The design of wideband arrays of closely-spaced wire and slot elements

Munk, Ben A.; Janning, Dan; Marheka, Ronald J.; McCann, Joshua C; Schneider, Stephen W.

doi:10.1109/aps.2010.5561762

Cited by 5 publications

(3 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For the real part of the Z x , the value is independent of frequency. For the imaginary part, since the imaginary part of the PUMA input impedance is mainly related to the distance from the antenna plane to the reflective ground [19], the imaginary part of Z x has little influence. In general, the impedance of the structure same with Z x theoretically has ultra-wideband characteristics.…”

Section: Theory and Simulation A Theory And Analysis Of The Utlwmentioning

confidence: 99%

A Low-Profile and Wide-Angle Scanning Planar Ultrawideband Modular Antenna With Ultra-Thin Loading Window

et al. 2022

View full text Add to dashboard Cite

Ultrawideband phased antenna array has been widely used in communications, radars and detection. However, the high profile and poor wide-angle scanning characteristics have always been the critical limitation for many available ultrawideband antenna applications. In this paper, an ultra-thin loading window (UTLW) is proposed to replace the wide-angle impedance matching (WAIM) superstrate in the planar ultrawideband modular antenna arrays (PUMA), and reduces the profile height greatly. The UTLW consists of two strips in parallel, and each strip is loaded with two resistors and one capacitor. Following the equivalent circuit model (ECM) of the PUMA, the resistance and capacitance are specially designed to make the complex impedance of the UTLW equal to the impedance introduced by the WAIM. A dual-polarized PUMA with an UTLW achieves 6-18 GHz impedance bandwidth with active VSWR≤2.6 for scanning up to 60 • and active VSWR≤3 for scanning up to 70 • in E/D/H plane. The profile height of the proposed PUMA is only less than 0.07λ l , or, 0.24λ h with reference to the typical Nyquist half-wavelength spacing frequency. A 20×20 prototype PUMA with the UTLW was fabricated and its measured results were found consistent with the simulation results.INDEX TERMS Planar ultrawideband modular antenna (PUMA), ultra-thin loading window (UTLW), low-profile, wide-angle scanning

show abstract

Section: Theory and Simulation A Theory And Analysis Of The Utlwmentioning

confidence: 99%

A Low-Profile and Wide-Angle Scanning Planar Ultrawideband Modular Antenna With Ultra-Thin Loading Window

et al. 2022

View full text Add to dashboard Cite

show abstract

“…This kind of coupling capacitors just helps to off-set the inductive effect of the floor at low frequency, thus effectively expanding the low frequency bandwidth, and this kind of antenna is called TCDA (tightly coupled dipole antenna). [1] The PUMA antenna proposed by Vouvakis in 2010 is a novel form of tightly coupled antenna. [2] Compared with the TCDA antenna originally proposed by Professor Munk's team, this antenna does not apply any external baluns, and has a simple feed structure.…”

Section: Introductionmentioning

confidence: 99%

A novel Ultra-wideband Wide-angle scanning Dual-polarized antenna with multilayer dielectric

Zhou

Quan

Cao

et al. 2022

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

In this paper, a dual-polarized planar ultra-wideband modular antenna (PUMA) with wide-scanning angle matching layers is proposed. The multiple dielectric layers and frequency selective surfaces (FSS) are loaded on the dipoles. Each frequency selective surface is etched on the dielectric plate as one wide-angle -matching layer. By applying three wide-angle-matching layers, the wide-scanning angle performance is guaranteed. As for the ultra-wideband performance, a metal cylinder is added to the lower space between adjacent dipoles, and the upper end of the cylinder has a certain distance from the dipole. This forms a “ridge” structure which shift problematic common-mode resonances caused by circulating current out of band. A dual-polarized 256-port array (16×16) is set and simulated. The simulation result indicates that the proposed antenna operating over 4.79GHz -20.15GHz (4.20:1) achieves VSWR<3 while scanning to 60° in E-plane and D-plane, and to 45° in H-plane respectively.

show abstract

“…The current sheet array (CSA) developed by Munk et al [12] is one of the first realizations of Wheeler's current sheet incorporating a ground plane. This is based on the principle that a metallic ground plane next to a CSA can be treated as a simple inductance (Z GP = j Z 0 tanβd, where d is the distance from the array to the ground plane), at the input terminals of the array [13]. By introducing end tip capacitors between the dipole elements, this dominating inductance is largely cancelled and an approximate sinusoidal current distribution is maintained over a wide bandwidth.…”

Section: Introductionmentioning

confidence: 99%