Dielectric Waveguide Launching Sub-terahertz Signals
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Solution Overview
Problem
High-frequency signal transmission in electronic systems faces challenges due to signal radiation and interference, particularly at sub-terahertz frequencies, where conventional waveguides may act as antennas and suffer from electromagnetic interference and cross-talk issues, especially when using dielectric waveguides that are prone to interference from human touch or conductive objects.
Innovation Solution
The use of dielectric waveguides with a metallic cladding and tapered ends, interfaced with Vivaldi antennas on substrates, along with a flexible socket and plug design using deformable gap fillers to minimize impedance mismatch and radiation loss, allows for efficient signal launching and reception while maintaining mechanical alignment and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If dielectric waveguides are used for high-frequency signal transmission, then signal confinement and reduced radiation are achieved, but the waveguides become prone to interference from human touch or conductive objects
Solution Approach 1:
The waveguide structure combines dielectric material with metallic cladding to create a composite structure that maintains signal confinement benefits while adding electromagnetic shielding to protect against external interference from conductive objects and human touch
2Productivity
If conventional waveguides are used for sub-terahertz signal transmission, then signal transmission is achieved, but the waveguides act as antennas and suffer from electromagnetic interference and cross-talk issues
Solution Approach 1:
The dielectric-metallic composite structure confines electromagnetic signals more effectively, preventing them from radiating like conventional waveguides at sub-terahertz frequencies, thereby reducing electromagnetic interference and cross-talk between adjacent transmission paths
Solution Approach 2:
The thin metallic cladding layer acts as a shielding shell that contains the electromagnetic field within the dielectric core, preventing signal leakage and reducing interference with surrounding components
3Object-affected harmful factors
If dielectric waveguides with metallic cladding are used, then signal confinement and reduced interference are achieved, but manufacturing complexity increases
Solution Approach 1:
The metallic cladding thickness is optimized to be thin (sufficient for shielding but not excessive), and the dielectric material properties are selected to balance signal confinement with ease of fabrication, simplifying the overall manufacturing process while maintaining performance
4Loss of energy
If tapered ends are used in dielectric waveguides, then impedance mismatch and radiation loss are reduced, but manufacturing precision requirements increase
Solution Approach 1:
The taper angle and length are optimized to provide effective impedance transition while remaining within the capabilities of standard manufacturing processes, balancing performance improvement with manufacturing feasibility
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 effectively confines high-frequency signals within the waveguide, reducing radiation and interference, and provides a low-cost, flexible, and robust solution for sub-terahertz signal transmission with minimal insertion loss and cross-talk, suitable for long-distance communication in electronic systems.
Implementation Method 1
Propagation in a dielectric waveguide may be viewed in the same way, with the waves confined to the dielectric by total internal reflection at its surface
Implementation Method 2
a flexible socket and plug design using deformable gap fillers to minimize impedance mismatch and radiation loss
Data Source
AI summary
A system is provided for transmitting sub-terahertz electro-magnetic radio frequency (RF) signals using a dielectric waveguide (DWG) having a dielectric core member surrounded by dielectric cladding. An RF transmitter is coupled to an antenna located on a first substrate, in which the antenna is adjacent an edge of the substrate. The first substrate is mounted on a second substrate. A conductive reflector plate is formed on the top surface of the second substrate. An end of the DWG is mounted on the second substrate over the reflector plate such that an exposed face of the core member at the end of the DWG is adjacent the antenna. The core member at the end of DWG forms an angle of inclination with the second substrate in which the angle is in a range of approximately 10-30 degrees.