Application of Multiobjective Topology Optimization to Miniature Ultrawideband Antennas With Enhanced Pulse Preservation

Chen, Yen‐Sheng; Chiu, Yihsiang

doi:10.1109/lawp.2015.2476560

Cited by 12 publications

(16 citation statements)

References 14 publications

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“…To achieve the design goal, this work did not perform conventional size optimization approaches, which need a given antenna structure and fine‐tuned associated geometric parameters; instead, the framework of topology optimization was adopted. In mobile antenna design, topology optimization shows the potential to generate an innovative antenna shape, and it exploits a given design area in an efficient way.…”

Section: Limitation Of Conventional Optimization Methodsmentioning

confidence: 99%

Performance enhancement of multiband antennas through a two-stage optimization technique

Chen

2016

Int. J. RF Microw. Comput. Aided Eng.

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This paper presents an optimization technique that aims at multiband antenna design. The proposed method is based on the framework of multi‐objective evolutionary algorithms, and a two‐stage mechanism that balances the degree of optimizing impedance matching and the degree of providing a wide impedance bandwidth is incorporated. Conventionally, the design optimization of multiband antennas relies on minimizing the maximum reflection coefficient or maximizing the area under the return‐loss curve over targeted frequency bands. However, these widely used methods direct an optimization algorithm to improper solution sub‐domains in the multiband design problem. To overcome the limitation of these conventional methods, the general rule of objective functions is thoroughly investigated in this paper. Furthermore, a two‐stage optimizer is designed based on what the multiband optimization problem needs. With the use of the proposed method, two multiband antennas for mobile communication systems covering 824–960 MHz and 1710–2170 MHz are successfully developed. Simulated and measured results show that the proposed technique outperforms conventional optimization approaches significantly.

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Section: Limitation Of Conventional Optimization Methodsmentioning

confidence: 99%

Performance enhancement of multiband antennas through a two-stage optimization technique

Chen

2016

Int. J. RF Microw. Comput. Aided Eng.

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“…The material distributive approach of topology optimisation combined with evolutionary algorithms for the design of UWB antennas has been discussed in many literatures [16][17][18][19][20][21]. In [16][17][18][19], the UWB antennas are optimised by dividing the metallic patch into uniform size cells which were implemented using the finite difference time-domain method in combination with mixed model of 2D genetic algorithm (GA) [16,17] and double population GA [18]; the discrete Green's function method combined with binary particle swarm optimisation (BPSO) algorithm [19].…”

Section: Introductionmentioning

confidence: 99%

“…In [16][17][18][19], the UWB antennas are optimised by dividing the metallic patch into uniform size cells which were implemented using the finite difference time-domain method in combination with mixed model of 2D genetic algorithm (GA) [16,17] and double population GA [18]; the discrete Green's function method combined with binary particle swarm optimisation (BPSO) algorithm [19]. The non-uniform segmentation of radiating patch in UWB antenna optimisation was reported in [20,21]. Co-simulation of Computer Simulation Technology Microwave Studio (CST MWS) software and MATLAB with GA [20] and Ansoft High Frequency System Simulator and MATLAB co-simulation with the strength Pareto evolutionary algorithm 2 optimisation algorithm [21] were the implementation methodologies.…”

Section: Introductionmentioning

confidence: 99%

Joint optimisation of ground, feed shapes with material distributive topology of patch in UWB antennas using improved binary particle swarm optimisation

Palanisamy

Meenakshi

2018

IET Microwaves, Antennas & Propagation

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A joint optimisation of the ground plane and feed structure shapes, and the topology of radiating patch in ultra wideband (UWB) antennas are proposed. The material distributive topology of the radiating patch is configured with symmetric and asymmetric topologies. The ground plane and feed structure of antenna are optimised from a set of discrete feasible combinations. The ground plane, feed structure and radiating patch topology are identified based on the particle's position vector of the improved binary particle swarm optimisation algorithm. Based on this vector, the antenna is simulated and tested by using the MATLAB–Computer Simulation Technology (CST) co‐simulation method. The fitness value of the each particle is calculated from the return loss value evaluated by the CST and the particle's velocity and position vectors are accordingly updated. Compared to asymmetric topology, the symmetric topology antenna converges faster because of reduced search space dimension. The symmetric topology UWB antenna is further miniaturised to occupy an area of 720thinmathspacemnormalm2 from 1080thinmathspacemnormalm2 based on the observation of surface current distribution. The measurement results of the fabricated prototypes confirm that all the three antennas yield good impedance matching over the UWB band with better pulse preserving capability.

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“…In other words, the bandwidth used by these systems is 7.5 GHz which is the largest bandwidth allocated for any commercial use thus far. With such a bandwidth, the potential targets for UWB systems have high data rates and accurate positioning capabilities [1][2][3]. In [1], four planar UWB antennas with cuts at the edges and parasitic loops are employed.…”

Section: Introductionmentioning

confidence: 99%

“…Also two parameterized slits provide additional degrees of freedom that help to ensure good impedance matching. In [3], a multiobjective topology is used for the optimization of the UWB antenna.…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of a Band-Notched Staircase Ultra-Wideband Antenna

Al-Zayed¹,

Al-Bagli²,

Shameena³

2017

PIER C

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Abstract-A compact ultra-wideband planar monopole antenna with a notched band at WLAN frequencies is presented. The antenna is fed using a finite ground coplanar waveguide and has a structure consisting of stair-shaped radiator and ground plane. The notched band is implemented by cutting two symmetrical narrow slits from the ground plane. The antenna is fabricated on a substrate with a dielectric constant of 4.4 and has a compact size of 18 × 26 × 1.6 mm 3 . Experimental and simulation results of the fabricated antenna are found to be in good agreement. The antenna achieves an average gain of 3 dBi and efficiency of more than 80% over the operational band. Time domain analysis, which includes the group delay response and fidelity calculation, implies that minimal distortion is introduced by the proposed antenna which makes it suitable for portable pulsed UWB systems.

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Application of Multiobjective Topology Optimization to Miniature Ultrawideband Antennas With Enhanced Pulse Preservation

Cited by 12 publications

References 14 publications

Performance enhancement of multiband antennas through a two-stage optimization technique

Performance enhancement of multiband antennas through a two-stage optimization technique

Joint optimisation of ground, feed shapes with material distributive topology of patch in UWB antennas using improved binary particle swarm optimisation

Design and Analysis of a Band-Notched Staircase Ultra-Wideband Antenna

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