Nested Dual-Frequency Shared-Aperture Antenna Structure
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Solution Overview
Problem
Conventional dual-frequency antennas have a large footprint and restricted application scenarios due to the need for separate design and placement of receiving and transmitting antennas on a single aperture surface.
Innovation Solution
A dual-frequency shared-aperture antenna structure is designed, where low-frequency and high-frequency antennas are nested and arranged on the same metal layer, with specific geometric arrangements and metal hole configurations to optimize electrical spacing and reduce footprint.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If receiving and transmitting antennas are divided into two separate antennas and placed on one aperture surface, then the antennas can operate at different frequency bands, but the footprint becomes large and application scenarios are restricted
Solution Approach 1:
The patent implements nested arrangement where low-frequency antenna elements are positioned outside high-frequency antenna elements, with high-frequency elements nested within the aperture area defined by low-frequency elements. This nesting strategy allows both frequency bands to share the same aperture surface without requiring separate physical spaces, thereby reducing the overall footprint while maintaining dual-frequency operation capability and expanding application scenarios.
2Reliability
If receiving and transmitting antennas are designed as separate antennas, then they can be optimized for their respective frequency bands, but the structure becomes complex and the aperture utilization is low
Solution Approach 1:
The patent merges the receiving and transmitting antenna structures by implementing a shared aperture design where both antenna types coexist on the same aperture surface. The low-frequency antenna elements and high-frequency antenna elements are integrated into a unified structure with coordinated geometric parameters, allowing both frequency bands to be optimized for their respective operations while sharing common support structures and reducing overall system complexity.
Solution Approach 2:
The patent creates a universal antenna structure that serves multiple functions: the same aperture surface supports both low-frequency receiving elements and high-frequency transmitting elements. The geometric parameters of the antenna elements are designed to satisfy electrical spacing requirements for both frequency bands simultaneously, enabling the structure to perform multiple functions without requiring separate dedicated structures for each frequency band.
3Reliability
If antennas are placed on a larger aperture surface to accommodate both frequency bands, then frequency separation is achieved, but the aperture utilization efficiency decreases
Solution Approach 1:
The patent applies local quality optimization by positioning low-frequency antenna elements at specific locations outside the high-frequency element area, and placing high-frequency elements within the inner aperture region. The geometric parameters including element spacing and aperture dimensions are locally optimized to ensure that each frequency band operates with appropriate electrical spacing while maximizing the utilization of the overall aperture surface, thereby achieving frequency separation without sacrificing aperture efficiency.
Data Source
Figure 1~2
AI summary
The present disclosure, which relates to the field of antenna technology, provides a dual-frequency shared-aperture antenna structure and an antenna array. The dual-frequency shared-aperture antenna structure comprises: a first metal layer, a first dielectric layer, a second metal layer, a second dielectric layer and a third metal layer, the first metal layer, the first dielectric layer, the second metal layer, the second dielectric layer and the third metal layer being connected layer by layer, the second metal layer being grounded, and the first metal layer and the second metal layer being connected via a metal hole, wherein the first metal layer is provided with a plurality of penetrating slits to define a plurality of first high-frequency antennas and low-frequency antennas through the slits, the low-frequency antennas surrounding the first high-frequency antennas, and the low-frequency antennas having an operating frequency smaller than that of the first high-frequency antennas. The dual-frequency shared-aperture antenna structure and the antenna array provided in the present disclosure enjoy the advantages of a smaller footprint and a simple structure.