Piezoelectric Micro Antenna for Chip Integration
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Solution Overview
Problem
Conventional antennas are unable to be miniaturized due to the requirement that their dimensions must be comparable to the wavelength of electromagnetic waves they transmit or receive, making integration on electronic chips challenging, and existing piezoelectric-based antennas only operate within acoustic frequency ranges, not applicable for normal communication frequencies above 20 KHz.
Innovation Solution
A micro antenna device using piezoelectric materials that induces radio frequency magnetic fields, causing mechanical vibrations which are measured optically or electrically, allowing for efficient transmission and reception of radio waves at frequencies greater than 20 KHz, with impedance matching and filtering capabilities, enabling integration with electronic components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional metallic antenna structures are used, then electromagnetic wave transmission and reception is achieved, but antenna dimensions must be comparable to the wavelength making miniaturization impossible
Solution Approach 1:
The patent changes the fundamental operating parameter from electromagnetic resonance to piezoelectric mechanical resonance. By using piezoelectric materials that convert electrical signals to mechanical vibrations and back, the antenna can operate at radio frequencies while maintaining dimensions much smaller than the wavelength, resolving the contradiction between miniaturization and transmission capability
Solution Approach 2:
The patent replaces the conventional electromagnetic field-based antenna system with a piezoelectric mechanical vibration-based system. The piezoelectric material acts as a transducer that converts electrical signals to mechanical vibrations (and vice versa), substituting the traditional electromagnetic resonance mechanism with a piezoelectric mechanical resonance mechanism that enables miniaturization
2Volume of moving object
If piezoelectric materials are used for miniaturization, then antenna size is reduced, but existing piezoelectric antennas only operate in acoustic frequency range (20Hz-20KHz) not suitable for normal communication
Solution Approach 1:
The patent changes the frequency parameter by designing piezoelectric resonators with specific dimensions and material properties that resonate at radio frequencies (above 20KHz) rather than acoustic frequencies. By adjusting the physical dimensions, material composition, and electrode configuration of the piezoelectric structure, the resonant frequency is tuned to match communication band requirements while maintaining miniaturized dimensions
3Volume of moving object
If antenna dimensions are reduced for integration on electronic chips, then space is saved, but conventional technology cannot achieve miniaturization below wavelength scale
Solution Approach 1:
The patent changes the operational mechanism parameter from electromagnetic resonance to piezoelectric resonance, which allows the antenna dimensions to be decoupled from the wavelength. This enables miniaturization to chip-scale dimensions while maintaining manufacturing feasibility through standard piezoelectric material deposition and patterning techniques
Solution Approach 2:
The piezoelectric structure serves multiple functions: it acts as both the resonating element and the transducer, combining the functions of the piezoelectric material layer, electrodes, and resonator structure into a single integrated component that can be manufactured using standard semiconductor processing techniques
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
Enables the development of ultra-small antennas capable of operating at frequencies from 10 MHz to 10 GHz, potentially integrating with electronic chips, and improving sensitivity and filtering efficiency in noisy environments.
Implementation Method 1
A piezoelectric material, wherein when a time varying electrical excitation at frequencies greater than 20kHz is applied to the piezoelectric material, this results in the emission of radio waves into free space at the said frequencies
Implementation Method 2
when a radio wave in free space at a frequency greater than 20kHz is applied to the material, this results in an electrical excitation in the material at the said frequencies
Implementation Method 3
The radio frequency magnetic field results in induction of a radio frequency voltage in the piezoelectric material, which is set in mechanical vibration
Data Source
AI summary
The present invention is on an ultra small antenna made of a piezoelectric material. The wavelength of radio signals propagating through the piezoelectric material is shortened because of its high dielectric constant and a resonance between the radio signal and the modes of its mechanical waves at various frequencies results in high amplitude signals in the transmission and reception mode.