Optically controlled reconfigurable band-notched UWB antenna for cognitive radio systems
Research output: Contribution to journal › Article › Scientific › peer-review
Details
| Original language | English |
|---|---|
| Pages (from-to) | 1502-1504 |
| Number of pages | 3 |
| Journal | Electronics Letters |
| Volume | 50 |
| Issue number | 21 |
| DOIs | |
| Publication status | Published - 9 Oct 2014 |
| Publication type | A1 Journal article-refereed |
Abstract
A compact optically controlled ultra-wideband (UWB) antenna with reconfigurable band-notched characteristics is investigated for cognitive radio (CR) applications. The rejection mechanism is realised by etching one symmetric folded slot on the U-shaped radiation patch and the essence of the reconfigurable function is achieved by laser controlling photoconductive switches to change the effective length of the folded slot. A prototype with an overall size of 25 × 25 × 0.8 mm3 is designed and constructed. On the basis of simulated and measured results, the proposed antenna exhibits good radiation behaviour and operates in a wide band with the performance of switchable band rejection of the wireless local area network (WLAN) 2.4 GHz (2.2-2.9 GHz), worldwide interoperability for microwave access (WiMAX) (3.2-4.7 GHz), WLAN 5 GHz (4.8-6.6 GHz) and the ITU 8 GHz (7.5-8.7 GHz).