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Advances in Electrical Engineering
Table of Contents
Advances in Electrical Engineering
/
2014
/
Article
/
Fig 10
/
Research Article
Design of Tunable Monopole Arm Planar Spiral Antenna for Cognitive Radio
Figure 10
Relative power pattern (dB) plots in
-plane (
) without diode.
(a)
1.93 GHz
(b)
2.79 GHz
(c)
3.47 GHz
(d)
4.45 GHz