CN2760863Y

CN2760863Y - TD-SCDMA handset panel with RF transmitting, receiving circuit

Info

Publication number: CN2760863Y
Application number: CNU200420110390XU
Authority: CN
Inventors: 密剑丽
Original assignee: BEIHAO COMMUNICATION ELECTRONIC Co Ltd SHANGHAI
Current assignee: BEIHAO COMMUNICATION ELECTRONIC Co Ltd SHANGHAI
Priority date: 2004-11-26
Filing date: 2004-11-26
Publication date: 2006-02-22
Anticipated expiration: 2014-11-26

Abstract

The utility model relates to a handset panel with a radio frequency (RF) transmitting and receiving circuit, particularly to a time-division synchronous code division multiple access (abbreviation: TD-SCDMA) handset panel with an RF transmitting and receiving circuit. The utility model comprises an RF transmitting circuit and an RF receiving circuit which are both covered under a metal mask cover. The technical problem that an RF transmitting circuit and an RF receiving circuit of the existing handset panel are provided with metal mask covers respectively is solved by structure, the handset layout space of an RF part is decreased, and manufacturing cost is saved.

Description

TD SDMA mobile phone board with radio-frequency transmissions, receiving circuit

Technical field:

The utility model relate to have radio-frequency transmissions, the mobile phone board of receiving circuit, particularly a kind of TD SDMA with radio-frequency transmissions, receiving circuit (is called for short: TD-SCDMA) mobile phone board.

Background technology:

The design of current phone plate integrates all things in every way, (be called for short: RF) circuit all is crowded together closely for simulation, numeral and radio frequency, the space that is used for separating problem area separately is very little, can't guarantee has enough isolation between them, metallic shield (shielding case) just must be arranged in this case, it keeps apart a plurality of circuit blocks, particularly RF circuit part metallic shield in the RF zone, has been kept apart to radiation and other circuit block of other circuit block RF the radio-frequency (RF) energy shielding fully effectively to the interference of RF.Certainly, metallic shield itself also has problems, and (for example: self cost and assembly cost are all very expensive; The irregular metallic shield of profile is difficult to during fabrication guarantee high accuracy that rectangle or square-shaped metal radome make the components and parts layout be subjected to certain limitation again; Metallic shield is unfavorable for components and parts replacing and fault location; Because metallic shield must be welded on the ground, must keep a suitable distance with components and parts, so also will occupy the expensive real estate of printed circuit board (PCB)), but the effect of metallic shield is conspicuous.

At present in order to solve TD-SCDMA mobile phone RF section layout, as much as possible high power RF amplifier (is called for short: HPA) and low noise amplifier (abbreviation: LNA) keep apart, common way is that radiating circuit and receiving circuit respectively cover a metallic shield, though radiating circuit and receiving circuit have been isolated effectively like this, have following two drawbacks at least:

One, taken the space of mobile phone board preciousness.The physical space of mobile phone is limited, and the existence of two metallic shields has inevitably strengthened the arrangement space of RF part, thereby mobile phone board can not be fully used.

Two, improved production cost.Two metallic shields need be distinguished the die sinking making, and cost of manufacture will improve.

The utility model content:

The purpose of this utility model provides a kind of TD SDMA mobile phone board with radio-frequency transmissions, receiving circuit, the radio-frequency transmissions circuit and the receiving circuit that solve existing mobile phone board have the technical problem of metallic shield respectively, reduce the mobile phone arrangement space of RF part, saved cost of manufacture.

For solving the problems of the technologies described above, the utility model is achieved in that

A kind of TD SDMA (be called for short: TD-SCDMA) mobile phone board, comprise radio-frequency transmissions circuit and radio-frequency (RF) receiving circuit, it is characterized in that: (be called for short: RF) circuit part all covers under the metallic shield radio frequency.

Have some heat radiation through holes on this metallic shield.

Mat said structure, the utility model compared with prior art have following advantage:

The utility model only has a metallic shield, has saved the arrangement space of RF part greatly.Because metallic shield must be welded on the ground, must keep a suitable distance with components and parts, so also will occupy the expensive real estate of mobile phone board, reduce by a metallic shield, for limited mobile phone board physical space, saved arrangement space, make the mobile phone board space be fully used.And, also reduced the manufacturing cost of metallic shield.

Description of drawings:

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the structural representation of metallic shield in the utility model.

Embodiment:

The utility model has been integrated advanced TDMA/TDD system based on TD-SCDMA.TDMA is the time-division multiple access, is a kind of phone in action and radio base interstation carry out the numerical digit transmission to wireless signal technology.Distribute to several passages at the TDMA midband with less chronomere, make the several callings can public passages and can be not interfering with each other, use the network of TDMA to distribute 6 time slots for each frequency channel.TDD is the time-division duplex, is a kind of duplex technology that radio channel was divided by the time, and it allows down link to work in the part in frame period, and up link is then in the work remaining time in frame period.The transmitting-receiving that is to say TD-SCDMA is not simultaneous, and transmitting-receiving can the phase mutual interference, thus in this motion radiating circuit and receiving circuit shared a metallic shield, specific design as shown in Figure 1:

Among the figure, (be called for short: LDO), the entire RF part has all covered on this metallic shield 11 times to have antenna switch module 12 (AntennaSwitchIC), slider 13 (Isolator), PA power amplifier 14, receiver 15 (Receiver), reflector 16 (Transmitter), low-dropout regulator 17 in the metallic shield 11 on the mobile phone board 1.

Fig. 2 is the structural representation of metallic shield 11 in the utility model, top hole is heat radiation through hole 111, since the peculiar technology of TD-SCDMA need not high power RF amplifier (be called for short: HPA) and low noise amplifier (abbreviation: LNA) fully keep apart, so can realize radiating circuit and receiving circuit shared a metallic shield.

Claims

1, a kind of TD SDMA (be called for short: TD-SCDMA) mobile phone board, comprise radio-frequency transmissions circuit and radio-frequency (RF) receiving circuit, it is characterized in that: (be called for short: RF) circuit part all covers under the metallic shield radio frequency.

2, TD SDMA mobile phone board according to claim 1 is characterized in that: have some heat radiation through holes on this metallic shield.