CN201393251Y - Mobile terminal main board - Google Patents
Mobile terminal main board Download PDFInfo
- Publication number
- CN201393251Y CN201393251Y CN200920069743U CN200920069743U CN201393251Y CN 201393251 Y CN201393251 Y CN 201393251Y CN 200920069743 U CN200920069743 U CN 200920069743U CN 200920069743 U CN200920069743 U CN 200920069743U CN 201393251 Y CN201393251 Y CN 201393251Y
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- CN
- China
- Prior art keywords
- radome
- portable terminal
- receiving filter
- mobile terminal
- match circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model discloses a mobile terminal main board, comprising a shielding cover which is uniformly arranged on a printing circuit board, a diplexer, a low-noise amplifier, a receiving filter, a first matching circuit used for being connected with the diplexer and the low-noise amplifier, and a second matching circuit used for being connected with the receiving filter and the low-noise amplifier, wherein the receiving filter is exposed out of the shielding cover. The mobile terminal main board is not restricted by the height and shape of the shielding cover, can optimize the single-tone noise immunity performance of the radio frequency circuit of a mobile terminal receiver, and simultaneously ensures the stability of the mobile terminal structure and the electrical property. The mobile terminal main board has simple structure, is easy to operate, and can greatly lower the research and manufacture cost of the mobile terminal.
Description
Technical field
The utility model relates to a kind of portable terminal mainboard.
Background technology
The single-tone immunity to interference is that receiver correctly receives the ability of a signal when having a tone signal on the given frequency deviation of allocated channel frequency, is the important indicator of judging the portable terminal receiver performance.Along with development of electronic technology, the integrated degree of portable terminal mainboard chip is more and more higher, and size is more and more littler.Like this, brought certain degree of difficulty for the optimization of single-tone immunity to interference performance index.
Portable terminal mainboard of the prior art comprises printed circuit board (PCB), all is arranged on antenna, radio circuit, baseband circuit and radome on the described printed circuit board (PCB); Described radio circuit comprises duplexer, respectively receiver circuit and the transmitter circuitry that is connected with described duplexer; Described receiver circuit comprises low noise amplifier, receiving filter, frequency converter and low pass filter and is used to connect first match circuit of described duplexer and described low noise amplifier, is used to connect second match circuit of described receiving filter and described low noise amplifier.
Described radome is the metal shell that covers on printed circuit board (PCB), demonstration module and the camera, is used to prevent electromagnetic interference.The radio circuit of portable terminal and the electronic devices and components in the peripheral circuit thereof all cover in the radome in the prior art.This structure has following defective: when the wavelength of this portable terminal work radio frequency during for the integral multiple of this radome size, can cause these portable terminal single-tone immunity to interference performance index obviously to descend, this has just proposed requirements at the higher level to the design of the size of radome; When the distance of components and parts in this radome and the radio circuit is very near, can produce the electromagnetic coupled disturbing effect, can cause single-tone immunity to interference performance index obviously to descend equally, when the external form of portable terminal approaches, can influence the receptivity of portable terminal greatly like this.
At present, can adopt the radio frequency matching circuit of adjusting receiver, the absorbing material parts perhaps are set on printed circuit board (PCB) optimize single-tone immunity to interference performance index.But these modes all can increase the complexity of device layout design, the cost that has increased the exploitation of portable terminal mainboard and made.
The utility model content
The purpose of this utility model provides a kind of portable terminal mainboard of single-tone immunity to interference performance index preferably that has, and uses this portable terminal mainboard, and radome size and portable terminal external form thickness are not all had designing requirement.
A kind of portable terminal mainboard, comprise the radome that all is arranged on the printed circuit board (PCB), duplexer, low noise amplifier, receiving filter, be used to connect first match circuit of described duplexer and described low noise amplifier, be used to connect second match circuit of described receiving filter and described low noise amplifier, it is characterized in that: described receiving filter is exposed to outside the described radome.
Described first match circuit is exposed to outside the described radome.Described second match circuit is exposed to outside the described radome.
Portable terminal mainboard provided by the utility model is not subjected to the restriction of radome height and shape, all can optimize the single-tone immunity to interference performance index of described portable terminal receiver radio frequency circuit, has guaranteed the stability of mobile terminal structure and electric property simultaneously.The utility model is simple in structure, easy operating, the cost that can reduce the portable terminal research and development greatly and make.
Description of drawings
Fig. 1 is the utility model radio frequency structure schematic diagram.
Embodiment
As shown in Figure 1, a kind of portable terminal mainboard, comprise the radome that all is arranged on the printed circuit board (PCB), duplexer, and low noise amplifier (Low Noise Amplifier, LNA), receiving filter, be used to connect first match circuit of described duplexer and described low noise amplifier, be used to connect second match circuit of described receiving filter and described low noise amplifier, it is characterized in that: described receiving filter is exposed to outside the described radome.Like this, can prevent the electromagnetic field of described receiving filter generation and the electromagnetic field generation electromagnetic coupling effect of described radome inside, and cause single-tone immunity to interference performance index to descend.Described radio circuit and described baseband circuit can utilize single-chip to realize, for example the model of QUALCOMM company production is the single-chip of QSC60XX.Like this, can make the motherboard circuit integrated level height of portable terminal on the one hand, reduce the size of portable terminal mainboard, reduce the cost of components and parts and printed circuit board (PCB).Reduce the research and development difficulty, reduced the R﹠D cycle.On the other hand, single-chip can reduce power consumption of mobile terminals to a certain extent.
Described radome is provided with and corresponding first through hole in described receiving filter position.
Described first through hole is consistent with the shape of described receiving filter on described printed circuit board (PCB).
Described radome is provided with and corresponding first breach in described receiving filter position.
Described first breach is consistent with the shape of described receiving filter on described printed circuit board (PCB).
Described first match circuit is exposed to outside the described radome.
Described radome is provided with and corresponding second through hole in the described first match circuit position.
Described second through hole is consistent with the shape of described first match circuit on described printed circuit board (PCB).
Described radome is provided with and corresponding second breach in the described first match circuit position.
Described second breach is consistent with the shape of described first match circuit on described printed circuit board (PCB).
Described second match circuit is exposed to outside the described radome.
Described radome is provided with and the corresponding third through-hole in the described second match circuit position.
Described third through-hole is consistent with the shape of described second match circuit on described printed circuit board (PCB).
Described radome is provided with and corresponding the 3rd breach in the described second match circuit position.
Described the 3rd breach is consistent with the shape of described second match circuit on described printed circuit board (PCB).
Because described second match circuit and the position of described receiving filter on described printed circuit board (PCB) are very close, described first through hole or described first breach and described third through-hole or the 3rd breach can be merged, promptly utilize a bigger through hole and breach with described receiving filter and described second match circuit together expose with described radome outside.
Further, described radome is a single layer structure.This conductor layer can be made with metal material, for example can adopt materials such as Alpaka, foreign copper-nickel alloy, stainless steel, tin-coated steel to make.
Further, described radome is the double-decker that is provided with the non-conductor layer.Described non-conductor layer is made of plastic, and described conductor layer is that the spraying conductive paint forms on described non-conductor layer.Like this, can reduce the material cost of described radome.It will be understood by those skilled in the art that in manufacture process, can also can on described non-conductor layer, the part corresponding not spray conductive paint hollowing out with described through hole or the pairing part of breach on the described non-conductor layer with described through hole.
Dotted line as shown in Figure 1 illustrates the profile of described radome, and promptly circuit and the components and parts thereof in the dotted line scope are coated in the described radome; Extraneous circuit of dotted line and components and parts thereof are exposed to outside the described radome.
Under identical test condition, to in the prior art based on the portable terminal mainboard of the QSC6010 of Qualcomm company platform, at 1013MHz, 384MHz and 777MHz frequency range the single-tone immunity to interference is tested respectively, the surplus minimum value that obtains is respectively: 1dB, 0.5dB and-1dB; To the portable terminal mainboard of the utility model based on the QSC6010 of Qualcomm company platform, at 1013MHz, 384MHz and 777MHz frequency range channel the single-tone immunity to interference to be tested respectively, the surplus minimum value that obtains is respectively: 2dB, 1.5dB and 1dB.Thus, can find out that the utility model can improve this portable terminal single-tone immunity to interference performance index, thereby improve the receiver performance of portable terminal.
Above-described embodiment only is used to illustrate technological thought of the present utility model and characteristics, and its purpose is to enable those skilled in the art to understand content of the present utility model and implement according to this.The utility model is not limited to use in portable terminal, also can be applicable to other electronic equipments, as card of surfing Internet.All equivalent variations or modifications of making according to spirit that the utility model disclosed and essence thereof all still belong to protection range of the present utility model.
Claims (10)
1, a kind of portable terminal mainboard, comprise the radome that all is arranged on the printed circuit board (PCB), duplexer, low noise amplifier, receiving filter, be used to connect first match circuit of described duplexer and described low noise amplifier, be used to connect second match circuit of described receiving filter and described low noise amplifier, it is characterized in that: described receiving filter is exposed to outside the described radome.
2, portable terminal mainboard as claimed in claim 1, it is characterized in that: described radome is provided with and corresponding first through hole in described receiving filter position, and described first through hole is consistent with the shape of described receiving filter on described printed circuit board (PCB).
3, portable terminal mainboard as claimed in claim 1, it is characterized in that: described radome is provided with and corresponding first breach in described receiving filter position, and described first breach is consistent with the shape of described receiving filter on described printed circuit board (PCB).
4, portable terminal mainboard as claimed in claim 1 is characterized in that: described first match circuit is exposed to outside the described radome.
5, portable terminal mainboard as claimed in claim 4, it is characterized in that: described radome is provided with and corresponding second through hole in the described first match circuit position, and described second through hole is consistent with the shape of described first match circuit on described printed circuit board (PCB).
6, portable terminal mainboard as claimed in claim 4, it is characterized in that: described radome is provided with and corresponding second breach in the described first match circuit position, and described second breach is consistent with the shape of described first match circuit on described printed circuit board (PCB).
7, as each described portable terminal mainboard of claim 1 to 6, it is characterized in that: described second match circuit is exposed to outside the described radome.
8, portable terminal mainboard as claimed in claim 7, it is characterized in that: described radome is provided with and the corresponding third through-hole in the described second match circuit position, and described third through-hole is consistent with the shape of described second match circuit on described printed circuit board (PCB).
9, portable terminal mainboard as claimed in claim 7, it is characterized in that: described radome is provided with and corresponding the 3rd breach in the described second match circuit position, and described the 3rd breach is consistent with the shape of described second match circuit on described printed circuit board (PCB).
10, portable terminal mainboard as claimed in claim 1 is characterized in that: described radome is single layer structure or the double-decker that is provided with the non-conductor layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920069743U CN201393251Y (en) | 2009-03-31 | 2009-03-31 | Mobile terminal main board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920069743U CN201393251Y (en) | 2009-03-31 | 2009-03-31 | Mobile terminal main board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201393251Y true CN201393251Y (en) | 2010-01-27 |
Family
ID=41600072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920069743U Expired - Lifetime CN201393251Y (en) | 2009-03-31 | 2009-03-31 | Mobile terminal main board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201393251Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102447760A (en) * | 2011-11-07 | 2012-05-09 | 上海华勤通讯技术有限公司 | Mobile terminal |
-
2009
- 2009-03-31 CN CN200920069743U patent/CN201393251Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102447760A (en) * | 2011-11-07 | 2012-05-09 | 上海华勤通讯技术有限公司 | Mobile terminal |
| CN102447760B (en) * | 2011-11-07 | 2015-08-26 | 上海华勤通讯技术有限公司 | Mobile terminal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Luo Dachen Document name: Patent certificate of utility model |
|
| CX01 | Expiry of patent term |
Granted publication date: 20100127 |
|
| CX01 | Expiry of patent term |