Capsule Antenna Layout to Isolate Battery Interference
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Solution Overview
Problem
Capsule devices face challenges in stable signal transmission due to the complex environment and uneven transmission medium within the human body, as well as interference from the metal components like the battery, leading to frequency deviations and ineffective communication.
Innovation Solution
The capsule device incorporates a frame that separates the cavity into distinct regions for the antenna module and power supply unit, with the antenna module on a flexible substrate and a conductor trace arrangement, and includes a control module to activate specific antenna units based on calibration information, minimizing interference and optimizing signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the antenna module is placed inside the capsule device cavity, then the device can transmit signals wirelessly, but the metal parts (such as battery) interfere with the antenna field and cause frequency deviation
Solution Approach 1:
The cavity is divided into multiple regions using a partition structure. The antenna module is placed in a first region while the battery is placed in a second region, physically separating the antenna from interfering metal components. This spatial segmentation reduces electromagnetic interference and improves signal transmission stability.
Solution Approach 2:
A partition structure acts as an intermediary barrier between the antenna module and the battery. This intermediate structure shields the antenna field from the metal parts, preventing direct interference and maintaining frequency stability during signal transmission.
2Device complexity
If the capsule device uses a fixed antenna configuration, then the structure is simple, but the transmission medium inside the human body is unstable causing frequency deviation
Solution Approach 1:
The antenna module is configured on a flexible substrate that can adapt its position and orientation within the cavity. This dynamic configuration allows the antenna to adjust to changes in the transmission medium environment inside the human body, maintaining stable signal transmission despite varying physiological conditions.
Solution Approach 2:
The system can adjust antenna operating parameters such as frequency and power based on feedback from the transmission environment. By dynamically changing these parameters in response to medium instability, the device maintains reliable communication despite the complex internal human body environment.
3Volume of moving object
If the antenna module is placed close to the battery to save space, then the device size is reduced, but the metal parts of the battery affect the antenna field shape
Solution Approach 1:
The cavity is segmented into distinct regions using a partition structure. The antenna module occupies a first region while the battery occupies a second region, ensuring adequate spatial separation. This segmentation allows the device to maintain a compact overall size while preventing the battery's metal parts from distorting the antenna's electromagnetic field shape.
Data Source
AI summary
The capsule device includes a shell having a cavity, a frame disposed in the shell, a circuit board, an antenna module, and a power supply unit. The cavity has a cross section of a first circle. The frame is configured to divide the cavity into at least a first region and a second region. The first region has a cross section at least including a second circle. The center of the second circle deviates from the center of the first circle and away from the second region. The circuit board is arranged in the cavity and includes a sensor module. The antenna module is coupled with the circuit board and arranged at the second region. The power supply unit is coupled with the circuit board and arranged at the first region.