Multiband Reflector Antenna for Consistent Tri-Band Beamwidth
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional wide beam multiband antennas have poor performance in terms of consistent beamwidth, gain, and front-to-back ratio, and are often complex, expensive, and difficult to fabricate, especially when designed for tri-band operation in 2.4GHz, 5GHz, and 6GHz bands.
Innovation Solution
A multiband antenna design featuring a radome with a chamber containing a multiband antenna element and a reflector, including high and low band radiating arms, and a reflector with specific panels and sidewalls to harmonize radiation patterns across multiple bands, providing a wide azimuth beamwidth and improved front-to-back ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional antenna structures are used to achieve wide beamwidth and high back to front ratio, then the beamwidth consistency across triband is improved, but the antenna structure becomes complicated, expensive, and difficult to fabricate with large overall size
Solution Approach 1:
The antenna structure is segmented into distinct functional components: a reflector assembly with specific geometric shapes, a multiband antenna element, and a radome. This segmentation allows each component to be optimized independently for its specific function while maintaining overall performance consistency across triband frequencies.
Solution Approach 2:
The antenna design uses a universal multiband antenna element that operates across 2.4GHz, 5GHz, and 6GHz bands simultaneously. The reflector assembly serves multiple functions including signal reflection, beam shaping, and impedance matching across all three frequency bands, reducing the need for separate structures for each band.
2Manufacturing precision
If conventional antenna structures are used to achieve wide beamwidth and high back to front ratio, then the beamwidth consistency across triband is improved, but the fabrication difficulty increases and overall size becomes large
Solution Approach 1:
The radome is designed as a thin-walled enclosure that houses the antenna elements and reflector. This thin-film approach simplifies manufacturing compared to rigid complex structures, while still providing necessary mechanical support and electromagnetic shielding. The radome can be molded as a single piece or assembled from simple sections.
Solution Approach 2:
Instead of trying to achieve wide beamwidth through complex antenna element designs, the invention inverts the approach by using a simple multiband antenna element combined with a geometrically-shaped reflector assembly to control the radiation pattern. This reverses the conventional design philosophy and simplifies fabrication.
3Adaptability or versatility
If directional antenna design is used for better range and capacity, then the beamwidth needs to be similar across triband, but the antenna structure becomes complicated and expensive
Solution Approach 1:
The reflector assembly uses specific geometric parameters (angles, dimensions, and shapes) that are optimized to maintain consistent beamwidth across the 2.4GHz, 5GHz, and 6GHz bands. By carefully controlling these geometric parameters, the design achieves triband adaptability without requiring complex reconfigurable structures.
Solution Approach 2:
The invention merges the functions of multiple band-specific antenna structures into a single multiband antenna element combined with a universal reflector assembly. This consolidation achieves triband operation with a simplified structure compared to having separate directional antennas for each frequency band.
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 a consistent beamwidth, high gain, and improved front-to-back ratio across the tri-band frequency range, while maintaining a compact size suitable for confined spaces, enhancing performance and reducing fabrication complexity.
Implementation Method 1
The reflector includes a main reflector panel, a front reflector wing forward of the main reflector panel, a rear reflector wing rearward of the main reflector panel
Data Source
Figure 1~3
Figure 4~5
Figure 6~8
AI summary
An antenna assembly includes a multiband antenna element and a reflector spaced from the antenna element and facing the antenna element. The multiband antenna element includes a high band antenna with high band radiating arms and a low band antenna with low band radiating arms. The reflector includes a main reflector panel, front and rear reflector wings, main sidewalls on opposite sides of the main reflector panel, front and rear sidewalls on opposite sides of the front and rear reflector wings, and forward and rearward inner walls at the interfaces of the main reflector panel and the front and rear reflector wings. An antenna includes a radome having walls at a top, bottom, front, rear, first side, and second side forming a chamber that receives the antenna assembly.