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Method for solving electromagnetic compatibility problem of antenna of minitype terminal mobile phone

An electromagnetic compatibility and small terminal technology, applied in the direction of antenna coupling, resonant antenna, slender active unit end feed, etc., to achieve low cost, reduce volume, and solve contradictory effects

Inactive Publication Date: 2011-04-13
HUIZHOU SPEED WIRELESS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when encountering the index requirements of internationally renowned operators, which require both OTA and SAR and HAC, there is often nothing they can do.

Method used

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  • Method for solving electromagnetic compatibility problem of antenna of minitype terminal mobile phone
  • Method for solving electromagnetic compatibility problem of antenna of minitype terminal mobile phone

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Embodiment Construction

[0025] In order to facilitate the understanding of those skilled in the art, the structural principle of the present invention will be further described in detail below in conjunction with specific embodiments and accompanying drawings:

[0026] Such as figure 1 Shown, a solution to the electromagnetic compatibility of small terminal mobile phone antenna. It is printed with a wire 4 in the headroom area 3 on the PCB board 1 of the monopole antenna, one end of the wire 4 is connected to the ground end of the PCB board in the non-headroom area 2, and the other end extends in the headroom area 3, The wire 4 can effectively disperse the hot spot distribution of the electric field and the magnetic field of the HAC, thus solving the requirement of the HAC index in the electromagnetic compatibility. The wire 4 is led out in the direction opposite to the feeding point 5 in the clearance area 3, and the wire 4 is in an "L" shape. The width of the wire 4 is controlled within the rang...

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Abstract

The invention discloses a method for solving the electromagnetic compatibility problem of an antenna of a minitype terminal mobile phone. A monopole antenna is adopted as the antenna of the minitype terminal mobile phone, a wire is printed in the clearance area of the monopole antenna of a printed circuit board (PCB), one end of the wire is connected with the ground end of the PCB in a non-clearance area, the other end of the wire extends in the clearance area and the wire can effectively disperse distribution of hearing aid compatibility (HAC) electric field and magnetic field hotspots; the rear cover of the minitype terminal mobile phone is adhered with an electric conduction cloth or is sprayed with an electric conduction paint, and then the minitype terminal mobile phone is connected with the ground end of the PCB; and the transmitting and receiving properties of the antenna can be in an ideal state due to the matching circuit of a tuned antenna. The method for solving the electromagnetic compatibility problem of the antenna of the minitype terminal mobile phone has the beneficial effect of leading the antenna volume to be smaller to meet the specific absorption rate (SAR) andHAC indexes and over the air (OTA) test specification requirements on the premise of meeting the electromagnetic compatibility.

Description

technical field [0001] The invention relates to a small terminal mobile phone, in particular to an electromagnetic compatibility method for an antenna of a small terminal mobile phone. Background technique [0002] At present, due to the antennas of small terminals, ordinary printed circuit antennas or monopole antennas are often used. This type of antenna can meet the ordinary OTA (Over The Air) requirements, but it can hardly meet the electromagnetic compatibility indicators - SAR (Specific Absorption Rate) and HAC (Hearing Aid compatibility). This is also the bottleneck in the development of small terminal antennas. SAR means that under the action of an external electromagnetic field, an induced electromagnetic field will be generated in the human body. Since various organs of the human body are lossy media, the electromagnetic field in the body will generate currents, resulting in the absorption and dissipation of electromagnetic energy. RF energy radiated by cell pho...

Claims

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Application Information

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IPC IPC(8): H04B1/10H04M1/02H01Q1/52H01Q9/30
Inventor 王龙祥
Owner HUIZHOU SPEED WIRELESS TECH CO LTD
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