Anti-Interference Coil Module for RF Magnetic Field Suppression
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Solution Overview
Problem
Terminal devices, such as mobile phones, suffer from electromagnetic interference due to changing magnetic fields generated by radio frequency circuits, affecting the normal operation of electronic components like audio players.
Innovation Solution
An anti-interference module is introduced, comprising a circuit board with an interfering source, a device disposing space, and an anti-interference component that generates a compensation magnetic field or consumes energy from the interference magnetic field to reduce its intensity, using a second coil and magnetic field shielding element to minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a radio frequency circuit operates on the circuit board, then the radio frequency function is achieved, but a changing magnetic field is generated that interferes with surrounding electronic devices
Solution Approach 1:
An anti-interference component is introduced as an intermediary element between the interfering source and the electronic device. This component generates a compensation magnetic field that counteracts the interference magnetic field, or consumes the interference magnetic field energy through magnetic coupling, thereby protecting the electronic device from magnetic field interference without affecting the radio frequency circuit operation
Solution Approach 2:
The anti-interference component performs preliminary counter-action by generating a compensation magnetic field in advance that opposes the interference magnetic field, or by being pre-positioned to consume the interference magnetic field energy through magnetic coupling, preventing the interference from affecting the electronic device in the first place
2Object-affected harmful factors
If the anti-interference component generates compensation magnetic field or consumes interference energy, then magnetic induction intensity is reduced, but the device complexity increases
Solution Approach 1:
The anti-interference component changes the magnetic field parameters in the device disposing space by generating a compensation magnetic field with opposite polarity or by consuming the interference magnetic field energy, thereby altering the magnetic induction intensity parameter to reduce interference while maintaining a relatively simple component structure
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 anti-interference module effectively reduces magnetic induction intensity in the device disposing space, ensuring normal operation of electronic devices by minimizing interference from the interfering source, optimizing component layout, and conserving energy.
Implementation Method 1
the anti-interference component is configured to generate a compensation magnetic field that overlaps the interference magnetic field
Implementation Method 2
to consume electric energy generated by coupling between the interference magnetic field and the anti-interference component
Implementation Method 3
the magnetic field shielding element can shield a magnetic field generated by the second coil
Data Source
AI summary
An anti-interference module and a terminal device are provided. The anti-interference module includes a circuit board, an interfering source, a device disposing space, and an anti-interference component. The interfering source is disposed on the circuit board, where the interfering source may generate a changing interference magnetic field; the device disposing space is provided on a side of the circuit board and is used to dispose an electronic device with a first coil; and the anti-interference component is configured to generate a compensation magnetic field that overlaps the interference magnetic field, or to consume electric energy generated by coupling between the interference magnetic field and the anti-interference component to reduce magnetic induction intensity of the device disposing space. This application may be applied to the terminal device such as a mobile phone.