Multiband Antenna Reflector Layout for Consistent Tri-Band Beamwidth
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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 2.4 GHz, 5 GHz, and 6 GHz bands.
Innovation Solution
A multiband antenna design featuring a radome with a chamber containing a multiband antenna element and a reflector system, including a main reflector panel, wings, sidewalls, and inner walls, designed to harmonize radiation patterns across multiple frequency bands, providing a wide azimuth beamwidth and improved front-to-back ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If conventional antenna structures are used to achieve wide beamwidth and high front-to-back ratio, then the beamwidth and front-to-back ratio are improved, but the overall size becomes large and the structure becomes complicated
Solution Approach 1:
The antenna structure is divided into multiple frequency-specific radiating elements (2.4GHz element, 5GHz element, 6GHz element) that can be independently optimized for their respective bands. This segmentation allows each element to achieve optimal beamwidth and front-to-back ratio characteristics without requiring a single complex structure to handle all frequencies, thereby reducing overall structural complexity while maintaining performance.
Solution Approach 2:
Different radiating elements are designed with locally optimized geometries and configurations tailored to their specific frequency bands. Each element has its own characteristic impedance, radiation pattern, and physical dimensions optimized for its operating frequency, allowing wide beamwidth and high front-to-back ratio to be achieved at each band without requiring a uniformly complex structure across the entire antenna system.
2Stability of the object's composition
If conventional antenna structures are designed for tri-band operation, then the beamwidth consistency across bands is improved, but the fabrication difficulty and cost increase
Solution Approach 1:
The tri-band antenna is segmented into three independent radiating elements, each designed and fabricated for a specific frequency band. This segmentation allows each element to be manufactured using optimized processes for its frequency range, avoiding the need to fabricate a single complex structure that must accommodate all three bands, thereby reducing overall fabrication difficulty and cost while maintaining beamwidth consistency across bands.
Solution Approach 2:
The antenna system employs a universal mounting structure and feed network design that can accommodate multiple frequency-specific radiating elements. This multi-functional platform allows different elements to be integrated using common manufacturing processes and assembly techniques, reducing fabrication complexity despite the need to maintain consistent beamwidth characteristics across all three frequency bands.
3Length of moving object
If directional antenna design is used for better range and capacity, then the range and capacity are improved, but the beamwidth consistency across triband deteriorates
Solution Approach 1:
The directional antenna system is segmented into multiple frequency-specific radiating elements, each optimized to provide directional coverage with consistent beamwidth characteristics for its designated frequency band. By segmenting the design, each element can achieve optimal directional performance without compromising beamwidth consistency across the triband spectrum, as each element operates independently at its optimized frequency.
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 and gain across tri-band frequencies with a high front-to-back ratio, while maintaining a compact size, 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
AI summary
An antenna includes a radome having walls at a top, bottom, front, rear, first side, and second side forming a chamber that receives an antenna assembly. The 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.