Liquid Crystal Antenna Encapsulation for Easier Assembly Reliability

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Solution Overview

Problem

Existing liquid crystal antennas are difficult to prepare and lack reliability due to complex manufacturing processes and sensitivity to external environments.

Innovation Solution

A liquid crystal antenna design that includes a liquid crystal cell with a microstrip line, ground metal layer, and frame glue between substrates, along with additional substrates and radiation electrodes, which simplifies the manufacturing process and enhances reliability through encapsulation and phase shift performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional liquid crystal antenna manufacturing processes are used, then the antenna can be produced, but the preparation process is complex and reliability is poor

Engineering Contradiction:

Improveantenna reliabilityVSAvoidpreparation difficulty

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The antenna structure is divided into independent substrate modules (first substrate with ground metal layer, second substrate with microstrip line, third substrate with radiation electrode, fourth substrate) that can be manufactured separately and then assembled. This segmentation simplifies the manufacturing process for each component while improving overall reliability through modular construction.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Multiple substrates are combined and integrated into a single antenna system through precise alignment and connection structures. The merging of these separately manufactured substrates creates a reliable, functional antenna while maintaining the manufacturing simplicity benefits of modular production.

Inventive Principle:

Principle #5Merging (Combining)

2Reliability

If additional substrates and connection structures are added, then reliability and protection from external influences improve, but device complexity increases

Engineering Contradiction:

ImprovestabilityVSAvoidstructure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

Thin substrate layers are used to enclose and protect the liquid crystal layer and internal structures. These thin film substrates provide environmental protection and structural stability without adding significant complexity, as they serve multiple functions (protection, support, and integration) simultaneously.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The liquid crystal cell structure is nested within the multi-substrate assembly, with the liquid crystal layer positioned between the first and second substrates, which are themselves integrated into the larger four-substrate system. This nested arrangement protects internal components while maintaining a compact overall structure.

Inventive Principle:

Principle #7Nested doll (Nesting)

3Object-affected harmful factors

If frame glue and connection structures are used to enclose the liquid crystal layer, then protection from external environment improves, but manufacturing precision requirements increase

Engineering Contradiction:

Improveexternal environment influenceVSAvoidalignment precision

Core Design Contradiction:

Object-affected harmful factorsVSManufacturing precision

Solution Approach 1:

Frame glue is used as an intermediary material to bond the substrates together and enclose the liquid crystal layer. This mediator provides flexible alignment tolerance during assembly while maintaining structural integrity and environmental protection, reducing the stringency of precision requirements compared to rigid bonding methods.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The connection structure utilizes composite bonding approaches combining frame glue with substrate materials to achieve both environmental sealing and manufacturing feasibility. The composite nature of this bonding system accommodates variations in manufacturing precision while maintaining reliable enclosure and protection.

Inventive Principle:

Principle #40Composite materials

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 design simplifies the preparation process, reduces material loss and costs, and improves the reliability and stability of the liquid crystal antenna by protecting the microstrip line array structure from external influences.

Implementation Method 1

The liquid crystal phase shifter adjusts a phase of a radio frequency signal by controlling the deflection of liquid crystal molecules

Methodology Applied

Scientific EffectLiquid crystal phase shift: Liquid Crystals

Data Source

PatentUS11799197B2Liquid crystal antenna and preparation method thereof

Publication Date: 2023.10.24 CHENGDU TIANMA MICROELECTRONICS

AI summary

Provided are a liquid crystal antenna and a preparation method of the liquid crystal antenna. The liquid crystal antenna includes a liquid crystal cell and the liquid crystal cell includes a first substrate, a second substrate, a microstrip line, a ground metal layer, a liquid crystal layer, and frame glue. The liquid crystal antenna further includes a third substrate, a fourth substrate, and a radiation electrode. The third substrate extends beyond an edge of the first substrate. The fourth substrate extends beyond edges of the second substrate on at least two sides. A connection structure is disposed between the third substrate and the fourth substrate, and the connection structure is disposed on an outer side of the frame glue. The liquid crystal antenna and the preparation method of the liquid crystal antenna are provided to reduce preparation difficulty and improve reliability.