Dielectric Antenna Coupling Guided Waves to Free Space
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Solution Overview
Problem
The increasing demand for higher bandwidth in communication networks due to widespread use of smartphones and data-intensive services poses challenges for existing wireless infrastructure, particularly in providing efficient mobile bandwidth and reliable broadband access.
Innovation Solution
A guided wave communication system that utilizes electromagnetic waves bound to transmission media such as wires or dielectric materials, allowing for efficient data transmission without the need for a separate electrical return path, and employs coupling devices to launch and extract guided waves at millimeter-wave frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional wireless infrastructure is used to provide mobile bandwidth, then coverage area is maintained, but propagation losses increase and transmission distance is limited
Solution Approach 1:
The patent introduces a dielectric antenna as an intermediary component that couples guided electromagnetic waves from a transmission medium (coaxial cable) to free-space propagation. The dielectric antenna acts as a mediator that transforms the wave guidance mechanism, allowing signals to transition from bound states in the cable to unbound states in free space, thereby reducing propagation losses while maintaining infrastructure simplicity
Solution Approach 2:
The patent changes the propagation parameter from guided wave mode (bound to transmission medium) to unguided wave mode (free-space propagation) by using a dielectric antenna with specific permittivity characteristics. This parameter change enables the electromagnetic waves to detach from the transmission medium and propagate through free space with reduced attenuation, directly addressing the propagation loss issue
2Reliability
If guided wave transmission is used, then propagation losses are reduced and transmission distance increased, but the system requires specific coupling devices at transmission points
Solution Approach 1:
The dielectric antenna serves multiple functions: it acts as both a transmission element for launching guided waves into free space and as a receiving element for capturing free-space waves and guiding them into the cable. This multi-functionality reduces the need for separate coupling devices at transmit and receive ends, simplifying the overall system while maintaining high transmission reliability
Solution Approach 2:
The dielectric antenna is designed to self-couple with the coaxial cable through its inherent geometric and electromagnetic properties. The antenna's dielectric structure naturally guides the electromagnetic waves from the cable interface into free space without requiring additional active coupling mechanisms, thereby reducing system complexity while ensuring reliable transmission
3Productivity
If macrocell base stations are used to provide coverage, then service area is maintained, but bandwidth capability is insufficient for increasing data demand
Solution Approach 1:
The patent segments the transmission path into two distinct sections: a guided wave section using coaxial cable for high-bandwidth signal transport over moderate distances, and an unguided wave section using dielectric antennas for free-space propagation to reach distant receivers. This segmentation allows the system to achieve high bandwidth capability in the cable section while managing signal attenuation in the free-space section through optimized antenna design
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
This solution enables reduced propagation losses and increased transmission distances for communication signals, supporting higher bandwidth requirements while simplifying infrastructure by eliminating the need for separate forward and return paths, thus enhancing network efficiency and reliability.
Implementation Method 1
A dielectric antenna may be used to receive the electromagnetic waves from the dielectric core and direct them to a feed point of the dielectric antenna
Implementation Method 2
A guided wave communication system that utilizes electromagnetic waves bound to transmission media such as wires or dielectric materials, allowing for efficient data transmission
Data Source
AI summary
Aspects of the subject disclosure may include, for example, receiving, by a feed point of a dielectric antenna, electromagnetic waves from a dielectric core coupled to the feed point without an electrical return path, where at least a portion of the dielectric antenna comprises a conductive surface, directing, by the feed point, the electromagnetic waves to a proximal portion of the dielectric antenna, and radiating, via an aperture of the dielectric antenna, a wireless signal responsive to the electromagnetic waves being received at the aperture. Other embodiments are disclosed.