Performance Evaluation and Optimization of MIMO Radars Using Biomimetic Antenna Arrays

Dorsch, Ines; Gruner, Patrik; Klose, Markus; Schmucker, David; Waldschmidt, Christian

doi:10.1109/tmtt.2021.3103579

Cited by 5 publications

(2 citation statements)

References 41 publications

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“…Indeed, only linear-algebraic equations need to be solved to determine the S-matrix of the ECN. Owing to its simplicity and linear-algebraic nature, this new formulation is especially amenable for use in numerical optimization processes aiming to improve other attributes of the ECN response (e.g., enhancing bandwidth) [15]. Similar to the method presented in [12], this new formulation also shows that an infinite number of S-matrices exists that can be used to design a two-element BMAA given a fixed set of antenna elements.…”

Section: Introductionmentioning

confidence: 98%

Synthesis of Symmetric, Two-Element Biomimetic Antenna Arrays Using Singular Value Decomposition

Vu,

Jamilan,

Van Veen

et al. 2023

IEEE Open J. Antennas Propag.

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We present a method for determining the four-port S-matrix of the external coupling network (ECN) for symmetric, two-element biomimetic antenna arrays (BMAAs) by employing singular value decomposition (SVD). The presented approach greatly facilitates the synthesis procedure of symmetric, two-element BMAAs and allows all possible scattering matrices of a four-port network realizing the ECN to be easily determined. Unlike a previously-reported method that relies on solving a set of nonlinear equations to determine the S-parameters of the ECN, the present method uses only linear-algebraic equations that can be easily solved. We show that an infinite number of S-matrices exist for the ECN of a two-element BMAA given a fixed symmetric two-element antenna array. We also demonstrate that these S-matrices are different from each other only by two arbitrary phase shift matrices that represent free design parameters. In any given BMAA synthesis problem, these free parameters can be used to optimize other attributes of the response of the BMAA. We illustrated this by showing how the overall impedance-matching bandwidth of the BMAA varies as a function of a free design parameter. Two BMAAs corresponding to two different bandwidth values were fabricated and characterized to experimentally validate the proposed synthesis method.INDEX TERMS Antenna arrays, networks, decoupling of systems, scattering matrices, singular value decomposition.

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Section: Introductionmentioning

confidence: 98%

Synthesis of Symmetric, Two-Element Biomimetic Antenna Arrays Using Singular Value Decomposition

Vu,

Jamilan,

Van Veen

et al. 2023

IEEE Open J. Antennas Propag.

View full text Add to dashboard Cite

show abstract

“…They first designed a biomimetic antenna array (BMAA) by utilizing this electrical circuit as a coupling network. Subsequently, several circuit-improved and dimension-extended BMAAs were proposed [9][10][11][12][13]. Although these researches have been proven effective for ultra high frequency and above bands, they are unsuitable for HFSWR.…”

Section: Introductionmentioning

confidence: 99%

Biologically inspired virtual aperture extension method of small aperture HFSWR multielement array

Li,

Liu,

Yang

et al. 2023

Bioinspir. Biomim.

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We propose a method for extending the virtual aperture of the small aperture high-frequency surface wave radar multielement array inspired by a fly named Ormia ochracea. Despite the tremendous incompatibility between its ear and the incoming wavelength, Ormia can accurately local the sound of its host cricket. This ability benefits from the coupled structure of Ormia’s ears which have been modelled as a mechanical vibration system. In this paper, we first design a two-degree of freedom biologically inspired coupled system by mimicking Ormia’s coupled ears. We quantitatively analyze its extension capability to the array aperture and construct the received signal model of the virtual array. We then analyze its response characteristic and available frequency band. To achieve the applications of arbitrary desired frequencies, we propose a frequency conversion algorithm. Moreover, we design two multi-degree of freedom biologically inspired coupled systems for the multielement array We summarize the criteria for extending the degree of freedom and optimize these two systems to address their respective shortcomings. Numerical results give the optimal system parameters for our desired frequency and validate the frequency conversion algorithm. By comparing the radiation pattern of the inspired arrays (arrays with the proposed systems) with that of an ordinary array, we demonstrate the virtual aperture extension capability of our proposed method. We also verify the effectiveness of proposed method by processing the actual received signals of the array.

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Combination of the biologically inspired coupled system and high‐frequency surface wave radar at signal level

Li,

Liu,

Yang

et al. 2024

IET Radar Sonar & Navi

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Virtual aperture extension of small aperture array has attracted wide attention in high‐frequency surface wave radar (HFSWR). A biologically inspired coupled (BIC) system is employed to virtually extend the array aperture. However, the existing researches on BIC only consider the array signal processing model and do not combine it with actual radar signal principle. To indeed apply the BIC system to HFSWR, two detailed methods which combine the BIC and HFSWR at signal level are proposed. A three‐dimensional signal model of HFSWR considering array processing was established and the entire signal processing was derived. Then, two combination methods, namely fast‐time domain (FTD)‐BIC and slow‐time domain (STD)‐BIC are proposed. The former implements the BIC before fast‐time processing, while the latter implements the BIC before slow‐time processing. The authors demonstrate that they can virtually extend the array aperture without affecting the target detection. Meanwhile, their capabilities in multi‐target scenarios are analysed and satisfactory conclusions are obtained. By numerical simulations and experiments, the array aperture and range‐Doppler (RD) spectrum of the standard HFSWR and BIC‐HFSWR are compared. The results show that while the performance of their RD spectrum is almost the same, BIC‐HFSWR has an enlarged virtual aperture than standard HFSWR.

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Performance Evaluation and Optimization of MIMO Radars Using Biomimetic Antenna Arrays

Cited by 5 publications

References 41 publications

Synthesis of Symmetric, Two-Element Biomimetic Antenna Arrays Using Singular Value Decomposition

Synthesis of Symmetric, Two-Element Biomimetic Antenna Arrays Using Singular Value Decomposition

Biologically inspired virtual aperture extension method of small aperture HFSWR multielement array

Combination of the biologically inspired coupled system and high‐frequency surface wave radar at signal level

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