Minimization of a Rectangular Patch using Genetic Algorithms

Abstract

I n recent years, the miniaturization of antennas became more and more important, especially in connection with subscriber transceivers for cellular systems. Due to the multiple scattering environments and the almost indefinable operating scenario, the crosspolarization characteristics of the antenna are less important, however its physical size is critical. The attempts to reduce the physical size of the antenna made in the past, used classical methods, such as embedding the antenna in a dielectric medium of a high permittivity, adding a resistive element in series with the antenna, etc. , but little effort was invested in simply generating other geometries, which by their intrinsic properties, radiate at a lower frequency than the classical well-known antennas which occupy the same physical volume. This work proposes a new method for the design of microstrip patch antennas with a low resonance frequency, or conversely, an antenna, which makes ' a m ore effici ent use' of its physical volume.

Optimization of modified T‐shape microstrip patch antenna using differential algorithm for X and ku band applications

“…[19], dual-band circularly polarized spidron fractal microstrip patch antenna for X and Ku band applications had been designed with frequency band ranging from 11.44 to 12.48 GHz and 13.47 to 14.39 GHz, the overall size was 50 3 50 3 1.52 mm 3 , this was again considered to be very large and resulted in a complex design. Therefore, visualizing the overall antenna size issues, the main aim of this paper is to design an inset-fed dual-band microstrip antenna using DE with small and compact size which covers the specified frequency range for application in X band (8)(9)(10)(11)(12) and Ku band (12)(13)(14)(15)(16)(17)(18) in Ref. [20].…”

“…7,8 In present work, the focus is on designing an inset-fed slotted microstrip patch antenna with a compact size, using Differential Algorithm (DE), which optimizes the antenna design parameters like length, width, and feed line position to obtain the desired results for ultimate performance. [9][10][11] DE is a global optimization problem which is consistently ranked as one of the best search algorithms for several case studies. 12 It was developed by Price and Storn in 1996 for handling the nondifferentiable, nonlinear, and multimode objective functions.…”

Small Antennas: Miniaturization Techniques and Applications

“…To re-duce the antenna dimensions mostly shorted patches and PIFAs are used [7 -11]. To further reduce the antenna dimensions modifications have to be introduced in the patch [5,12]. The research results and antenna designs presented in this paper range from case studies used for gaining experience in application of miniaturization techniques up to antennas and arrays designed for specific applications in prescribed frequency bands.…”

PIFA with optimized ground shape and capacitive feeding for broadband applications

“…In Ref. 2, a printed antenna occupying the same physical volume as a rectangular patch was designed using GA to resonate at a frequency around 37% lower than the resonance frequency of the patch. Chung and coworkers [3] showed a new method for generating amorphous antenna shapes using ellipses and the GA for broadband and multiband antenna design.…”