Compact Coupled Multi-Band Antenna Layout for UAV Integration
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Solution Overview
Problem
Existing multi-band antennas with complex structures are difficult to integrate into small devices like unmanned aerial vehicles due to size and structural constraints, particularly when multiple frequency bands are close together.
Innovation Solution
A compact antenna design featuring a substrate with three radiation portions, each corresponding to a different frequency band, where the second and third radiators are closely spaced and coupled to enhance signal coverage for low and medium frequency bands, while the third radiation portion is symmetrically distributed for high frequency bands, with feed lines providing grounding and feed points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a complicated structural design is used to meet multi-frequency-band requirements, then the antenna can cover multiple frequency bands, but the structure becomes complex and difficult to apply to small products
Solution Approach 1:
The patent combines multiple radiating elements (first radiating element, second radiating element, third radiating element) into a single integrated antenna structure. These elements are arranged in specific spatial relationships and share common feeding networks, allowing the antenna to cover multiple frequency bands (including close frequency bands) while maintaining a compact and relatively simple overall structure suitable for small products like drones and remote controllers.
Solution Approach 2:
The patent utilizes three-dimensional spatial arrangement of radiating elements, including elements extending in different directions (e.g., first radiating element extending in first direction, second radiating element extending in second direction). This dimensional approach allows multiple frequency bands to be covered by exploiting spatial relationships rather than requiring complex planar structures, thereby achieving multi-band coverage with reduced structural complexity.
2Adaptability or versatility
If the frequencies of multiple antenna frequency bands are relatively close, then multi-frequency coverage is achieved, but a complicated structural design is required
Solution Approach 1:
The patent assigns different local characteristics to different radiating elements to optimize performance at specific frequency bands. For example, the first radiating element, second radiating element, and third radiating element have different geometries, orientations, and coupling relationships, allowing each to be optimized for specific frequency ranges while working together to cover close frequency bands without requiring a completely complex overall structure.
Solution Approach 2:
The patent introduces feeding networks and grounding structures as intermediary elements that mediate between the multiple radiating elements and the signal source. These intermediaries enable efficient coupling between closely spaced frequency bands by providing controlled impedance matching and isolation, thereby achieving close frequency-band coverage without requiring the radiating elements themselves to be overly complex.
3Volume of moving object
If a compact antenna design is used for small devices, then size requirements are met, but it is difficult to achieve multi-frequency-band coverage
Solution Approach 1:
The patent employs a nested arrangement where radiating elements are positioned in close proximity to each other in three-dimensional space, with some elements partially overlapping or surrounding others. This nesting allows multiple radiating elements (each contributing to different frequency bands) to be packed into a compact volume, achieving both small size and multi-frequency-band coverage simultaneously.
Solution Approach 2:
The patent utilizes the dynamic interaction and coupling between closely spaced radiating elements. By carefully designing the spacing and coupling between elements (e.g., first radiating element, second radiating element, third radiating element), the antenna achieves broadband and multi-frequency performance through mutual coupling effects, allowing compact dimensions while maintaining versatile frequency coverage.
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 effectively covers three frequency bands (978 MHz, 1.09 GHz, and 5.8 GHz) with improved signal coverage and directivity, suitable for small devices like unmanned aerial vehicles, meeting the requirements of reduced size and simplicity.
Implementation Method 1
An antenna is a key component for transmitting and receiving electromagnetic wave wireless signals
Implementation Method 2
the third radiator and the second radiator are arranged close to each other and have a proximate frequency and radiator arm effective length, so that the third radiator and the second radiator are coupled with each other
Data Source
AI summary
The present disclosure provides an antenna, a wireless signal processing device, and an unmanned aerial vehicle. The antenna includes: a substrate having a flat first surface; a first radiation portion disposed on the first surface of the substrate, the first radiation portion comprising a first radiator and a second radiator, and the second radiator being located behind the first radiator; and a second radiation portion disposed on the first surface of the substrate. The second radiation portion includes: a third radiator; and the third radiator being disposed proximate to the second radiator and having a proximate frequency and radiator arm effective length to couple the third radiator with the second radiator. The antenna adopts reasonable wiring and structural design and can be implemented on a base material with a small volume.