Design of Tunable Monopole Arm Planar Spiral Antenna for Cognitive Radio

<table class="table-group" id="tab1"><tr><td><table class="table"><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td align="left">Parameter</td><td align="center">Simulated frequency (GHz)</td><td align="center">Peak gain (dB)<br/>Simulated/measured</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td align="left">Selective resonant bands </td><td align="center">1.93, 2.79, 3.47, 4.45</td><td align="center">2.78/2.65</td></tr><tr><td align="left">Wideband </td><td align="center">5.7–15</td><td align="center">3.4/3</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

Frequency band and gain analysis for antenna with diodes OFF.

Advances in Electrical Engineering

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Table 1

Table 1: Design of Tunable Monopole Arm Planar Spiral Antenna for Cognitive Radio 