A Wideband Planar Aperture Array Using Interconnected Crossed Rings

Zhang, Yongwei; Brown, Anthony K.

doi:10.1109/tap.2018.2882612

Cited by 7 publications

(4 citation statements)

References 14 publications

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“…A capacitive coupling is introduced between the elements to counter the inductive effect of the ground plane at lower frequencies. A crossed ring structure in conjunction with a metamaterial layer is later found to achieve a broader bandwidth, while maintaining the low-profile structure [14], [15].…”

Section: Introductionmentioning

confidence: 99%

A Dual Slant-Polarized Cylindrical Array of Tightly Coupled Dipole Antennas

Zhang

Shi

et al. 2022

IEEE Access

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This study proposes a design of a low-profile ultra wide-band cylindrical antenna array with plus/minus 45-degree dual polarization. The proposed compact cylindrical antenna array produces an omnidirectional radiation pattern in the azimuth plane to cover all directions. It consists of 20 × 4 dualpolarized elements within a diameter of 131 mm and a height of 116 mm. The array elements are tightly coupled slant-polarized wideband dipole antennas, and hence, rotational symmetry of radiation patterns in the horizontal plane is achieved for the two orthogonal polarizations. Furthermore, a metasurface structure has been designed and placed over the interconnected array elements to achieve ultrawideband capabilities. The proposed array provides less than −10 dB reflection coefficient over a frequency band between 1.7 GHz and 5.9 GHz. The cross-polarization discrimination (XPD) is 15 dB at boresight in the azimuth plane. The electromagnetic characteristics of the cylindrical array and its corresponding planar array before bending have been evaluated and compared via simulations, and verified by measurements. The compact size, lightweight, and printable design of the proposed antenna array enable low-cost manufacturing and ease of installation. The proposed array design overcomes many challenges encountered in wide-band MIMO systems by covering the entire sub-6 GHz band while providing wide 360-degree coverage in the azimuth plane, hence, supporting multibeam applications.INDEX TERMS Cylindrical arrays, frequency selective surfaces, phased arrays, planar arrays, ultrawideband antennas.

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Section: Introductionmentioning

confidence: 99%

A Dual Slant-Polarized Cylindrical Array of Tightly Coupled Dipole Antennas

Zhang

Shi

et al. 2022

IEEE Access

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“…In this paper, the CPW based on flexible substrate is developed to feed the planar antenna with a differential structure [2] [3]. The CPW serves as antenna feedline and impedance matching network at the same time.…”

Section: Introductionmentioning

confidence: 99%

Dual function flexible coplanar waveguide for feeding antenna of balanced structure

Zhang

Shi

et al. 2021

2021 13th International Symposium on Antennas, Propagation and EM Theory (ISAPE)

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A flexible coplanar waveguide (CPW) design is presented suitable for feeding planar antenna with a balanced structure. Two features are provided by the flexible design, transition from balance on the antenna side to unbalance on the receiver side; transformation of characteristic input impedance of the antenna to the value of a standard load. It is essential for the CPW to be bended to fit the purposes hence the effect of bending of CPW on the transmission performance and method to feed planar antenna are investigated. The common mode propagation due to the inserted feedline is observed and the solution to eliminate the auxiliary common-mode effect in the structure is also discussed.

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“…Based on the successful experience in the interconnected crossed rings array with a square grid [2, 17, 18], in order to use the least number of elements for maximum performance, this paper reports the triangular‐grid based C‐ORA array design and its performance compared to a C‐ORA array with a similar element structure but arranged in a regular square grid. The unique characteristics of the C‐ORA design, and its advantages including higher polarisation purity compared to the initial ORA design in a square grid, has been presented in [18]. In this paper, with a renewed design based on triangular grid configuration, the characteristics of the C‐ORA array including broad bandwidth, dual polarisation and wide scan angle are demonstrated.…”

Section: Introductionmentioning

confidence: 99%