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Proceedings ArticleDOI

Design of Optimal Broadband Microstrip Antenna Elements in the Array Environment using Genetic Algorithms

09 Jul 2006-pp 3727-3730
TL;DR: In this paper, a genetic algorithm (GA) design methodology is presented for the synthesis of broadband or multiband microstrip stacked-patch antenna arrays, where the geometric and electric properties of a single element in an infinite array environment are optimized so that the mutual coupling between the array elements can be properly accounted for.
Abstract: In this paper, a Genetic Algorithm (GA) design methodology is presented for the synthesis of broadband or multiband microstrip stacked-patch antenna arrays. The geometric and electric properties of a single element in an infinite array environment are optimized so that the mutual coupling between the array elements can be properly accounted for. A full-wave Periodic Finite Element-Boundary Integral (PFE-BI) method is combined with a robust parallel GA for the purpose of optimizing microstrip antenna elements with complex geometries and inhomogeneous dielectric materials in the array environment. An example is presented for a stacked-patch antenna element optimized in the array environment that achieves a 35% bandwidth.
Citations
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Book ChapterDOI
04 Apr 2011
TL;DR: In this article, the design of a microstrip antenna is not always an easy problem and the antenna designer is faced with difficulties coming from a) the inherent disadvantages of a printed resonant antenna element, for example the narrow impedance bandwidth, and b) the various requirements of the specific applications, which concern the operation of the radiating element, and can not be satisfied by a printed scheme with an ordinary configuration.
Abstract: The evolution of modern wireless communications systems has increased dramatically the demand for antennas, capable to be embedded in portable, or not, devices which serve a wireless land mobile or terrestrial-satellite network. With time and requirements, these devices become smaller in size and hence the antennas required for transmit and receive signals have also to be smaller and lightweight. As a matter of fact, microstrip antennas can meet these requirements. As they are lightweight and have low profile it is feasible them to be structured conformally to the mounting hosts. Moreover, they are easy fabricated, have low cost and are easy integrated into arrays or into microwave printed circuits. So, they are attractive choices for the above mentioned type of applications. For all that, the design of a microstrip antenna is not always an easy problem and the antenna designer is faced with difficulties coming from a) the inherent disadvantages of a printed resonant antenna element, for example the narrow impedance bandwidth, and b) the various requirements of the specific applications, which concern the operation of the radiating element, and can not be satisfied by a printed scheme with an ordinary configuration. For example, it would be demanded, the microstrip element to have gain characteristics that potentially incommensurate to its size or/and frequency bandwidth greater than the element could give, taking into account that it operates as a resonant cavity. Moreover, the rapid development in the field of Land Mobile Telephony as well as in the field of Wireless Local Area Networks(WLANs) demands devices capable to operate in more than one frequency bands. So the design of a printed antenna with intend to conform to multiple communications protocols, for example the IEEE 802.11b/g, in the band of 2.4GHz, and the IEEE 802.11a at 5.3GHz and 5.8GHz, would be a difficult task but at the same time a challenge for the designer. Counting in the above the possibility the device, and so the antenna, to serve terrestrial and also satellite navigation systems the problem of the antenna design is even more complicated. In this chapter techniques will be analysed, to design microstrip antennas that combine the attributes mentioned above which make them suitable for modern communications applications. Specific examples will be also presented for every case.

32 citations


Cites background from "Design of Optimal Broadband Microst..."

  • ...GAs are also a frequent choice for the design and optimization of microstrip antennas, especially broadband, slit textured, fractal printed, or not, as well as optimized EBG antennas with enhanced gain [95]-[98]....

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Proceedings ArticleDOI
01 Jun 2009
TL;DR: In this paper, the geometric and electrical properties of a single antenna element in an infinite array environment are optimized so that the mutual coupling between the array elements can be properly accounted for.
Abstract: It is critically important that mutual coupling effects be properly taken into account when designing wideband antenna elements for use in phased arrays; especially those which require large scanning volumes. In this paper, a method of designing antenna elements for use in large planar phased arrays is presented. The geometric and electrical properties of a single antenna element in an infinite array environment are optimized so that the mutual coupling between the array elements can be properly accounted for. A robust genetic algorithm [1,2] is used to optimize the antenna elements for operation in an infinite array environment with the goal of providing low return loss, high gain, and linear polarization over wide operating bandwidths and large scan angles. An example is presented and its performance is verified by comparison with the results of commercial software package. Similar design approaches have been taken before in [3], although the antenna designs presented possess large thicknesses (up to 0.3λ 0 between radiator and ground) which can limit practical application. Moreover, the analysis approach proposed in [3] is based on a periodic version of the Finite Difference Time Domain (FDTD) technique, whereas the analysis approached developed in this work is based on the Periodic Finite Element Boundary Integral (PFEBI) method.

5 citations


Cites methods from "Design of Optimal Broadband Microst..."

  • ...A robust genetic algorithm [1,2] is used to optimize the antenna elements for operation in an infinite array environment with the goal of providing low return loss, high gain, and linear polarization over wide operating bandwidths and large scan angles....

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References
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Book
05 Jan 1998
TL;DR: Introduction to Optimization The Binary genetic Algorithm The Continuous Parameter Genetic Algorithm Applications An Added Level of Sophistication Advanced Applications Evolutionary Trends Appendix Glossary Index.
Abstract: Introduction to Optimization The Binary Genetic Algorithm The Continuous Parameter Genetic Algorithm Applications An Added Level of Sophistication Advanced Applications Evolutionary Trends Appendix Glossary Index.

4,006 citations


"Design of Optimal Broadband Microst..." refers methods in this paper

  • ...A Micro-Genetic Algorithm (MGA) with a binary encoding scheme [4] is employed in this paper....

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Journal ArticleDOI
TL;DR: In this paper, a design strategy to achieve bandwidths in excess of 25% for probe-fed stacked patches is presented and the role of each antenna parameter in controlling the impedance behavior is provided.
Abstract: In this paper, a design strategy to achieve bandwidths in excess of 25% for probe-fed stacked patches is presented. The choice of appropriate dielectric materials for such bandwidths is given and the role of each antenna parameter in controlling the impedance behavior is provided. It has been found that the selection of the substrate below the lower patch plays a major role in producing broad-band responses. A simple design procedure is outlined and this technique is verified experimentally. The findings presented here can be applied to all types of probe-fed stacked patches as well as edge-fed and cavity-backed configurations.

197 citations


"Design of Optimal Broadband Microst..." refers background in this paper

  • ...Much research has been carried out on the design strategy for stacked-patch antennas, and good results have been achieved (see for example [1])....

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  • ...2 where (a) is the reflection coefficient (S11) of the stacked-patch antenna alone [1], and (b) is the reflection coefficient of the same antenna when placed in an infinite planar array....

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Proceedings ArticleDOI
03 Jul 2005
TL;DR: In this paper, a GA is used to optimize the dielectric constants of the material as well as the topology of the unit cell to produce the desired frequency response, and the finite element-boundary integral method (FE-BI) is employed to evaluate efficiently the fitness of a candidate design.
Abstract: A genetic algorithm (GA) design methodology is presented for the synthesis of doubly periodic all-dielectric frequency selective surfaces (DFSS). The GA is used to optimize the dielectric constants of the material as well as the topology of the unit cell to produce the desired frequency response. The finite element-boundary integral method (FE-BI) is employed to evaluate efficiently the fitness of a candidate design.

12 citations


"Design of Optimal Broadband Microst..." refers background in this paper

  • ...Design examples and an outline of the implementation of PFE-BI can be found in [3]....

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