Antenna isolation in a multi-band antenna system
AssigneeAmazon Technologies, Inc.
InventorsJerry Weiming Kuo, Ming Zheng, Jay William Kruse
Life of this patent
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Abstract
An apparatus includes a first reactive component coupled between a first antenna and a second antenna in a multi-band antenna system. The apparatus further includes a first operation circuit coupled to the first reactive component. The first reactive component and the first operation circuit together form a signal path to enable signal flow between the first and the second antennas when the first and the second antennas are operating at a first frequency. The first operation circuit disables signal flow along the signal path when the first and the second antennas are operating at a second frequency.
Claims18
A mobile computing device comprising:
- a first antenna to send and receive radio frequency (RF) signals at 2.4 gigahertz (GHz) and at 5 GHz;
- a second antenna to send and receive RF signals at 2.4 GHz and at 5 GHz;
- a conductive element in proximity to the first and the second antennas, the conductive element causing signal coupling between the first and the second antennas via an over-the-air signal path when the first and the second antennas are operating at 2.4 GHz, wherein a first signal along the over-the-air signal path has a first phase;
- a first reactive component coupled between the first antenna and the second antenna, wherein the first reactive component comprises a shunt circuit comprising at least one of a capacitor or an inductor;
- and
- a first band-pass filter circuit coupled in series with the first reactive component, wherein the first band-pass filter circuit and the first reactive component together form a signal path for a second signal to flow between the first and the second antennas when the first and the second antennas are operating at 2.4 GHz, the second signal having a second phase that is 180 degrees offset from the first phase, and wherein the first band-pass filter circuit disables signal flow between the first and the second antennas when the first and the second antennas are operating at 5 GHz.
An apparatus comprising:
- a first reactive component coupled between a first antenna and a second antenna in a multi-band antenna system, wherein the first reactive component comprises a shunt circuit comprising at least one of a capacitor or an inductor;
- and
- a first operation circuit coupled to the first reactive component,
- the first reactive component and the first operation circuit together forming a signal path to enable signal flow between the first and the second antennas when the first and the second antennas are operating at a first frequency and wherein the first operation circuit disables signal flow along the signal path when the first and the second antennas are operating at a second frequency.
A method comprising:
- enabling, by a first operation circuit coupled to a first reactive component between a first antenna and a second antenna in a multi-band antenna system, signal flow between the first and the second antennas along a signal path formed by the first reactive component and the first operation circuit when the first and the second antennas are operating at a first frequency, wherein the first reactive component comprises a shunt circuit comprising at least one of a capacitor or an inductor;
- and
- disabling, by the first operation circuit, signal flow between the first and the second antennas along the signal path when the first and second antennas are operating at a second frequency different from the first frequency.
Dependencies are inferred from the claim text.