CN202534780U

CN202534780U - Low radiation flat computer antenna

Info

Publication number: CN202534780U
Application number: CN 201220185851
Authority: CN
Inventors: 王建安
Original assignee: Huizhou Speed Wireless Technology Co Ltd
Current assignee: Huizhou Speed Wireless Technology Co Ltd
Priority date: 2012-04-27
Filing date: 2012-04-27
Publication date: 2012-11-14
Anticipated expiration: 2022-04-27

Abstract

The utility model relates to a low radiation flat computer antenna. The low radiation flat computer antenna comprises a high frequency line generating a high frequency signal and a low frequency line generating a low frequency signal, wherein the high frequency line is an L-shaped antenna extending from a feeding point, the low frequency line is an L-shaped antenna extending from a grounding point, the low frequency line is arranged at a periphery of the high frequency line in a semi-surrounded mode, and the low frequency line and the high frequency line are mutually coupled to generate another low frequency signal. Compared with the prior art, the low radiation flat computer antenna has properties of easy realization, simple structure, good compatibility and no additional cost, can effectively reduce SAR indexes of the flat computer antenna while guaranteeing antenna OTA performance, and is realized by combination of antenna routing and structure optimization.

Description

A kind of low radiation panel computer antenna

Technical field

The utility model relates to a kind of panel computer Antenna Design scheme.

Background technology

The notion of panel computer is proposed in 2002 by Microsoft, but at that time owing to the restrictive condition of software and hardware and network environment, does not come into vogue.Up to 2010, panel computer just prevailed suddenly.IPad is issued at san francisco, usa Ou Babu also that arts center on January 27th, 2010 by CEO Steve Qiao Busi.The success of iPad lets each IT vendor sight focused on again on " panel computer ", along with panel computer is popularized gradually and is become the consumer goods common in the life, when studying panel computer work in the industry to the radiation index S AR of human body also more and more widely.

The panel computer antenna is an important devices of concentrated reflection panel computer radiance.In recent years, panel computer has obtained development at full speed, and the panel computer antenna is tending towards multifrequencyization; The panel computer antenna often adopts the Monopole antenna, though the Monopole antenna does not receive the restriction of volume, specific absorption rate SAR (Specific Absorption Rate) and human body sensing index are not special good always.The current SAR that is spoken of in the world; All be to the cellular mobile phone radiation that Wireless Telecom Equipment produced such as (being commonly called as mobile phone); Promptly under the effect of external electromagnetic field, will produce induction field in the human body, because the various organs of human body are lossy dielectric; Therefore electromagnetic field will produce electric current in the body, causes absorbing and the dissipation electromagnetic energy.The RF energy of antenna for mobile phone institute radiation can be absorbed by the body and produce heat, and transmits through the body heat regulation system of human body.The definition of SAR is a ratio weighing human brain and absorption of human body or consume electromagnetic power; It is the abbreviation of English Specific Absorption Rate; Be that how many radio frequency radiation energy of metering are by the representation unit of health institute actual absorption; Be called special absorption ratio or claim SAR, represent with watt/every kilogram (W/kg) or milliwatt/every gram (mW/g).The test of SAR is the radio wave energy that produces via Wireless Telecom Equipment, and measuring actually through testing equipment, how many electromagenetic wave radiations human body (just brain or health) has absorbed.And the induction index of panel computer test mainly is meant human body indicators, and test mode is mainly the process that the anthropomorphic dummy normally uses panel computer, lets panel computer press close to manikin, and simulated human tissue liquid is equipped with in the manikin the inside.Learn panel computer in real work through such test model, what electromagenetic wave radiation energy has been absorbed by the body.At present international standard has two, and one is European standard 2w/kg, and one is Unite States Standard 1.6w/kg, and its concrete implication is meant, with 6 minutes be timing, the electromagnetic radiation energy that the per kilogram tissue absorbs must not be above 2 watts.Test through actual items finds that the SAR index of the panel computer of Monopole antenna form is easy to exceed standard.

At present, do not have effective and lower-cost solution in the industry, general solution all is through reducing the performance index of far-field radiation, just reduce the index of OTA (active test), exchanging the up to standard of SAR index for.But run into the index request of international well-known operator, not only required the index of OTA up to standard but also require the SAR index up to standard, often just powerless.This has also just become present panel computer antenna stumbling-block preventing the development.

The utility model content

In view of this, the utility model technical problem that will solve provides a kind of SAR of reduction index, compatible good low radiation panel computer antenna.

The utility model adopts following scheme to realize:

A kind of low radiation panel computer antenna; Comprise HF link that produces high-frequency signal and the audio line that produces low frequency signal; Described HF link is an inverted-L antenna from the distributing point extension; Described audio line is the inverted-L antenna that extends from earth point, and audio line is located at the HF link periphery with the semi-surrounding form, and audio line and HF link are coupled mutually and produce another low frequency signal.

As the improvement to such scheme, described HF link and audio line are printed on the flat circuits internal circuit board, or are affixed on the panel computer screen frame, or adopt LDS technology to be printed on the screen frame.

And antenna below empty regions length is 12mm ~ 15mm.

Compared with prior art, the utility model is realized convenient, and is simple for structure; And can under the prerequisite that guarantees antenna OTA performance, effectively reduce the SAR index of panel computer antenna; Compatible good, and do not have fringe cost, combine through antenna cabling and structure optimization and realize.

Description of drawings

Fig. 1 is the utility model embodiment overall structure sketch map.

Embodiment

Below will combine accompanying drawing and embodiment that the utility model is described in further detail for the ease of it will be appreciated by those skilled in the art that:

Shown in accompanying drawing 1; The utility model embodiment discloses comprises the HF link 1 that produces high-frequency signal and the audio line 2 of generation low frequency signal; Its this HF link 1 is an inverted-L antenna from distributing point 11 extensions; This audio line 2 is the inverted-L antenna that extends from earth point 21, and audio line 2 is located at HF link 1 periphery with the semi-surrounding form, and audio line 2 is coupled mutually with HF link 1 and produces another low frequency signal.

And this HF link 1 and audio line 2 are printed on the flat circuits internal circuit board, or are affixed on the panel computer screen frame, or adopt LDS technology to be printed on the screen frame.

This antenna is taked the double-fed point mode, can directly be printed on the circuit board antenna or the screen rear, headroom stratum, antenna below; The length of empty regions probably is between 12 ~ 15mm, and the empty regions right ends can only keep one at most and dispose ground, goes out " L " type cabling from a layback of distributing point; Produce HFS; Pull out cabling part from earth point, produce low frequency part around " L " type, both around making the second harmonic of low frequency move in the 3G scope; Form the high-frequency band of another part, obtain a reasonable antenna performance.Through these specific cabling forms, can let antenna obtain a reasonable Electro Magnetic Compatibility, especially under the situation that does not influence OTA (active test) performance, SAR can obtain reasonable performance.Distance between distributing point and the earth point needs the debug process decision, and the process of debugging also can use match circuit tuning.

This antenna reduces the SAR index from solving the Electro Magnetic Compatibility of panel computer antenna in essence, has improved the overall performance that has promoted panel computer, has improved the design of panel computer antenna.At present domestic mention the SAR scheme is fallen except reducing the OTA index, add absorbing material exactly, not only reduced the overall performance of antenna, and increased production cost, so this programme promote performance and reduce cost on have great significance.

More than be a wherein concrete implementation of the utility model, it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these conspicuous replacement forms all belong to the protection range of the utility model.

Claims

1. one kind low radiation panel computer antenna; Comprise HF link (1) that produces high-frequency signal and the audio line (2) that produces low frequency signal; It is characterized in that described HF link is an inverted-L antenna from distributing point (11) extension, described audio line is the inverted-L antenna that extends from earth point (21); Audio line is located at the HF link periphery with the semi-surrounding form, and audio line and HF link are coupled mutually and produce another low frequency signal.

2. low radiation panel computer antenna according to claim 1; It is characterized in that: described HF link and audio line are printed on the flat circuits internal circuit board; Or be affixed on the panel computer screen frame, or adopt LDS technology to be printed on the screen frame.

3. low radiation panel computer antenna according to claim 1 is characterized in that: antenna below empty regions length is 12mm ~ 15mm.