Triband Antenna Unit Cell With Nested Radiators for Low Interference
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Solution Overview
Problem
Conventional multiband antennas face challenges in minimizing size and wind loading while maintaining performance due to interference between radiators in different frequency bands, particularly between Mid-Band and C-Band radiators, leading to reduced gain and increased weight.
Innovation Solution
A unit cell design for multiband antennas with a reflector, first and second frequency dipoles, and third frequency radiators, allowing for adjacent placement of radiators without degrading performance by using cloaked dipoles and patch antenna elements with cavity cup frames to minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If radiators of different frequency bands are placed in close proximity to minimize antenna area, then antenna area and wind loading are reduced, but interference between radiators occurs degrading performance
Solution Approach 1:
The patent implements a nested vertical stacking configuration where Low Band, Mid Band, and C-Band radiators are arranged in overlapping vertical layers. Each frequency band's radiators are positioned at different heights, with Low Band at the lowest level, Mid Band in the middle, and C-Band at the highest level. This nesting approach allows all three frequency bands to occupy the same horizontal footprint while maintaining vertical separation, thereby minimizing antenna area while preventing mutual interference through adequate vertical spacing.
Solution Approach 2:
The patent transitions from conventional horizontal planar arrangements to a three-dimensional vertical stacking configuration. By exploiting the vertical dimension (elevation plane), the design places radiators of different frequency bands at different heights above the reflector surface. This dimensional change allows dense packing in the horizontal plane while maintaining performance through vertical separation, effectively resolving the area-performance contradiction.
2Reliability
If spacing between Mid-Band and C-Band arrays is increased to reduce interference, then performance is maintained, but antenna size and weight increase
Solution Approach 1:
The patent implements a nested vertical stacking configuration where Low Band, Mid Band, and C-Band radiators are arranged in overlapping vertical layers. Each frequency band's radiators are positioned at different heights, with Low Band at the lowest level, Mid Band in the middle, and C-Band at the highest level. This nesting approach allows all three frequency bands to occupy the same horizontal footprint while maintaining vertical separation, thereby minimizing antenna area while preventing mutual interference through adequate vertical spacing.
Solution Approach 2:
The patent transitions from conventional horizontal planar arrangements to a three-dimensional vertical stacking configuration. By exploiting the vertical dimension (elevation plane), the design places radiators of different frequency bands at different heights above the reflector surface. This dimensional change allows dense packing in the horizontal plane while maintaining performance through vertical separation, effectively resolving the area-performance contradiction.
Data Source
AI summary
A unit cell for an ultra-dense multiband antenna comprises a reflector; a first frequency dipole disposed on the reflector, the first frequency dipole having four first frequency dipole arms; a plurality of second frequency dipoles disposed on the reflector, each of second frequency dipoles having four second frequency dipole arms; and a plurality of third frequency radiators disposed on the reflector, each third frequency radiator having a patch antenna element that is disposed above the reflector and a cavity cup frame disposed below the reflector, wherein each of the first frequency dipole arms is disposed above a second frequency dipole, and wherein each of the second frequency dipole arms is disposed above a third frequency radiator.