Capabilities and fundamental limitations of multi-mode antennas in an array environment

Ivashina, Marianna; Redkina, E.A.; Maaskant, Rob; Prinsloo, D.S.

doi:10.1109/eucap.2016.7481893

Cited by 5 publications

(3 citation statements)

References 6 publications

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“…22. Connected TSA array [1] and multi-mode TSA array [9] have good performance but are not suitable for the desired application due to element height exceeding the required 0.4λ. Most of the reported TSA arrays in literature have element height of at least 1λ for good performance, including [1], [9].…”

Section: Resultsmentioning

confidence: 99%

“…Connected TSA array [1] and multi-mode TSA array [9] have good performance but are not suitable for the desired application due to element height exceeding the required 0.4λ. Most of the reported TSA arrays in literature have element height of at least 1λ for good performance, including [1], [9]. Connected dipole array in [13] has desired element height and relatively simple design but it can only steer the beam to ±45°and its geometry is not compatible with the sandwich structure integration.…”

Section: Resultsmentioning

confidence: 99%

“…We should note that the wide scanning range and good mechanical integration are more important than the wide bandwidth for the targeted application. Apart from the multi-mode TSA [9], all other antenna arrays in Table 4 have a smaller scanning range than the required for the targeted application. In Table 4, the bandwidth is given for active reflection coefficient Γ act < −10 dB when beam steered from broadside to their maximum steering angle.…”

Section: Resultsmentioning

confidence: 99%

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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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