CN202197277U - Low noise tower top amplifier - Google Patents
Low noise tower top amplifier Download PDFInfo
- Publication number
- CN202197277U CN202197277U CN 201120311938 CN201120311938U CN202197277U CN 202197277 U CN202197277 U CN 202197277U CN 201120311938 CN201120311938 CN 201120311938 CN 201120311938 U CN201120311938 U CN 201120311938U CN 202197277 U CN202197277 U CN 202197277U
- Authority
- CN
- China
- Prior art keywords
- low noise
- output
- base station
- filter
- band
- 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 - Fee Related
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Abstract
The utility model discloses a low noise tower top amplifier which includes an antenna terminal, a base station terminal, and a signal receiving unit and a signal transmitting unit which are arranged between the antenna terminal and the base station terminal. The low noise tower top amplifier also includes a feed which is connected with the base station terminal via a radio frequency cable. The signal receiving unit includes an input band-pass filter, a low noise amplifier, and an output band-pass filter which are connected in order. The input terminal of the input band-pass filter is connected with the antenna terminal, and the output terminal of the output band-pass filter is connected with the feed and a band-stop filter respectively. The output terminal of the band-stop filter is connected with the antenna terminal. The low noise tower top amplifier is small in volume, light in weight, low in cost, and is high in reliability.
Description
Technical field
The utility model relates to a kind of tower amplifier, particularly a kind of low noise tower amplifier.
Background technology
Develop rapidly along with wireless communication technology; The application of various radio-frequency devices more and more widely; Wherein tower amplifier has obtained increasing concern, particularly low-loss, low noise, has highly suppressed the research emphasis that tower amplifier becomes RF application as key modules.Tower amplifier is mounted in top of tower and abuts against a reception antenna low noise amplifier afterwards; Before receiving signal entering feeder line, can amplify nearly 12dB with receiving signal; Improve uplink signal quality, improve call reliability and speech quality, enlarge the sub-district area coverage simultaneously.The tradition tower amplifier adds LNA by duplexer to be realized; Wherein duplexer is mainly realized by two or more band pass filters, suppresses with high because each band pass filter can only be realized the gating of single frequency range, so in the time will communicating by letter simultaneously to several frequency ranges; Just need a plurality of duplexer cascade operations; This conventional implementation will increase the volume and weight of tower amplifier, increase cost, also can reduce the reliability of tower amplifier simultaneously.Along with the expansion of coverage, the user increases, and telephone traffic increases, and increases with disturbing frequently, and the base station receives noise level and raises, and causes the base station received signal to noise ratio to worsen, thereby has limited the raising of base station receiving sensitivity, has reduced speech quality.
Summary of the invention
The purpose of the utility model just is to provide that a kind of volume is little, in light weight, cost is low, and the high low noise tower amplifier of reliability, can effectively address the above problem.
To achieve these goals; The technical scheme that the utility model adopts is such: the low noise tower amplifier of the utility model; Comprise antenna end, base station end and be arranged on antenna end and base station end between signal receiving unit and signal transmitter unit, also comprise loop, loop connects base station end through radio frequency cable; Said signal receiving unit comprises input tape bandpass filter, low noise amplifier and the output band pass filter that connects successively; The input of input tape bandpass filter connects antenna end, and the output of output band pass filter connects loop and band stop filter respectively, and the output of band stop filter connects antenna end.
As preferably, also comprise a permanent power control unit, an end of permanent power control unit is connected with the output of low noise amplifier, and the other end is connected with the input of band stop filter.
As preferably, connect a power supply supervision unit on the said loop.
As preferably, said input tape bandpass filter is a filter with same frequency with the output band pass filter.
Compared with prior art; The advantage of the utility model is: signal receiving unit has been realized low-loss, low noise and the high tower amplifier function that suppresses through a band stop filter and two band pass filters; Simultaneously, realized the function of traditional tower amplifier, reduced volume at two band pass filters of signal transmitter unit setting with a band stop filter; Alleviate weight, reduced cost; Improve the noise factor of base station receiving system simultaneously, improved the receptivity of base station, improved the receiving sensitivity of base station, improved coverage effect; On traditional tower amplifier, having increased permanent power control unit makes the low noise amplifier gain to regulate automatically; And can mate with the gain of following line output signal; Reach the effect of up and down power balance, thereby reduced the optimization network index, can enlarge the base station radio signal cover; Connect a power supply supervision unit on the loop, be used for power supply and alarm.
Description of drawings
Fig. 1 is the theory diagram of the utility model.
Embodiment
To combine accompanying drawing that the utility model is described further below.
Referring to Fig. 1; The low noise tower amplifier of the utility model, comprise antenna end, base station end and be arranged on antenna end and base station end between signal receiving unit and signal transmitter unit, also comprise loop; Loop connects base station end through radio frequency cable; Said signal receiving unit comprises input tape bandpass filter, low noise amplifier and the output band pass filter that connects successively, and the input of input tape bandpass filter connects antenna end, and the output of output band pass filter connects loop and band stop filter respectively; The output of band stop filter connects antenna end; Also comprise a permanent power control unit, an end of permanent power control unit is connected with the output of low noise amplifier, and the other end is connected with the input of band stop filter; Connect a power supply supervision unit on the said loop, said input tape bandpass filter is a filter with same frequency with the output band pass filter.
During work; Signal receives the input band-pass filter through signal receiving unit by antenna end; Getting into low noise amplifier through the signal that filters amplifies; Signal is through being amplified into the output band pass filter, and the signal that will receive after the amplification through loop at last is sent to base station end; The effect of loop is to realize the DC feedback to tower amplifier through radio frequency cable; Connect a power supply supervision unit on the loop, be used for power supply and alarm; Permanent power control unit is regulated according to the watt level of signal receiving unit and signal transmitter unit automatically, makes signal receiving unit and signal transmitter unit balance, reaches the purpose of the network optimization.
Claims (4)
1. low noise tower amplifier; Comprise antenna end, base station end and be arranged on antenna end and base station end between signal receiving unit and signal transmitter unit; It is characterized in that: also comprise loop; Loop connects base station end through radio frequency cable, and said signal receiving unit comprises input tape bandpass filter, low noise amplifier and the output band pass filter that connects successively, and the input of input tape bandpass filter connects antenna end; The output of output band pass filter connects loop and band stop filter respectively, and the output of band stop filter connects antenna end.
2. low noise tower amplifier according to claim 1 is characterized in that: also comprise a permanent power control unit, an end of permanent power control unit is connected with the output of low noise amplifier, and the other end is connected with the input of band stop filter.
3. low noise tower amplifier according to claim 1 is characterized in that: connect a power supply supervision unit on the said loop.
4. low noise tower amplifier according to claim 1 is characterized in that: said input tape bandpass filter is a filter with same frequency with the output band pass filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120311938 CN202197277U (en) | 2011-08-24 | 2011-08-24 | Low noise tower top amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120311938 CN202197277U (en) | 2011-08-24 | 2011-08-24 | Low noise tower top amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202197277U true CN202197277U (en) | 2012-04-18 |
Family
ID=45952176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120311938 Expired - Fee Related CN202197277U (en) | 2011-08-24 | 2011-08-24 | Low noise tower top amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202197277U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102946269A (en) * | 2012-11-15 | 2013-02-27 | 哈尔滨海能达科技有限公司 | Method and system for controlling gain of tower top amplifier, tower top amplifier and base station |
| GB2501363A (en) * | 2012-02-24 | 2013-10-23 | Radio Design Ltd | Tower Mounted Amplifier for simultaneous use in multiple frequency bands, with bandstop filter in transmit/receive path |
-
2011
- 2011-08-24 CN CN 201120311938 patent/CN202197277U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2501363A (en) * | 2012-02-24 | 2013-10-23 | Radio Design Ltd | Tower Mounted Amplifier for simultaneous use in multiple frequency bands, with bandstop filter in transmit/receive path |
| CN102946269A (en) * | 2012-11-15 | 2013-02-27 | 哈尔滨海能达科技有限公司 | Method and system for controlling gain of tower top amplifier, tower top amplifier and base station |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120418 Termination date: 20120824 |