Wave transmission lines and networks – Plural channel systems – Having branched circuits
Reexamination Certificate
2006-03-14
2006-03-14
Takaoka, Dean (Department: 2817)
Wave transmission lines and networks
Plural channel systems
Having branched circuits
C333S08100R
Reexamination Certificate
active
07012478
ABSTRACT:
The invention relates to a method to control the power of millimeter waves for a V-band TR module. According to said method, the output power is detected and controlled at a constant level with an electronic control circuit by means of a variable attenuator. The invention proposes that in transmit mode, for operation at a frequency in the 60 GHz range and higher, a first SPDT (single pole double throw) MMIC switch is used as a variable attenuator and a second SPDT MMIC switch which acts as a transmit-receive switch is used as an output power detector. In receive mode, both SPDTs are used as switches. Overall, the power control for the entire TR module results in an increase of the module yield through compensation of chip spread and temperature effects. The multiple use of the SPDT MMICs as switches, variable attenuator and power detector saves costs.
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Filleboeck Marion
Schroth Joerg
Crowell & Moring LLP
EADS Deutschland GmbH
Takaoka Dean
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