Reducing the Radar Cross Section of Microstrip Arrays Using AMC Structures for the Vehicle Integration of Automotive Radars

Vasanelli, Claudia; Bogelsack, F.; Waldschmidt, Christian

doi:10.1109/tap.2018.2794410

Cited by 58 publications

(27 citation statements)

References 16 publications

(27 reference statements)

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“…The AMC should be designed so that destructive interference can be achieved in the wave reflected back by the AMC and the antenna. Following this approach, the antenna arrays developed in [4] and [5] showed a significant RCS reduction compared to the same array without the AMC.…”

Section: Design Of the Antenna Systemmentioning

confidence: 99%

“…The placement of the AMC on the PCB should not affect the radiation patterns of the antennas [4]. For this reason, the two-way pattern for all the 12 virtual transmitter-receiver pairs has been measured.…”

Section: A Two-way Radiation Patternmentioning

confidence: 99%

“…Let us consider the same scenario presented in [4]. An automotive radar illuminates a target on the street.…”

Section: Introductionmentioning

confidence: 99%

“…Some previous works [4], [5] proposed the use of low-RCS antennas as a possible solution to mitigate the multiple reflections between radar sensor and painted bumper. If the radar is equipped with such an antenna system, it can scatter back less power in boresight direction towards the bumper, while redirecting the impinging wave towards different directions other than the boresight.…”

Section: Introductionmentioning

confidence: 99%

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Characterization of a mm-Wave Automotive Radar with a Low-RCS MIMO Antenna System

Vasanelli¹,

Baur²,

Nezadal³

et al. 2018

2018 IEEE Conference on Antenna Measurements &Amp; Applications (CAMA)

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Millimeter-wave (mm-wave) automotive radars are typically installed behind the car fascia. However, the placement behind the bumper can cause multiple reflections, which may lead to a wrong estimation of the direction of arrival (DoA) of the target. The use of low-RCS (radar cross-section) antennas can mitigate them. This work presents the characterization of a mmwave frequency-modulated continuous-wave (FMCW) MIMO (multiple-input multiple-output) radar equipped with a low-RCS antenna systems. The measurement results demonstrate that such an antenna configuration can reduce the angular error in the DoA estimation and increase the robustness of the system.

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Section: Design Of the Antenna Systemmentioning

confidence: 99%

Section: A Two-way Radiation Patternmentioning

confidence: 99%

“…Let us consider the same scenario presented in [4]. An automotive radar illuminates a target on the street.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Characterization of a mm-Wave Automotive Radar with a Low-RCS MIMO Antenna System

Vasanelli¹,

Baur²,

Nezadal³

et al. 2018

2018 IEEE Conference on Antenna Measurements &Amp; Applications (CAMA)

Self Cite

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show abstract

“…In [19,20], an antenna array consisting of patches that were combined in series and/or in parallel arrangements to provide high directivity was introduced. Several papers have been introduced to address the problems of mutual coupling between elements and the radar cross section of the antenna array, as well as to provide high isolation between elements [21][22][23][24]. Vasanelli et al [23] introduced a low radar cross-section antenna array based on the use of an artificial magnetic conductor (AMC) that was set around the series antenna to reduce the reflection in the direction of car fascia.…”

mentioning

confidence: 99%

MOM/GA-Based Virtual Array for Radar Systems

Sultan

Abdullah

Abdallah

et al. 2020

Sensors

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This paper introduces a novel antenna array synthesis for radar systems based on the concept of a virtual antenna array (VAA) and the method of moments/genetic algorithm (MoM/GA) synthesis method. The VAA concept is applied to both scanning and fixed radiation pattern arrays. The proposed VAA is introduced to simultaneously support the medium-range radar (MRR) and the long-range radar (LRR) with beam width ±7° for LRR and ±37° for MRR. The proposed VAA is distinguished by its minimum number of antenna elements, simple feeding network, high efficiency, and gain, but all of these are at the expense of a large aperture antenna size compared to the planar antenna array (PAA). The VAA has the ability to have the feeding network and the radiating elements on the same layer, as compared to the multilayer PAA. The newly proposed concept is analyzed and verified analytically and experimentally. Two orthogonal (16 elements) VAAs are designed to operate in the frequency range from 23.55 to 24.7 GHz and to support a flat-shoulder shape (FSS) radiation pattern for LRR/MRR. The antenna was fabricated and tested experimentally, and good agreements between the simulated and measured results were noticed. The proposed VAA is introduced to solve the problems of large size, low isolations, low efficiency, feeding network, low resolution, and small coverage range for the antenna arrays of automotive radars. The proposed antenna array is introduced for automotive radar applications at 24 GHz.

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Performance enhancement of microstrip antenna using artificial magnetic conductor reflection phase characteristics

Arand

2021

Int J RF Mic Comp-Aid Eng

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This paper investigates the behavior of a dipole antenna near the perfect electric conductor, perfect magnetic conductor, and artificial magnetic conductor (AMC). The phase variations due to reflector reflection coefficient and the distance between antenna and reflector are analyzed, and their effect on the antenna radiation patterns are studied for different frequencies. The cause of a null occurrence in the broadside direction of radiation pattern when using the AMC (or HIS) as a reflector is explored. It is shown that this degradation is due to the phase of the reflected waves at different angles from the reflector surface and this phenomenon may occur for any type of reflector. In the next step, a new broadband unit cell is presented. By changing the AMC reflection feature and the distance between the antenna and the ground plane for three different states, the performance of the printed dipole antenna is improved.The maximum gain of the antenna is enhanced by approximately 7 dB, 9 dB, and 9 dB for three different cases of AMC reflectors. Moreover, the 3 dB maxgain bandwidth of the structures are 33.81%, 29.17% and 20.84%, with profile size of 0.16λ, 0.4λ, and 0.4λ, respectively. All cases of the antenna with AMC structures have been fabricated and the measurement results are presented.

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Reducing the Radar Cross Section of Microstrip Arrays Using AMC Structures for the Vehicle Integration of Automotive Radars

Cited by 58 publications

References 16 publications

Characterization of a mm-Wave Automotive Radar with a Low-RCS MIMO Antenna System

Characterization of a mm-Wave Automotive Radar with a Low-RCS MIMO Antenna System

MOM/GA-Based Virtual Array for Radar Systems

Performance enhancement of microstrip antenna using artificial magnetic conductor reflection phase characteristics

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