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A narrow-size planar monopole antenna for triple-band operation is presented. The proposed antenna consists of a half E-shaped metal patch, a 50 ohm coplanar waveguide (CPW) transmission line and a branch extended from the ground. The narrowness of the antenna is achieved by applying the asymmetric coplanar strip (ACS) structure to the prototype one. The multiband characteristic of the antenna is...
A compact antenna for dual-band operation is presented. The proposed antenna consists of a C-shaped ground plane and an L-shaped monopole radiator. The Γ-shaped stub extending from the ground can achieve a resonance covering the lower band, whereas the L-shaped monopole operates at the upper band. The antenna prototype is designed, fabricated and tested. The experimental results show the antenna covers...
A novel trident-shaped dual-band CPW-fed monopole antenna for PCS/WLAN applications is presented. By inserting two pairs of symmetrical strips in the middle strip of the trident-shaped antenna, dual-frequency operating bands with 10 dB return-loss bandwidths of 33.7 % , ranging from 1.80 to 2.53 GHz, and of about 1100 MHz centred at 5.5 GHz have been achieved. They cover the required bandwidths of...
It is well known that a global positioning system (GPS) receiver needs to `see` at least four satellites to provide a three-dimensional fix solution. But in difficult environments such as an urban canyon, the number of `visible` satellites is often not enough. Wireless fidelity (WiFi) signals have been utilised for positioning mainly based on the fingerprinting technology. However, the accuracy of...
In this paper, a dualband antenna that consists of two radiating slots is studied. The slots are cut onto an L-probe-fed hollow rectangular conducting cavity, which is covered by a protective dielectric layer. Dualband operation can be obtained by exciting the two resonant modes of the two slots. It is found that the frequencies of the two resonant modes can be adjusted independently, which greatly...
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