Transparent Flexible Antenna Assembly With Low-Heat RF Connection
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Solution Overview
Problem
Transparent flexible printed circuit boards (FPCBs) face challenges due to their unsuitability for high-temperature soldering processes and the need for new connection methodologies that are transparent, as traditional connections are not desirable with these antennas.
Innovation Solution
The implementation of transparent antennas with conductive artwork on flexible substrates, including specific configurations for different frequency bands, and a connector subassembly with a transparent substrate interface assembly and RF connector for signal communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional soldering processes are used to connect transparent FPCBs, then reliable electrical connection is achieved, but the transparent FPCB substrate cannot withstand the high temperature and is damaged
Solution Approach 1:
The connection system is divided into separate components: a transparent FPCB antenna element and a separate connector assembly. This segmentation allows the transparent FPCB to be connected without direct exposure to high-temperature soldering, as the connector can be attached separately at lower temperatures or through other connection methods.
Solution Approach 2:
A connector assembly serves as an intermediary between the transparent FPCB and the electrical connection system. This intermediary component absorbs the thermal stress of soldering, protecting the temperature-sensitive transparent FPCB substrate while enabling reliable electrical connections through the connector interface.
2Reliability
If traditional non-transparent connectors are used to connect transparent antennas, then reliable electrical connection is achieved, but the aesthetic transparency of the antenna is compromised
Solution Approach 1:
The connector assembly incorporates transparent or translucent materials that match the optical properties of the transparent FPCB. This allows the connector to maintain electrical reliability while remaining visually imperceptible or aesthetically integrated with the transparent antenna structure.
Solution Approach 2:
The transparency property is applied locally to the connector components that are visible through the transparent FPCB. Critical electrical connection elements can be opaque, while the portions visible through the transparent substrate are made transparent to maintain aesthetic appearance.
3Illumination intensity
If transparent FPCBs are used to maintain aesthetic appearance, then visual transparency is achieved, but the substrate material becomes unsuitable for high-temperature processing
Solution Approach 1:
The transparent FPCB system uses composite material structures where the transparent substrate is combined with temperature-resistant support structures or backing materials. This composite approach allows the transparent aesthetic surface to be protected from thermal stress while maintaining the desired optical properties.
Solution Approach 2:
Temperature-resistant support structures or thermal barriers are incorporated into the design beforehand, before the transparent FPCB is subjected to any thermal processing. This pre-protection allows the transparent substrate to be processed or connected without direct exposure to damaging temperatures.
Data Source
AI summary
A transparent antenna assembly and flexible transparent antenna. In one embodiment, the transparent antenna assembly includes a flexible transparent antenna having a transparent flexible substrate, the flexible transparent antenna being configured to operate according to a desired frequency band, the flexible transparent antenna including a portion that is configured to connect with a transparent substrate interface assembly; and a connector subassembly having a printed circuit board (PCB) mount connector, the PCB mount connector is configured to interface with the transparent flexible substrate via the transparent substrate interface assembly, the connector subassembly further including a radio frequency (RF) connector, the RF connector being in signal communication with the PCB mount connector.