Microstrip-to-Waveguide Adaptor With Orthogonal Stub Holes
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Solution Overview
Problem
Existing adaptors for connecting microstrip lines and waveguides face difficulties in joining multiple substrates and implementing microstrip lines in multiple layers, limiting their versatility and signal coupling efficiency.
Innovation Solution
The proposed adaptor features a microstrip line part with a microstrip port and patch pattern on a substrate, a waveguide part with a waveguide hole, channel hole, and stub hole, allowing for orthogonal connections and enabling the use of multi-layer structures, with the waveguide part joined only to the upper portion of the microstrip line part, facilitating signal transfer and allowing additional substrate layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a termination member is joined to the lower portion of the microstrip line part, then signal coupling between microstrip line and waveguide is achieved, but joining another substrate onto the microstrip line part becomes difficult
Solution Approach 1:
The invention extracts the signal coupling function from the termination member and relocates it to the waveguide part through the stub hole. This allows the microstrip line part to be free from the termination member, enabling another substrate to be joined onto its lower portion while maintaining signal coupling functionality through the waveguide structure.
2Reliability
If the waveguide part is joined to both upper and lower portions of the microstrip line part, then signal transfer is achieved, but implementing multi-layer structures becomes difficult
Solution Approach 1:
The invention segments the connection function by separating the waveguide part into distinct components: the waveguide hole for signal transfer and the stub hole for coupling. This segmentation allows the waveguide part to be joined only to the upper portion of the microstrip line part, freeing the lower portion for additional substrate layers while maintaining effective signal transfer through the structured hole arrangement.
3Ease of manufacture
If the microstrip line part is implemented as a single layer, then manufacturing is simplified, but adaptability to multi-layer configurations is limited
Solution Approach 1:
The invention creates a universal adaptor design where the waveguide part with its structured holes can serve multiple functions: signal transfer, impedance matching, and enabling multi-layer configurations. The standardized waveguide part design allows it to work with single-layer or multi-layer microstrip line parts, providing versatility while maintaining ease of manufacture through modular construction.
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 design enables efficient signal transfer between microstrip lines and waveguides, supports multi-layer structures, and allows for various substrate configurations, enhancing the adaptability and functionality of the adaptor.
Implementation Method 1
The stub hole may have a length that is a quarter (1/4) of the wavelength corresponding to the operating frequency
Data Source
AI summary
An adaptor for connecting a microstrip line and a waveguide is disclosed that includes a microstrip line part and a waveguide part. The microstrip line part includes a microstrip port pattern and a patch pattern on an upper portion of a substrate, where the patch pattern is joined to an end portion of the microstrip port pattern. The waveguide part includes a waveguide hole, for transferring a signal provided from the patch pattern; a channel hole, which is formed in an area for joining with the microstrip line part, is formed along a first direction orthogonal to a direction of the waveguide hole in correspondence to the microstrip port pattern, and is connected with the waveguide hole; and a stub hole, which is connected with the waveguide hole and is formed in an area for joining with the microstrip line part along a second direction opposite to the first direction.