Edge Truncation Effects in a Wide-Scan Phased Array of Connected Bowtie Antenna Elements

Khanal, Prabhat; Yang, Jian; Ivashina, Marianna; Höök, Anders; Luo, Ruoshan

doi:10.23919/eucap48036.2020.9135245

Cited by 6 publications

(2 citation statements)

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“…It is not as good as that of the infinite array due to the edge truncation effects, as expected. The edge truncation effects of the connected cross bowtie antenna array were studied in [26]. The study has shown that a 7×7 element array of such elements cannot scan beyond ± 60°with the performance specified in Table 1.…”

Section: Resultsmentioning

confidence: 99%

A Wide Scanning Array of Connected Bowtie Antennas Suitable for Integration in Composite Sandwich Structures With Monte-Carlo Tolerance Analysis

Khanal¹,

Yang

Ivashina

et al. 2021

IEEE Access

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A low-profile and wide-scan phased-array antenna of connected cross-bowtie elements is proposed. The design goals and considerations are based on the applications requiring the integration of a large array antenna with composite sandwich structures, such as antennas on aircraft. In a very large array environment (modelled approximately as an infinite array), the main beam of the proposed antenna can be steered up to ±75°at azimuth and ±15°at elevation over bandwidths of 10% and 25% with active reflection coefficients below −10 dB and −5 dB, respectively. A Monte Carlo analysis of critical manufacturing and alignment tolerances shows the desired performance is achieved with the cumulative distribution probability over 80% under the uniformly distributed random combinations of the tolerances. Experimental results of a 7×7 element array prototype agree well with the simulations of this small-scale array case. The experiments show that this small-scale prototype is capable of steering the beam within the range of [−60°, 60°] at azimuth and [−15°, 15°] at elevation with the predicted performance satisfying the targeted application requirements and mechanical constraints. The achieved combination of the wide beam steering performance, relatively low antenna profile, and suitability of its feeding structure for sandwiched electro-mechanical integration makes this design unique with respect to the previously published results.INDEX TERMS Bowtie antenna, composite sandwich structure, connected array, fuselage integration, phased array.

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Section: Resultsmentioning

confidence: 99%

A Wide Scanning Array of Connected Bowtie Antennas Suitable for Integration in Composite Sandwich Structures With Monte-Carlo Tolerance Analysis

Khanal¹,

Yang

Ivashina

et al. 2021

IEEE Access

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“…There have been numerous investigations into increasing scanning range and bandwidth for planar arrays with a wide variety of techniques. Among them, the prevailing antenna solutions can be mainly classified into three categories: (i) self-packaged broadband wide-beam antennas [3]; (ii) Tapered-slot antennas [4]; (iii) connected antennas [5] or tightly coupled antennas [6].…”

Section: Introductionmentioning

confidence: 99%

Design of wide-scanning array with reactive splitter network and metasurface

Haiying,

Fulong,

Xiao

et al. 2024

J. of Syst. Eng. Electron.

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In this paper, the reactive splitter network and metasurface are proposed to radiate the wide-beam isolated element pattern and suppress mutual coupling (MC) of the low-profile phased array with the triangular lattice, respectively. Thus, broadband wide-angle impedance matching (WAIM) is implemented to promote two-dimensional (2D) wide scanning. For the isolated element, to radiate the wide-beam patterns approximating to the cosine form, two identical slots backed on one substrate integrated cavity are excited by the feeding network consisting of a reactive splitter and two striplines connected with splitter output paths. For adjacent elements staggered with each other, with the metasurface superstrate, the even-mode coupling voltages on the reactive splitter are cancelled out, yielding reduced MC. With the suppression of MC and the compensation of isolated element patterns, WAIM is realized to achieve 2D wide-angle beam steering up to ± 65° in E-plane, ± 45° in Hplane and ± 60° in D-plane from 4.9 GHz to 5.85 GHz.

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