Electromagnetic interference (or EMI, also called radio frequency interference or RFI) is a (usually undesirable) disturbance that affects an electrical circuit due to electromagnetic radiation emitted from an external source. The disturbance may interrupt, obstruct, or otherwise degrade or limit the effective performance of the circuit. The source may be any object, artificial or natural, that carries rapidly changing electrical currents, such as an electrical circuit, the Sun or the Northern Lights.

电磁干扰（或EMI，也称为射频干扰或RFI）是一种（通常是不希望的）干扰，由于外部源发射的电磁辐射而影响电路。干扰可能会中断、阻塞或以其他方式降低或限制电路的有效性能。源电磁干扰可以是任何携带快速变化的电流的物体，无论是人造的还是自然的，例如电路，太阳或北极光。

EMI can be induced intentionally for radio jamming, as in some forms of electronic warfare, or unintentionally, as a result of spurious emissions and responses, intermodulation products, and the like. It frequently affects the reception of AM radio in urban areas. It can also affect cell phone, FM radio and television reception, although to a less extent.

EMI可以被有意地用于无线电干扰，如某些形式的电子战，或者无意中，由于杂散发射和响应，互调产物等。它经常影响城市地区AM无线电的接收。它也可能影响手机，FM收音机和电视接收，尽管干涉程度相对较低。

EMI more or less interferes the work of the oscillator. The easiest way to reduce EMI is to have a good pcb layout. For example, you should have a good ground plane, every differential pair should be closely spaced, no right angle turn, use as less via as possible, etc.  Set the oscillator as far as possible from the power supply, the electric fan, or the motor.   If possible, add a cover to the oscillator to reduce the EMI from any interference of the devices mentioned above.

电磁干扰EMI会或多或少影响晶振振荡电路的正常工作，而降低EMI的最简单方法是拥有良好的PCB布局。例如，应该有一个良好的接地平面，每个差分对应该紧密间隔，没有直角转弯，使用尽可能少的过孔等。另外，晶振尽量远离电源、风扇或马达等高干扰源，或针对晶振加信号屏蔽罩处理。

The internal structure of crystal resonators manufactured by Genuway Technology is designed by a special anti-electromagnetic circuit to effectively reduce the influence of electromagnetic interference, and its output frequency has high precision and high stability, so it can provide an accurate and stable reference clock for the IC. For RF electronic products, such as Bluetooth, WiFi and other short-distance wireless communication, it is also the best choice to ensure high-speed and stable wireless data transmission between devices.

晶诺威科技制造的无源晶振内部结构经由专门的抗电磁电路设计，可有效降低电磁干扰的影响，其输出频率具备高精度和高稳定度，因此可以为IC提供精准和稳定的参考时钟。针对RF射频类电子产品，如蓝牙、WiFi等短距离无线通讯，抗电磁干扰（EMI）系列晶振也是保障设备之间数据无线高速稳定传输的最佳之选择。