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Low cost space-fed reconfigurable phased array for spacecraft and aircraft applications

  • US 10,135,137 B2
  • Filed: 02/20/2015
  • Issued: 11/20/2018
  • Est. Priority Date: 02/20/2015
  • Status: Active Grant
First Claim
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1. A phased array antenna system comprising:

  • a front-end circuit including a plurality of antenna channels where each antenna channel includes a front antenna element and a rear antenna element, said front antenna element being operable to receive signals from the environment or transmit signals into the environment, each antenna channel further including a beam scan phase shifter and a true time delay (TTD) phase shifter through which the receive signals or the transmit signals propagate, a variable attenuator positioned between the beam scan phase shifter and the TTD phase shifter that provides signal attenuation, and an amplifier positioned between the beam scan phase shifter and the front antenna element that is a low noise amplifier for the receive signals from the environment or a high power amplifier for transmitting signals into the environment; and

    a back-end circuit spaced apart from the front-end circuit and including a single antenna receiving the receive signals from all of the rear antenna elements or transmitting the transmit signals to all of the rear antenna elements, said back-end circuit further including an ortho-mode transducer that separates the transmit signals or the receive signals into orthogonally polarized signals, said back-end circuit further including a pair of couplers and a pair of polarization phase shifters that combine to adjust the polarization of the transmit signals or the receive signals.

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