SIW Antenna Metal Wall Layout for High Gain and Tight Array Spacing
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Solution Overview
Problem
Existing antennas face a contradictory challenge in achieving both improved antenna gain and reduced antenna interval, which is difficult to realize in next-generation communication systems like Beyond 5G/6G, especially in sub-terahertz band applications where beam control and amplifier integration are required.
Innovation Solution
A substrate integrated waveguide antenna design with a metal wall disposed at a specific distance from the interface between the substrate integrated waveguide and radiator, optimizing the width and position of the metal wall to enhance antenna gain while reducing the antenna interval.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an SIW horn is used to improve antenna gain, then the antenna gain is improved, but the antenna interval increases
Solution Approach 1:
The patent extracts and removes the SIW horn component from the antenna structure. By eliminating the horn while optimizing the metal wall position and radiator configuration, the invention achieves improved antenna gain without the additional length that a horn would introduce, thereby resolving the contradiction between gain improvement and interval increase
Solution Approach 2:
The patent transitions from a traditional horn-based three-dimensional structure to a planar substrate integrated waveguide structure. By changing the dimensional approach and using a flat substrate with strategically positioned metal walls and radiators, the invention achieves gain improvement without extending the antenna interval in the vertical dimension
2Length of moving object
If the metal wall is positioned closer to the interface to reduce antenna interval, then the antenna interval is reduced, but the antenna gain decreases
Solution Approach 1:
The patent optimizes specific parameters including the metal wall position (set at 0.6λ to 0.8λ from the interface), the width of the metal wall (0.1λ to 0.3λ), and the radiator configuration. These parameter optimizations enable the metal wall to be positioned at a distance that reduces the antenna interval while maintaining or improving antenna gain through resonant enhancement
3Device complexity
If a traditional planar antenna is used, then the structure is simple, but the amplifier and antenna cannot be mounted in one-to-one correspondence
Solution Approach 1:
The patent merges the amplifier mounting surface with the antenna radiation surface by placing both on the same substrate. The substrate serves dual functions as both the amplifier mounting platform and the antenna structure base, enabling direct one-to-one correspondence between amplifiers and antennas while maintaining structural simplicity
Solution Approach 2:
The substrate is designed to serve multiple functions simultaneously: it acts as the mounting surface for amplifiers, the structural base for the antenna, and the radiating element itself through the integrated metal wall and radiator configuration. This multi-functionality enables both simple structure and easy one-to-one mounting
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 improved antenna gain and allows for narrower antenna spacing, enabling effective beam control and arraying without the need for an SIW horn, thus supporting next-generation communication systems.
Implementation Method 1
a substrate integrated waveguide and a radiator including a plurality of metal strips
Implementation Method 2
a metal wall disposed at a second position with a second distance longer than a first distance in a direction toward the substrate integrated waveguide from a first position
Data Source
AI summary
A substrate integrated waveguide antenna includes, a substrate integrated waveguide, a radiator including a plurality of metal strips, and a metal wall, wherein the substrate integrated waveguide and the radiator are connected on a dielectric substrate, and the metal wall is disposed at a second position with a second distance longer than a first distance in a direction toward the substrate integrated waveguide from a first position, the first position being a position with the first distance in a direction from an interface at which the substrate integrated waveguide and the radiator are connected toward the radiator.