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Advances in Electrical Engineering
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Advances in Electrical Engineering
/
2014
/
Article
/
Fig 15
/
Research Article
Design of Tunable Monopole Arm Planar Spiral Antenna for Cognitive Radio
Figure 15
Relative power pattern (dB) plots in
-plane (
) at 2.15 GHz for D1, D2, and D3-ON.