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0
Path 1(S 21 )
−1
Path 2(S )
31
Magnitude (dB) −2
−3
−4
−5
28 30 32 34 36 38 40
Frequency (GHz)
(a)
0
Port 1
−10 Port 2
Magnitude (dB) −20
Port 3
−30
−40
28 30 32 34 36 38 40
Frequency (GHz)
(b)
0
Simulated
Measured
Magnitude (dB) −10
−20
−30
−40
28 30 32 34 36 38 40
Frequency (GHz)
(c)
FIGURE 5.33 (a) Insertion loss, (b) return loss, and (c) isolation measurements [60] of the
K a -band power divider.