| 摘要 |
PROBLEM TO BE SOLVED: To provide a power feeding method that enables unit microwave transistors of comb-shaped structure to be set zero in phase difference between them, prevents deteriorating in gain, and keeps high output. SOLUTION: Provided that the m-th gate finger 5 from an input point is Zum in length, and a gate pitch is represented by GP, an electric length differenceΔL2 between a gate (first) nearest to the input point and a farthest gate (m-th) from the input point is represented by a formula,ΔL2=2(m-1)GP +2(Zum-Zu1), where M is an integer above 1. Therefore, the gate fingers 5 are varied in length Zum, wherebyΔL2 can be reduced to zero. By this setup, signals can be set identical to each other in phase from an input point, so that a problem of phase difference can be solved. Moreover, a gate bus line 4 and bypass wire 7 are provided.
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