Circuit for improving mobile phone coupling performance

Abstract

The invention discloses a circuit for improving the coupling performance of the mobile phone. The invention includes a circuit board, as well as an antenna, a receiver, and a chip which are all arranged on the circuit board and are communicated with the circuit board. The chip includes an audio unit, the receiver is communicated with an audio unit of the chip through a plurality of leads, and an inductor is serially connected to the leads. By serially connecting the inductor on the leads of the receiver and the audio unit, the invention can effectively increase the high-frequency impedance on the route, can prevent the RF signal from being transmitted on the route, and then can restrain the coupling between the antenna and the receiver, can improve the coupling power of the mobile phone, and can amend the aerial radiation pattern, the antenna radiation efficiency and sensitivity.

Description

technical field [0001] The invention relates to a communication device circuit, in particular to a circuit for improving the coupling performance of a mobile phone with a built-in antenna. Background technique [0002] The quality of the mobile phone signal is directly affected by the mobile phone antenna, and the performance of the mobile phone antenna is also related to many components on the mobile phone, such as liquid crystal display (Liquid Crystal Display, LCD), flexible printed circuit board (Flexible Printed Circuit, FPC), speaker, Receivers, vibration motors, metal structural parts, electroplated decorative parts, etc. are closely related. In the PCB layout of the mobile phone, the position of the receiver needs to be close to the human ear, so it is generally on the top of the mobile phone, and this position is fixed. The antenna can generally be placed on the lower or upper part of the mobile phone. If it is placed on the lower part of the mobile phone, it will ...

AI Technical Summary

Problems solved by technology

From the actual situation, at 800MHz, the existence of the receiver will cause the coupling power to drop by about 0.5db. For 1.9GHz, the impact is more serious, the pattern is severely distorted, the direction of the receiver appears deep depression, and the antenna radiation efficiency drops by about 20%

[0005] To solve the influence of the receiver, it is necessary to adjust the position of the receiver to an area far away from the antenna, at least 5mm away from the antenna, but at the same time it must be relatively close to the human ear, so only by adjusting the position of the receiver and the antenna, it will The large blank area above the sound hole brings great inconvenience to the design of the mobile phone and makes the mobile phone look very uncoordinated

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