Chip-Scale RF Localization Using Dual-Frequency Antennas
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Solution Overview
Problem
Conventional localization techniques suffer from insufficient accuracy, low signal-to-noise ratio, susceptibility to background clutter, lengthy refresh rates, high cost, and large size, limiting their applicability to a narrow range of environments and applications.
Innovation Solution
A micro-localization system utilizing RF signals with different center frequencies and polarizations, integrated into chip-scale devices, to improve signal fidelity and reduce interference, enabling accurate and cost-effective localization in various environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional localization techniques (GPS, RSSI, optical processing) are used, then localization capability is provided, but accuracy and precision are insufficient
Solution Approach 1:
The patent changes the fundamental parameter of RF signal frequency from conventional lower frequencies to millimeter-wave frequencies (30-300 GHz, specifically 50-70 GHz and 100-140 GHz). This parameter change enables higher precision localization through improved signal resolution and reduced wavelength, directly addressing the accuracy and signal-to-noise ratio limitations of conventional techniques
Solution Approach 2:
The patent replaces conventional mechanical or electronic localization systems with an integrated semiconductor die-based RF system. The semiconductor die integrates multiple functions (signal generation, modulation, reception, and processing) into a single chip, substituting complex mechanical assemblies with solid-state electronic components to achieve higher precision and reliability
2Measurement precision
If conventional localization systems are implemented, then localization function is achieved, but device size is large
Solution Approach 1:
The patent merges multiple discrete localization system components into a single integrated semiconductor die. The die integrates RF signal generation, frequency mixing, modulation, and processing circuits into one compact chip, dramatically reducing device volume while maintaining or improving localization precision through integrated architecture
Solution Approach 2:
The patent implements a nested structure where the semiconductor die (containing integrated circuits) is mounted on a substrate, which itself may be part of a larger device assembly. This nested arrangement allows the high-precision localization function to be contained in a compact die while providing interface capabilities through the substrate level
3Productivity
If conventional localization techniques are used, then basic localization is provided, but refresh rate is slow due to computational complexity
Solution Approach 1:
The patent replaces computationally intensive signal processing with integrated circuit-based processing on the semiconductor die. The circuitry performs RF signal generation, frequency mixing, and time-of-flight calculations through dedicated hardware circuits rather than general-purpose computational algorithms, enabling real-time refresh rates with reduced computational complexity
4Measurement precision
If conventional localization systems are deployed, then localization capability is achieved, but cost is high
Solution Approach 1:
The patent employs standard semiconductor fabrication processes to manufacture the localization system on commodity substrates. The use of conventional CMOS or similar semiconductor manufacturing techniques enables high-volume, low-cost production, making precise localization accessible while maintaining measurement precision through integrated circuit design rather than expensive specialized components
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
The system achieves millimeter and sub-millimeter localization accuracy with real-time tracking capabilities, operating up to 20-40 meters and resolving target locations in milliseconds, suitable for diverse applications including gaming and autonomous systems.
Implementation Method 1
a transmit antenna fabricated on the substrate and configured to transmit, to a target device, a first radio-frequency (RF) signal at least at a first center frequency
Implementation Method 2
a receive antenna fabricated on the substrate and configured to receive, from the target device, a second RF signal at least at a second center frequency different than the first center frequency
Implementation Method 3
the circuitry comprises a frequency mixer configured to generate, using the first RF signal and the second RF signal, a first mixed RF signal
Data Source
Figure 1A
Figure 1B
Figure 2
AI summary
A device comprising: a substrate; a semiconductor die mounted on the substrate; a transmit antenna fabricated on the substrate and configured to transmit radio-frequency (RF) signals at least at a first center frequency; a receive antenna fabricated on the substrate and configured to receive RF signals at least at a second center frequency different than the first center frequency; and circuitry integrated with the semiconductor die and configured to provide RF signals to the transmit antenna and to receive RF signals from the receive antenna.