Tracking system with orthogonal polarizations and a retro-directive array
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United States of America Patent
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Apr 5, 2016
Grant Date -
Aug 27, 2015
app pub date -
Apr 27, 2015
filing date -
Mar 1, 2011
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Abstract
The disclosed embodiments relate to a retro-directive array that facilitates a tracking operation. This retro-directive array includes a first antenna configured to receive an input signal which is substantially circularly polarized from a tracking device. The first antenna separates the input signal into two signal components (e.g., Ex and Ey) associated with different orthogonal polarizations, wherein the two signal components comprise a quadrature signal wherein Ey=j·Ex. The retro-directive array also includes a bi-directional quadrature gain (BQG) module coupled to the first antenna which is configured to boost the quadrature signal. It additionally includes a second antenna which configured to transmit the boosted quadrature signal to the tracking device. The disclosed embodiments also relate to a transceiver switch, which includes: an input configured to receive a signal to be transmitted, and two phase mixers configured to receive the signal to be transmitted and phase inputs I and Q, and to produce a signal comprising two quadrature signal components SI and SQ, respectively, wherein SQ=j SI. The transmit switch also includes a hybrid coupler, which is configured to combine SI phase shifted by 180° with SQ phase shifted by 90° to produce a transmit output which is proportionate to S; and a switching mechanism configured to turn off the transmit output by swapping the phase inputs I and Q to the phase mixers.
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Patent Owner(s)
- QUALCOMM INCORPORATED
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Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Aryanfar, Farshid | Allen, US | 46 | 504 |
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