Fig. 25From: Efficient design of a wideband tunable microstrip filtenna for spectrum sensing in cognitive radio systemsThe suggested filtenna’s simulated and measured normalized radiation patterns at a \(\phi ={0}^{^\circ }\) and b \(\phi ={90}^{^\circ }\) planes at \(f=2.4 GHz\) and c \(\phi ={0}^{^\circ }\) and d \(\phi ={90}^{^\circ }\) planes at \(f=3.3\,\text{GHz}\)Back to article page