CN201349223Y - Novel antenna for mobile phone - Google Patents

Abstract

The utility model relates to a novel antenna for a mobile phone, in particular to a GPS or FM mobile phone using a ceramic antenna in the field of mobile phones. The antenna is integrated with a circuit shield, which is arranged on the upmost end of the mainboard of the mobile phone, and the plane of the reference ground of the antenna is connected with the shield and the earth terminal of the mainboard. The antenna mode used in the mobile phone has extremely high reliability; as for the mounting of a GPS antenna and other similar antennas, the antenna not only has a compact structure and can be easily integratively assembled but also has excellent receiving performance; and for similar ceramic antennas, the antenna is a high-performance antenna structure.

Description

A kind of new antenna that is used for mobile phone

Technical field

The present invention relates to a kind of new antenna that is used for mobile phone.

Background technology

Development along with mobile phone technique, the mobile phone of built-in GPS is also more and more on mobile phone, but with respect to traditional professional GPS navigation instrument, design GPS difficulty is bigger on the mobile phone, mainly be because the size restrictions of mobile phone, requirement meeting to antenna is higher, and receptivity reasonably designs and selects antenna just extremely important in order to obtain relatively preferably.

Better performances in the various antennas of GPS is used flat ceramic antenna the most generally at present, and this antenna is made in microstrip line on the dielectric-slab of high-k, realizes the antenna of oval circular polarization.Little band ceramic antenna mainly contains two kinds of active antenna and passive antennas, active antenna is to increase pcb board and low noise amplifier circuit on the basis of passive antenna, reach the purpose that improves antenna gain, the impact of performance is better, but the connection of active antenna need use private cable to connect, and cost is improved.And that the advantage of passive antenna is a cost is lower, is connected with structure but difficulty is the fixing of antenna, has very high reliability for the performance that guarantees antenna must be able to guarantee the antenna installation.The performance index of ceramic antenna are not only relevant with size itself, also have very big getting in touch with relative ground level.In mobile phone, must consider the design and installation on plane relatively when using ceramic antenna.Need be below ceramic antenna on the conventional mobile phone pcb board of design, use the radio frequency cable to be connected with mainboard again signal, make the cost that has increased mobile phone in this way, connector and cable, and PCB fixing causes insecure problem easily.If directly use steel plate also to need welding or screw fixed installation trouble, the bad antenna performance that influences of consistency.Has the high shortcoming of cost from above-mentioned our traditional as can be seen active antenna, and use passive antenna as according to traditional mounting means, the installation site of ceramic antenna is that difficulty is bigger, orientation of installing and reliability requirement are all than higher, therefore the antenna that is difficult to guarantee GPS in the production of reality relative position and performance on every mobile phone is in full accord, and receptivity need increase reflecting surface below antenna in order to obtain preferably, has increased the complexity of cost and processing technology.

Summary of the invention

In order to address these problems, the invention provides a kind of new antenna structure that is used for mobile phone, adopted antenna holder structure following and the shielded rack one.

In similar terminals such as mobile phone, for fear of interference, the radome that all can use metal strengthens shield effectiveness and improves circuit performance.In the general design, GPS circuit and antenna all can be designed into the top of terminal, need metal ground to guarantee antenna performance below the antenna, so we consider the shielded rack on antenna ground and the mobile phone board is made of one and realize.In this scheme, the metallic shield frame need be extended toward the top of mainboard, place the cell phone mainboard top, because the structure of own and shielded rack one, relative position is fixed, and has guaranteed the consistency of performance of antenna in last installation.The earth terminal of shielded rack and mainboard well contacts, and can be used as the part of antenna, makes the reference horizontal plane of manufacturing of antenna connect with above-mentioned earth terminal, improves the receptivity of antenna on largely.

The invention has the beneficial effects as follows that use such antenna to have extreme high reliability, antenna performance can access maximum assurance, and has the beneficial effect of being convenient to produce installation in mobile phone.Antenna removes the structure compactness, is easy to outside the integrated assembling, also has the symmetrical hemispheric beam of very good circle, good wide-angle circular polarization and impedance matching property, and it is a kind of antenna of function admirable that GPS is used.

Description of drawings

The support schematic diagram of Fig. 1 present embodiment antenna;

Fig. 2 present embodiment antenna face schematic diagram;

Fig. 3 present embodiment antenna side schematic view;

Fig. 4 present embodiment aerial head schematic diagram.

Reference numeral: 1. circuit shielded rack.

Embodiment

Adopt incorporate design on the structural design, as shown in Figure 1, antenna holder and shielded rack are made of one, have the precision height, produce reliable advantage.As can be seen from Figure 2, the support and the shielded rack on the mainboard of ceramic antenna are one, convenient processing and assurance size.Fig. 3 is the end view of entire antenna support.Fig. 4 as can be seen, antenna holder can be according to physical dimension, that as much as possible ground level is done is bigger, increase to the reflection of signal from but antenna obtains better receptivity.

Claims (3)

1, a kind of new antenna that is used for mobile phone comprises circuit shielded rack and antenna, it is characterized in that: antenna and circuit shielded rack one.

2, new antenna according to claim 1 is characterized in that: the circuit shielded rack places cell phone mainboard topmost.

3, new antenna according to claim 1 is characterized in that: the reference horizontal plane of manufacturing of antenna is connected with the ground of shielded rack and mainboard.

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