Balanced phase modulator used in microwave band

Details Balanced phase modulator used in microwave band Balanced phase modulator used in microwave band

1994-09-23

1995-10-10

Grimm, Siegfried H.

Modulators

Phase modulator

Including discrete semiconductor device

455 42, 455111, H03C 308, H04L 2720

Patent

active

054574366

ABSTRACT:
A phase modulator for a microwave band having a desirable modulation characteristic by maintaining the impedance thereof constant, includes two PIN diodes 2 and 3 connected to a merchant balun 1 and a bias circuit 18 which supplies bias voltages to the PIN diodes 2 and 3 such that the sum of the bias voltages applied to the diodes 2 and 3 is constant. The bias voltages are selected so as to have the input and output impedances to be in the most stable state when a modulation signal is equal to zero.

REFERENCES:
patent: 4355289 (1982-10-01), Beyer et al.
patent: 4453257 (1984-06-01), Lo et al.

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