Wideband circularly polarised antenna based on interelement mutual coupling effect

Zhou, Peng; Huang, Qiulin; Yang, Lin; Xi, Li; Shi, Xiaowei

doi:10.1049/iet-map.2020.0571

Cited by 6 publications

(2 citation statements)

References 25 publications

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“…Bold-C spiral array elements were used to design an 8×8 CP array antenna in [19], but the AR bandwidth was dependent on the oversampling spacing. It is worth noting that these CP-TCDA antennas only achieved wideband CP, without considering scanning [18][19][20][21]. Recently, Son et al [22] reported a CP tightly-coupled array with chamfered corners and etched cross slot patch elements.…”

Section: Introductionmentioning

confidence: 99%

A Wideband Scanning Circularly Polarized Array Antenna Based on the Shorted Transmission Line Model

et al. 2022

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Due to the huge potential of application in the communications, electronic jamming, and radar fields, circularly polarized (CP) array antennas with wide axial ratio (AR) scanning performance at wide frequency bandwidth have received great attention. A wideband scanning CP planar array antenna built by new, tightly coupled dipole array (CP-TCDA) elements, which have achieved promising results in terms of both scanning AR bandwidth and angle range in all scanning planes, is presented in this paper. Based on the shorted transmission line model, a CP-TCDA element arranged along the ±45° direction is constructed, which can shift the middle-frequency scanning blind zone out of band and thus obtain a wideband scanning AR bandwidth. Furthermore, the proposed CP-TCDA element adopts four shorting pins and four square parasitic strips, which improve wide-angle CP performance for xz-plane and diagonal-plane scans, respectively. An 8×8 left-handed CP planar array antenna based on the proposed CP-TCDA elements is designed and prototyped. The results show that the array antenna is able to operate over a 3:1 (4-12 GHz) overlapping bandwidth, and it meets the requirements of AR < 3 dB and active VSWR < 2.9 within a ±45° scanning angle range.INDEX TERMS array antenna, circularly polarized, phased antenna, scanning antennas

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Section: Introductionmentioning

confidence: 99%

A Wideband Scanning Circularly Polarized Array Antenna Based on the Shorted Transmission Line Model

et al. 2022

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“…These works fully illustrate the attractive merits of the TCDA in wideband and wide-angle scanning array designs. However, few studies deal with a CP, TCDA (CP-TCDA), and these studies often use tightly coupled environments to achieved wideband CP, without considering scanning [17][18][19][20]. Dual linearly polarized TCDAs often adopt dual-offset topology, which can minimise undesired coupling between orthogonal elements [21], but this scheme also results in the phase centres of the two orthogonal elements not coinciding.…”

Section: Introductionmentioning

confidence: 99%

A wide‐angle beam scanning circularly polarized, tightly coupled dipole array based on two‐layer parasitic ring structure elements

Zhao

Lei

Yi-Jun

et al. 2022

IET Microwaves Antenna & Prop

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In this paper, a wide-angle beam scanning circularly polarized (CP) phased array element, which consists of a concentric tightly coupled dipole array (TCDA) element with a twolayer parasitic ring structure and a wideband 90°phase shifter, is proposed. To solve the problem of the scanning blindness zone caused by a concentric layout, the grounded coupling patch for the traditional TCDA element is 'split' into a combination of a grounded parasitic ring and coupling patch. This combination structure can not only suppress the in-band common-mode resonance but also destroy the scanning blind zone mode formed by the dipole and grounded coupling patch. In addition, a two-layer parasitic ring structure is introduced to obtain a wider axial ratio (AR) beamwidth relative to a single-layer structure, so a wide-angle beam scanning AR is realized. An 8 � 8 left-handed CP planar array based on the proposed wide-angle beam scanning CP elements is designed and prototyped. Results show that the array can operate over a 3.2:1 (3.75-12.0 GHz) overlapping bandwidth, meeting an AR < 3 dB in the main beam and an active voltage standing wave ratio <2.8 within a �60°angle scanning range.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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UWB, compact, dual‐polarized antenna designed by tightly coupling technology

Chen,

Wen,

Xue

et al. 2024

Micro & Optical Tech Letters

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This study explores tightly coupling technology applied in the design of an ultra‐wideband (UWB), compact, dual‐polarized antenna. The proposed design utilizes tightly coupling effects to achieve UWB performance, with a notable feature being its double‐dipole topology. This topology significantly reduces the difficulty of impedance matching across the ultra‐wide band. To suppress the significant edge effect that occurs in tightly coupled dipoles, coupled grounded posts are added to the surrounding dipoles, effectively attenuating edge reflections and significantly expanding the bandwidth to lower frequencies. A periodic patch superstrate is loaded above the dipoles to improve the impedance matching and radiation performance. A prototype was fabricated and measured, showing a bandwidth is 1.8–12.5 GHz (149.7%) with VSWR 2.2, fully covering the S, C, and X bands. The proposed antenna is printed on a thin substrate and its size is very small, only mm (), where the is the wavelength of the lowest operating frequency.

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Wideband circularly polarised antenna based on interelement mutual coupling effect

Cited by 6 publications

References 25 publications

A Wideband Scanning Circularly Polarized Array Antenna Based on the Shorted Transmission Line Model

A Wideband Scanning Circularly Polarized Array Antenna Based on the Shorted Transmission Line Model

A wide‐angle beam scanning circularly polarized, tightly coupled dipole array based on two‐layer parasitic ring structure elements

UWB, compact, dual‐polarized antenna designed by tightly coupling technology

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