Optimal Design of Dualband CPW-Fed G-Shaped Monopole Antenna for Wlan Application

Abstract

Abstract-A dualband coplanar waveguide (CPW)-fed planar monopole antenna suitable for WLAN application is presented in this paper. The antenna resembling as a "G" shape and optimally designed by using the particle swarm optimization (PSO) algorithm can produce dual resonant modes and a much wider impedance bandwidth for the higher band. Prototypes of the obtained optimized antenna have been constructed and tested. The measured results explore good dualband operation with −10 dB impedance bandwidths of 9.7% and 62.8% at bands of 2.43 and 4.3 GHz, respectively, which cover the 2.4/5.2/5.8 GHz WLAN operating bands, and show good agreement with the numerical prediction. Also, good antenna performances such as radiation patterns and antenna gains over the operating bands have been observed.

Miniaturized Modified Dipoles Antenna for Wlan Applications

“…However, most proposed antennas are monopoles [13][14][15][16][17][18] which usually require large grounds, so the size of the antenna is big, which increases the limits of the practical applications.…”

“…Therefore, multiband antennas for WLAN applications become a hot research point in the past decades and many technologies for miniaturized antenna with multiband functionality have been proposed [10][11][12][13][14][15][16][17][18]. However, most proposed antennas are monopoles [13][14][15][16][17][18] which usually require large grounds, so the size of the antenna is big, which increases the limits of the practical applications.…”

Dual-Wideband Monopole Loaded With Split Ring for Wlan Application

“…The lower band ranges from 2.4 to 2.484 GHz for IEEE 802.11b/g and upper band covers frequency band from 5.15-5.35/5.725-5.825 GHz for IEEE 802.11a. Nowadays, dual-band WLAN systems combining IEEE 802.11a/b/g standards are becoming more attractive [1,2]. A dual-band antenna is a key component for such communication systems [3][4][5][6][7][8][9], especially for "universal" applications, where it should be covering the whole 2.4-2.484 GHz and 5.15-5.825 GHz bands for dual-band WLAN.…”

A New Method to Avoid Crowding Phenomenon in Extracting the Permittivity of Ferroelectric Thin Films

“…A number of techniques, which have potential to be applied for the permittivity measurement of ferroelectric materials, have been developed [2,3]. Among these methods, the CPW structure is widely applied [4][5][6][7][8][9][10][11][12]. By measuring the S-parameter of the CPW, the characteristic impedance and propagation constant can be obtained, by which the effective permittivity determined.…”