Cross-Loop UAV Antenna Layout for Omnidirectional Coverage
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Solution Overview
Problem
Existing remote controlled aerial vehicles face challenges with antennas that are either aesthetically displeasing, easily damaged, or occupy too much space, while also lacking a suitably omnidirectional radiation pattern, limiting communication range and reliability.
Innovation Solution
A cross loop antenna system is integrated within the aerial vehicle, comprising a cross bar antenna with intersecting antenna portions connected to a ground plane, forming two intersecting loops, which operate at a wavelength twice the length of the antenna portions, providing a dual-band omnidirectional radiation pattern.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an external whip antenna is used, then omnidirectional radiation pattern is achieved, but aesthetic appearance deteriorates and vulnerability to damage increases
Solution Approach 1:
The antenna is nested within the body of the aerial vehicle, specifically integrated into the housing structure. The antenna elements are positioned inside the vehicle body while extending through openings to maintain radiation functionality, thus protecting the antenna from damage while preserving omnidirectional coverage.
Solution Approach 2:
The antenna design transitions from a traditional external linear whip structure to a planar loop configuration integrated within the vehicle's housing. This dimensional reconfiguration allows the antenna to maintain radiation capabilities while being protected inside the vehicle body, eliminating the vulnerability of external protruding elements.
2Object-affected harmful factors
If internal antennas are used, then aesthetic appearance and protection are improved, but space consumption increases and radiation pattern performance deteriorates
Solution Approach 1:
The antenna system is divided into multiple discrete loop elements positioned at different locations within the vehicle housing. Each loop segment contributes to the overall radiation pattern, allowing the antenna to achieve omnidirectional coverage while efficiently utilizing the available internal space of the vehicle body.
Solution Approach 2:
The antenna configuration uses planar loop structures arranged in three-dimensional space within the vehicle housing. By utilizing vertical and horizontal dimensions within the housing volume, the design achieves effective radiation patterns without requiring excessive linear space, thus fitting within compact vehicle dimensions.
3Object-affected harmful factors
If internal antennas are used, then protection and aesthetics are improved, but omnidirectional radiation pattern performance deteriorates
Solution Approach 1:
The antenna employs non-uniform positioning and orientation of loop elements within the housing to compensate for the asymmetric electromagnetic environment created by the vehicle body. By strategically placing loops at different orientations and positions, the design achieves balanced omnidirectional radiation patterns despite the constrained internal geometry.
Solution Approach 2:
Multiple segmented loop elements are distributed throughout the vehicle housing to achieve omnidirectional coverage. Each segment radiates in specific directions, and the combined effect of properly positioned segments creates the desired omnidirectional pattern, overcoming the limitations of a single enclosed antenna element.
Data Source
AI summary
An antenna system of an unmanned aerial vehicle, the antenna system including a first loop antenna system, a second loop antenna system, and a feed line. The second loop antenna system is spaced apart from the first loop antenna system. The feed line extends between and connects the first loop antenna system and the second loop antenna system.