Design and Optimization of Low RCS Patch Antennas Based on a Genetic Algorithm

Zhu, Xinyue; Shao, Wei; Li, Jialin; Dong, and Yu-Liang

doi:10.2528/pier11100703

Cited by 30 publications

(15 citation statements)

References 26 publications

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“…As we all know, ground plane slots can change the impedance characteristics of the microstrip antenna and the induced current flow path of the patch surface, which has impact on the scattering characteristics [7]. In order to balance both the radiation and scattering performance, two rectangle slots on the ground plane are cut as shown in Figure 1(b).…”

Section: Low Rcs Microstrip Antenna Design and Resultsmentioning

confidence: 99%

“…In [6], minimization technique and ground-cut slots technique are used to reduce the RCS of a microstrip antenna. With slots cut on the patch, a genetic algorithm (GA) is employed to the design of low radar cross section patch antennas in [7]. Different from the method of shaping the patch, a novel method of using PIN attenuator diodes to reduce the radar cross section is proposed in [8,9].…”

Section: Introductionmentioning

confidence: 99%

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Low RCS Microstrip Antenna Array With Incident Wave in Grazing Angle

Jiang¹,

Ren²,

Wang³

et al. 2014

PIER C

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Abstract-In this paper, a novel microstrip antenna array with reduced radar cross-section (RCS) is proposed and studied. We define that the grazing angle θ of radar incident wave ranges from 80 • to 90 • . Under the condition that the incident wave is in grazing angle, a microstrip antenna designed by the techniques of miniaturization and ground-cut slots is given firstly. Compared with a traditional rectangle microstrip antenna, the RCS peaks of the proposed antenna are efficiently controlled over the frequency range of 4∼16 GHz. Based on the design above, the proposed antenna is chosen as an element to design a 2 × 2 antenna array. Analysis and optimization of the arrangement of the array is made to achieve more RCS reduction. The measured results of radiation performance accord with the simulated ones, which indicate that the proposed method is feasible.

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Section: Low Rcs Microstrip Antenna Design and Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Low RCS Microstrip Antenna Array With Incident Wave in Grazing Angle

Jiang¹,

Ren²,

Wang³

et al. 2014

PIER C

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“…This topology is expected to be very suitable in view of the specific features needed for the patch current amplitude and phase distributions: when the E-vector of the excitation field is parallel to the slotted side of the patch, the radiation field has predominantly a linear polarization. It is worth mentioning that, to the knowledge of the authors, no slotted strip-frame patches of this kind have ever been used in printed planar or cylindrical antennas [23][24][25][26][27][28][29][30][31][32][33][34][35][36][37]. It is clearly shown in this paper that slotted strip-frame patches are effective for cylindrical microstrip antenna arrays (CMAAs) fed by a cylindrical microstrip line.…”

Section: Introductionmentioning

confidence: 97%

Cylindrical Microstrip Array Antennas With Slotted Strip-Framed Patches

Svezhentsev¹,

Kryzhanovskiy²,

Vandenbosch³

2013

PIER

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Abstract-A cylindrical microstrip array antenna with 5 pairs of coupled slotted strip framed patches is analyzed. The patches are proximity-fed by a cylindrical microstrip line. In order to extract the reflection coefficient from the standing wave pattern on the microstrip line, its length is about 5 wavelengths. To the best of the authors' knowledge proximity-fed cylindrical arrays have not been analyzed before using a rigorous MOM model that takes into account all electromagnetic couplings between patches and feeding line. The paper consists of three parts. The first part describes a plane wave excitation of the cylindrical microstrip structure. It introduces some innovating theoretical developments, like the improvement of the asymptote for the spectral Green's function and the explicit surface wave contribution. The second part calculates the radar cross section of the cylindrical microstrip structure with single and coupled slotted strip framed patches. The resonant frequencies, and the amplitude and phase of the current distribution are analysed. The third part describes a design for a proximity-fed array of 5 coupled slotted strip framed patches. It gives the reflection coefficient, current distribution on the patches, and radiation pattern. A very low level of cross polarization (< −40 dB) is achieved. It is shown that the resonant frequencies of the cylindrical array and its planar analogue lie very close to each other. This is due to the common nature of the low frequency slot resonance for the slotted strip framed patch.

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“…An inappropriate fitness function may lead to the wrong answer. Another potential problem may arise when the produced genes are relatively better than other genes [29], and the answer may lead towards a local solution. The AFPM machine power density (Equation (7)) is chosen as the fitness function and is calculated for each step and chromosome.…”

Section: Fitness Functionmentioning

confidence: 99%

Design Optimization and Analysis of Afpm Synchronous Machine Incorporating Power Density, Thermal Analysis, and Back-Emf THD

Kahourzade¹,

Gandomkar²,

Mahmoudi³

et al. 2013

PIER

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Abstract-This paper presents the design and analysis of an inside-out axial-flux permanent-magnet (AFPM) synchronous machine optimized by genetic algorithm (GA) based sizing equation, finite element analysis (FEA) and finite volume analysis (FVA). The preliminary design is a 2-pole-pair slotted TORUS AFPM machine. The designed motor comprises sinusoidal back-EMF waveforms, maximum power density and the best heat removal. The GA is used to optimize the dimensions of the machine in order to achieve the highest power density. Electromagnetic field analysis of the candidate machines from GA with various dimensions is then put through FEA in order to obtain various motor characteristics. Based on the results from GA and FEA, new candidates are introduced and then put through FVA for thermal behavior evaluation of the designed motors. Techniques like modifying the winding configuration and skewing the permanent magnets are also investigated to attain the most sinusoidal back-EMF waveform and reduced cogging torque. The performance of the designed 1 kW, 3-phase, 50 Hz, 4-pole AFPM synchronous machine is tested in simulation using FEA software. It is found that the simulation results fully agree with the designed technical specifications. It is also found from FVA results that the motor temperature reaches at highest temperature to 87 • C at the rated speed and full load under steady state condition.

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Design and Optimization of Low RCS Patch Antennas Based on a Genetic Algorithm

Cited by 30 publications

References 26 publications

Low RCS Microstrip Antenna Array With Incident Wave in Grazing Angle

Low RCS Microstrip Antenna Array With Incident Wave in Grazing Angle

Cylindrical Microstrip Array Antennas With Slotted Strip-Framed Patches

Design Optimization and Analysis of Afpm Synchronous Machine Incorporating Power Density, Thermal Analysis, and Back-Emf THD

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