Slot Antenna With Waveguide And Artificial Magnetic Conductor
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Solution Overview
Problem
High-frequency antenna systems face challenges with dielectric loss and size constraints, particularly when using microstrip lines, and existing waveguides like hollow waveguides are difficult to integrate for high-density antenna element placement.
Innovation Solution
A slot antenna design incorporating a waveguide member with an artificial magnetic conductor, featuring complex slots with vertical and lateral portions, allows for reduced size and high-density placement by utilizing stretches of artificial magnetic conductor on both sides of the waveguide member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a hollow waveguide is used to feed antenna elements, then dielectric loss is reduced and transmission efficiency is improved, but the device size increases and antenna element density decreases
Solution Approach 1:
The waveguide structure is segmented into multiple regions: a first waveguide region with first wall portions, a second waveguide region with second wall portions, and a third waveguide region with third wall portions. This segmentation allows each region to be optimized independently, reducing overall device size while maintaining low-loss transmission characteristics through strategic placement of radiating elements in different waveguide sections.
Solution Approach 2:
The patent implements nested waveguide structures where inner waveguide regions are positioned within outer waveguide regions. The first, second, and third wall portions create concentric or nested configurations that maximize space utilization, allowing multiple radiating elements to be densely packed while maintaining the hollow waveguide's low-loss properties.
2Loss of energy
If a hollow waveguide is used to feed antenna elements, then dielectric loss is reduced, but antenna element density decreases due to increased spacing requirements
Solution Approach 1:
By dividing the waveguide into multiple segmented regions with different wall configurations, the patent enables placement of multiple radiating elements at different positions and orientations within the same waveguide structure, thereby increasing antenna element density without compromising the low-loss transmission benefits.
Solution Approach 2:
The patent utilizes three-dimensional space within the hollow waveguide by positioning radiating elements not only along the waveguide length but also in radial and angular dimensions. This multi-dimensional arrangement allows higher antenna element density while maintaining the electromagnetic field characteristics that minimize dielectric loss.
3Reliability
If the waveguide body is made thick enough to support high-frequency waves, then structural integrity and wave propagation are improved, but device size and weight increase
Solution Approach 1:
Different wall portions (first, second, and third wall portions) are designed with locally optimized thicknesses and configurations tailored to their specific functional requirements. This allows the waveguide to maintain structural integrity and stable wave propagation in critical regions while minimizing material usage and weight in less critical areas.
Solution Approach 2:
The waveguide structure employs composite construction with multiple wall portions that may utilize different materials or material configurations optimized for their specific roles. This composite approach enables the waveguide to achieve necessary mechanical strength and electromagnetic performance with reduced overall weight compared to a uniformly thick waveguide.
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 achieves low loss and compact size, enabling efficient high-frequency electromagnetic wave transmission and reception while allowing for high-density antenna element placement, improving directivity and gain characteristics.
Implementation Method 1
In the interior of a hollow waveguide, an electromagnetic field mode which is adapted to the shape and size of the body is created. For this reason, an electromagnetic wave is able to propagate within the body in a certain electromagnetic field mode.
Implementation Method 2
The first electrically conductive member has one or more slots. At least one of the slot or slots is a complex slot having a pair of vertical portions and a lateral portion that interconnects the pair of vertical portions.
Data Source
AI summary
A slot antenna includes: a first electrically conductive member having a first electrically conductive surface; a second electrically conductive member having a second electrically conductive surface opposing the first electrically conductive surface; a waveguide member between the first electrically conductive member and the second electrically conductive member, the waveguide member having an electrically conductive waveguide face of a stripe shape opposing the first electrically conductive surface, the waveguide member extending in a first direction along the first electrically conductive surface; and an artificial magnetic conductor extending on both sides of the waveguide member, between the first electrically conductive member and the second electrically conductive member. The first electrically conductive member has one or more slots. At least one of the slot or slots is a complex slot having a pair of vertical portions and a lateral portion that interconnects the pair of vertical portions. The lateral portion of the complex slot opposes the waveguide face, and intersects the first direction.