N-Element Biomimetic Antenna Arrays

Gruner, Patrik; Dorsch, Ines; Waldschmidt, Christian

doi:10.1109/tap.2020.3044631

Cited by 7 publications

(12 citation statements)

References 35 publications

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“…Re(Y 11 ), we neglect the cross-admittance being consistent with the admittance values and circuit simulation of [10]. Fig.…”

Section: A Array Behaviorsupporting

confidence: 59%

“…1(a). The course of φ bio is significantly steeper around boresight (BS) (θ = 0 • ), indicating a much higher phase sensitivity, expressed by the angle-dependent phase gain (similar to [10])…”

Section: Bmaa Fundamentalsmentioning

confidence: 99%

“…The BMC in between the two antennas is described by a reciprocal two-port S-parameter matrix S BMC . The antenna elements were chosen identical to the antenna elements in [9] and [10]. The antenna input admittance values of Y 11 = 17.48 mS + j0.24 mS and Y 12 = 2.12 mS + j4.41 mS are extracted from full-wave simulations.…”

Section: A Array Behaviormentioning

confidence: 99%

“…The RFC is realized by two parallel open-ended stubs and a quarterwave transformer [16]. The T-junction used in this work was optimized to have little influence on the phase of the transmission coefficient of the BMC in [10]. The DCB is a thin-film silicon capacitor from Murata.…”

Section: Realizationmentioning

confidence: 99%

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A Switchable Biomimetic Antenna Array

Dorsch¹,

Schwarz²,

Waldschmidt³

2021

Antennas Wirel. Propag. Lett.

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Biomimetic antenna arrays inspired by the fly Ormia ochracea showed a promising improvement of the angle estimation capabilities of radar sensors. So far, there is usually a loss of output power associated with this improvement decreasing the detectability of weak radar targets. In this paper, an electronically switchable two-element biomimetic antenna array is presented for the first time. This array provides the possibility to switch between a biomimetic antenna mode with enhanced phase sensitivity and a conventional antenna mode with better SNR. Circuit requirements are discussed, the design process is described, and a realization in the 77-GHz range using PIN diodes as switching elements is presented. Radar measurements verify the concept. By switching, the phase sensitivity of the realized array can be enhanced by a factor of 3 with a relative power loss of maximum 14 dB.Index Terms-Biologically-inspired antennas, Biomimetic antenna arrays (BMAAs), Direction-of-arrival (DoA) estimation, Millimeter wave antenna arrays, Switched circuits.

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“…Re(Y 11 ), we neglect the cross-admittance being consistent with the admittance values and circuit simulation of [10]. Fig.…”

Section: A Array Behaviorsupporting

confidence: 59%

Section: Bmaa Fundamentalsmentioning

confidence: 99%

Section: A Array Behaviormentioning

confidence: 99%

Section: Realizationmentioning

confidence: 99%

See 2 more Smart Citations

A Switchable Biomimetic Antenna Array

Dorsch¹,

Schwarz²,

Waldschmidt³

2021

Antennas Wirel. Propag. Lett.

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show abstract

“…Such antenna arrays mimicking the hearing mechanism of the fly Ormia ochracea showed superior angle estimation behavior in various concepts [9], [10]. Advantages, among others, are a better angle estimation accuracy for arrays with fixed antenna spacing [11], [12], less required space for a predefined angular performance [13], or different possibilities to shape the BP of arrays [14], [15]. In contrast to the improvement of the angle estimation behavior through advanced signal processing, the processing time is not extended by BMAAs compared to conventional antennas using the same beamformer (usually a maximum likelihood estimator).…”

mentioning

confidence: 99%

Performance Evaluation and Optimization of MIMO Radars Using Biomimetic Antenna Arrays

Dorsch¹,

Gruner²,

Klose³

et al. 2021

IEEE Trans. Microwave Theory Techn.

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The improvement of the angular resolution of radar sensors is one of the crucial goals of current radar research. A promising approach to achieve this goal is inspired by the ears of a fly called Ormia ochracea. The working principle was adapted for antennas, and the so-called biomimetic antenna arrays (BMAAs) aroused the interest of several research groups. In this work, BMAAs are incorporated into multiple-input multiple-output (MIMO) arrays, a very common approach of improving the angular resolution, to gain more degrees of freedom in array design. The MIMO BMAAs are modeled utilizing the effective biomimetic antenna distance, a fundamentally new measure introduced in this article to translate the special biomimetic phase progression into a spatial quantity. We present straightforward antenna configurations but also describe how a genetic algorithm can be utilized to optimize both antenna positions and BMAA parameters. The proposed arrays show various beneficial effects such as a wider angular range for unambiguous angle estimation or a narrower beamwidth. The impact of MIMO BMAAs on the angular resolution is thoroughly analyzed both theoretically and by radar measurements in the range of 77 GHz. The measurements confirm the modeling method very well and show a significant increase in the angular separability.

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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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N-Element Biomimetic Antenna Arrays

Cited by 7 publications

References 35 publications

A Switchable Biomimetic Antenna Array

A Switchable Biomimetic Antenna Array

Performance Evaluation and Optimization of MIMO Radars Using Biomimetic Antenna Arrays

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

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