Wide-Band/Dual-Band Packaged Antenna for 5–6 GHz WLAN Application

Abstract

suitable to describe the singular behavior of the spatial GF. In its turn in the improved version the analytical part derived in the explicit form provides with this behavior. It can be easily derived from Fig. 2 that the numerical part (dash-point line) of the improved GF gives a considerably smaller contribution in the vicinity of the origin than the analytical one. This numerical part can be calculated with guaranteed accuracy. The real part of the plotted GF is not singular at the origin and its values calculated with and without the analytical extraction coincide. V. CONCLUSIONIn this paper, a rigorous way to extract the singularity of the spatial GFs for a sheet electric current over a dielectric coated cylinder is proposed. The spatial GFs are required to analyze cylindrical microstrip antennas. Up to now the direct rigorous numerical calculation of the spatial GFs using the IFT in practice was not possible because of the hidden singularity. The singular part of the spatial GFs is derived in an analytical form. The remaining part of the spatial GFs is calculated numerically with guaranteed accuracy. The proposed spatial GFs can be effectively used in the moment method formulation for cylindrical microstrip antennas. Thus, our approach allows extending the concept of the mixed-potential formulation, which proved its efficiency for planar structures, to cylindrical structures. REFERENCES

Miniaturization of a CPW-fed Dual-Band Antenna for GSM 1800/1900 and WLAN 5 GHz Applications

“…A wireless device must support applications like mobile communication, high-speed data communication, and tracking systems, but designing such antennas faces great challenges because of the confined space available inside the devices [1,2]. Different techniques have been proposed for designing dual-band WLAN antennas [3][4][5][6]. Ali et al proposed a dual-band/wideband packaged antenna for IEEE 802.11a WLAN band (5.15~5.35 and 5.725~5.825 GHz) applications [3].…”

“…Different techniques have been proposed for designing dual-band WLAN antennas [3][4][5][6]. Ali et al proposed a dual-band/wideband packaged antenna for IEEE 802.11a WLAN band (5.15~5.35 and 5.725~5.825 GHz) applications [3]. Deshmukh et al presented a technique for increasing bandwidth of microstrip antennas using quarter-wavelength resonant slots [7].…”

Very Compact Open-Slot Antenna for Wireless Communication Systems

“…A dual band microstrip antenna has been reported in [2] by combining two single slotted patch antennas with rectangular ground slot. Ali et al in [3] proposed a dual-band/wideband packaged antenna by using the proximity parasitic coupling between a folded radiator and an extended printed circuit board ground plane. A U-slot antenna with wideband performance is used in [4].…”

A Dual Ultra Wide Band Slotted Antenna for C and X Bands Application

“…However, the most important challenge in microstrip antenna design is to increase the bandwidth and gain [1]. Concurrent dual-band patch antennas were introduced to operate at different frequencies simultaneously [2,3] to provide several advantages, especially, low complexity, low cost, low power consumption, and small size systems. Furthermore, there are rapid developments in several areas of RF and microwave technologies such as wireless and mobile communications and microwave imaging in order to meet the requirements of different applications such as synthetic aperture radar (SAR), shuttle imaging radar, remote sensing radars, and other wireless communication systems operating at L, C and X bands [4].…”