A Dual-Mode Aperature-Coupled Stack Antenna for Wlan Dual-Band and Circular Polarization Applications

Abstract

Abstract-A compact stack antenna consisting of square loop resonators, aperture couples, feed line and the perturbation for dualband and circular polarization (CP) applications is proposed in this paper. This perturbation applies both dual-mode and orthogonal mode effects existing in the square loop resonator to present wide-band and CP characteristics simultaneously. The stack antenna presents the desired bands of 2.46 GHz with bandwidth (BW) = 160 MHz (6.58%) and 5.28 GHz with BW = 450 MHz (8.52%). The circular polarizations for dual-band are demonstrated with axial ratio (AR) spectrum and orthogonal modes. The proposed antenna is successfully simulated and measured with frequency responses, radiation patterns and current distributions.

Comparative Analysis of Stack Shaped Microstrip Patch Antenna

“…Since last two decades microsrtip antenna has been employed in various applications due to its significant merits of small size , low profile, light weight and easy integration [1]. To overcome the limitation of narrow bandwidth, many techniques have suggested e.g., microstrip patch antennas, probe fed stacked antenna, on electrically thick substrate, stacked shorted patches and slotted patch antenna have been proposed and investigated.…”

“…In general, the impedance bandwidth of a microstrip patch antenna is proportional to the antenna volume, measured in wavelengths. However, by using two multi layered patches with the walls at the edges between these two patches, one can obtain enhanced impedance band width [1]. A compact stack antenna consisting of square loop resonators, aperture couples and feed line was reported for a dual band operation also the stacked structure was utilized for multiband structure again a stacked structure had been applied to an equilateral triangular microstrip patch antennas to reduce its overall size, the stacked structure is utilized for bandwidth enhancement also [1][2][3][4][5][6].…”

Miniaturization of Antenna for Wireless Application With Difference Metamaterial Structures

“…IEEE 802.11a, IEEE 802.11bg and HyperLAN/2 standards cover WLAN frequencies. The IEEE 802.11 standard has three frequency bands at 2.4 GHz (2.484-2.4), 5.2 GHz (5.35-5.15) and 5.8 GHz (5.825-5.725), and the frequency range 3.3-3.8 GHz has been allocated to wireless personal area network (WPAN) and WiMAX [1][2][3].…”

A Wideband Planar Monopole Antenna Array With Circular Polarized and Band-Notched Characteristics

“…Spiral antennas which have essentially frequency-independent radiation and impedance characteristics over bandwidth are the exemplary wideband CP antenna, but they are bulky and required to achieve the proper phase progression between adjacent spiral arms [21]. To design a low-profile and compact size, the stacked configurations [22][23][24][25][26][27][28][29] with a patch element are employed and the bandwidths are less than 30%. The broadband single-patch CP microstrip antennas with dual capacitively coupled feeds are proposed [30][31][32].…”