CN212785355U - Wireless repeater with 350MHz uplink output power and large downlink output power - Google Patents
Wireless repeater with 350MHz uplink output power and large downlink output power Download PDFInfo
- Publication number
- CN212785355U CN212785355U CN202021883032.8U CN202021883032U CN212785355U CN 212785355 U CN212785355 U CN 212785355U CN 202021883032 U CN202021883032 U CN 202021883032U CN 212785355 U CN212785355 U CN 212785355U
- Authority
- CN
- China
- Prior art keywords
- uplink
- downlink
- signal
- duplexer
- preamplifier
- 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.)
- Active
Links
Images
Abstract
The utility model discloses a 350MHz goes upward wireless repeater that output power is big down output power is little, including being used for receiving the first duplexer that the ascending signal that the basic station direction was sent and will descend signal transmission to the basic station direction, be used for going upward the second duplexer that signal transmission received the descending signal of intercom direction to the intercom direction, go upward preamplifier, go upward the wave filter, go upward high-power amplifier, descending preamplifier, descending wave filter and the little power amplifier down. The utility model has large uplink output, and ensures that the base station can receive the interphone calling uplink signal amplified and transmitted by the repeater; although the downlink maximum output is small, the received base station signal is very weak, and the amplified base station signal is still far smaller than the maximum output capability.
Description
Technical Field
The utility model discloses repeater technical field, concretely relates to 350MHz goes upward wireless repeater that output power is big down output power is little.
Background
The repeater station is composed of an antenna, a radio frequency duplexer, a low noise amplifier, a frequency mixer, an electrically tunable attenuator, a filter, a power amplifier and other components or modules, and comprises an uplink amplification link and a downlink amplification link. The basic principle of the work is as follows: a forward antenna (donor antenna) is used for receiving a downlink signal of a base station into a repeater, a low-noise amplifier is used for amplifying a useful signal, a noise signal in the signal is suppressed, and the signal-to-noise ratio (S/N) is improved; then down-converting to intermediate frequency signal, filtering by filter, intermediate frequency amplifying, frequency shifting up-converting to radio frequency, amplifying by power amplifier, and transmitting to mobile station by backward antenna (retransmission antenna); at the same time, the mobile station uplink signal is received by a backward antenna and processed by an uplink amplifying link along the reverse path: i.e. via a low noise amplifier, a down converter, a filter, a mid-amplifier, an up converter, a power amplifier, and then transmitted to the base station. Thereby achieving two-way communication between the base station and the mobile station.
The wireless repeater of the conventional talkback frequency band has small uplink output power and large downlink output power, because the conventional talkback base station (relay station) is a single base station system, the wireless repeater is close to the base station, the outdoor signal is strong, and the areas needing to be covered indoors are mostly underground parking lots, underground shopping malls and the like; the requirement of the coverage area is large, so that the uplink output power of the wireless repeater is small, and the downlink output power is feasible and necessary. However, the police 350-million wireless system is a multi-base-station multi-channel cluster system, and the using environment is a remote district place, namely a duty station; outdoor signals are already weak (-80-100 dBm), and indoor coverage area is not large. At this time, if the wireless repeater with the conventional function is used, the talkback base station cannot receive the signal sent by the wireless repeater because the maximum output of the uplink of the wireless repeater is small; although the maximum downlink output is large, it is not feasible because the received base station signal is very weak and the actual output downlink signal after amplification is much smaller than the maximum output value.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a 350MHz reverse wireless repeater that goes upward output power is big, and output power is little down.
In order to achieve the above object, the utility model provides a following technical scheme:
the utility model relates to a 350MHz wireless repeater that the big downlink output power of output power goes upward, it is including being used for receiving the ascending signal that the basic station direction was sent and sending the first duplexer of downlink signal to the basic station direction, being used for sending the ascending signal to the intercom direction and receiving the second duplexer of downlink signal of intercom direction, going upward preamplifier, going upward wave filter, going upward high-power amplifier, descending preamplifier, descending wave filter and descending little power amplifier; the first duplexer is in communication connection with the uplink preamplifier to send an uplink signal to the uplink preamplifier, the uplink preamplifier is in communication connection with the uplink filter, the uplink filter is in communication connection with the uplink high-power amplifier, the uplink high-power amplifier is in communication connection with the second duplexer, the second duplexer is in communication connection with the downlink preamplifier, the downlink preamplifier is in communication connection with the downlink filter, and the downlink filter is in communication connection with the downlink low-power amplifier.
Preferably, the power of the uplink high-power amplifier is 2-10w, and the power of the downlink low-power amplifier is 0.1-1 w.
Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect:
the utility model has large uplink output, and ensures that the base station can receive the interphone calling uplink signal amplified and transmitted by the repeater; although the downlink maximum output is small, the received base station signal is very weak, and the amplified base station signal is still far smaller than the maximum output capability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic block diagram of the present invention;
description of the labels in the schematic: 1-a first duplexer; 2-an upstream preamplifier; 3-an upstream filter; 4-an uplink high-power amplifier; 5-a second diplexer; 6-a downstream preamplifier; 7-a downlink filter; 8-downlink small power amplifier.
Detailed Description
For further understanding of the present invention, the present invention will be described in detail with reference to the following examples, which are provided for illustration of the present invention but are not intended to limit the scope of the present invention.
Referring to fig. 1, the present embodiment relates to a 350MHz wireless repeater with large uplink output power and small downlink output power, which includes a first duplexer 1, an uplink preamplifier 2, an uplink filter 3, an uplink high-power amplifier 4, a second duplexer 5, a downlink preamplifier 6, a downlink filter 7, and a downlink low-power amplifier 8; the first duplexer 1 is in communication connection with an uplink preamplifier 2, the uplink preamplifier 2 is in communication connection with an uplink filter 3, the uplink filter 3 is in communication connection with an uplink high-power amplifier 4, the uplink high-power amplifier 4 is in communication connection with a second duplexer 5, the second duplexer 5 is in communication connection with a downlink preamplifier 6, the downlink preamplifier 6 is in communication connection with a downlink filter 7, and the downlink filter 7 is in communication connection with a downlink low-power amplifier 8. The first duplexer 1 and the second duplexer 5 adopt a duplexer developed by shenzhen natural microelectronics ltd with model number SAFEA2G60MA0F0AR15, and the upstream preamplifier 2 and the downstream preamplifier 6 adopt OE1081 amplifiers developed by guangzhou bayonet electronics ltd; the upward filter 3 and the downward filter 7 adopt S210-1AW filters developed by Beijing Aikei scientific electronic technology, the upward high-power amplifier 4 adopts ATG-2000 series amplifiers developed by xi' an Antai electronic technology, and the downward low-power amplifier 8 adopts OI series power amplifiers developed by Beijing Happy science and technology.
The first duplexer 1 is used for receiving an uplink signal sent from a base station direction and sending the uplink signal to an uplink preamplifier 2, the uplink preamplifier 2 receives the signal sent from the first duplexer 1 and then amplifies the uplink signal and sends the amplified signal to an uplink filter 3, the uplink filter 3 carries out clutter filtering on the amplified uplink signal and sends the uplink signal to an uplink high-power amplifier 4, the power adopted by the uplink high-power amplifier 4 is 2w, the uplink signal is amplified to the high-power level and then sent to a second duplexer 5, the second duplexer 5 sends the uplink amplified signal to a mobile station direction antenna, the mobile station direction antenna radiates the same signal as the uplink signal to cover a service area of the repeater and receives a downlink signal sent by the mobile station in the service area and sends the downlink signal to a downlink preamplifier 6, the downlink preamplifier 6 receives the downlink signal from the second duplexer 5, amplifies the downlink signal and sends the amplified downlink signal to the downlink filter 7, the downlink filter performs clutter filtering on the downlink signal and sends the downlink signal to the downlink small power amplifier 8, the power adopted by the downlink small power amplifier 8 is 0.1w, the downlink small power amplifier 8 amplifies the downlink signal to a low-power level and sends the amplified downlink signal to the first duplexer 1, and the first duplexer 1 sends the received downlink signal to the base station directional antenna receiving base station.
The 350MHz wireless system in the utility model is a multi-base station multi-channel cluster system, and the using environment is a place of a remote area, a duty station; in the environment, outdoor signals are weak (-80-100 dBm), indoor coverage area is not required, output power of uplink signals is high, and the base station can receive interphone calling uplink signals amplified and transmitted by the repeater; although the maximum output power of the downlink signal is small, the amplified base station signal is still far less than the maximum output capability of the base station signal because the received base station signal is very weak.
The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is merely an embodiment of the present invention, and the actual structure is not limited thereto. Therefore, those skilled in the art should understand that they can easily and effectively implement the present invention without departing from the spirit and scope of the present invention.
Claims (2)
1. A wireless repeater with large uplink output power and small downlink output power of 350MHz is characterized by comprising a first duplexer, a second duplexer, an uplink preamplifier, an uplink filter, an uplink high-power amplifier, a downlink preamplifier, a downlink filter and a downlink low-power amplifier, wherein the first duplexer is used for receiving an uplink signal sent from a base station direction and sending a downlink signal to the base station direction; the first duplexer is in communication connection with the uplink preamplifier to send uplink signals to the uplink preamplifier, the uplink preamplifier is in communication connection with the uplink filter, the uplink filter is in communication connection with the uplink high-power amplifier, the uplink high-power amplifier is in communication connection with the second duplexer, the second duplexer is in communication connection with the downlink preamplifier, the downlink preamplifier is in communication connection with the downlink filter, the downlink filter is in communication connection with the downlink low-power amplifier, and the downlink low-power amplifier is in communication connection with the first duplexer to send downlink signals to the first duplexer.
2. The wireless repeater according to claim 1, wherein the power of the uplink high power amplifier is 2-10w, and the power of the downlink low power amplifier is 0.1-1 w.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021883032.8U CN212785355U (en) | 2020-09-02 | 2020-09-02 | Wireless repeater with 350MHz uplink output power and large downlink output power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021883032.8U CN212785355U (en) | 2020-09-02 | 2020-09-02 | Wireless repeater with 350MHz uplink output power and large downlink output power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212785355U true CN212785355U (en) | 2021-03-23 |
Family
ID=75057694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021883032.8U Active CN212785355U (en) | 2020-09-02 | 2020-09-02 | Wireless repeater with 350MHz uplink output power and large downlink output power |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212785355U (en) |
-
2020
- 2020-09-02 CN CN202021883032.8U patent/CN212785355U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102271344B (en) | Method for enhancing transmission distance for frequency shift repeater in time division duplex relay transmission mode | |
| CN107484237A (en) | A kind of unbalanced Adaptable System of uplink downlink and its method | |
| CN201639582U (en) | Repeater solving mobile object coverage | |
| CN212785355U (en) | Wireless repeater with 350MHz uplink output power and large downlink output power | |
| CN103595497A (en) | System and method for utilizing delay forwarding to shield cell phone signals | |
| CN203608213U (en) | System for shielding cell phone signals by utilization of delay forwarding | |
| CN105743525A (en) | Apparatus and method for controlling power in a communication system | |
| CN201699704U (en) | Three-frequency wireless repeater | |
| CN215734275U (en) | High-isolation universal 5G repeater | |
| CN205566272U (en) | Device of power in control communications system | |
| CN106411386B (en) | Full-band repeater | |
| CN201045755Y (en) | Mobile communication radio frequency repeater | |
| CN201781489U (en) | Wireless repeater with function of eliminating feedback interference signals | |
| CN2819659Y (en) | Direct WCDMA broadcast station of mobile telecommunication | |
| CN212413435U (en) | Indoor microdistribution system of 5G mobile communication | |
| KR101514985B1 (en) | Energy dispersion consuming type hybrid radio communications repeater | |
| CN215818144U (en) | High-gain talkback wireless repeater | |
| CN201536367U (en) | Micro-power repeater | |
| CN213585711U (en) | 5GNR time division synchronous signal amplification system and amplifier thereof | |
| KR100938488B1 (en) | Remote optical unit | |
| CN200980076Y (en) | A TD-SCDMA mobile communication wireless repeater | |
| CN215734271U (en) | Small-size 5G repeater | |
| CN215734274U (en) | Universal 5G repeater | |
| CN209897033U (en) | Automatic gain signal enhancer | |
| CN201742570U (en) | Bidirectional outdoor radio frequency unit used for time division duplex mobile communication system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |