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US 11,539,387 B2Granted
Efficient dual-polarization multi-input and multi-output system
AssigneeApple Inc.
InventorsRastislav Vazny, Joonhoi Hur
Life of this patent
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Abstract
Systems and methods for extracting polarized sub-signals from a dual-polarized signal includes isolating the polarized sub-signals using one or more filters. When a single filter is used to derive a first sub-signal, analog interference cancellation may be used to derive the second sub-signal. When two filters are used, the first and second sub-signals may each be derived using a corresponding filter.
Claims20
Isolation circuitry, comprising:
- an input configured to receive a dual-polarized signal having a first polarized component having a first frequency and a second polarized component having a second frequency;
- a first N-path filter having a first frequency response configured to remove the first polarized component from the dual-polarized signal to derive a first signal having the second polarized component;
- and
- a second N-path filter having a second frequency response configured to remove the second polarized component from the dual-polarized signal to derive a second signal having the first polarized component.
1 more element
An electronic device having an isolation circuitry, comprising:
- an antenna configured to receive wireless signals and generate a dual-polarized signal over a radio-frequency cable;
- a first N-path filter electrically coupled to the antenna and configured to filter the dual-polarized signal to obtain a first polarized signal having a first frequency;
- a second N-path filter coupled to the antenna and configured to filter the dual-polarized signal to obtain a second polarized signal having a second frequency;
- a first output configured to output the first polarized signal to a first path;
- and
- a second output configured to output the second polarized signal to a second path.
3 more elements
A method, comprising:
- receiving, at an input to isolation circuitry, a dual-polarized signal;
- filtering, in the isolation circuitry, the dual-polarized signal using a first N-path filter to obtain a first polarized signal having a first frequency;
- filtering, in the isolation circuitry, the dual-polarized signal using a second N-path filter to obtain a second polarized signal having a second frequency;
- outputting the first polarized signal to a first path after filtering the dual-polarized signal using the first N-path filter;
- and
- outputting the second polarized signal to a second path after filtering the dual-polarized signal using the second N-path filter.
3 more elements
Dependencies are inferred from the claim text.