A novel miniature multi-frequency broadband patch antenna for WLAN applications

Abstract

Miniature antennas with multi frequency and broadband features have a high demand in the field of wireless communications. This paper proposes such a patch antenna for WLAN applications in UNII-1, UNII-2, UNII-2 extended and UNII-3 bands. The specialty of the antenna is its compact size with a foot print of only 8 mm × 4 mm. The patch with a shorting pin is etched on a substrate with a dielectric constant of 3.2 and a thickness of 0.762 mm and is suspended in air 5 mm above a ground plane. The patch geometry, feed point and shorting pin positions are optimized using genetic algorithms. The designed antenna displays a -10 dB fractional impedance bandwidth of 12.6 % and is suitable for handheld devices. Index Terms-Broadband patch antenna, Fractional bandwidth, Genetic algorithm optimization, WLAN

Bio-Inspired Algorithms Applied on Microstrip Patch Antennas: a Review

“…Few years later, GA based geometric modeling of MPAs was presented [7]. Since then, GA has been significantly used to introduce broadband [10]- [23], multiband [19]- [37] and miniature [36]- [41] MPAs for various applications. Further, MPAs with highdirectivity [42], [43] broadside radiation [44] and increased gain [45] have been designed by using GA.…”

On the behavior of several fitness functions for genetically optimized microstrip antennas

“…When such multiple resonant bands are close enough to overlap, MPAs show broadband [10][11][12][13][14][15][16][17] performance. Longer meandering current paths on the patch lead to miniature [18][19][20] performance. Furthermore, inphase currents result in high-directivity [21][22] MPAs.…”

Miniaturized Uwb Monopole-Like Slot Antenna With Low Un-Roundness of H-Plane Radiation Patterns at High-Frequency Band

“…By the cooperative use of a fork-like radiator and a ground plane with an L-shaped stub, the CPW-fed monopole-like slot antenna achieves a wide working band between 2.7 to 12.4 GHz in [7]. Various techniques used for the design of miniature antennas are proposed in [10][11][12][13][14][15]. Some of these techniques use genetic algorithms optimization [10][11][12], slots [13,14], coupling and shorting [15], etc.…”

“…Various techniques used for the design of miniature antennas are proposed in [10][11][12][13][14][15]. Some of these techniques use genetic algorithms optimization [10][11][12], slots [13,14], coupling and shorting [15], etc. The proposed antenna with trapezoidal slots has more compact physical size than the antennas presented in [5,[7][8][9] seen from Table 1.…”