Wireless Device Matching Network for USB Connector
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Solution Overview
Problem
Current wireless communication devices with inline USB connectors face challenges in maintaining consistent wireless performance across different terminal devices due to variations in physical size and ground connections, leading to inconsistent Total Radiation Power (TRP) and Total Isotropic Sensitivity (TIS) measurements.
Innovation Solution
Incorporating a matching network between the USB connector pins and the ground part of the main board, which connects to the antenna, to control the distribution of surface current and ensure consistent wireless performance by adjusting parameters such as capacitance to minimize differences in TRP and TIS across various terminal devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If two pins of USB connector are directly welded to ground part of main board, then device complexity is reduced, but wireless performance consistency across different terminal devices deteriorates
Solution Approach 1:
The patent introduces a matching network as an intermediary component between the USB connector pins and the ground part of the main board. This matching network includes impedance matching elements that mediate the connection, enabling consistent wireless performance across different terminal devices while maintaining relatively simple device structure.
2Reliability
If matching network is added between USB connector pins and ground part, then wireless performance consistency is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by implementing the matching network only at specific critical connection points (between USB pins and ground part) rather than throughout the entire device. This localized approach improves wireless performance consistency while minimizing the overall increase in device complexity.
3Reliability
If matching network parameters are adjusted to control surface current distribution, then TRP and TIS variations are reduced, but manufacturing precision requirements increase
Solution Approach 1:
The patent utilizes parameter changes in the matching network components (such as capacitance and inductance values) to control the distribution of surface current on the main board. By adjusting these parameters, the system achieves consistent TRP and TIS performance across different terminal devices while managing manufacturing precision requirements through standardized component selections.
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 ensures good wireless performance across different terminal devices by controlling surface current distribution, reducing TRP and TIS variations, and improving user experience by maintaining consistent performance when connected to different USB sockets.
Implementation Method 1
a matching network is arranged between the mainboard body and the mainboard end part and configured to control the distribution of the surface current induced by the antenna on the mainboard
Implementation Method 2
An edge which is of the at least one conductive part and is adjacent to the ground part and an edge which is of the ground part and is adjacent to the at least one conductive part has an arc shape
Data Source
Figure 1~2B
Figure 3~4
Figure 5~6
AI summary
A wireless communication device (100) and a method for manufacturing a wireless communication device (100). The wireless communication device includes: an antenna (110); a main board (120), including a ground part, where the ground part is connected to the antenna; at least one matching network (130) connected to the ground part; a USB connector (140), including a shell (142) and at least one first pin (141) extending from the shell, where the at least one first pin is connected to the at least one matching network, and the at least one first pin is one-to-one corresponding to the at least one matching network. The matching network may be configured to control wireless performance of an antenna radiation system of the wireless communication device.