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Table 3 The suggested tunable BPF’s 10 dB BW and IL at various resonance frequencies

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