Cross-Slot Antenna Module for Wide Circularly Polarized Coverage
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Solution Overview
Problem
Existing antennas face challenges in achieving a wide range of beam coverage while maintaining sufficient radiation intensity due to structural limitations, which affects communication performance, particularly in satellite communication where stable signal connection is required.
Innovation Solution
An antenna module with a metal plate and a metal body featuring crosswise arranged slots with transverse and longitudinal openings, excited by an excitation source to radiate circularly polarized waves, allowing for a wide beam coverage in a small size by adjusting the ratio of these openings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If traditional antenna structures are used, then the radiation intensity can be maintained, but the beam coverage range is limited
Solution Approach 1:
The antenna structure is divided into multiple slots (first slot and second slot) arranged crosswise on the metal body, with each slot having transverse and longitudinal openings. This segmentation allows independent optimization of different radiation directions, achieving wide beam coverage while maintaining radiation intensity through coordinated excitation of multiple slot segments
Solution Approach 2:
The patent introduces a third dimension by adding transverse openings penetrating through the metal body thickness direction, in addition to the longitudinal openings in the plane direction. This three-dimensional slot structure enables radiation in multiple directions simultaneously, expanding beam coverage from two-dimensional to three-dimensional space while maintaining intensity
2Volume of moving object
If the antenna size is reduced, then space utilization is improved, but the beam coverage and radiation intensity are compromised
Solution Approach 1:
By utilizing the thickness direction of the metal body to create transverse openings, the patent achieves three-dimensional radiation without increasing the planar footprint. This allows compact antenna size while maintaining wide beam coverage through vertical dimension exploitation
Solution Approach 2:
The patent optimizes the ratio between transverse opening length and longitudinal opening length to achieve desired radiation patterns. By adjusting these dimensional parameters, wide beam coverage is achieved in a compact size, resolving the contradiction between small volume and large coverage area
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 antenna module achieves high-performance communication by ensuring wide beam coverage and radiation intensity through the coordinated excitation of slots, optimizing space utilization and radiation patterns.
Implementation Method 1
The excitation source is configured to excite the first slot and the second slot to radiate a circularly polarized wave
Data Source
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AI summary
An antenna module includes a metal plate (1), a metal body (2) and an excitation source (3). The metal body (2) is provided on the metal plate (1), and includes a first slot (21) and a second slot (22) arranged crosswise and at a set angle. Each of the first slot (21) and the second slot (22) includes a transverse opening (23) penetrating through the metal body (2) along a thickness direction of the metal plate (1) and a longitudinal opening (24) penetrating through the metal body (2) along a plane direction of the metal plate (1), and a length of the transverse opening (23) and a length of the longitudinal opening (24) are in a set ratio. The excitation source (3) is configured to excite the first slot (21) and the second slot (22) to radiate a circularly polarized wave.