Reconfigurable Dielectric Waveguide Antenna Beam Steering
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Solution Overview
Problem
Existing directional beam antennas are complex, costly, and cumbersome due to the need for motorized mechanisms and multiple phase shifters, making them inefficient for precise directional transmission and reception of millimeter wavelength radiation.
Innovation Solution
A reconfigurable directional antenna with a metal antenna element featuring a selectively variable evanescent coupling edge, controlled by an array of switches, allowing for precise adjustment of electromagnetic coupling geometry to direct electromagnetic radiation in desired directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a motor and transmission mechanism are used to rotate the drum for directional control, then the radiation direction can be precisely controlled, but the weight, size, cost and complexity of the antenna system increase
Solution Approach 1:
The patent replaces the mechanical rotation system (motor, transmission, rotating drum) with an electronic control system. The drum surface is divided into multiple zones that can be independently activated or deactivated electronically, allowing directional control without physical rotation. This substitution eliminates the need for motors and transmission mechanisms while maintaining directional control capability.
Solution Approach 2:
The patent creates a dynamically reconfigurable antenna surface where the effective radiating area can be changed in real-time by selectively activating different zones on the drum surface. This allows the antenna to adapt its radiation pattern electronically without mechanical movement, achieving dynamic directional control through electronic switching rather than mechanical rotation.
2Ease of operation
If multiple individual antenna elements with phase shifters are used (phased array), then directional beam steering is achieved, but the cost increases significantly
Solution Approach 1:
The patent merges multiple antenna elements into a single continuous drum-shaped radiating surface. Instead of using separate antenna elements each requiring individual phase shifters, the invention combines them into one integrated structure where directional control is achieved by selectively activating different zones, thereby eliminating the need for multiple expensive phase shifter components.
Solution Approach 2:
The single drum-shaped antenna surface serves multiple functions: it acts as both the radiating element and the beam steering mechanism. By selectively activating different zones on the same continuous surface, the antenna can steer beams in different directions without requiring separate antenna elements or phase shifters for each direction, achieving multi-functionality in a single structure.
3Adaptability or versatility
If a rotating drum mechanism is used for directional control, then beam direction is adjustable, but the weight and size of the antenna system increase
Solution Approach 1:
The patent replaces the heavy mechanical rotation system with a lightweight electronic control system. The drum itself does not need to rotate; instead, electronic switching controls which zones are active, achieving directional control without the weight of motors, transmissions, and rotating mechanical components.
Solution Approach 2:
The patent extracts and removes the heavy mechanical rotation subsystem from the antenna system. Only the essential drum-shaped radiating surface remains, which is much lighter than a complete rotating mechanism including motors and transmissions. The directional control function is extracted and implemented through electronic zone activation rather than mechanical rotation.
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 solution enables a compact, economical, and reliable antenna capable of transmitting and receiving electromagnetic radiation in selectable directions and shapes, improving manufacturing simplicity and operational efficiency.
Implementation Method 1
evanescent coupling between the transmission line and the antenna plate or layer when an electromagnetic signal is transmitted through the transmission line
Data Source
Figure 1~3B
Figure 4A~6B
Figure 7A~7B
AI summary
A reconfigurable directional antenna for transmission and reception of electromagnetic radiation includes a transmission line aligned with and adjacent to a metal antenna element with an evanescent coupling edge having a selectively variable electromagnetic coupling geometry. The shape and direction of the beam are determined by the selected coupling geometry of the coupling edge, as determined by the pattern of electrical connections selected for physical edge features of the coupling edge. The electrical connections between the edge features are selected by the selective actuation of an array of "on-off" switches that close and open electrical connections between individual edge features. The selection of the "on" or "off" state of the individual switches thus changes the electromagnetic geometry of the coupling edge, and, therefore the direction and shape of the transmitted or received beam. The actuation of the switches may be accomplished under the control of an appropriately-programmed computer.