THz Patch Radiator Array Using Second-Harmonic Oscillators
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Solution Overview
Problem
Silicon-based terahertz integrated circuits face limitations in generating high-power terahertz signals, which impedes the development of high-performance THz systems due to limited radiated power and efficiency, and existing solutions like slot antennas require expensive silicon lenses and face heat dissipation issues.
Innovation Solution
A scalable coupled oscillator-radiator array architecture using on-chip patch antennas, where the oscillator generates second harmonic power and is coupled with a miniature patch antenna to radiate terahertz electromagnetic radiation, with a quartz superstrate improving radiation efficiency and a low-cost PTFE lens enhancing directivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If silicon-based integrated circuits are used to generate terahertz signals, then the device complexity is reduced and manufacturing is simplified, but the radiated power and generation efficiency are limited
Solution Approach 1:
The radiator is divided into multiple independent radiator units, each comprising an oscillator and a patch antenna. This segmentation allows each unit to contribute to the total radiated power while maintaining individual optimization, thereby increasing overall power output without proportionally increasing system complexity.
Solution Approach 2:
The oscillator and patch antenna are merged into an integrated radiator unit that can be fabricated using standard CMOS processes. This merging enables the complex functionality to be achieved through conventional manufacturing, preventing device complexity from becoming a prohibitive factor.
2Loss of energy
If slot antennas are used to radiate terahertz signals, then the radiation efficiency is improved, but expensive silicon lenses are required and heat dissipation becomes problematic
Solution Approach 1:
The patch antenna design replaces expensive silicon lenses with a cost-effective alternative structure that can be fabricated using standard semiconductor processes. This substitution significantly reduces manufacturing costs while maintaining acceptable radiation efficiency through the integrated oscillator-antenna design.
Solution Approach 2:
The patch antenna serves as an intermediary structure between the oscillator and free space, providing an efficient radiation mechanism without requiring additional expensive optical components. The antenna geometry is optimized to achieve good radiation efficiency intrinsically.
3Power
If higher power terahertz signals are generated, then the application performance is improved, but heat dissipation challenges increase
Solution Approach 1:
By dividing the system into multiple radiator units, the total power generation burden is distributed across several oscillators rather than concentrating heat in a single high-power device. This segmentation enables higher aggregate power output while managing thermal load through distributed heat generation.
Solution Approach 2:
Multiple identical radiator units are replicated and arranged in an array configuration. Each unit operates at moderate power levels, and their combined output achieves the desired high signal power. This copying approach avoids the heat dissipation problems associated with single high-power generators.
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 solution achieves high-power, coherent terahertz signal generation with improved effective isotropic radiated power and directivity, overcoming the limitations of silicon-based technologies while reducing costs and heat dissipation challenges.
Implementation Method 1
an oscillator operable to generate second harmonic power
Implementation Method 2
The transistor is configured and/or controlled to operate in an active region and/or a triode region for facilitating generation of the second harmonic power
Implementation Method 3
a patch antenna operably coupled with the oscillator for radiating terahertz electromagnetic radiation based on the generated second harmonic power
Data Source
AI summary
A radiator for terahertz electromagnetic radiation. The radiator includes one or more radiator units. Each radiator unit includes an oscillator operable to generate second harmonic power, and a patch antenna operably coupled with the oscillator for radiating terahertz electromagnetic radiation based on the generated second harmonic power.