Single ku-band multi-polarization gallium arsenide transmit chip
AssigneeITT Manufacturing Enterprises, Inc.
InventorMasud Jenabi
Life of this patent
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Abstract
The present invention is a wide band GaAs microwave monolithic integrated circuit (MMIC) transmit chip that is capable of transmitting linearly or circularly polarized signals when connected to a pair of orthogonal cross-polarized antennas. In an active phased-array antenna environment, this transmit chip is capable of transmitting signals with different scan angles. This invention also contains a digital serial to parallel converter that uses TTL signal to control the phase shifter and attenuator circuits that are required for controlling the polarization and scan angle of the transmitted signal.
Claims10
An antenna comprising:
- a first substrate containing a plurality of transmitter chips, wherein each transmitter chip is comprised of a first series of phase shifters to control the scan angle and linear polarization of a first RF signal, a first 90° phase shifter to control the circular polarization of the first RF signal, and a first means for controlling the first series of phase shifters and the first 90° phase shifter;
- a second substrate containing a plurality of transmitter chips, connected at the output of the first substrate, wherein each transmitter chip is comprised of a second series of phase shifters to control the scan angle and linear polarization of a second RF signal, a second 90° phase shifter to control the circular polarization of the second RF signal, and a second means for controlling the second series of phase shifters and the second 90° phase shifter;
- and
- a balun substrate connected at the output of the second substrate containing a number of baluns that divides an RF signal into two equal signals that are 180° out of phase with each other.
Dependencies are inferred from the claim text.