Conjugate Impedance Matching Method for Wideband and Wide-Angle Impedance Matching Layer With 70° Scanning in the H-Plane

Hu, Chang-Hai; Wang, Bing‐Zhong; Gao, Guo-Feng; Ren, Wu; Xiao, Shaoqiu; Ding, Xiao

doi:10.1109/lawp.2020.3039521

Cited by 21 publications

(9 citation statements)

References 11 publications

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“…The superstrate is used to improve scan performance in the H plane. To design a superstrate with better performance, we calculate the Floquet impedance Z up when scanning in the H plane at the upper face of the antenna array as shown in Figure 3A 12 . The inductive Floquet impedance decreases, while the scan angle increases.…”

Section: Antenna Design and Simulationmentioning

confidence: 99%

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An ultrawide‐angle scanning tightly coupled dipole array with double‐layer double‐sided frequency selective surface superstrate

Tong

Wang

Ren

2021

Int J RF Mic Comp-Aid Eng

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In this article, we present an ultrawide‐angle scanning tightly coupled dipole array (TCDA). The impedance match issue is a major challenge in the design of ultrawide‐angle scanning TCDA. To overcome this issue, we employ a multi‐stage wideband balun and design the balun synergistically with the dipole element to improve impedance match performance. A double‐layer double‐sided (DLDS) superstrate is exploited to further improve scanning performance in the H plane. The capacitance of the DLDS Frequency Selective Surface (FSS) superstrate is used to counteract the inductance at the upper face of the antenna array to improve impedance match at different scanning angles. The DLDS FSS superstrate has similar performance with the equivalent double‐layer dielectric superstrate, but with advantages of light weight, low cost, and low cross‐polarization level at high frequencies. Consequently, the proposed TCDA has a bandwidth of 2.4:1 (2.1–5 GHz) with VSWR<3, while scanning up to 80° in the E plane, 70° in the H plane, and 75° in the D plane, respectively. A 16 × 16 prototype was fabricated and measured, showing good agreement with the simulated results.

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Section: Antenna Design and Simulationmentioning

confidence: 99%

“…Loaded with the FSS superstrate, the TCDA achieves 6.1:1 bandwidth while scanning up to 70° in the E plane and 60° in the H plane. Loaded with a multilayer FSS superstrate, the TCDA achieves 5:1 bandwidth, while scanning up to 70° in all planes 12 …”

Section: Introductionmentioning

confidence: 99%

An ultrawide‐angle scanning tightly coupled dipole array with double‐layer double‐sided frequency selective surface superstrate

Tong

Wang

Ren

2021

Int J RF Mic Comp-Aid Eng

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“…Phased array antenna is a most promising technology in numerous military and civil applications due to some remarkable characteristics, such as flexible beam shape ability, swift switching capability, high tracking accuracy, and high system reliability when compared to mechanically scanned counterparts [1,2].…”

Section: Introductionmentioning

confidence: 99%

Improving Scanning Performance of Patch Phased Array Antenna by Using a Modified SIW Cavity and Sequential Rotation Technique

Liu,

Guan,

et al. 2024

Electronics

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A novel patch phased array antenna with improved scanning performance is presented in this paper. The active element pattern is changed as desired through a modified SIW cavity, resulting in an extension of the phased array’s 3 dB scanning range. Furthermore, sequential rotation is used to reduce the cross-polarization level of the array, which also improves the scanning gain at ±45°. Without altering the element size or profile, the array has the merits of low cost, low complexity, and a simple feed structure. The presented phased array antenna (PAA) exhibits a gain fluctuation of less than 2.2 dB when steering to 45°. Furthermore, the cross-polarization levels are below −68.1 dB when scanning to 45° in a E-/H-plane over the whole working band. To validate the proposed design, a prototype of a 24 × 16 active PAA is designed, fabricated, and measured. A good agreement between the simulated and measured results is achieved, Thus, this paper offers a viable solution to enhance the scanning performance of a PAA with fixed interelement spacing.

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“…In order to offset the influence of inductive reactance generated by ground, coupling capacitance is introduced between TCDA elements to compensate the deficiency of antenna capacitance and expand the low-frequency bandwidth. At present, the main achievements are: one-dimensional [12][13] and two-dimensional dual polarization TCDAs [14][15]; scanning-angle extension [16]; wide angle matching layer design [17], etc. Although the dual polarization TCDAs have achieved gratifying indicators in the impedance bandwidth and scanning-angle range, the dual polarization TCDAs often adopt the dual-offset topology, as shown in Figure 1, so as to reduce the undesired coupling of the orthogonal dual polarization elements [15], the phase center of the two orthogonal dipoles is not the same.…”

Section: Introductionmentioning

confidence: 99%

A Low Profile, Broadband Circularly Polarized Beam Scanning Array

Zhao¹,

Lei²,

Yi-Jun³

et al. 2022

J. Phys.: Conf. Ser.

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Based on the idea of tightly coupled dipole array, a low profile, broadband circularly polarized array is designed in this paper. The circularly polarized phased array element consists of dual polarized dipoles with the same phase center and orthogonal arrangement, grounded coupling patches, resistive frequency selective surfaces (RFSS), and a 90° phase shifter network. In order to realize broadband scanning, the effect of RFSS on the input active voltage standing wave ratio and radiation axial ratio (AR) of the element is studied. The results show that the element can operate at 5-11.5GHz, within a ±45° angle scanning range, the AR of each scanning plane is less than 3dB, and the profile height is only 0.33 λ high.

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Conjugate Impedance Matching Method for Wideband and Wide-Angle Impedance Matching Layer With 70° Scanning in the H-Plane

Cited by 21 publications

References 11 publications

An ultrawide‐angle scanning tightly coupled dipole array with double‐layer double‐sided frequency selective surface superstrate

An ultrawide‐angle scanning tightly coupled dipole array with double‐layer double‐sided frequency selective surface superstrate

Improving Scanning Performance of Patch Phased Array Antenna by Using a Modified SIW Cavity and Sequential Rotation Technique

A Low Profile, Broadband Circularly Polarized Beam Scanning Array

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