Predistortion linearizer and method employing uniplanar Magic T

Details Predistortion linearizer and method employing uniplanar Magic T Predistortion linearizer and method employing uniplanar Magic T

1996-08-28

1997-12-30

Mullins, James B.

Amplifiers

Hum or noise or distortion bucking introduced into signal...

455 63, H03F 132

Patent

active

057035318

ABSTRACT:
Operating on the principle of vector summation, a predistortion linearizer includes a signal divider on one side of a substrate plate that divides a microwave signal into a linear portion and a nonlinear portion. Signal energy on both the nonlinear and linear portions is coupled into two respective slotline transmission lines on the substrate by uniplanar Magic T hybrids. As the signals are transmitted along the slotlines, their relative amplitudes and phases are adjusted to introduce a distortion inverse to that expected in a subsequent amplification. The linear portion and nonlinear portion pass through another pair of baluns. The signals are then combined by an in-phase summation on the same side of the plate as the input signal divider.

REFERENCES:
patent: 4902983 (1990-02-01), Fujiki et al.
patent: 5304944 (1994-04-01), Copeland et al.

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