Method for improving electromagnetic compatibility of mobile phone antenna and hearing-aid

Abstract

The invention relates to a method for improving the electromagnetic compatibility of a mobile phone antenna and a hearing-aid. An IFA (Inverted-F Antenna) is adopted in antenna design, a clearance zone is arranged below the IFA, and double L-shaped matching circuits are adopted; an earth point of the IFA is arranged close to the side edge of mainboard of a mobile phone, and a feeding point and the earth point are parallel and close to one side of the center of the mainboard of the mobile phone; a low-frequency radiation line is formed by extending from the feeding point as the initial point to the side far away from the earth point, the low-frequency radiation line bends and extends towards one side of the earth point after bending downwards to form a high-frequency radiation line, and the low-frequency radiation line and the high-frequency radiation line form a square shape which is opened at the left side; and the length of the clearance zone is 3-10mm. An antenna line and the earth point are provided and matched with the clearance zone with proper size and the matching circuits, thus, a distribution map of hot spots of an electromagnetic field of the antenna can be effectively changed, and better HAC (Hearing Aid Compatibility) performance can be obtained; and the antenna has a simple structure, almost no additional cost, and wide adaptability.

Description

[0001] technical field [0002] The invention relates to the technical field of mobile phone antennas, in particular to a method for improving the electromagnetic compatibility (HAC) between mobile phone antennas and hearing aids. Background technique [0003] With the advancement of technology, portable electronic products such as mobile phones are developing in the direction of thinner and lighter in appearance, and their functions are becoming more and more powerful, such as color panels, digital photography and even video functions; at the same time, the electromagnetic compatibility of mobile phones and other electronic products Higher requirements have also been raised. The Federal Communications Commission (FCC) of the United States requires testing and improving the electromagnetic compatibility of mobile phones and hearing aids to help people wearing hearing aids avoid the electromagnetic interference generated by mobile phones from being coupled to the hearing aids...

AI Technical Summary

Problems solved by technology

However, if you meet the index requirements of internationally renowned operators, which require both the human body induction index and the electromagnetic compatibility index HAC, there is often nothing you can do.

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