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US 10,770,771 B2Granted
Variable capacitors and switches fabricated using electrowetting on dielectric techniques and related phase shifters, base station antennas and other devices
AssigneeCommScope Technologies LLC
InventorsScott L. Michaelis, Igor Timofeev, Michael Brobston, Beatriz Blazquez
Life of this patent
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Abstract
An adjustable phase shifter includes an RF signal input, an RF signal output, a first delay line, a second delay line and a first electrowetting-activated switch disposed between the RF signal input and the RF signal output.
Claims23
An adjustable phase shifter, comprising:
- a radio frequency (“RF”) signal input;
- an RF signal output;
- a first delay line;
- a second delay line;
- a first electrowetting-activated switch configured to selectively open and close an electrical path between the RF signal input and the RF signal output.
2 more elements
An adjustable phase shifter, comprising:
- a radio frequency (“RF”) signal input;
- an RF signal output;
- a first delay line;
- a first electrowetting-activated switch that is configured to selectively make and break an electrical connection between the RF signal input and a first end of the first delay line;
- and
- a second electrowetting-activated switch that is configured to selectively make and break an electrical connection between the RF signal output and a second end of the first delay line.
3 more elements
An adjustable phase shifter, comprising:
- a hybrid coupler that has a first port coupled to a radio frequency (“RF”) input, a second port coupled to a first variable delay line, a third port coupled to a second variable delay line and a fourth port coupled to an RF output,
- wherein a first length of the first variable delay line is adjustable by using electrical control signals to control a position of a droplet of liquid material along the first variable delay line.
A phase shifter comprising:
- a first unit cell comprising first and second switches that are coupled to each other by a first delay line having a first length;
- and
- a second unit cell comprising third and fourth switches that are coupled to each other by a second delay line having a second length that is longer than the first length,
- wherein the first unit cell is coupled in series with the second unit cell, and
- wherein the first unit cell further comprises a third delay line having a third length that is shorter than the first length.
2 more elements
Dependencies are inferred from the claim text.