Design of a Compact Acs-Fed Dual Band Antenna for Bluetooth/Wlan and Wimax Applications

Abstract

Abstract-In this paper, a compact asymmetric coplanar strip (ACS)-fed printed monopole dualband antenna for 2.4 GHz bluetooth, 5.2/5.8 GHz wireless local area network (WLAN) and 3.5/5.5 GHz worldwide interoperability for microwave access (WiMAX) applications is presented and investigated experimentally. The proposed antenna is composed of a ACS-fed monopole, an arc-shaped strip and an omega-shaped strip, which occupies a compact size of 18 × 22 mm 2 including the ground plane. By properly selecting the positions and lengths of these strips, dual frequency operation with wide impedance bandwidth characterstics can be achieved. The proposed antenna has been validated experimentally and found to have nearly onmidirectional radiation patterns in the H-plane, nearly bi-directional behaviour in the E-plane and acceptable peak gain across operating bands.

Acs Feed Compact Multiband Antenna for Personal Wireless Communication Applications

“…Small discrepancy between simulated and measured results can be observed due to deficiency in fabrication process of the prototype, uncertainty of thickness and/or the dielectric constant r of the FR-4 substrate, quality of SMA connectors and losses incurred by cables connecting the prototype and VNA. However, at low frequencies, the electrical size of the ground plane becomes relatively smaller than operating wavelength, thus a part of the connecting cables attached to the VNA acts as an additional ground plane for the antenna that provides electrical path for some current flowing back from antenna to the feeding cable [16]. Furthermore, to nullify the discrepancies in simulated and measured results of the proposed antenna, SMA and cable effects are investigated.…”

“…However, integration of these antennas with RF-MIC circuits with limited access to only service in WiMAX/WLAN frequency bands is a difficult task. Asymmetrical coplanar strip (ACS) feed multiband antennas provide easy integration solutions with RF-MIC have been reported in [11][12][13][14][15][16][17]. In general, an ACS feed antenna provides about 50% size reduction compared to the traditional CPW feed antenna as only one half the ground plane of the CPW structure is considered [16].…”

“…The proposed antenna has the most compact dimensions and satisfactory stable gain and provides services in 2.4 GHz Bluetooth, 3.3/5.5 GHz WiMAX, 2.4/5.2/5.8 GHz WLAN frequency bands with acceptable gain of 4.5 dB. [12] 35 × 19 2.4/3.5/5.5 GHz Tri band [13] 37.5 × 24 2.4 GHz Dual band [14] 28 × 30 2.4/3.5/5.5 GHz Dual band [15] 21 × 19 2.4/5.2 GHz Dual band [16] 18 × 22 2.4/3.5/5.5 GHz Dual band [17] 17 × 17. Figure 1 shows the geometrical configuration of the proposed ACS feed triple-band antenna.…”

DESIGN & DEVELOPMENT OF COMPACT UNIPLANAR SEMI-HEXAGONAL ACS FED MULTI-BAND ANTENNA FOR PORTABLE SYSTEM APPLICATION

“…A smart feeding configuration, ACS, which adopts the principle of Coplanar Waveguide (CPW) feeding has been recently described in [11][12][13][14][15][16][17][18][19][21][22][23][24]. These antennas are generally smaller than simple coplanar waveguide (CPW)-fed antenna.…”

“…Fig. 1 shows a basic ACS-fed antenna which has one-half of the ground plane so that it has a smaller size than a simple coplanar waveguide CPW-fed antenna [11][12][13][14][15][16][17][18][19]. Most of the reported printed antennas (tri-band and dual-band) are larger in size and only operate at limited frequency in WLAN/WiMAX bands.…”