Terahertz Antenna Array Layout for Crosstalk and Pixel Defect Reduction
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Solution Overview
Problem
Existing terahertz wave detection systems face challenges in reducing noise and improving framerate for high-resolution imaging due to susceptibility to low-frequency noise and alignment accuracy issues, leading to potential pixel defects and crosstalk between antennas.
Innovation Solution
An antenna device with a loop antenna array on a support substrate, a signal-processing substrate, rectifier elements, and a peripheral electrode configuration that reduces crosstalk and pixel defects by using capacitive coupling and optimized lead line connections, along with recess structures to minimize power loss and improve impedance matching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the arrangement pitch of antennas is narrowed to increase image resolution, then measurement precision is improved, but alignment accuracy becomes more difficult to maintain and bonding defects increase
Solution Approach 1:
The patent divides the connection path into two segments: a first through electrode for signal transmission and a second through electrode for reference potential. This segmentation allows independent optimization of each connection path, reducing the cumulative impact of alignment errors while maintaining high antenna density for high-resolution imaging.
2Reliability
If the number of through electrodes is decreased to reduce bonding defects, then reliability is improved, but potential fluctuation increases and crosstalk worsens
Solution Approach 1:
The connection system is segmented into two functional through electrodes: the first through electrode carries the signal from the antenna to the circuit board, while the second through electrode provides a dedicated reference potential path. This segmentation ensures that signal transmission and reference potential are independently maintained, reducing crosstalk even with a limited number of through electrodes.
Solution Approach 2:
The second through electrode acts as an intermediary that provides a stable reference potential between the antenna substrate and the circuit board. This intermediary reference path isolates the signal path from potential fluctuations, reducing crosstalk without requiring additional signal-carrying through electrodes.
3Object-generated harmful factors
If a common electrode configuration is used to reduce crosstalk, then harmful factors are reduced, but the number of through electrodes increases and bonding defects worsen
Solution Approach 1:
Instead of using a single common electrode that requires multiple through electrodes for proper grounding, the patent segments the grounding function into a second dedicated through electrode that provides reference potential. This segmented approach maintains crosstalk suppression while minimizing the total number of through electrodes required, thereby reducing bonding defects.
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 effectively suppresses crosstalk between antennas, enhances image quality, and increases yield by reducing noise and pixel defects, allowing for higher speed and lower noise operation in terahertz wave detection systems.
Implementation Method 1
a peripheral electrode disposed between the plurality of antennas on the support substrate... the second lead line of the antenna is connected to the peripheral electrode
Data Source
AI summary
An antenna device includes an antenna array constituted by a plurality of antennas disposed on a support substrate, a signal-processing substrate configured to be stacked with the support substrate, a plurality of rectifier elements disposed correspondingly to each of the plurality of antennas, and a peripheral electrode disposed between the plurality of antennas on the support substrate The antenna includes a first part electrically connected to one of terminals of the rectifier element, a second part electrically connected to the other terminal of the rectifier element, a first lead line connected to the first part, a second lead line connected to the second part, and a first through electrode connected to the first lead line and the signal-processing substrate, and the second lead line of the antenna is connected to the peripheral electrode.