Bluetooth and Wi-Fi Antenna Layout for Edge-Side Signal Isolation
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Solution Overview
Problem
Existing multi-antenna systems, such as those combining Bluetooth and Wi-Fi antennas, face challenges in data transmission due to the placement of antennas on opposite side edges of a substrate, which necessitates one antenna being farther from the edge, thereby affecting signal transmission efficiency.
Innovation Solution
The solution involves arranging both the Bluetooth antenna and the WLAN antennas on the same side edge of the substrate, with at least two branches of the WLAN antennas and the Bluetooth antenna positioned at intervals. This configuration includes using a magnetic current source Bluetooth antenna and current source WLAN antennas, with separate RF grounds and dividing slits to enhance isolation and facilitate better signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the BT antenna and WLAN antennas are respectively provided on two side edges of the substrate, then the antennas can be placed on the substrate, but one antenna must be farther from the edge which affects signal transmission efficiency
Solution Approach 1:
The patent combines multiple antenna types (BT antenna and WLAN antennas) and places them on the same side edge of the substrate rather than distributing them on opposite edges. This merging approach allows all antennas to be positioned at the edge for optimal signal transmission, resolving the contradiction between transmission efficiency and placement flexibility.
Solution Approach 2:
The patent transitions from a one-dimensional distribution (antennas on opposite edges along one dimension) to a two-dimensional arrangement (multiple antennas on the same edge, utilizing both length and width dimensions of the substrate). This dimensional change enables better edge positioning for all antennas while maintaining adequate spacing.
2Reliability
If the BT antenna and WLAN antennas are provided on the same side edge at intervals, then all antennas can be positioned at the edge for better signal transmission, but the antenna isolation and interference prevention become more challenging
Solution Approach 1:
The patent applies different ground structures in different local areas: a continuous ground for the BT antenna and divided grounds for WLAN antennas. This local quality differentiation provides edge positioning for all antennas while maintaining appropriate isolation through localized ground structure variations, resolving the contradiction between transmission efficiency and interference prevention.
Solution Approach 2:
The patent segments the ground structure into different regions: a continuous ground for the BT antenna and divided grounds for WLAN antennas. This segmentation allows each antenna type to have optimized grounding while all antennas remain positioned at the substrate edge, addressing both transmission efficiency and interference concerns.
3Reliability
If separate RF grounds and dividing slits are used for BT and WLAN antennas, then antenna isolation is improved, but the device complexity increases
Solution Approach 1:
The patent uses local quality differentiation by providing a continuous ground for the BT antenna and divided grounds for WLAN antennas only where needed. This selective approach improves antenna isolation through appropriate ground segmentation without unnecessarily complicating the entire ground structure, balancing isolation performance with structural simplicity.
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 allows all antennas to be positioned closer to the edge of a terminal board, improving signal transmission efficiency and overcoming the data transmission limitations of previous designs. The enhanced isolation between antennas, achieved through orthogonal polarization and separate RF grounds, results in improved throughput and electromagnetic compatibility.
Implementation Method 1
a magnetic current source Bluetooth antenna and two current source WLAN antennas which are arranged on a same side edge of the substrate and are in an interval distribution
Implementation Method 2
the substrate is provided with a circuit ground, a first WLAN antenna RF ground, and a second WLAN antenna RF ground; a first dividing slit is defined between the circuit ground and the first WLAN antenna RF ground
Data Source
AI summary
A signal transmission apparatus is provided in the present disclosure, including: a substrate, and a BLUETOOTH antenna and WI-FI antennas which are provided on a same side edge of the substrate. At least two branches of the WI-FI antennas are provided, and the BLUETOOTH antenna and the WI-FI antennas are provided at intervals. According to the present disclosure, the BLUETOOTH antenna and the WI-FI antennas are provided on the same side edge of the substrate, and the BLUETOOTH antenna and the WI-FI antennas are provided at intervals, so that all the antennas of the signal transmission apparatus are provided at an edge of a terminal board, thereby facilitating signal transmission and solving a problem in the prior art that the BLUETOOTH antenna and the WI-FI antennas are respectively provided on two side edges of the substrate, affecting data transmission.