Liquid Crystal Patch Antenna Layout for Lower Dielectric Loss
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Solution Overview
Problem
Existing electronic devices with antenna capabilities face challenges in achieving optimal performance and operational reliability due to limitations in structural design, particularly in terms of dielectric loss of electromagnetic waves and risk of substrate deterioration during processing.
Innovation Solution
The electronic device incorporates a first substrate with phase shifters, a second substrate with patches, a common electrode layer, a dielectric layer, and a liquid-crystal layer, where the patch and common electrode are formed on the same side of the second substrate, reducing the risk of substrate cracks and dielectric loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the patch and common electrode are formed on opposite sides of the second substrate, then the structural design is simpler, but the substrate is more prone to cracks and dielectric loss increases during processing
Solution Approach 1:
The patent merges the patch and common electrode onto the same side of the second substrate, forming both elements on a single substrate surface. This consolidation eliminates the need for separate substrate layers, reducing the overall number of layers and interfaces, thereby simplifying the structural design while simultaneously improving substrate reliability by reducing crack propagation paths and dielectric loss interfaces.
Solution Approach 2:
The patent transitions from a three-dimensional stacked configuration (patch on one substrate, common electrode on another) to a two-dimensional planar configuration (both patch and common electrode on the same substrate surface). This dimensional change reduces the number of substrate layers required, simplifying the overall structure while minimizing dielectric loss and improving reliability.
2Ease of manufacture
If the patch and common electrode are formed on opposite sides of the second substrate, then the manufacturing process is easier, but dielectric loss of electromagnetic waves increases
Solution Approach 1:
The patent combines the formation of the patch and common electrode into a single manufacturing process step on the same substrate, eliminating the need for separate substrate preparation and assembly steps. This merging simplifies the manufacturing process while reducing dielectric loss by eliminating additional dielectric layers and interfaces that would otherwise be present in a multi-substrate configuration.
Solution Approach 2:
The patent extracts the common electrode from the opposite side of the substrate and repositions it on the same side as the patch. This extraction and repositioning eliminates the need for thick dielectric layers between opposite sides, thereby reducing dielectric loss while maintaining ease of manufacture through a streamlined single-side fabrication process.
3Adaptability or versatility
If multiple layers and substrates are used, then the device functionality is more complete, but the risk of substrate deterioration and cracks increases
Solution Approach 1:
The patent merges multiple functional elements (patch and common electrode) onto a single substrate, reducing the total number of substrate layers from two to one. This consolidation maintains complete device functionality while significantly reducing substrate deterioration risk by eliminating interfaces between multiple substrates, where cracks typically initiate and propagate.
Solution Approach 2:
The patent segments the device functionality into distinct functional layers (conductive layers, dielectric layers, liquid crystal layer) within a single substrate structure, rather than distributing functions across multiple substrates. This segmentation allows each function to be optimized independently while maintaining substrate integrity, as all critical elements are integrated within one continuous substrate.
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
This configuration enhances the operational reliability and reduces dielectric loss of electromagnetic waves, improving the overall performance of the electronic device.
Implementation Method 1
a liquid-crystal layer disposed between the plurality of phase shifters and the common electrode layer
Implementation Method 2
the plurality of phase shifters disposed on the first substrate... the liquid-crystal layer disposed between the plurality of phase shifters and the common electrode layer
Data Source
AI summary
An electronic device is provided, including: a first substrate, a plurality of phase shifters, a second substrate, a plurality of patches, a common electrode layer, a dielectric layer, and a liquid-crystal layer. The plurality of phase shifters are disposed on the first substrate. The second substrate has an inner side facing the first substrate. The plurality of patches are disposed on the inner side of the second substrate. The dielectric layer is disposed between the common electrode layer and the second substrate and on the plurality of patches. The liquid-crystal layer is disposed between the plurality of phase shifters and the common electrode layer.