Antenna Device With Low-K Dielectric Layer for Millimeter Wave Gain
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Solution Overview
Problem
The use of glass for the back surface of a terminal device in millimeter waveband antennas leads to deteriorated radiation gain, increasing manufacturing costs due to the need for thicker glass in radiated portions.
Innovation Solution
Incorporating a dielectric with a lower relative dielectric constant between the antenna and a high dielectric constant member, such as glass, to improve radiation gain while maintaining cost-effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the thickness of glass is increased to improve radiation gain, then the radiation gain of the antenna is improved, but the manufacturing cost of the glass and terminal device increases
Solution Approach 1:
A dielectric member with lower dielectric constant than glass is introduced as an intermediary between the antenna and the glass back surface. This intermediate layer modifies the electromagnetic field distribution and reduces the detrimental effect of glass on radiation gain, allowing thin glass to be used without sacrificing antenna performance, thus resolving the contradiction between maintaining radiation gain and reducing manufacturing cost.
Solution Approach 2:
The patent changes the dielectric constant parameter by introducing a material with lower dielectric constant between the antenna and glass. This parameter modification alters the electromagnetic characteristics of the antenna-glass interface, enabling improved radiation gain while maintaining thin glass thickness, thereby solving the contradiction between radiation gain and manufacturing cost.
2Reliability
If the thickness of glass is increased to improve radiation gain, then the radiation gain of the antenna is improved, but the terminal device becomes thicker
Solution Approach 1:
The dielectric member acts as an intermediary that compensates for the thin glass thickness. By placing this low-dielectric-constant material between the antenna and glass, the system achieves improved radiation gain without increasing the overall device thickness, as the dielectric layer is thin yet effective in modifying electromagnetic field distribution.
Solution Approach 2:
By changing the dielectric constant parameter of the intermediate layer, the patent enables thin glass construction while maintaining radiation gain. This parameter modification allows the antenna to perform optimally with thin glass, avoiding the need to increase device thickness.
3Reliability
If a dielectric with lower relative dielectric constant is introduced between the antenna and glass, then the radiation gain is improved, but the device complexity increases
Solution Approach 1:
The dielectric member serves multiple functions: it improves radiation gain by modifying electromagnetic field distribution, allows the use of thin glass for aesthetic purposes, and can be integrated into existing antenna structures. This multi-functionality justifies the added component by providing multiple benefits simultaneously, thereby resolving the contradiction between improved radiation gain and increased device complexity.
Solution Approach 2:
The patent creates a composite structure combining the dielectric member with glass and antenna elements. This composite approach allows each material to contribute its specific properties: the dielectric member improves radiation characteristics, while glass provides aesthetic and protective functions. The composite structure achieves superior overall performance despite the additional component.
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
Enhances radiation gain and reduces manufacturing costs by optimizing antenna performance without thickening the glass components.
Implementation Method 1
a dielectric having a second relative dielectric constant smaller than the first relative dielectric constant and disposed between the antenna and the first member
Data Source
Figure 1
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AI summary
An antenna device of the present disclosure includes a housing, an antenna, and a dielectric. The housing has a first surface at least a part of which is formed of a first member having a first relative dielectric constant. The antenna is disposed inside the housing so as to radiate a radio wave in a millimeter waveband or more from the first member. The dielectric has a second relative dielectric constant smaller than the first relative dielectric constant and is disposed between the antenna and the first member.