CN202888359U - Reception branch low-noise-coefficient diplexer - Google Patents
Reception branch low-noise-coefficient diplexer Download PDFInfo
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- CN202888359U CN202888359U CN201220446097.5U CN201220446097U CN202888359U CN 202888359 U CN202888359 U CN 202888359U CN 201220446097 U CN201220446097 U CN 201220446097U CN 202888359 U CN202888359 U CN 202888359U
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Abstract
The utility model provides a reception branch low-noise-coefficient diplexer. An antenna ANT1 is connected with a low-noise amplification module 1 through a transmission signal cavity and a reception signal 1 cavity; and a low-noise amplification module 2 is directly connected with an antenna ANT2. The beneficial effects of the reception branch low-noise-coefficient diplexer are that a reception signal 2 cavity is omitted, and the low-noise amplification module 2 is connected with the ANT2; and according to conservative estimation, the noise coefficient of a reception branch 2 is improved by over 0.5dB, and the size of a 1-transmition-2-reception duplexer is reduced by over 30%.
Description
Technical field
The utility model relates to Wireless communication transceiver system duplexer association area, mainly is a kind of receiving branch low-noise factor duplexer.
Background technology
Wireless base station and repeater, the radio reception devices such as intelligent AP much can adopt the MIMO antenna technology at present, and the utility model is done lower explanation as an example of modal 12 receipts duplexer example.In 1 now the most frequently used 2 receipts system, the structure of duplexer as shown in Figure 1.In Fig. 1, can see, antenna I (ANT1) signal can be through cavity and the reception signal I cavity of transmitting, then processing through entering LNA module I after receiving signal I cavity, and antenna II (ANT2) receipts are not sent out, to the received signal, process through sending into LNA module II behind reception signal 2 cavitys, noise factor according to system calculates formula, as follows: F=F1+ (F2-1)/G1+ (F3-1)/G1G2+ (F4-1)/G1G2G3+.....(F1 is the noise factor of the first order, F2 is the 2nd grade noise factor ...), (G1 is the gain of the first order, and G2 is the gain of the second level ...).
The utility model content
The purpose of this utility model is just in order to overcome the deficiency of above-mentioned technology, and a kind of receiving branch low-noise factor duplexer is provided.
The utility model solves the technical scheme that its technical problem adopts: this receiving branch low-noise factor duplexer, and the antenna I is connected with LNA module I by the cavity that transmits, reception signal I cavity; LNA module II directly is connected with the antenna II.
The effect that the utility model is useful is: receive signal 2 cavitys and be cancelled, LNA module II links to each other with ANT2, and conservative estimation receiving branch 2 noise factors improve more than the 0.5dB, and 12 volume of receiving duplexer reduces more than 30%.
Description of drawings
Fig. 1 is that 12 commonly used of the utility model is received duplexer and LNA module diagram;
Fig. 2 is that 12 of the utility model low-noise reception branch road is received duplexer and LNA module diagram.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, reach for example below in conjunction with accompanying drawing, the utility model is further elaborated.Should be appreciated that described hereinly for example only in order to explaining the utility model, and be not used in restriction the utility model.
Such as Fig. 2 shelves, this receiving branch low-noise factor duplexer, the antenna I by the cavity that transmits, receive signal I cavity and be connected with LNA module I; LNA module II directly is connected with the antenna II.In the wireless access base station, receive in the duplexer for 12 of intelligent AP etc. the repeater, receives cavity with one the tunnel and cancel, and directly connects the LNA module.
The above is only to be preferred implementation of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvement and modification, these improvement and modification also should be considered as protection range of the present utility model.
Claims (1)
1. receiving branch low-noise factor duplexer is characterized in that: the antenna I by the cavity that transmits, receive signal I cavity and be connected with LNA module I; LNA module II directly is connected with the antenna II.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220446097.5U CN202888359U (en) | 2012-09-04 | 2012-09-04 | Reception branch low-noise-coefficient diplexer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220446097.5U CN202888359U (en) | 2012-09-04 | 2012-09-04 | Reception branch low-noise-coefficient diplexer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202888359U true CN202888359U (en) | 2013-04-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220446097.5U Expired - Lifetime CN202888359U (en) | 2012-09-04 | 2012-09-04 | Reception branch low-noise-coefficient diplexer |
Country Status (1)
| Country | Link |
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| CN (1) | CN202888359U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102820895A (en) * | 2012-09-04 | 2012-12-12 | 三维通信股份有限公司 | Receiving branch low-noise coefficient duplexer |
-
2012
- 2012-09-04 CN CN201220446097.5U patent/CN202888359U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102820895A (en) * | 2012-09-04 | 2012-12-12 | 三维通信股份有限公司 | Receiving branch low-noise coefficient duplexer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130417 |