CN100344189C - 3G mobile communication network base station up-down power amplifying march-past combination unit - Google Patents
3G mobile communication network base station up-down power amplifying march-past combination unit Download PDFInfo
- Publication number
- CN100344189C CN100344189C CNB2004100886381A CN200410088638A CN100344189C CN 100344189 C CN100344189 C CN 100344189C CN B2004100886381 A CNB2004100886381 A CN B2004100886381A CN 200410088638 A CN200410088638 A CN 200410088638A CN 100344189 C CN100344189 C CN 100344189C
- Authority
- CN
- China
- Prior art keywords
- duplexer
- power
- relay
- base station
- unit
- 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
Links
Images
Abstract
The present invention relates to a 3G numeric move honeycomb communication network base station up-down power amplifying march-past combination unit. A down link sequentially comprises the following orders: a base station, a relay 1, a duplexer 1, an adjustable attenuator, a power amplification unit, a duplexer 2, a relay 2, a duplex filter 2, a duplex filter 1, a thunder and lightning protective device, and a receiving and transmitting common antenna. An up link sequentially comprises the following orders: an up signal from an antenna feedback opening, the thunder and lightning protective device, the duplex filter 1, a bypass switch K1, a low noise amplifier, a bypass switch K2, the duplex filter 2, the relay 2, the duplexer 2, the duplexer 1, the relay 1 and the base station. The present invention can improve the signal-to-noise ration of an up signal. Simultaneously, the output power of a down signal is enhanced. The attenuation of a signal from a receiving and transmitting machine in a communication cable is thoroughly compensated. The seamless coverage and the region exceeding coverage in the area of the base station are realized. The receiving sensitivity and the conversation level are improved. When the amplifier has a fault, the present invention can automatically use the bypass, which leads the base station to still work.
Description
Technical field
The present invention relates to the digital mobile cellular communication apparatus.
Background technology
3G (Third Generation) Moblie network (3G) is meant WCDMA, CDMA2000, and the digital mobile communication network of standard systems such as SD-SCDMA, the honeycomb mode is still adopted in its networking.The subject matter that existing mobile radio communication exists comprises:
The one, the transmitting power and the receiving sensitivity that how to improve the base station are difficult problems that realizes always.This mainly is because the active device of base station receiving system and the thermal noise that the warm-up movement in the radio frequency conductor causes.As: the received branch unit in cable in the receiving loop (feeder line, wire jumper etc.) and the base station, high-frequency amplifier etc.The introducing of these thermal noises has reduced the signal to noise ratio (S/N) that system receives, thereby has limited the raising of base station receiving sensitivity, has reduced speech quality.
The 2nd, do not detect automatically and bypass circuit in the uplink and downlink amplifying unit, in case amplifier breaks down, can cause whole base station to work.
Summary of the invention
The purpose of this invention is to provide a kind of 3G mobile communication network base station up-down power amplifying march-past combination unit, can improve the signal to noise ratio of upward signal, increase the power output of downstream signal simultaneously, the fully decay of signal in telecommunication cable of compensation base station transceiver, uplink and downlink signals is amplified simultaneously, realize the seamless covering of base station area and get over area overlapping, and improved user's receiving sensitivity and conversation grade indirectly, and can between the base station, realize switching smoothly; All have bypass circuit in its uplink and downlink amplifying unit, when amplifier breaks down, but auto by pass still can be worked the base station, is unlikely to interrupt.
The object of the present invention is achieved like this: a kind of base station up-down power amplifying march-past combination unit based on 3G digital mobile cellular communications network, comprise up amplifying unit and descending amplifying unit, up amplifying unit and descending amplifying unit are connected and constitute up link and down link between base station transceiver and the duplexer, it is characterized in that:
Descending amplifying unit mainly is made up of adjustable attenuator, power amplification unit, control unit, duplexer 1, duplexer 2, relay 1, relay 2, and up amplifying unit mainly is made up of lightning protection equipment, bidirectional filter and low noise amplifying unit; Bidirectional filter is made up of duplexer filter 1, duplexer filter 2;
The circuit structure of down link is: base station transceiver is connected with duplexer 1 through relay 1, duplexer 1 is connected with the input of adjustable attenuator, the output of adjustable attenuator is connected with the input of power amplification unit, the output of power amplification unit is connected with duplexer 2, duplexer 2 is connected with relay 2, relay 2 is connected with duplexer filter 2 in the up amplifying unit, duplexer filter 2 is connected with duplexer filter 1, and duplexer filter 1 is connected with duplexer through lightning protection equipment;
Control unit is made up of comparator and control box, comparator is connected across between the input and output of power amplification unit, the output of comparator is connected with control box, control box is connected with relay 1, relay 2, the break-make of contacts in the control box control relay 1, relay 2, comparator is to electric current, power, the temperature of power amplification unit and compare judgement:
When comparator judges that the electric current, power, temperature of power amplification unit are all in setting range, power amplification unit is in normal operating conditions, comparator is exported first signal and is given control box, being connected between being connected between control box turn-on relay 1 and the duplexer 1, relay 2 and the duplexer 2; Control box disconnects being connected between relay 1 and the relay 2;
Electric current, power, the temperature of judging power amplification unit when comparator exceed setting range, power amplification unit is in the fail operation state, comparator output secondary signal is given control box, control box disconnects being connected between being connected between relay 1 and the duplexer 1, relay 2 and the duplexer 2, being connected between control box turn-on relay 1 and the relay 2;
The circuit structure of up link is: duplexer is connected with duplexer filter 1 through lightning protection equipment; Duplexer filter 1 is connected with the input of low noise amplifying unit, the output of low noise amplifying unit is connected with duplexer filter 2, duplexer filter 2 is connected with relay 2 in the descending amplifying unit, relay 2 is connected with duplexer 2, duplexer 2 is connected with duplexer 1, and duplexer 1 is connected with base station transceiver through relay 1;
Described low noise amplifying unit is made up of low noise amplifier, by-pass switch K1, by-pass switch K2, detection controller, described by-pass switch K1 is connected between the input of duplexer filter 1 and low noise amplifier, described by-pass switch K2 is connected between the output and duplexer filter 2 of low noise amplifier, and cross-over connection has the detection controller between described by-pass switch K1 and the by-pass switch K2; Detect the operating state that controller is used to detect low noise amplifier:
When low noise amplifier is in the normal condition operating state: detect between the input of controller with by-pass switch K1 and low noise amplifier and connect, connect between the output with by-pass switch K2 and low noise amplifier, give duplexer filter 2 after the upward signal that duplexer filter 1 is exported amplifies through low noise amplifier:
When low noise amplifier is in the failure condition operating state: disconnect between the input of detection controller with by-pass switch K1 and low noise amplifier, disconnect between the output with by-pass switch K2 and low noise amplifier, simultaneously by-pass switch K1 and by-pass switch K2 are connected, make the upward signal of duplexer filter 1 output directly give duplexer filter 2.
When the electric current of power amplification unit greater than 3 amperes or power output greater than 150 watts or ambient temperature less than 70 degrees centigrade, comparator is exported first signal and is given control box;
When the electric current of power amplification unit smaller or equal to 3 amperes or power output smaller or equal to 150 watts or ambient temperature more than or equal to 70 degrees centigrade, comparator output secondary signal is given control box.
Described comparator has four: comparator 1 is used for the forward power of detection power amplifying unit; Comparator 2 is used for the backward power of detection power amplifying unit; Comparator 3 is used for the temperature of detection power amplifying unit; Comparator 4 is used for the electric current of detection power amplifying unit.
Described power amplification unit is made up of three stage power amplifier cascades, cross-over connection has the power feedback circuit between the output of the input of first order power amplifier and third level power amplifier, this Feedback of Power circuit is used to reduce the input power of three stage power amplifiers, thereby improves the linear index of power amplifier.
Be connected with between described base station transceiver and the relay 1 and power up box, power up box and be used for positive 28 volts of direct currents are introduced feeder line.
Be connected with between described duplexer filter 2 and the relay 2 and move back electric box, move back electric box and be used for becoming 12 volts of direct currents to supply with low noise amplifier the voltage transitions of base station feed line.
Described up amplifying unit is installed in the top of transmitting and receiving signal tower.
The present invention has following positive beneficial effect: the casacade multi-amplifier in the signal transmission helps improving the influence of system's thermal noise, the noise of multistage amplification system depends primarily on the noise factor of the first order, up amplifying unit of the present invention is installed in the top of transmitting and receiving signal tower, very near apart from antenna, prevented the decay of signal in telecommunication cable, help reducing the noise of receiving system, thereby improve the signal to noise ratio of upward signal and the sensitivity of base station receiving system, the present invention adopts the control method of back-off, improve transmitting power, improve the linear index of power amplifier, adopt the U.S. to produce the continuous three grades of amplifications of LDMOS GaAs power amplifier tube, every grade is improved gain 4dB, can improve gain 12dB altogether, and signal cover expansion that therefore can the base station is original is twice above;
For improving the linear quality of three grades of amplifications, before power amplification unit, increase adjustable attenuator, original digital signal is decayed to a fixed value, this circuit is by the adjustment of adjustable attenuator, input power fixedly is reduced to 10dB, so linear index such as third order intermodulation coefficient can improve on the original basis.For preventing to influence base station original system function after the power amplifier fault, the present invention has also set up bypass circuit.When detecting power amplifier when breaking down; Automatically start two relays and form bypass.Base station system is unlikely interruption.
The core component that is installed in the up amplifying unit of cat head is a low noise amplifier; The characteristic of auto by pass when it has fault, bypass also will be activated during power down.Respectively be provided with a duplexer filter at the two ends of low noise amplifier, guaranteed directly to enter antenna through two duplexer filters by the downstream signal that the base station is come.Utilize this two-duplexer circuit, can repack existing antenna into duplexer, not be used on the cat head of small size very and add antenna in addition; Cat head space and installation workload have greatly been saved.
Description of drawings
Fig. 1 is the whole connection layout of uplink and downlink amplifying unit of the present invention and antenna, power-supply system;
Fig. 2 is a schematic block circuit diagram of the present invention;
Fig. 3 is the circuit structure diagram of descending amplifying unit and down link among Fig. 2;
Fig. 4 is the circuit structure diagram of up amplifying unit and up link among Fig. 2;
Fig. 5 is the control logic schematic diagram of control unit of the present invention;
Fig. 6 is a power amplifier when being in operate as normal, the connection diagram between relay, the duplexer;
Fig. 7 is power amplifier work when breaking down, the connection diagram between relay, the duplexer;
When Fig. 8 is the low noise amplifier operate as normal, the connection diagram between by-pass switch and the low noise amplifier;
Fig. 9 is low noise amplifier work when breaking down, the connection diagram between by-pass switch and the low noise amplifier.
Embodiment
Please refer to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, the basic principle of down link of the present invention is:
Downstream signal path and flow process: power up box 1 general+28V direct current and introduce feeder line, the downstream signal of base station enters relay 1 via powering up the A port of box 1 by relay 1, when normal operating conditions, downstream signal enters front end duplexer 1 through the B of relay 1 port, then through adjustable attenuator, the ingoing power amplifying unit, arrive rear end duplexer 2 then, E port by relay 2 enters relay 2 again, export the duplexer filter 2 that enters the up amplifying unit from the F port of relay 2, directly enter duplexer filter 1 by duplexer filter 2, through the feedback mouth of duplexer filter 1 to duplexer.The effect of duplexer is to make to transmit and received signal merges to a port, and can realize that receiving and transmitting signal isolates.
By the comparator in the control unit power amplification unit is compared, if power amplification unit breaks down, comparator is the control box of start-up control unit, directly is communicated with the C port of relay 1 and the D port of relay 2, allows uplink and downlink signals directly pass through in the short circuit mode.
Please refer to Fig. 3, power amplification unit is made up of three stage power amplifier cascades, cross-over connection has the power feedback circuit between the output of the input of first order power amplifier and third level power amplifier, this Feedback of Power circuit is used to reduce the input power of three stage power amplifiers, thereby improves the linear index of power amplifier.The sort circuit method of attachment claims " back-off method " again.The Feedback of Power circuit can adopt prior art.
The back-off method is both to have improved transmitting power, improve a kind of effective ways of power amplifier linearity again---when the input power of power amplifier is reduced 1dB, the third order intermodulation coefficient of amplifier improves 3～4dB, this in circuit the design more high-power, but improve the method for power amplifier linear index when realizing with the mode that reduces input power, be called the back-off method;
Power amplifier adopts U.S. product LDMOS GaAs power amplifier tube, and by continuous three grades of amplifications, every grade is improved gain 4dB, can improve gain 12dB altogether, and signal cover expansion that therefore can the base station is original is twice above;
Because base station transmit signals not only will be expanded the coverage area after amplifier amplifies, and must reach network optimization effect; Original signal amplifies in the stack of power amplifier process if leave, and both may form positive feedback, in use burns out power amplifier, also may cause wave distortion.For preventing to burn out power amplification unit, improve the linear quality of three grades of amplifications, before amplifying circuit, increase adjustable attenuator, original digital signal is decayed to a fixed value, this circuit is by the adjustment of adjustable attenuator, input power fixedly is reduced to 10dB, so linear index such as third order intermodulation coefficient can improve on the original basis.
Please refer to Fig. 3, for preventing to influence base station original system function after power amplifier from breaking down, the present invention has also set up bypass circuit.
This bypass circuit is made of jointly comparator, control box and relay 1, relay 2:
In comparator, be provided with the CPU testing circuit of the electric current that is used for comparison power amplification unit two ends, power, temperature.This CPU testing circuit can adopt prior art.
In the present embodiment, comparator has four: comparator 1 is used for the forward power of detection power amplifying unit; The signal end 1 of comparator 1 connects the forward power reference value.Comparator 2 is used for the backward power of detection power amplifying unit; The signal end 2 of comparator 2 connects the backward power reference value.Comparator 3 is used for the temperature of detection power amplifying unit; The signal end 3 jointing temp reference values of comparator 3.Comparator 4 is used for the electric current of detection power amplifying unit, and the signal end 4 of comparator 4 connects the quiescent current reference value.Be placed on the electric current≤3A of unit when power;
Or power output≤150W;
Or ambient temperature 〉=70 ℃
More than three kinds of conditions, can detect power amplifier when any one takes place and break down; And starting relay 1 and relay 2 formation bypasses, the basic power output of power amplification unit is 200W, power output is the difference of power amplification unit forward power and backward power, please refer to Fig. 6, in the present embodiment, control box can be made of a transformer, the elementary winding of this transformer and the coupling of the output of comparator, the coil coupling of this Secondary winding of transformer and relay 1 and relay 2, the A of relay 1, connect a normally-closed contact, the A of relay 1 between the B port, connect a normally opened contact, the E of relay 2 between the C port, connect a normally-closed contact between the F port, the D of relay 2, connect a normally opened contact between the F port
Comparator detects to be judged when power amplifier is working properly: comparator is exported first signal and is given control box, transformer in the control box makes the coil losing electricity of relay 1 and relay 2, the normally opened contact of relay 1 and relay 2 is opened, the normally-closed contact closure, conducting between the A of relay 1, the B port disconnects between A, the C port at this moment; Conducting between the E of relay 2, the F port disconnects between D, F port; The path of downstream signal is: base station transceiver → relay 1 → duplexer 1 → adjustable attenuator → power amplification unit → duplexer 2 → relay 2 → duplexer filter 2 → duplexer filter 1 → lightning protection equipment → duplexer.
When detecting the work of judgement power amplifier, comparator breaks down, comparator output secondary signal is given control box, transformer in the control box gets the coil of relay 1 and relay 2, the normally opened contact closure of relay 1 and relay 2, normally-closed contact is opened, conducting between the A of relay 1, the C port disconnects between A, the B port at this moment; Conducting between the D of relay 2, the F port disconnects between E, the F port; The path of downstream signal is:
Base station transceiver → relay 1 → relay 2 → duplexer filter 2 → duplexer filter 1 → lightning protection equipment → duplexer; Just with the power amplification unit bypass, thereby when power amplifier breaks down, can not cause whole base station system paralysis.
Please refer to Fig. 4; the basic principle of up link of the present invention is: the path of upward signal is: the upward signal that comes from the antenna feed mouth enters duplexer filter 1 through lightning protection equipment; K1 enters low noise amplifier through by-pass switch; enter the F port of relay 2 again through by-pass switch K2; E port by relay 2 enters duplexer 2 then; directly enter duplexer 1 then, enter in the base station along relay 1 again.
Up amplifying unit is installed in the top of transmitting and receiving signal tower, the below of duplexer, very near apart from antenna, prevented the decay of signal in telecommunication cable, help reducing the noise of receiving system, thereby improve the signal to noise ratio of upward signal and the sensitivity of base station receiving system.
The core component of up amplifying unit is a low noise amplifier; The characteristic of auto by pass when it has fault, bypass also will be activated during power down, and low noise amplifier is powered by base station feed line, perhaps directly powers by direct current cables.
The basic principle of ascending power amplifying unit is: the upward signal that duplexer receives enters duplexer filter 1 through lightning protection equipment earlier; enter by-pass switch K1 again by duplexer filter 1; under normal circumstances be in " conducting " state between this by-pass switch K1 and the low noise amplifier; upward signal passes through low noise amplifier; improve signal to noise ratio; enter duplexer filter 2 through by-pass switch K2 again; its power supply gives the feedback mode opposite with the descending power amplifying unit, is to become positive 12V direct current to return to low noise amplifier the base station feed line voltage transition by moving back electric box.
When the low noise amplifier operate as normal, upstream signal path is: present mouthful A port → base station transceiver of the B port → relay 1 of E port → duplexer 2 → duplexer 1 → relay 1 of the F port → relay 2 of the upward signal → lightning protection equipment → duplexer filter 1 → by-pass switch K1 → low noise amplifier → by-pass switch K2 → duplexer filter 2 → relay 2 that comes from duplexer.
When low noise amplifier breaks down: detect fault by detecting controller, start the bypass circuit of by-pass switch K1 and K2, make upward signal directly be conducting to duplexer filter 2, without low noise amplifier from duplexer filter 1; Upstream signal path is: present mouthful A port → base station transceiver of the B port → relay 1 of E port → duplexer 2 → duplexer 1 → relay 1 of the F port → relay 2 of the upward signal → lightning protection equipment → duplexer filter 1 → by-pass switch K1 → detection controller → by-pass switch K2 → duplexer filter 2 → relay 2 that comes from duplexer.Thereby when low noise amplifier breaks down, can not cause whole base station system paralysis.
Detect controller and can adopt prior art, during enforcement, by-pass switch K1, K2 can realize with relay: please refer to Fig. 8, connect a normally-closed contact between the G port of by-pass switch K1 and the J port, connect a normally opened contact between G port and the H port.Connect a normally-closed contact between the L port of by-pass switch K2 and the N port, connect a normally opened contact between L port and the M port.
When operate as normal, conducting between the G port of by-pass switch K1 and the J port; Disconnect between G port and the H port.Conducting between the L port of by-pass switch K2 and the N port disconnects between L port and the M port.Upward signal enters low noise amplifier through the normally-closed contact of by-pass switch K1, and the normally-closed contact through by-pass switch K2 enters duplexer filter 2 again.
Please refer to Fig. 9, when low noise amplifier breaks down: detect controller and detect fault, send the signal of telecommunication and give the coil that makes by-pass switch K1, its normally-closed contact is opened, the normally opened contact closure, be to disconnect between the G port, J port of by-pass switch K1, conducting between G port, the H port disconnects between the L port of by-pass switch K2 and the N port, conducting between M port and the N port, the detected controller of the M port of the H port by-pass switch K2 of by-pass switch K1 is communicated with, and low noise amplifier is by bypass.
The function of up amplifying unit of the present invention is: consider at cat head directly to be subjected to thunderbolt, so be provided with lightning protection equipment in up cat head amplifying unit inside; When running into thunderbolt, extra-high pressure will import powerful electric current underground by lightning protection equipment.Because up amplifying unit is placed on cat head, supply power mode is to give by feeder line; The present invention is provided with and moves back electric box, moves back electric box and the alternating current of base station feed line can be separated, converts to+the 12V direct current, powers to low noise amplifier; Power up box and move back electric box and can adopt prior art.Respectively be provided with a duplexer filter at the two ends of low noise amplifier, guaranteed directly to enter antenna through two duplexer filters by the downstream signal that the base station is come.Its advantage is that existing antenna is repacked into duplexer, not be used on the cat head of small size to add antenna in addition very much; Cat head space and installation workload have greatly been saved.Duplexer filter can be made up of transmitting filter and receiving filter, also can be made of dielectric filter.
Claims (7)
1. 3G mobile communication network base station up-down power amplifying march-past combination unit, comprise up amplifying unit and descending amplifying unit, up amplifying unit and descending amplifying unit are connected and constitute up link and down link between base station transceiver and the duplexer, it is characterized in that:
Descending amplifying unit mainly is made up of adjustable attenuator, power amplification unit, control unit, duplexer 1, duplexer 2, relay 1, relay 2, and up amplifying unit mainly is made up of lightning protection equipment, bidirectional filter and low noise amplifying unit; Bidirectional filter is made up of duplexer filter 1, duplexer filter 2;
The circuit structure of down link is: base station transceiver is connected with duplexer 1 through relay 1, duplexer 1 is connected with the input of adjustable attenuator, the output of adjustable attenuator is connected with the input of power amplification unit, the output of power amplification unit is connected with duplexer 2, duplexer 2 is connected with relay 2, relay 2 is connected with duplexer filter 2 in the up amplifying unit, duplexer filter 2 is connected with duplexer filter 1, and duplexer filter 1 is connected with duplexer through lightning protection equipment;
Control unit is made up of comparator and control box, comparator is connected across between the input and output of power amplification unit, the output of comparator is connected with control box, control box is connected with relay 1, relay 2, the break-make of contact in control box control relay 1, the relay 2, comparator compares judgement to electric current, power, the temperature of power amplification unit:
When comparator judges that the electric current, power, temperature of power amplification unit are all in setting range, power amplification unit is in normal operating conditions, comparator is exported first signal and is given control box, being connected between being connected between control box turn-on relay 1 and the duplexer 1, relay 2 and the duplexer 2; Control box disconnects being connected between relay 1 and the relay 2;
Electric current, power, the temperature of judging power amplification unit when comparator exceed setting range, power amplification unit is in the fail operation state, comparator output secondary signal is given control box, control box disconnects being connected between being connected between relay 1 and the duplexer 1, relay 2 and the duplexer 2, being connected between control box turn-on relay 1 and the relay 2;
The circuit structure of up link is: duplexer is connected with duplexer filter 1 through lightning protection equipment; Duplexer filter 1 is connected with the input of low noise amplifying unit, the output of low noise amplifying unit is connected with duplexer filter 2, duplexer filter 2 is connected with relay 2 in the descending amplifying unit, relay 2 is connected with duplexer 2, duplexer 2 is connected with duplexer 1, and duplexer 1 is connected with base station transceiver through relay 1;
Described low noise amplifying unit is made up of low noise amplifier, by-pass switch K1, by-pass switch K2, detection controller, described by-pass switch K1 is connected between the input of duplexer filter 1 and low noise amplifier, described by-pass switch K2 is connected between the output and duplexer filter 2 of low noise amplifier, and cross-over connection has the detection controller between described by-pass switch K1 and the by-pass switch K2; Detect the operating state that controller is used to detect low noise amplifier:
When low noise amplifier is in the normal condition operating state: detect between the input of controller with by-pass switch K1 and low noise amplifier and connect, connect between the output with by-pass switch K2 and low noise amplifier, give duplexer filter 2 after the upward signal that duplexer filter 1 is exported amplifies through low noise amplifier;
When low noise amplifier is in the failure condition operating state: disconnect between the input of detection controller with by-pass switch K1 and low noise amplifier, disconnect between the output with by-pass switch K2 and low noise amplifier, simultaneously by-pass switch K1 and by-pass switch K2 are connected, make the upward signal of duplexer filter 1 output directly give duplexer filter 2.
2. 3G mobile communication network base station up-down power amplifying march-past combination unit as claimed in claim 1, it is characterized in that: when the electric current of power amplification unit greater than 3 amperes or power output greater than 150 watts or ambient temperature less than 70 degrees centigrade, comparator is exported first signal and is given control box; When the electric current of power amplification unit smaller or equal to 3 amperes or power output smaller or equal to 150 watts or ambient temperature more than or equal to 70 degrees centigrade, comparator output secondary signal is given control box.
3. 3G mobile communication network base station up-down power amplifying march-past combination unit as claimed in claim 1 is characterized in that: described comparator has four: comparator 1 is used for the forward power of detection power amplifying unit; Comparator 2 is used for the backward power of detection power amplifying unit; Comparator 3 is used for the temperature of detection power amplifying unit; Comparator 4 is used for the electric current of detection power amplifying unit.
4. 3G mobile communication network base station up-down power amplifying march-past combination unit as claimed in claim 1, it is characterized in that: described power amplification unit is made up of three stage power amplifier cascades, cross-over connection has the power feedback circuit between the output of the input of first order power amplifier and third level power amplifier, this Feedback of Power circuit is used to reduce the input power of three stage power amplifiers, thereby improves the linear index of power amplifier.
5. 3G mobile communication network base station up-down power amplifying march-past combination unit as claimed in claim 1 is characterized in that: be connected with between described base station transceiver and the relay 1 and power up box, power up box and be used for positive 28 volts of direct currents are introduced feeder line.
6. 3G mobile communication network base station up-down power amplifying march-past combination unit as claimed in claim 1, it is characterized in that: be connected with between described duplexer filter 2 and the relay 2 and move back electric box, move back electric box and be used for becoming 12 volts of direct currents to supply with low noise amplifier the voltage transitions of base station feed line.
7. 3G mobile communication network base station up-down power amplifying march-past combination unit as claimed in claim 1 is characterized in that: described up amplifying unit is installed in the top of transmitting and receiving signal tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100886381A CN100344189C (en) | 2004-11-10 | 2004-11-10 | 3G mobile communication network base station up-down power amplifying march-past combination unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100886381A CN100344189C (en) | 2004-11-10 | 2004-11-10 | 3G mobile communication network base station up-down power amplifying march-past combination unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1774092A CN1774092A (en) | 2006-05-17 |
| CN100344189C true CN100344189C (en) | 2007-10-17 |
Family
ID=36760811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100886381A Expired - Fee Related CN100344189C (en) | 2004-11-10 | 2004-11-10 | 3G mobile communication network base station up-down power amplifying march-past combination unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100344189C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101425833B (en) * | 2008-12-09 | 2013-03-13 | 成都福兰特电子技术有限公司 | Base station signal optimization system and method thereof |
| US9270335B2 (en) * | 2013-08-23 | 2016-02-23 | Electro-Motive Diesel, Inc. | Receive attenuation system for trainline communication networks |
| CN107370471B (en) * | 2017-06-29 | 2020-06-05 | 中国电子科技集团公司第四十一研究所 | PXI bus programmable amplifier/attenuator and calibration method thereof |
| CN114258099A (en) * | 2022-01-28 | 2022-03-29 | Oppo广东移动通信有限公司 | Method for isolating power amplifier PA fault, terminal equipment and storage medium |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997041643A1 (en) * | 1996-04-29 | 1997-11-06 | Radio Design Innovation Ab | Adaptive radio receiver apparatus |
| US5815805A (en) * | 1993-08-06 | 1998-09-29 | Motorola, Inc. | Apparatus and method for attenuating an undesired signal in a radio transceiver |
| WO2000033491A1 (en) * | 1998-11-30 | 2000-06-08 | Nokia Networks Oy | Test facility for transceiver station |
| CN1283008A (en) * | 1999-07-29 | 2001-02-07 | 厦门华侨电子企业有限公司 | Direct amplifying station for mobile communication at 350 MH2 band and its antenna installation method |
| CN1394093A (en) * | 2001-06-22 | 2003-01-29 | 杜方 | Intelligent distributed antenna system of microcellular base station for digital mobile communication |
| CN1411631A (en) * | 2000-01-25 | 2003-04-16 | Isco国际股份有限公司 | CDMA communication system having highly selective filter |
-
2004
- 2004-11-10 CN CNB2004100886381A patent/CN100344189C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5815805A (en) * | 1993-08-06 | 1998-09-29 | Motorola, Inc. | Apparatus and method for attenuating an undesired signal in a radio transceiver |
| WO1997041643A1 (en) * | 1996-04-29 | 1997-11-06 | Radio Design Innovation Ab | Adaptive radio receiver apparatus |
| WO2000033491A1 (en) * | 1998-11-30 | 2000-06-08 | Nokia Networks Oy | Test facility for transceiver station |
| CN1283008A (en) * | 1999-07-29 | 2001-02-07 | 厦门华侨电子企业有限公司 | Direct amplifying station for mobile communication at 350 MH2 band and its antenna installation method |
| CN1411631A (en) * | 2000-01-25 | 2003-04-16 | Isco国际股份有限公司 | CDMA communication system having highly selective filter |
| CN1394093A (en) * | 2001-06-22 | 2003-01-29 | 杜方 | Intelligent distributed antenna system of microcellular base station for digital mobile communication |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1774092A (en) | 2006-05-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100957417B1 (en) | Apparatus for power amplification using switching structure in a wireless communication system and thereof control method | |
| CN1067536A (en) | Make the method and apparatus of power amplifier oblique ascension | |
| KR100450934B1 (en) | A high efficiency stage-switching cdma power amplifier | |
| CN100344189C (en) | 3G mobile communication network base station up-down power amplifying march-past combination unit | |
| CN102098007B (en) | Mismatch protection device for radio frequency (RF) amplifying circuit and method thereof | |
| CN1684531A (en) | GSM/CDMA two-way duplex tower top amplifier | |
| CN201307846Y (en) | Protection circuit for protecting power amplifier | |
| CN1147179C (en) | Subscriber station with duplex antenna amplifier | |
| CN111294086A (en) | Gain control method of communication system and communication system | |
| WO2009039738A1 (en) | A method, device and base station system for base station compatible with high gain tower mounted amplifier | |
| CN200956583Y (en) | WCDMA tower top amplifier | |
| CN107863986B (en) | Integrated power amplifier module structure | |
| CN1254461A (en) | Power control of RF signals with booster module | |
| CN201222736Y (en) | Digital radio frequency zooming system | |
| CN101350660A (en) | Digital RF far-drawing system and method for controlling standby carrier channel thereof | |
| CN2805221Y (en) | Amplifier | |
| CN2624561Y (en) | Base station power amplifier | |
| CN1348319A (en) | Apparatus and method for monitoring radio communication terminal signal power | |
| CN201509192U (en) | Tower top amplifier current window alarm circuit | |
| CN211791508U (en) | Communication system | |
| CN1284389C (en) | Mobile communication double frequency indoor signal optical fibre distribution system | |
| CN219611784U (en) | Amplifier with half-duplex automatic receiving and transmitting function for interphone | |
| CN117320136B (en) | Energy-saving control method and system for radio frequency unit in wireless communication base station | |
| CN200973084Y (en) | Main line amplifier | |
| CN103312905A (en) | OFDM (Orthogonal Frequency Division Multiplexing) technology alternating current and direct current power line industrial field telephone network capable of broadcasting call and communication method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: BEIERXIN SCIENCE CO., LTD., SHENZHEN CITY Free format text: FORMER OWNER: ZHENG ZHANGCHUN Effective date: 20081031 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20081031 Address after: Guangdong province Shenzhen city Nanshan District high tech Industrial Park, Shenzhen production base in East E201 Patentee after: SHENZHEN BELLSENT INTELLIGENT SYSTEM CO., LTD. Address before: Room 20, building 502, Qianhai garden, Nanshan District, Shenzhen, Guangdong Patentee before: Zheng Changchun |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071017 Termination date: 20181110 |