive ferro-electric substrate loading to mitigate reflection from the array's ground plane backing. The dual-polarized "Thumbtack" version of this array is limited to 3:1 bandwidth only [7].…”

Section: Overview Of Wideband Esa Technologiesmentioning

confidence: 99%

Charateristics of decade-bandwidth, Balanced Antipodal Vivaldi Antenna (BAVA) phased arrays with time-delay beamformer systems

Elsallal

West

Wolf

et al. 2013

2013 IEEE International Symposium on Phased Array Systems and Technology

View full text Add to dashboard Cite

The first part of this paper presents measured performance of the Balanced Antipodal Vivaldi Antenna (BAVA) with U-shaped metallic channels. This new BAVA array is dual polarized with decade bandwidth and wide scan volume. Its depth is half-wavelength at the highest frequency of operation. It can be constructed as modular individual BAVA elements or as a subarray with integrated transmitter / receiver (T/R) modules. This is a unique feature that reduces manufacturing complexity and the cost of field repair. The second part of this paper overviews performance of the BAVA array scanned at wide scan angles using AFRL's Transformational Element Level Array (TELA) Time-Delay Units between 2 GHz to 8 GHz and using fixed delay lines between 2 GHz to 18 GHz. The authors offer guidelines for minimum aperture size to realize decade bandwidth beam scan performance without beam squinting at the lower end of the frequency band.

show abstract

Section: Overview Of Wideband Esa Technologiesmentioning

confidence: 99%

Charateristics of decade-bandwidth, Balanced Antipodal Vivaldi Antenna (BAVA) phased arrays with time-delay beamformer systems

Elsallal

West

Wolf

et al. 2013

2013 IEEE International Symposium on Phased Array Systems and Technology

View full text Add to dashboard Cite

show abstract

“…The Vivaldi antenna and connected dipoles have often been the printed elements of choice for array applications. Many array concepts based on these radiator types have been published in literature [1][2][3][4]. However, the Vivaldi elements are not well suited for application in planar broadside radiating arrays.…”

Section: Introductionmentioning

confidence: 99%

Improving bandwidth of planar microstrip patch array antennas

Valavan

Knott

2015

2015 German Microwave Conference

View full text Add to dashboard Cite

The case of improving bandwidth of planar patch antennas is investigated. More specifically, the analysis deals with slot-loaded patch antennas. The use of a combined feeding apparatus capable of providing 'reactance-balance', and thereby improving bandwidth, is presented. The effectiveness of this simple technique in achieving nearly 35% fractional bandwidth is demonstrated using experimental measurements

show abstract

“…The elements in these arrays are contiguously connected to form continuous current sheets that can be modeled as an array of center-fed periodically-spaced (typically λ H /2) dipoles attached at the adjoining ends. The long slot and thumbtack arrays achieve 4:1 bandwidth with low cross-polarization (CPR<-15 dB) with non-lossy ground planes [88,89]. Although a few of the discussed arrays can exhibit UWB performance with >8:1 BWRs, they also require the use of additional lossy devices and components.…”

Section: "Quasi-planar" Uwb Arraysmentioning

confidence: 99%

“…1.21 and the long slot and thumbtack arrays [17,[87][88][89] in Fig. 1.22 use connected electric or "magnetic" elements, respectively, that could yield infinite bandwidth if radiating in free space and infinite array configurations, but when unidirectional (half-space) radiation is needed, bandwidths are limited by resonances due to the introduction of a ground plane beneath the radiating layer.…”

Section: "Quasi-planar" Uwb Arraysmentioning

confidence: 99%

See 1 more Smart Citation

Low Cross-Polarization Vivaldi Arrays

Logan

Kindt

Vouvakis

2018

IEEE Trans. Antennas Propagat.

View full text Add to dashboard Cite

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

show abstract

A wide band low profile dual-pol “Thumbtack” array

Cited by 12 publications

References 7 publications

Charateristics of decade-bandwidth, Balanced Antipodal Vivaldi Antenna (BAVA) phased arrays with time-delay beamformer systems

Charateristics of decade-bandwidth, Balanced Antipodal Vivaldi Antenna (BAVA) phased arrays with time-delay beamformer systems

Improving bandwidth of planar microstrip patch array antennas

Low Cross-Polarization Vivaldi Arrays

Contact Info

Product

Resources

About