Superstrate Millimeter-Wave Phased-Array Antenna Architecture
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Solution Overview
Problem
Existing wireless antenna elements face challenges in achieving optimal performance due to the precision requirements of antenna geometry and substrate characteristics, which can be costly and result in larger physical footprints.
Innovation Solution
A wireless communications assembly featuring a primary board with antenna contacts and a superstrate board with a phased array of antenna elements, connected via a surface-mount package to provide a substrate between the antenna elements and the ground layer, allowing for efficient wireless data communications according to standards like IEEE 802.11ad.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If superior substrate materials and assembly configurations are used to improve antenna performance, then antenna performance characteristics are improved, but fabrication cost increases and physical footprint increases
Solution Approach 1:
The antenna system is divided into two separate boards: a primary board containing the radio controller and ground plane, and a superstrate board containing the antenna elements. This segmentation allows each board to be optimized independently, enabling the use of superior substrate materials only where critical for antenna performance while reducing overall fabrication costs.
Solution Approach 2:
The invention transitions from a traditional single-board antenna configuration to a multi-layer stacked configuration with the superstrate board positioned above the primary board. This dimensional change allows the antenna elements to be separated from the ground plane by a controlled distance, improving antenna performance characteristics while maintaining a compact form factor.
2Reliability
If superior substrate materials and assembly configurations are used to improve antenna performance, then antenna performance characteristics are improved, but physical footprint increases
Solution Approach 1:
By moving the antenna elements to a superstrate board positioned above the primary board, the invention utilizes the vertical dimension to achieve superior antenna performance without expanding the horizontal footprint. The stacked configuration maintains a compact form factor while improving performance characteristics.
Solution Approach 2:
The superstrate board with antenna elements is positioned within the vertical space above the primary board, creating a nested-like configuration where the antenna structure is contained within the overall device envelope without requiring additional horizontal space.
Data Source
AI summary
A wireless communications assembly includes: a primary board including: (i) an upper surface bearing a radio controller, and defining a set of control contacts for connection to respective ports of the radio controller; (ii) a lower surface opposite the upper surface, the lower surface defining a plurality of antenna contacts; (iii) a plurality of conduits extending through the primary board from the antenna contacts to the control contacts; and (iv) an antenna ground plane; a superstrate board including: (i) an inner surface facing the lower surface of the primary board; (ii) an outer surface opposite the inner surface; (iii) a phased array of antenna elements disposed on the inner surface; and a surface-mount package between the lower surface and the inner surface for connecting a subset of the antenna contacts directly to the antenna elements and to provide a substrate between the antenna elements and the antenna ground layer.