Antenna Coupler Configuration for Wireless Device Isolation
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Solution Overview
Problem
Modern wireless devices face challenges in accommodating multiple antennas within limited space due to physical constraints and interference, which affects antenna performance in terms of reflection coefficient and radiated efficiency.
Innovation Solution
The use of antenna configurations with couplers allows multiple antennas to operate within the same or adjacent volumes of a device body, utilizing indirect or direct couplers to facilitate electromagnetic coupling, thereby improving isolation and efficiency across different frequency ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple antennas are added to support new cellular bands and MIMO, then communication capability is improved, but device volume and space requirements increase
Solution Approach 1:
The patent combines multiple antenna functions into a single integrated antenna structure that supports multiple cellular bands (600 MHz to 3800 MHz) and MIMO operations. This merging approach allows the device to maintain enhanced communication capabilities while reducing the overall volume required for antenna systems.
Solution Approach 2:
The integrated antenna is designed to perform multiple functions simultaneously, including support for different cellular bands, MIMO transmissions, and diverse reception. This multi-functionality eliminates the need for separate antennas for each function, thereby reducing device volume while maintaining adaptability.
2Reliability
If antenna volume is increased to improve performance, then reflection coefficient and radiated efficiency are improved, but available space in mobile device is reduced
Solution Approach 1:
The patent employs parameter changes in the antenna design, including adjustable resonant frequencies and impedance matching parameters, to optimize antenna performance within a compact volume. By tuning these parameters, the antenna achieves good reflection coefficient and radiated efficiency without requiring increased physical size.
Solution Approach 2:
The integrated antenna structure utilizes three-dimensional space more efficiently by transitioning from traditional planar antenna layouts to volumetric configurations. This dimensional approach allows the antenna to achieve sufficient performance metrics while occupying less overall space within the mobile device.
3Volume of moving object
If antennas are placed close to outer casing to reduce volume, then device compactness is improved, but coupled interference increases
Solution Approach 1:
The patent introduces an integrated antenna structure that acts as an intermediary between the signal source and the external environment. This unified antenna design manages electromagnetic coupling and interference internally, preventing harmful interactions even when placed close to the outer casing, thus maintaining device compactness without sacrificing performance.
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 configuration enables efficient operation of multiple antennas within a compact space, enhancing communication performance by reducing parasitic coupling and interference, and covering a wide range of frequencies from 600 MHz to 3800 MHz.
Implementation Method 1
utilizing indirect or direct couplers to facilitate electromagnetic coupling
Data Source
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AI summary
A cellular low band antenna is indirectly coupled to communication signals via a first coupler that is located within a same volume of a body as one or more wireless local area network (WLAN) antennas. Various antenna configurations can include the one or more WLAN antennas being indirectly coupled to communication signals via a second coupler within the same volume as the cellular low band antenna. A high band antenna is located in a different volume that is adjacent to the volume of the cellular low band antenna and the one or more WLAN antennas. Another similar antenna system can be provided in a separate volume for diversity communications in a communication device, such as a tablet, laptop or other such communication device.