Never ending saga of phased array breakthroughs

Brookner, Eli

doi:10.1109/array.2010.5613392

Cited by 17 publications

(8 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…For example, a recent plenary paper by Dr. Eli Brookner of Raytheon [30] revealed that "Raytheon has demonstrated a notch radiating element that is capable of going from 1.8 to 18 GHz, a 10:1 bandwidth [5,79]. It can be dual polarized and scanned to 60° [5,79].…”

Section: Its Top and Cross-sectional Views Have Been Shown Inmentioning

confidence: 99%

Traveling-Wave Antenna (TWA) array as a thin Multioctave Planar Phased Array (MPPA)

Wang

2013

2013 IEEE International Symposium on Phased Array Systems and Technology

View full text Add to dashboard Cite

Multioctave Planar Phased Arrays (MPPA) have advanced rapidly since 2000. Today, MPPA technology and its market needs appear to be nearing a point of convergence. This paper reviews the history of thin MPPAs, which exclude the Vivaldi antenna type, and presents modern planar TravelingWave Antenna (TWA) array as a thin MPPA. The differentiating features of modern planar TWA array from other thin MPPAs, and its potential high performance and other advantages, are discussed. Certain controversies in the theory and measurement of MPPAs are also reviewed and clarified. A planar TWA array design, with SEG breadboard demonstration, is presented to show potential performance of low VSWR, high-efficiency (low loss), scan angle ≤60° off broadside, over a 6:1 bandwidth and beyond.

show abstract

Section: Its Top and Cross-sectional Views Have Been Shown Inmentioning

confidence: 99%

Traveling-Wave Antenna (TWA) array as a thin Multioctave Planar Phased Array (MPPA)

Wang

2013

2013 IEEE International Symposium on Phased Array Systems and Technology

View full text Add to dashboard Cite

show abstract

“…The numerator term (1 + κ m ) in ζ m is the excess beamformer output noise contribution, normalized by S ef f 21,m , of the mth LNA due to coupling of its c 1 as first appeared in (6). The denominator (1 + Γ s,m S 11 κ m ) in ζ m accounts for nonperfect terminations at antenna ports and is the normalized beamformer output contribution of coupled noise reflected back to the LNA input.…”

Section: ) Input-referred Effective Available Noise Power Andmentioning

confidence: 99%

“…In cryogenic applications, the noise added by the isolator could be negligible 6. An option of setting S 11 Γs,m ≈ 1, which makes Γ ef f s,m ≈ Γs,m regardless of κm, is ignored as it is not practical.…”

mentioning

confidence: 99%

Low-Noise Amplifier Design Considerations For Use in Antenna Arrays

Belostotski

Veidt

Warnick

et al. 2015

IEEE Trans. Antennas Propagat.

View full text Add to dashboard Cite

This work analyzes the implications of noise coupling in arrays of antennas on the design of low-noise amplifiers (LNAs). To select LNA design parameters in a manner familiar to LNA designers, the effective noise temperatures T ef f of LNAs are presented. The effect of beamformer coefficients and antenna coupling on T ef f is analyzed in a manner similar to a stand-alone LNA analysis. This leads to the proposed LNA design strategy of selecting LNA Γopt near the reflection coefficient of antenna ports and selecting the largest practical |S11| with a proper phase. This strategy is based on the assumption that the antenna array may be used for various beamforming and nonbeamforming applications, unknown at the time of the design. Numerical simulations of a 38-and 41-element antenna arrays show that a global search of LNA S11 and Γopt, which result in the minimum average beamequivalent receiver noise temperature Trec, finds nearly identical results to the proposed LNA design strategy. For a 41-element array with high antenna coupling at low frequencies, the proposed method shows as much as 80% improvement in the Trec over conventional LNA design strategies that do not account for the intended use of the amplifier in an array.

show abstract

“…Antenna arrays see ever‐expanding application in communications (e.g. emerging 5G and 6G systems, massive, and holographic MIMO systems), radar, radio astronomy, magnetic resonance imaging, remote sensing, signal intelligence, and spectrum sensing [1–11]. Past research showed that minimizing the noise of a receiving antenna array requires the optimum reflection coefficient for minimum noise,

{normalΓ}_{opt} \in C

, of the receiver front‐end low‐noise amplifier (LNA) to equal the ‘active’ reflection coefficient,

{normalΓ}_{act} \in C

, of the antenna array [12–16].…”

Section: Introductionmentioning

confidence: 99%

Impact of bandwidth on antenna‐array noise matching

Ali

Belostotski

Messier

et al. 2021

Electronics Letters

View full text Add to dashboard Cite

This letter expands the treatments of wideband noise analysis of antenna arrays by including bandwidth effects on beam-equivalent receiver noise temperature, T rec , and the active reflection coefficient, act. The particular focus of the letter is on receiver noise decorrelation in wideband systems having noise bandwidth f B 1 Hz. The new analysis and simulations show increase in T rec and the departure of act from that obtained using contemporary analyses for f B =1 Hz. Although the paper also shows that for many applications over moderate bandwidths and close connection between the receiver and array the influence of f B on T rec is not significant, the simulations of a 71-element array demonstrate that the noise decorrelation due to wide f B can result in tens of percent (as much as 45.5% in simulations described in this letter) increase in T rec above the low-noise amplifier minimum noise temperature, which should be taken into account at the design stage of ultrawide band systems, such as those under investigation by, for example, the Defense Advanced Research Project Agency (DARPA) in its wideband adaptive RF protection (WARP) program and ultra-sensitive active electronically scanned array (AESA) radars for tracking stealth objects.

show abstract

Never ending saga of phased array breakthroughs

Cited by 17 publications

References 35 publications

Traveling-Wave Antenna (TWA) array as a thin Multioctave Planar Phased Array (MPPA)

Traveling-Wave Antenna (TWA) array as a thin Multioctave Planar Phased Array (MPPA)

Low-Noise Amplifier Design Considerations For Use in Antenna Arrays

Impact of bandwidth on antenna‐array noise matching

Contact Info

Product

Resources

About