Abstract
A novel single-layer, single-feed concentric annular-ring microstrip patch antenna providing triple-frequency operation is proposed and experimentally studied. This is achieved by embedding a small circular patch into a dual stub-loaded concentric annular-ring structure and by employing a cross-slot in the ground plane. The proposed technique can provide triple-band operation and reduce the antenna size by over 50 compared to the conventional annular-ring patch antenna for a given frequency. Experimental results show the proposed antenna to have impedance bandwidths of 6.38, 6.30 and 35 for the three bands, at 1.17, 1.428 and 1.9GHz, respectively. The proposed structure is capable of realising a dramatically small frequency ratio. The measured radiation patterns for each band are presented.
| Original language | English |
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| Pages (from-to) | 1129-1130 |
| Number of pages | 2 |
| Journal | Electronics Letters |
| Volume | 42 |
| Issue number | 20 |
| DOIs | |
| Publication status | Published - 2006 |