High-frequency temperature-variable attenuator

Details High-frequency temperature-variable attenuator High-frequency temperature-variable attenuator

2006-10-10

2006-10-10

Jones, Stephen E. (Department: 2817)

Wave transmission lines and networks

Attenuators

C338S216000

Reexamination Certificate

active

07119632

ABSTRACT:
An absorptive temperature-variable microwave attenuator is produced using at least two temperature-variable (or fixed) resistors in series with a transmission line. The temperature coefficients of the temperature-variable resistors are selected so that the attenuator changes at a controlled rate with changes in temperature while attenuator remains relatively matched to the transmission line. In one embodiment, the resistors are thick-film resistors and a variety of temperature coefficients can be created for each resistor by properly selecting and mixing different inks when forming the resistors. Furthermore, attenuators can be created having either a negative temperature coefficient of attenuation or a positive temperature coefficient of attenuation.

REFERENCES:
patent: 5332981 (1994-07-01), Mazzochette et al.
patent: 6081728 (2000-06-01), Stein et al.
patent: 6480093 (2002-11-01), Chen
patent: 2002208803 (2002-07-01), None

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