Slot Antenna Orthogonal Feeding Waveguide Design
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Solution Overview
Problem
Existing slot array antennas face challenges in size reduction and uniform electromagnetic wave transmission due to discontinuities in the feeding waveguide, leading to breakdown of transmission mode patterns and limited size reduction.
Innovation Solution
A slot antenna design featuring a tubular electromagnetic wave radiation part with radiating slots and feeding slots, along with a power guiding part extending orthogonally to the feeding slots, allows for efficient electromagnetic wave propagation and size reduction by guiding power from the feeding part to the radiating part through a hollow space, with a bulged portion in the feeding part to enhance wave coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the feeding waveguide is simply coupled to the radiation waveguide in an orthogonal direction, then the structure is simple, but the feeding waveguide protrudes outside the width dimension of the radiation waveguide, limiting size reduction
Solution Approach 1:
The feeding waveguide is bent into an L-shape configuration, transitioning from a straight orthogonal coupling to a two-dimensional path that first extends in one direction then bends to couple with the radiation waveguide. This dimensional change allows the feeding waveguide to fit within the width dimension of the radiation waveguide while maintaining proper coupling, thereby achieving size reduction without excessive complexity.
Solution Approach 2:
The feeding waveguide incorporates a bent section with a specific curvature radius to achieve the L-shape configuration. This curvature allows the waveguide to navigate within the constrained space while maintaining continuous electromagnetic wave propagation, resolving the conflict between compact size and functional performance.
2Volume of moving object
If the feeding waveguide is bent into an L-shape to fit within the width dimension, then size reduction is achieved, but the discontinuous section causes ununiform feed characteristics and breakdown of transmission mode pattern
Solution Approach 1:
The bent section of the feeding waveguide is designed with specific dimensional parameters (width, height, curvature radius) that are optimized to maintain proper transmission mode patterns. By carefully controlling these geometric parameters, the waveguide can accommodate the L-shape configuration while preserving uniform electromagnetic wave propagation characteristics and avoiding mode breakdown.
Solution Approach 2:
The feeding waveguide is designed as a continuous structure without sharp discontinuities or gaps at the bent section. This continuity ensures that electromagnetic waves can propagate smoothly through the L-shaped path, maintaining uniform feed characteristics to all radiating slots and preventing transmission mode pattern breakdown despite the spatial reconfiguration.
3Volume of moving object
If the feeding waveguide section is contained within the width dimension of the radiation waveguide, then size reduction is achieved, but feed characteristics become ununiform particularly in width directions
Solution Approach 1:
The feeding waveguide is designed with non-uniform cross-sectional dimensions at different locations, particularly at the bent section. The width and height dimensions are locally optimized to compensate for the effects of the L-shape configuration, ensuring that electromagnetic wave propagation characteristics remain uniform across all radiating slots despite the compact packaging.
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 compact slot antennas with proper electromagnetic wave propagation, achieving size reduction while maintaining uniform transmission mode patterns and efficient power transfer within the radiation waveguide.
Implementation Method 1
a plurality of electromagnetic wave radiating slots for radiating electromagnetic waves
Implementation Method 2
a power guiding part having a hollow space and for guiding the power to the feeding part, the power guiding part extending in a direction orthogonal to the array direction of the feeding slots
Data Source
AI summary
This disclosure provides a slot antenna, which includes a tubular electromagnetic wave radiation part having a hollow space, a plurality of electromagnetic wave radiating slots for radiating electromagnetic waves being formed in at least a part of a side surface of the radiation part and a plurality of feeding slots for being inputted with the electromagnetic waves being arrayed in line in another part of the side surface opposing to the radiating slots, a feeding part having a hollow space, extending along the feeding slot array, and for feeding power from the outside of the radiation part to the feeding slots, and a power guiding part having a hollow space and for guiding the power to the feeding part, the power guiding part extending in a direction orthogonal to the array direction of the feeding slots and in parallel to the center axis of the radiation part, from a location of the feeding part corresponding to at least one of the feeding slots.