Coplanar MMW Antenna Array for Directional Switching
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Solution Overview
Problem
Millimeter-wave (MMW) communication systems face limitations in wireless link coverage due to the directional nature of MMW propagation, often requiring high-cost complex solutions like phased array antenna systems, and suffer from high atmospheric oxygen absorption and attenuation, especially in the 60 GHz band, which reduces transmission range but offers frequency reuse advantages for mobile applications.
Innovation Solution
The implementation of directionally switchable antenna systems with coplanar antenna array structures that split and combine MMW signals using power splitters and combiners, allowing for directional transmission and reception of MMW radio signals within the MMW band, enabling high-speed, low-cost, and reliable communications between electronic devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If phased array antenna systems are used to achieve directional MMW transmission, then wireless link coverage is improved, but device complexity and cost increase
Solution Approach 1:
The antenna array structure is segmented into multiple independent antenna elements positioned at different locations on a planar surface. Each antenna element can be independently controlled to transmit or receive MMW signals in specific directions, allowing the system to achieve directional coverage without requiring complex phased array mechanisms. The segmentation enables simple switching between different directional paths.
Solution Approach 2:
Instead of using complex electronic phase shifting mechanisms to achieve directional control, the patent inverts the approach by using spatially separated antenna elements with fixed directional characteristics. The directionality is achieved through the physical arrangement and switching between antenna elements rather than through complex signal processing, simplifying the overall system.
2Reliability
If multiple antenna feed points are used for directional switching, then transmission coverage is improved, but manufacturing complexity increases
Solution Approach 1:
Multiple antenna elements are merged onto a single planar surface structure, sharing common support infrastructure and feeding mechanisms. The coplanar arrangement allows all antenna elements to be manufactured using the same process on a single substrate, simplifying fabrication while enabling multiple directional transmission paths through the shared platform.
Solution Approach 2:
The planar antenna array structure serves multiple functions: it provides mechanical support for all antenna elements, defines the coplanar geometry for consistent electrical characteristics, and enables both transmission and reception operations. This multi-functionality reduces the number of separate components needed and simplifies the manufacturing process.
3Speed
If MMW signals are transmitted through atmospheric oxygen absorption bands, then high-frequency communication capabilities are achieved, but signal attenuation increases
Solution Approach 1:
The system dynamically switches between different antenna elements based on the desired transmission direction and environmental conditions. This dynamic switching allows the system to adapt to atmospheric conditions by selecting optimal transmission paths, potentially avoiding directions with higher atmospheric attenuation while maintaining high data transmission speeds through the 60 GHz band.
Solution Approach 2:
The patent operates in the 60 GHz MMW band which offers vast bandwidth for high-speed communication. By utilizing the wide frequency spectrum available in this band, the system achieves Gigabit transmission speeds despite the inherent atmospheric attenuation, as the high data rate compensates for the signal loss through efficient use of the available bandwidth.
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 facilitates high-speed gigabit data communication services by ensuring directional transmission and reception of MMW signals, overcoming coverage limitations and attenuation issues, while providing cost-effective and reliable MMW band communications.
Implementation Method 1
a power splitter that divides a data modulated MMW signal into a first MMW data modulated signal and a second MMW data modulated signal that is identical to the first MMW data modulated signal
Implementation Method 2
The first data modulated MMW signal that is coupled to the first antenna feed point generates a first MMW radio signal that is transmitted at a first propagation direction by the antenna array structure
Implementation Method 3
a power combiner that receives one of a first MMW radio signal and a second MMW radio signal such that the first MMW radio signal is received from the first antenna coupling point and the second received MMW radio signal at the second antenna coupling point
Data Source
AI summary
A millimeter-wave (MMW) communication system may include an antenna array structure operating within a MMW band, having both a first antenna coupling point and a second antenna coupling point, whereby the first and the second location of the antenna coupling points are within a coplanar surface on which the antenna array structure is formed. The system may further include a single MMW transmitter device having a power splitter that splits a data modulated MMW signal into a first MMW data modulated signal and a second MMW data modulated signal identical to the first MMW data modulated signal, such that the first data modulated MMW signal is coupled to the first antenna coupling point for radio propagation at a first direction, and the second data modulated MMW signal is coupled to the second antenna coupling point for radio propagation at a second direction.