Overlapping Antenna Coupling With Switchable RF Impedance Paths
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Solution Overview
Problem
The presence of high-frequency band antennas can negatively impact the performance of low and mid-frequency band antennas, leading to suboptimal communication performance.
Innovation Solution
An electronic device with a first antenna for a low or mid-frequency band, a ground switch, a second antenna for a high-frequency band, and a band selection switch that identifies and selects an appropriate RF path for communication, allowing the processor to control impedance and optimize antenna coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple antennas for different frequency bands are placed in overlapping positions to save space, then device compactness is improved, but antenna coupling interference increases
Solution Approach 1:
The patent changes the impedance parameter of the high-frequency band antenna dynamically based on the communication band being used. By adjusting the impedance through the band selection switch, the patent reduces the coupling interference between overlapping antennas, allowing compact antenna placement while maintaining performance. The impedance adjustment modifies the electromagnetic field distribution, reducing harmful interactions between adjacent antennas.
Data Source
AI summary
An electronic device and method are disclosed. The electronic device includes a first antenna configured to communicate using a first frequency band group, a ground switch coupled to the first antenna, a second antenna configured to communicate using a second frequency band group, wherein the second antenna overlaps the first antenna, a band selection switch configured to select one of multiple radio frequency (RF) paths for the second frequency band group, and a processor. The processor implements the method, including determining a communication frequency band, when the communication frequency band is unsupported by the second antenna, identifying an RF path corresponding to the communication frequency band from among the multiple RF paths, and controlling the band selection switch to select the identified RF path for operative connection to the second antenna.