Multi-Element Reflector Antenna for Wide mmWave Beam Steering
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Solution Overview
Problem
Wireless communication networks face challenges in providing high-quality services at high frequencies due to significant path loss and shadowing effects, especially in millimeter-wave frequencies, where traditional solutions like high power transmission or directional beams are either impractical or too complex for widespread deployment.
Innovation Solution
A multi-element reflector antenna system with concave reflective surfaces, each with a common curvature and focal distance, steers radio-frequency beams in different directions, combined with a directional antenna feed positioned at a common focal distance from all reflector elements, allowing for adjustable beamwidth and increased field of view to counteract path loss and shadowing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If high power transmission is used to compensate for path loss at high frequencies, then signal strength is improved, but device complexity and practical deployment become problematic
Solution Approach 1:
The reflector is divided into multiple discrete elements (at least three) arranged in an array, each element independently contributing to beam formation. This segmentation allows the system to achieve high gain through constructive interference of signals from multiple elements rather than requiring high power transmission, thus reducing device complexity while maintaining signal strength.
Solution Approach 2:
The patent transitions from conventional planar reflector designs to a three-dimensional array configuration of reflector elements with specific spacing and positioning. By utilizing spatial arrangement in multiple dimensions and controlling the phase and amplitude of signals from each element, the system achieves directional beamforming and high gain without requiring high power transmission.
2Power
If directional beams are used to compensate for path loss, then energy concentration is improved, but system complexity increases
Solution Approach 1:
The directional beamforming capability is achieved through segmentation of the reflector into multiple controllable elements. Each element can be independently controlled to adjust beam direction and shape, providing directional energy concentration without requiring complex mechanical steering systems. The electronic control of individual elements simplifies the overall system architecture.
Solution Approach 2:
The reflector element array is designed to perform multiple functions: beamforming, beam steering, and beam shaping, all through electronic control of the same physical structure. This multi-functionality eliminates the need for separate mechanical steering mechanisms or multiple fixed directional antennas, reducing system complexity while maintaining energy concentration capability.
3Adaptability or versatility
If traditional antenna solutions are used at millimeter-wave frequencies, then compatibility with existing systems is maintained, but communication reliability deteriorates due to shadowing effects
Solution Approach 1:
The segmented reflector array enables electronic beamforming that creates focused directional beams with high gain, which can penetrate or绕过 shadowing obstacles more effectively than traditional omnidirectional or broad-beam antennas. The ability to dynamically steer and shape beams electronically maintains communication reliability in millimeter-wave frequencies while preserving compatibility with existing communication protocols.
4Ease of manufacture
If fixed beamwidth antennas are used, then design simplicity is maintained, but adaptability to varying user positions is reduced
Solution Approach 1:
The reflector element array enables dynamic beamforming where the beamwidth and direction can be electronically adjusted in real-time based on user position and communication requirements. By controlling the phase and amplitude of signals from individual elements, the system can adapt beam characteristics without mechanical movement, maintaining design simplicity while achieving high adaptability to varying user positions.
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 system effectively maintains reliable communication links by concentrating energy within a narrow beam, while also providing a wider field of view and adjustable beamwidth to accommodate varying user positions, making it commercially viable for high-frequency wireless communication networks.
Implementation Method 1
a multi-element reflector, each element comprising a concave reflective surface... the concave reflective surface of each element being configured to steer a radio-frequency beam in a different direction
Implementation Method 2
a directional antenna feed, configurable to direct a beam towards each element of the multi-element reflector
Data Source
AI summary
An apparatus is provided that includes: a multi-element reflector, each element comprising a concave reflective surface, the curvature of each element and focal distance of each element being common, the concave reflective surface of each element being configured to steer a radio-frequency beam in a different direction to that of the other elements; and a directional antenna feed, configurable to direct a beam towards each element of the multi-element reflector and positionable to be concurrently spaced said common focal distance from all of the elements of the multi-element reflector. One or more mechanisms are also provided by which, for example, a commercially viable millimeter wave base station can be realised. In particular, antenna arrangements are provided which support a field of view which facilitates establishment and maintenance of an effective communication link between a base station and a user with a desired level of reliability.