Offset Feeding Segment for Semi-Circular Waveguide
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Solution Overview
Problem
The existing feeding apparatus for waveguides in wireless communication devices requires a large transverse area on printed circuit boards, leading to wasted space and increased manufacturing costs due to a symmetric, perpendicular transition design from microstrip lines to waveguides.
Innovation Solution
A feeding apparatus with a substrate and feeding segment that extends from a non-midpoint position on the waveguide's periphery, reducing the transverse area by altering the feeding direction and optimizing the layout to minimize unused space, while maintaining effective signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a microstrip line probe extends perpendicular to the diametric side of the waveguide in a symmetric design, then the signal transmission is stable and reliable, but the transverse area of the printed circuit board becomes large
Solution Approach 1:
The patent applies asymmetry by positioning the microstrip line probe to extend from a non-midpoint location on the waveguide's periphery. Specifically, the probe connects to the waveguide at a point that is offset from the center of the diametric side, creating an asymmetric layout that reduces the transverse area occupied by the printed circuit board while maintaining effective signal coupling into the waveguide.
Solution Approach 2:
The patent changes the feeding approach from a perpendicular extension in one dimension to an oblique extension that utilizes multiple dimensions. The microstrip line probe extends at an angle relative to the diametric side of the waveguide, effectively using both the radial and tangential dimensions to achieve compact layout while maintaining signal transmission performance.
2Ease of manufacture
If a symmetric perpendicular feeding design is used, then the transition from microstrip line to waveguide is simple to implement, but the layout area is large and creates unused blank regions
Solution Approach 1:
The patent implements asymmetry in the feeding structure by connecting the microstrip line probe to the waveguide at an offset position rather than at the midpoint. This asymmetric configuration allows the printed circuit board layout to be more compact and better utilized, reducing the transverse area while maintaining manufacturing feasibility through standard PCB fabrication processes.
3Device complexity
If the microstrip line probe extends perpendicular to the waveguide, then the feeding structure is straightforward, but the circuit density is low and manufacturing cost increases
Solution Approach 1:
The patent uses asymmetric positioning of the microstrip line probe connection point on the waveguide periphery to achieve compact layout. This allows surrounding circuit components to be more densely arranged around the feeding structure, improving circuit density and reducing the overall device footprint while maintaining structural simplicity.
Solution Approach 2:
By extending the microstrip line probe at an oblique angle rather than strictly perpendicular to the waveguide, the patent enables more efficient spatial arrangement of circuits in multiple dimensions, thereby increasing circuit density without significantly complicating the feeding structure.
Data Source
AI summary
A feeding apparatus is utilized for a waveguide. The waveguide includes an opening and a bottom periphery around the opening. The bottom periphery includes a feeding side. The feeding apparatus includes a substrate and a feeding segment. The substrate is connected to the bottom periphery of the waveguide. The feeding segment installed in the substrate is utilized for feeding a signal into the waveguide, which the feeding segment extends to the opening from a position of the feeding side different from midpoint of the feeding side.