Phased Array Antenna with Non-Contact Reflector Tuning
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Solution Overview
Problem
Existing phased array antennas face challenges in being simply and effectively tuned, especially in weight and space-constrained environments, while also requiring robust and reliable tuning mechanisms capable of operating in harsh conditions.
Innovation Solution
A phased array antenna design featuring an array of reflective cells with moveable reflectors that do not contact the cell walls, allowing for independent tuning and reduced friction, along with a feed and subreflector arrangement for dual polarized signal handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If contact-based tuning mechanisms are used in phased array antennas, then structural support is provided, but friction increases and reliability decreases
Solution Approach 1:
The patent replaces traditional mechanical contact-based tuning mechanisms with a dielectric resonator system that is moved by actuators but does not contact the waveguide walls. The dielectric material interacts with electromagnetic fields rather than requiring physical contact for support, eliminating friction and improving reliability while reducing power consumption.
2Volume of moving object
If compact antenna structures are implemented, then space efficiency improves, but heat dissipation becomes more difficult
Solution Approach 1:
The patent employs dielectric materials with specific permittivity properties that allow for compact resonator designs. These materials enable the antenna to maintain compact volume while the dielectric structure itself provides thermal pathways for heat dissipation, resolving the conflict between compactness and thermal management.
3Ease of manufacture
If material selection is restricted for waveguide construction, then manufacturing simplicity is maintained, but antenna performance is limited
Solution Approach 1:
The patent introduces dielectric materials as a separate functional component within the waveguide structure. This allows the waveguide itself to be manufactured from conventional materials while the dielectric resonators provide enhanced electromagnetic performance. The composite approach enables optimization of each component for its specific function, improving overall antenna performance without complicating waveguide manufacturing.
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 provides a compact, robust, and reliable phased array antenna capable of full duplex operation with reduced power and weight requirements, while maintaining improved antenna performance and flexibility in material selection.
Implementation Method 1
each cell being defined by a wall positioned within the array the wall arranged to define a waveguide, and having a moveable reflector positioned within the wall, each reflector arranged such that it is not in electrical contact with its respective wall
Implementation Method 2
a feed and subreflector positioned within the array and arranged to transmit and/or receive electromagnetic signals to and/or from the array
Data Source
AI summary
A phased array antenna comprises an array of reflective cells, each cell being defined by a wall positioned within the array the wall arranged to define a waveguide, and having a moveable reflector positioned within the wall. Each reflector is arranged such that it is not in electrical contact with its respective wall and such that, in use it can be moved to tune the antenna. A feed and subreflector are positioned within the array and arranged to transmit and/or receive electromagnetic signals to and/or from the array.