Polarizer assisted star isolation method
AssigneeBAE Systems Information and Electronic Systems Integration Inc.
InventorsAlexander D. Johnson, Jonothan S. Jensen
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Abstract
A Simultaneous Transmit and Receive (STaR) system utilizing high power transmitters and high sensitivity receivers in conjunction with one or more signal polarizers to maintain far-field polarization efficiency for both transmission and reception of same (or similar) frequency content at the same time. This STaR system maintains far-field polarization efficiency to remote target(s) while simultaneously introducing a near-field polarization mismatch between the transmission and receiver subsystems for higher isolation and reduced coupling.
Claims20
A simultaneous transmit and receive (STaR) system comprising:
- a transmitter subsystem having at least one transmit antenna operable to generate a first signal to a remote target, wherein the transmitter subsystem, the first signal, and a second signal from the remote target are co-polarized;
- a receiver subsystem having at least one receiver antenna operable to receive the second signal from the remote target, wherein the receiver subsystem is orthogonally polarized relative to the polarization of the second signal;
- and
- at least one polarizer between the remote target and the receiver subsystem operable to convert the polarization of the second signal to have a polarization that is substantially orthogonal to the first signal and substantially the same as the polarization of the receiver subsystem.
A simultaneous transmit and receive (STaR) system comprising:
- a transmitter subsystem having at least one transmit antenna operable to generate a first signal to a remote target;
- a receiver subsystem having at least one receiver antenna operable to receive a second signal from the remote target, wherein the transmitter subsystem, the first signal, the receiver subsystem, the second signal, and the remote target are co-polarized;
- and
- at least one polarizer between the transmitter subsystem and receiver subsystem operable to convert the polarization of substantially all portions of the first signal that are directed from the transmitter subsystem to the receiver subsystem to have a polarization that is orthogonal to the polarization of the receiver subsystem.
A method of reducing self-interference in simultaneous transmit and receive (STaR) system comprising:
- generating a first signal having a first polarization from a transmitter subsystem towards a co-polarized remote target;
- receiving a second signal having the first polarization from the co-polarized remote target with a receiver subsystem;
- and
- changing the first polarization of one of all portions of the first signal that are directed from the transmitter subsystem to the receiver subsystem and the entire second signal to have a second polarization that is orthogonal to the first polarization.
Dependencies are inferred from the claim text.