Millimeter Wave Phase Shifter Isolation for Parasitic Reduction
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Solution Overview
Problem
Designing millimeter wave phase shifters that minimize losses and parasitic effects in miniaturized circuits to achieve continuous phase shifts from 0 to 360° is challenging, especially when operating at frequencies beyond their original design range, such as 77 GHz, due to parasitic capacitance and other unwanted effects introduced by compact circuitry.
Innovation Solution
A phase shifter with high frequency component isolation is developed, utilizing a robust topology with low amplitude variation and a small MIMIC layout size, capable of operating in millimeter wave frequencies, which mitigates parasitic effects and provides continuous phase shifts, suitable for wireless communications and autonomous driving applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If miniaturized circuits are used to reduce size, then device compactness is improved, but parasitic effects and losses increase
Solution Approach 1:
The patent extracts and removes parasitic elements from the circuit model to analyze their impact separately. By identifying specific parasitic components (capacitance, inductance, resistance) and their locations in the miniaturized circuit, the design can针对性地 address each parasitic effect through compensation techniques or layout optimization, thereby reducing their harmful impact while maintaining compact dimensions.
Solution Approach 2:
The patent employs parameter optimization to balance circuit size against performance degradation. By adjusting geometric parameters, material properties, and circuit topology parameters, the design achieves minimal parasitic effects for a given size constraint. This involves optimizing trace widths, spacing, layer configurations, and component placements to minimize parasitic capacitance and inductance while maintaining the miniaturized form factor.
2Adaptability or versatility
If circuits are designed for one frequency, then frequency specificity is improved, but performance at other frequencies deteriorates
Solution Approach 1:
The patent designs the miniaturized circuit with universal performance characteristics across multiple frequency ranges. This involves creating a circuit topology and impedance configuration that maintains acceptable performance at both the original design frequency and extended frequencies (including millimeter wave bands). The design achieves this through careful control of parasitic elements and optimization of transmission line characteristics to provide broad frequency adaptability.
Solution Approach 2:
The patent incorporates dynamic compensation mechanisms to maintain performance consistency across varying frequencies. This may involve using可调 components or active circuitry that can adapt to frequency changes, or designing passive elements with frequency-independent characteristics. The circuit dynamically adjusts its behavior to compensate for frequency-dependent parasitic effects, ensuring reliable operation across a wide frequency spectrum.
3Volume of moving object
If phase shifters are miniaturized to achieve compact beam steering, then device size is reduced, but losses increase
Solution Approach 1:
The patent segments the phase shifter into multiple independent unit cells or functional blocks. Each segment can be optimized independently for minimal loss while contributing to the overall phase shifting function. This segmentation allows the use of lower-loss transmission line configurations in each segment and reduces the cumulative impact of parasitic losses across the entire miniaturized structure.
Solution Approach 2:
The patent employs composite material structures in the miniaturized phase shifter design, combining different substrate materials, conductor types, and dielectric layers to achieve optimal performance. By selecting materials with complementary properties (low loss tangent, high conductivity, appropriate permittivity), the design minimizes signal losses while maintaining compact dimensions. The composite structure allows for optimized current distribution and reduced resistive losses.
Data Source
AI summary
Examples disclosed herein relate to a high frequency component isolation for wireless and radar systems. The disclosure herein includes a radar system that has an array of radiating elements and a phase control module coupled to the array of radiating elements. The phase control module is configured to isolate one or more transmission signal paths through the phase control module from at least one conductor electrically coupled to one or more active circuits in the phase control module, the at least one conductor proximate to the one or more transmission signal paths. The phase control module is configured to adjust a reactance in a transmission signal propagating through the isolated one or more transmission signal paths to one or more radiating elements of the array of radiating elements. Other examples disclosed herein include beamforming system with high frequency component isolation and a method of beamforming with high frequency component isolation.