E-fuse Phase Shifter for Low-Attenuation Beam Steering
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Solution Overview
Problem
Active beam steering systems in phased array antennas suffer significant signal attenuation, making them unsuitable for applications where power conservation is critical, such as in power-sensitive sensors and fixed-location base stations.
Innovation Solution
The use of one-time programmable e-fuses in phase shifter elements within phased array antennas, which set the beam direction once by selectively blowing certain e-fuses, eliminating the need for active tuning and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If tunable t-line phase shifters are used to achieve active beam steering, then the direction of the beam can be dynamically changed, but significant signal attenuation occurs (6 dB to 8 dB at 60 GHz)
Solution Approach 1:
The patent applies preliminary action by pre-configuring the phase shifter elements with e-fuses that are blown during manufacturing or initialization to set the desired beam direction. This one-time programming establishes the beam steering configuration in advance, eliminating the need for continuous active tuning and the associated signal attenuation that occurs with dynamically adjustable phase shifters.
2Adaptability or versatility
If tunable t-line phase shifters with powered elements are used, then active beam steering is achieved, but power consumption increases
Solution Approach 1:
The patent extracts the active tuning components (powered switches and control circuits) from the phase shifter design, replacing them with passive e-fuse elements. This removal of active components eliminates the continuous power consumption required for dynamic beam steering, while still achieving beam direction control through the pre-configured phase shifts established by the blown e-fuses.
3Loss of energy
If e-fuses are used in phase shifter elements, then signal attenuation is minimized, but the system can only be configured once during manufacturing
Solution Approach 1:
The patent resolves this contradiction by applying preliminary action - the e-fuses are programmed and blown during manufacturing or system initialization to establish the desired beam direction. This one-time configuration achieves the low signal attenuation characteristic of passive components while providing sufficient adaptability for applications where the beam direction is determined in advance, such as fixed-location base stations and power-sensitive sensors.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach achieves beam steering with minimal signal attenuation, enhancing signal-to-noise ratio and bandwidth while reducing power usage, suitable for next-generation wireless communication systems like 5G.
Implementation Method 1
the phase shifter element has a first phase shift when the at least one e-fuse is unbroken and a second phase shift, different from the first phase shift, when the at least one e-fuse is broken
Data Source
AI summary
A system utilizes e-fuses in phase shifter elements of a phased array antenna to achieve a desired direction of a beam formed by the phased array antenna. A phase shifter element includes: a transmission line structure comprising a signal line, a ground return line, a capacitance line, and an inductance return line; and at least one e-fuse connected to the transmission line structure, wherein the phase shifter element has a first phase shift when the at least one e-fuse is unbroken and a second phase shift, different from the first phase shift, when the at least one e-fuse is broken.