Battery-Responsive Antenna Tuning With Switched Passive Elements
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wearable electronic devices face communication performance deterioration in low frequency bands due to varying battery capacity, which affects antenna efficiency as the battery thickness changes, restricting internal space and component mounting.
Innovation Solution
An electronic device with a switch module (RF switch) that connects passive elements to an antenna radiator based on remaining battery capacity, optimizing communication performance by adjusting passive element values for the first frequency band (600 MHz to 900 MHz).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the battery capacity varies, then the battery thickness changes, but the antenna efficiency deteriorates
Solution Approach 1:
The patent implements a switch module that dynamically connects different passive elements to the antenna radiator based on battery capacity levels. The processor determines the battery capacity and controls the switch to connect appropriate passive elements, making the antenna system adaptive to changing battery conditions rather than static
Solution Approach 2:
The patent changes the electrical parameters of the antenna system by connecting different passive elements (with different impedance values) to the antenna radiator depending on battery capacity. This parameter adjustment compensates for the effect of varying battery thickness on antenna efficiency
2Reliability
If multiple passive elements are connected to the antenna radiator, then communication performance is maintained, but the device complexity increases
Solution Approach 1:
The patent divides the passive elements into multiple groups, where each group contains passive elements with different impedance values suitable for different battery capacity ranges. The switch module selectively connects one group at a time to the antenna radiator, managing complexity through organized segmentation rather than random multiple connections
Data Source
AI summary
According to an embodiment, an electronic device may include: a battery, a retaining member comprising a support disposed on one surface of the battery and configured to function as an antenna corresponding to a first frequency band, and a printed circuit board disposed on an other surface of the battery, the printed circuit board including a communication circuit electrically connected to the retaining member. The electronic device may include a switch configured to electrically connect at least one passive element among multiple passive elements and the retaining member, a memory, and at least one processor, comprising processing circuitry, operatively connected to the communication circuit, the switch, and the memory. According to an embodiment, at least one processor, individually and/or collectively, may be configured to: identify a remaining capacity of the battery; identify information regarding a passive element to be connected to the retaining member, based on the identified remaining capacity of the battery and the first frequency band; select at least one passive element among the multiple passive elements, based on the identified information regarding a passive element; and control the switch such that the at least one selected passive element and the retaining member are electrically connected.