CPW to Parallel Transmission Line Conversion via Angled 3D Structure
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Solution Overview
Problem
Existing techniques fail to effectively connect a coplanar waveguide (CPW) to a parallel transmission line, leading to high insertion loss and return loss, and occupy large space due to unstable adhesion and inefficient signal transmission.
Innovation Solution
A transmission line conversion apparatus that connects a CPW to a parallel transmission line by forming a CPW with a metal layer on a substrate, where a portion of the metal layer is removed to distinguish the signal and ground lines, and the parallel transmission line is connected at a set angle, allowing for balanced and stable signal transmission with minimal insertion loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a CPW is connected to a microstrip using conventional techniques, then the ground line area becomes large, but this occupies large space and causes unstable adhesion
Solution Approach 1:
The patent transitions from a planar microstrip connection to a three-dimensional parallel transmission line structure that extends at an angle from the substrate. This dimensional change allows the ground lines to be positioned more efficiently in space, reducing the occupied area while maintaining stable adhesion through proper structural design.
Solution Approach 2:
The patent employs asymmetric positioning of the parallel transmission line at a specific angle relative to the substrate rather than using symmetric orthogonal connections. This asymmetric configuration optimizes the ground line arrangement to reduce area occupation while ensuring stable mechanical and electrical adhesion between the CPW and parallel transmission line.
2Loss of energy
If conventional connection structures are used between CPW and microstrip, then the ground line area is large, but insertion loss and return loss increase
Solution Approach 1:
By transitioning to a three-dimensional parallel transmission line structure at an angle from the substrate, the patent reduces ground line area while minimizing signal reflections and energy loss. The angled configuration optimizes electromagnetic field distribution, reducing insertion loss and return loss compared to conventional planar connections.
3Adaptability or versatility
If a parallel transmission line is connected at an angle from the substrate, then wideband transmission is achieved, but the connection complexity increases
Solution Approach 1:
The patent implements a parallel transmission line connected at a specific angle from the substrate, creating a three-dimensional structure that enables wideband transmission. While this adds spatial complexity, the structured angular arrangement provides systematic advantages in bandwidth performance and signal transmission characteristics.
Data Source
AI summary
A transmission line conversion apparatus connecting a parallel transmission line to a coplanar waveguide (CPW) is provided. To this end, the CPW including a transmission line composed of a signal line and a ground line which is formed on one surface of a dielectric substrate, and a parallel transmission line connected to the CPW, at a predetermined angle with respect to a substrate constituting the CPW, and composed of a signal line and a ground line, are proposed. In addition, the signal line of the CPW and the signal line of the parallel transmission line are connected to each other, and the ground line of the CPW and the ground line of the parallel transmission line are connected to each other. As such, by connecting the CPW to the parallel transmission line, a return loss can be minimized.