Waveguide Converter with Dielectric Substrate and Loop Pattern
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Solution Overview
Problem
Conventional converters for signal conversion between waveguides and planar circuits face limitations in miniaturization and suffer from unwanted radio wave emission due to the design requirements for preventing radio wave leakage.
Innovation Solution
A converter design featuring a dielectric substrate with a conductor pattern and ground conductor, where the conductor pattern includes an electrical opening that functions as a loop pattern, eliminating the need for a choke structure and allowing for miniaturization while preventing radio wave leakage without additional components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a loop conductor pattern is formed to surround the opening of the ground plate with width set to an odd multiple of a quarter wavelength, then radio wave leakage is prevented, but miniaturization is limited
Solution Approach 1:
The invention extracts the essential function of the loop conductor pattern (radio wave leakage prevention) and implements it through a simplified conductor pattern with an electrical opening, removing the need to surround the entire opening. This reduces the converter size while maintaining the leakage prevention function.
Solution Approach 2:
The invention applies local quality by positioning the conductor pattern with electrical opening at specific locations (immediately above the waveguide end) rather than surrounding the entire ground plate opening. This localized approach maintains effectiveness while reducing overall size.
2Volume of moving object
If the loop conductor pattern is removed for miniaturization, then converter size is reduced, but unwanted radio waves are emitted from the open end of the conductor pattern
Solution Approach 1:
The invention converts the potentially harmful open end of the conductor pattern into a beneficial feature by designing the electrical opening to function as an effective choke structure. The open end, which would normally emit unwanted radio waves, is configured to prevent leakage when positioned immediately above the waveguide end with the dielectric substrate interposed.
3Reliability
If a choke structure is used to prevent radio wave leakage, then leakage is prevented, but device complexity increases
Solution Approach 1:
The invention merges the conductor pattern with the choke function by configuring the conductor pattern to have an electrical opening that serves as an effective choke structure. This integration eliminates the need for separate choke components, reducing device complexity while maintaining leakage prevention.
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 achieves miniaturization and effective suppression of unwanted radio wave emission, improving upon existing converters by eliminating the need for a choke structure and reducing power loss through impedance matching.
Implementation Method 1
The slots are formed in an area covered with the one end of the waveguide in the ground conductor
Implementation Method 2
The dielectric substrate is coupled with one end of the waveguide on a back surface of the dielectric substrate
Implementation Method 3
the electrical opening is a loop pattern
Data Source
AI summary
A converter includes an electrical opening which is a loop pattern, at one end of a conductor pattern located immediately above one end of a waveguide with a dielectric substrate interposed therebetween.