From: Efficient design of a wideband tunable microstrip filtenna for spectrum sensing in cognitive radio systems
Resonance frequency (GHz)
10dB BW (MHz)
IL (dB)
1.9655
59
− 2.2
2.2925
55
− 2
2.7165
50
− 1.7
2.985
48
− 1.5
3.7
40
− 1.6
3.9
35
− 2.1