Waveguide Transition Circuit Layout for Low Radiation Loss
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Solution Overview
Problem
Transition circuits in communication devices face challenges in reducing radiation and conductor losses, particularly in high-frequency applications, where existing designs struggle to maintain low reflection and transmission coefficients while minimizing insertion loss.
Innovation Solution
The transition circuit design incorporates a waveguide with conductive layers and side portions, along with conductive portions and a transmission line, where the orientations of electric fields from these components are opposite, reducing radiation loss, and specific geometries and materials like copper, silver, and gold are used to enhance performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional transition circuit designs are used, then device simplicity is maintained, but radiation loss and conductor loss increase at high frequencies
Solution Approach 1:
The transition circuit is divided into multiple functional segments: a waveguide section with conductive layers and side portions, conductive portions with extending portions, and a transmission line section. This segmentation allows each part to be optimized for specific functions (waveguide for low radiation loss, transmission line for signal coupling), resolving the contradiction between reducing energy loss and maintaining structural simplicity.
Solution Approach 2:
The invention transitions from a planar transmission line structure to a three-dimensional waveguide structure with conductive layers stacked in the vertical direction. The first and second conductive layers are separated by a vertical distance, creating a layered configuration that reduces radiation loss while managing the increased structural complexity through systematic spatial arrangement.
2Loss of energy
If conventional transition circuit designs are used, then manufacturing simplicity is maintained, but insertion loss increases at high frequencies
Solution Approach 1:
Different sections of the transition circuit use different structural configurations optimized for their specific functions. The waveguide section uses a enclosed structure with conductive layers for low loss transmission, while the transmission line section uses an open structure for easy coupling. This local optimization reduces insertion loss in critical areas without requiring complete redesign of the entire circuit, balancing performance improvement with manufacturing feasibility.
3Object-affected harmful factors
If the waveguide structure with multiple conductive layers is used, then radiation loss is reduced, but the device complexity increases
Solution Approach 1:
The waveguide structure merges multiple conductive layers (first conductive layer, second conductive layer) with side portions and extending portions into a single integrated component. This consolidation reduces radiation loss by creating a more complete electromagnetic containment structure, while the merging process itself manages the complexity by combining multiple functions into unified structural elements rather than separate components.
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 results in a transition circuit that achieves low radiation loss and reflection, enabling efficient signal transmission with reduced conductor loss across a wide frequency range, specifically from 23 GHz to 36 GHz, supporting low reflection and low insertion loss.
Implementation Method 1
a waveguide including a first conductive layer, a second conductive layer, a first side portion, and a second side portion
Implementation Method 2
the orientations of electric fields from these components are opposite, reducing radiation loss
Implementation Method 3
a part of the second conductive layer is provided between the first conductive layer and at least a part of the signal line
Implementation Method 4
enabling efficient signal transmission with reduced conductor loss across a wide frequency range
Data Source
AI summary
According to one embodiment, a transition circuit includes a waveguide, first and second conductive portions, and a transmission line. The waveguide includes first and second conductive layers, and first and second side portions. A direction from the first conductive layer to the second conductive layer is along a first direction. A second direction from the first side portion to the second side portion crosses the first direction. The first conductive portion includes a first extending portion extending along the first direction. The second conductive portion includes a second extending portion extending along the first direction. The transmission line includes a signal line that includes a first line portion, a first connecting portion and a second connecting portion. The first connecting portion includes a first end portion and a first other end portion. The second connecting portion includes a second end portion and a second other end portion.