Dual-Mode Antenna Array Layout for Compact Multi-Band AoA
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently utilizing space within access points (APs) due to the need for antennas that can operate across multiple frequency bands while determining Angle of Arrival (AoA) for signal direction, often requiring larger form factors and inefficient use of available space.
Innovation Solution
A low-profile AoA antenna array utilizing dual mode and single mode antennas with a switching architecture, allowing simultaneous operation across two different frequencies by configuring dual mode antennas as monopole or loop antennas based on frequency, and using a host controller for non-contemporaneous access to optimize space usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional single-frequency antennas are used to support multiple frequency bands, then multiple separate antennas are required, but this increases the device volume and reduces space utilization
Solution Approach 1:
The patent implements dual-mode antennas that can operate in both monopole mode and loop mode, enabling a single antenna structure to support multiple frequency bands (2.4 GHz and 5 GHz) and multiple communication standards (Wi-Fi and Bluetooth). This multi-functionality eliminates the need for separate antennas for different frequencies, directly reducing the overall antenna array volume while maintaining adaptability across frequency bands
Solution Approach 2:
The patent employs dynamic switching between monopole mode and loop mode for dual-mode antennas based on the active frequency band. A switching mechanism controlled by a host controller dynamically reconfigures the antenna operation mode, allowing the same physical antenna structure to adapt its electrical characteristics for different frequencies, thereby achieving multi-frequency operation without increasing device volume
2Measurement precision
If multiple antennas are deployed for AoA determination across different frequencies, then accurate angle measurement is achieved, but the device form factor increases
Solution Approach 1:
The patent uses dual-mode antennas that serve multiple functions: they act as monopole antennas for 5 GHz Wi-Fi operations and as loop antennas for 2.4 GHz Wi-Fi and Bluetooth operations. This universality allows the same compact antenna structure to participate in AoA determination for multiple frequency bands, maintaining measurement precision across different standards without requiring separate antenna arrays for each frequency
Solution Approach 2:
The patent merges the functionality of multiple frequency-specific antennas into a unified dual-mode antenna array. By combining monopole and loop antenna capabilities in a single array structure, the system achieves AoA determination accuracy for both 2.4 GHz and 5 GHz bands using one compact array, thereby reducing the overall device form factor while preserving measurement precision
3Volume of moving object
If dual mode antennas with switching architecture are implemented, then space utilization is optimized, but the device complexity increases
Solution Approach 1:
The patent introduces a host controller as an intermediary that manages the switching between monopole mode and loop mode for dual-mode antennas. This controller receives frequency band information and automatically configures the appropriate antenna modes, abstracting the complexity of mode switching from the user and simplifying the overall system operation despite the underlying switching mechanism
Solution Approach 2:
The switching mechanism is integrated into the antenna system itself, with the host controller automatically determining the active frequency band and configuring the antenna modes without requiring manual intervention. The system self-manages the complexity of mode switching based on operational requirements, optimizing space utilization while keeping the control mechanism automated and streamlined
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 antenna array that efficiently supports multiple communication standards and frequency bands, enhancing space utilization and improving AoA determination accuracy by optimizing antenna configuration based on active frequency.
Implementation Method 1
causes the first antenna element to radiate electromagnetic energy in a first radiation pattern in the first mode and causes the second antenna element to radiate electromagnetic energy in a second radiation pattern in the second mode
Data Source
Figure 1A
Figure 1B~1C
Figure 1D
AI summary
A dual mode antenna that comprises: a first conductive piece; and a second conductive piece, configured to electromagnetically couple with the first conductive piece through a dielectric at a second frequency to operate as a loop antenna with the first conductive piece and configured to operate independently of the first conductive piece at a first frequency to operate as a monopole antenna. The dual mode antenna can be included in an antenna array as one of a plurality of dual mode antennas coupled to a routing substrate or a reference dual mode antenna coupled to the routing substrate along with a plurality of single mode antennas coupled to the routing substrate; wherein each antenna of the plurality of dual mode antennas, the reference dual mode antenna, and the plurality of single mode antennas is arranged evenly relative to a first neighboring antenna and a second neighboring antenna.