Waveguide Microstrip Converter Slot Impedance Matching
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Solution Overview
Problem
Waveguide microstrip line converters face challenges in achieving stable high electric performance and reliability due to issues with power transmission and impedance matching between waveguides and microstrip lines.
Innovation Solution
A waveguide microstrip line converter design featuring a dielectric substrate with a ground conductor and a line conductor, including impedance transforming units and an H-shaped slot for efficient power exchange and impedance matching, eliminating the need for through holes and simplifying manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If through holes are used to electrically connect the ground conductor and conductor plate, then electrical connection is achieved, but manufacturing complexity and reliability are worsened due to embedding difficulties and potential connection failures
Solution Approach 1:
The invention removes the through holes from the structure entirely. Instead of embedding conductive structures through the dielectric substrate, the ground conductor and conductor plate are electrically connected through the slot structure and electromagnetic field coupling, eliminating the manufacturing complexity and reliability issues associated with through hole embedding
Solution Approach 2:
The slot acts as an intermediary structure that enables electrical connection between the ground conductor and conductor plate without physical through holes. The slot structure with its specific geometry provides the necessary electromagnetic coupling and field distribution to achieve electrical connection through field interaction rather than direct conductive path
2Reliability
If conventional waveguide microstrip line converters are used, then signal transmission is achieved, but electric performance stability is worsened due to impedance mismatch and power loss
Solution Approach 1:
The invention applies local quality by creating specific geometric features at critical locations. The slot structure with its particular width, length, and positioning creates localized field distribution and impedance characteristics that optimize power transmission and reduce reflections, thereby improving electric performance stability and reducing power loss
Solution Approach 2:
The invention utilizes parameter changes by adjusting the slot dimensions (width, length, positioning) and conductor geometry to achieve optimal impedance matching. By varying these geometric parameters, the converter achieves better electric performance stability and reduced power loss across the operating frequency range
3Reliability
If standard converter design is used, then basic conversion function is achieved, but device size is worsened due to lack of miniaturization
Solution Approach 1:
The invention applies the nested doll principle by integrating multiple functions into a compact structure. The slot structure serves multiple purposes: electrical connection, impedance transformation, and field coupling, all within a reduced footprint. This allows the converter to maintain reliable conversion functionality while achieving miniaturization
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
The design stabilizes high electric performance, improves reliability, reduces power loss, and allows for miniaturization while maintaining efficient power transmission across a wide frequency band.
Implementation Method 1
third portions responsible for impedance matching between the first portions and the second portion. The third portions each include an impedance transforming unit that is a portion having a wider line width than the first portions
Implementation Method 2
The slot is formed in a region surrounded by an opening edge portion of the open end of the ground conductor
Data Source
AI summary
A waveguide microstrip line converter includes a dielectric substrate, a ground conductor, and a line conductor. The ground conductor is provided on a first surface of the dielectric substrate and is joined to an open end that is an end portion of the waveguide. The slot is formed in a region surrounded by an opening edge portion of the open end of the ground conductor. The line conductor is provided on a second surface of the dielectric substrate. The line conductor includes first portions that are the microstrip lines, a second portion located just above the slot, and third portions responsible for impedance matching between the first portions and the second portion. The third portions each include an impedance transforming unit that is a portion having a wider line width than the first portions.