Compact differential bias tee
AssigneeCiena Corporation
InventorsBakhtiar Ali Khan, Michael Vitic, Gregory Brookes, Andrew Man Kin Lau
Life of this patent
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Abstract
Aspects of the subject disclosure may include, for example, a differential biasing device that includes first and second bias tees having respective high-frequency biased terminals, high-frequency unbiased terminals and biasing terminals. The first and second bias tees can be configured at least partially on and/or within different layers of a substrate to facilitate a compact configuration. The layers can include surface layers and/or internal layers that enable an overlapping of at least portions of the first and second bias tees. Other embodiments are disclosed.
Claims20
A differential biasing device comprising:
- a first bias tee positioned at least partially along a first layer of a substrate, wherein the first bias tee comprises a first biased radio frequency (RF) terminal, a first unbiased RF terminal and a first biasing terminal;
- and
- a second bias tee positioned at least partially along a second layer of the substrate, wherein the second bias tee comprises a second biased RF terminal, a second unbiased RF terminal and a second biasing terminal, and wherein the first layer differs from the second layer facilitating a compact configuration of the first bias tee and the second bias tee.
A method of fabricating a differential biasing assembly comprising:
- providing a first bias tee positioned at least partially along a first layer of a substrate, wherein the first bias tee comprises a first biased high-frequency terminal, a first unbiased high-frequency terminal and a first biasing terminal;
- and
- providing a second bias tee positioned at least partially along a second layer of the substrate, wherein the second bias tee comprises a second biased high-frequency terminal, a second unbiased high-frequency terminal and a second biasing terminal, and wherein the first layer differs from the second layer facilitating a non-coplanar configuration of the first bias tee and the second bias tee.
A differentially driven modulator system comprising:
- a differential input port comprising a first input terminal and a second input terminal, wherein the differential input port is configured to receive a differential input signal;
- a first bias tee in communication with the first input terminal and positioned at least partially along a first layer of a substrate, wherein the first bias tee comprises a first biased radio frequency (RF) terminal, a first unbiased RF terminal and a first biasing terminal;
- a second bias tee in communication with the second input terminal and positioned at least partially along a second layer of the substrate, wherein the second bias tee comprises a second biased RF terminal, a second unbiased RF terminal and a second biasing terminal;
- and
- an output port comprising a first output terminal in communication with the first bias tee, wherein the first output terminal is configured to drive a modulator according to a first portion of the differential input signal, while inhibiting an application of the first biasing voltage to the modulator.
Dependencies are inferred from the claim text.