CN208904997U - A kind of radio frequency amplifier for LTE transmitting diversity - Google Patents
A kind of radio frequency amplifier for LTE transmitting diversity Download PDFInfo
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- CN208904997U CN208904997U CN201821682549.3U CN201821682549U CN208904997U CN 208904997 U CN208904997 U CN 208904997U CN 201821682549 U CN201821682549 U CN 201821682549U CN 208904997 U CN208904997 U CN 208904997U
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Abstract
The utility model relates to a kind of radio frequency amplifiers for LTE transmitting diversity.The radio frequency amplifier includes two relatively independent signal paths: main channel and secondary channels, and main channel includes: four work devices I, four work devices II, power splitter I, power splitter II, power amplifier I, power amplifier II, low-noise amplifier I, low-noise amplifier II.Secondary channels include: four work devices III, four work devices IV, power amplifier III, power amplifier IV, low-noise amplifier III, low-noise amplifier IV.The beneficial effects of the utility model are: the transmission power of LTE equipment transmitter can be promoted by original 0.2W to 2W, the sensitivity of LTE receiver is promoted by original -93dBm to -97dBm, if the effect of the transmitting diversity along with antenna, sensitivity can achieve -100dBm.
Description
Technical field
The utility model relates to the communications fields, it particularly relates to a kind of radio frequency amplifier for LTE transmitting diversity.
Background technique
Space diversity is to realize that space length is bigger, the difference of multipath transmisstion with the random variation in space using field strength
Bigger, the correlation of received field strength is with regard to smaller.Here mentioned correlation is a statistics term, shows similar journey between signal
Degree, it is therefore necessary to determine necessary space length.By testing and counting, CCIR(Consultative Committee on International Radio (CCIR)) suggest be
Satisfied diversity is obtained, mobile unit two antenna spacing is greater than 0.6 wavelength, and is preferably selected in the surprise of 1/4 wavelength
Near several times, if even if fairly good diversity can also be played small to 1/4 wavelength by reducing antenna spacing.This example amplifier
Working frequency is 1.7GHz~2.2GHz, and corresponding 1/4 wavelength is 44mm~34mm, and such antenna distance is easily achieved.
Transmitting diversity technology is that system improves down-link performance, reduces a key technology that channel fading influences.It passes
The antenna diversity of system is to carry out receiving diversity using more antennas in receiving end (mobile station), and obtain using folding
Good signal quality.It is more difficult using receiving antenna diversity technique but since mobile station is size-constrained, and in Mobile Terminal
It is of a high price to carry out reception diversity, increases the equipment cost of user.Identical order is had been found that from theoretical and practical application
Transmitting diversity and reception diversity diversity gain having the same.Therefore in order to adapt to the requirement of present mobile communication, in base station end
Proper method is only using transmitting diversity technology.
Summary of the invention
Situation and user in view of the prior art require, and the utility model is provided to be put for the radio frequency of LTE transmitting diversity
Big device realizes the isolation of each frequency range using four work devices, is divided into two using power splitter by signal is emitted in transmission channel, to make up
Loss and promotion transmission power on power splitter and transmission line amplify transmitting signal using power amplifier,
Receiving channel offsets the Insertion Loss of receiving channel using low-noise amplifier, improves the sensitivity of complete machine.
The incoming level 23dBm of power amplifier in the utility model, it is desirable that transmission power 33dBm, therefore power is put
The gain design of big device is 10dB；Receiving channel gain design is 8dB.
To achieve the above object, used technical solution is the utility model: a kind of radio frequency for LTE transmitting diversity
Amplifier, which is characterized in that the radio frequency amplifier includes two relatively independent signal paths: main channel and secondary channels, described
Main channel includes: four work devices I, four work devices II, power splitter I, power splitter II, power amplifier I, power amplifier II, low noise
Amplifier I, low-noise amplifier II；The secondary channels include: four work devices III, four work devices IV, power amplifier III, power amplification
Device IV, low-noise amplifier III, low-noise amplifier IV；
The specific connection of the main channel are as follows: the radio-frequency receiving-transmitting port end 1T/1R of LTE equipment is connected to the ANT of four work devices I
End, the end antenna port ANT1 are connected to the end ANT of four work devices II, and the end B3TX of four work devices I is connected to the input terminal of power splitter I, function point
The input terminal of the 1 termination power amplifier I of output of device I, the end B3TX of the output four work devices II of termination of power amplifier I, four works
The end B1TX of device I is connected to the input terminal of power splitter II, the input terminal of the 1 termination power amplifier II of output of power splitter II, power
The end B1TX of the output four work devices II of termination of amplifier II,
The input, output end of low-noise amplifier I connects the end B3RX of four work devices II, four work devices I, low noise amplification respectively
The input, output end of device II connects the end B1RX of four work devices II, four work devices I respectively；
The specific connection of the secondary channels are as follows: the radio frequency reception port end 2R of LTE equipment is connected to the end ANT of four work devices III,
The end antenna port ANT2 is connected to the end ANT of four work devices IV, the input terminal of the 2 termination power amplifier III of output of power splitter I, power
The end B3TX of the output four work devices IV of termination of amplifier III, the input terminal of the 2 termination power amplifier IV of output of power splitter II, function
The end B1TX of the output four work devices IV of termination of rate amplifier IV, the input, output end of low-noise amplifier III connects four works respectively
The end B3RX of device IV, four work devices III, the input, output end of low-noise amplifier IV connect four work devices IV, four work devices III respectively
The end B1RX.
The beneficial effects of the utility model are: the transmission power of LTE equipment transmitter can be promoted by original 0.2W
To 2W, the sensitivity of LTE receiver is promoted by original -93dBm to -97dBm, if add the transmitting diversity of antenna
Effect, sensitivity can achieve -100dBm.
Detailed description of the invention
Fig. 1 is the circuit connection block diagram of the utility model.
Specific embodiment
As shown in Figure 1, a kind of radio frequency amplifier for LTE transmitting diversity, which includes two relatively only
Vertical signal path: main channel and secondary channels, main channel include: four work devices I, four work devices II, power splitter I, power splitter II, power
Amplifier I, power amplifier II, low-noise amplifier I, low-noise amplifier II.
Secondary channels include: four work devices III, four work devices IV, power amplifier III, power amplifier IV, low-noise amplifier
III, low-noise amplifier IV.
The specific connection of main channel are as follows: the radio-frequency receiving-transmitting port end 1T/1R of LTE equipment is connected to the end ANT of four work devices I, day
The end line end mouth ANT1 is connected to the end ANT of four work devices II, and the end B3TX of four work devices I is connected to the input terminal of power splitter I, power splitter I
The input terminal of 1 termination power amplifier I is exported, the output of power amplifier I terminates the end B3TX of four work devices II, four work devices I
The end B1TX is connected to the input terminal of power splitter II, the input terminal of the 1 termination power amplifier II of output of power splitter II, power amplifier
The end B1TX of II output four work devices II of termination, the input, output end of low-noise amplifier I connects four work devices II, four works respectively
The end B3RX of device I, the input, output end of low-noise amplifier II connect the end B1RX of four work devices II, four work devices I respectively.
The specific connection of secondary channels are as follows: the radio frequency reception port end 2R of LTE equipment is connected to the end ANT of four work devices III, antenna
The port end ANT2 is connected to the end ANT of four work devices IV, the input terminal of the 2 termination power amplifier III of output of power splitter I, power amplification
The end B3TX of the output four work devices IV of termination of device III, the input terminal of the 2 termination power amplifier IV of output of power splitter II, power are put
The end B1TX of the output four work devices IV of termination of big device IV, the input, output end of low-noise amplifier III connect respectively four work devices IV,
The end B3RX of four work devices III, the input, output end of low-noise amplifier IV meet the B1RX of four work devices IV, four work devices III respectively
End.
A kind of radio frequency amplifier for LTE transmitting diversity, You Sigong device I, four work devices II, four work devices III, four work devices IV,
Power splitter I, power splitter II, power amplifier I, power amplifier II, power amplifier III, power amplifier IV, low noise are put
Big device I, low-noise amplifier II, low-noise amplifier III and low-noise amplifier IV realize the transmitting point of BAND1, BAND3
Collection, B1TX refer to that BAND1 emits frequency range, and frequency 2110MHz~2170MHz, B1RX refer to that BAND1 receives frequency range, frequency
1920MHz~1980MHz, B3TX refer to that BAND3 emits frequency range, and frequency 1805MHz~1880MHz, B3RX refer to that BAND3 is received
The effect of frequency range, frequency 1710MHz~1785MHz, four work devices I, four work devices II, four work of work device III and four devices IV is exactly to be
This 4 frequency ranges of B1TX, B1RX, B3TX and B3RX provide enough isolations, so that the work of 4 frequency ranges will not influence each other.
When BAND3 transmitting, the signal that the radio-frequency receiving-transmitting port end 1T/1R of LTE equipment issues LTE equipment B3TX is added to four
The end ANT of work device I, I end B3TX of You Sigong device output, is added to power splitter I, 1 end of output of power splitter I is output to power amplifier
I input terminal is output to the end B3TX of four work devices II after the amplification of power amplifier I, and the end ANT of You Sigong device II is output to day
Line end mouth ANT1,2 end of output of power splitter I are output to the input terminal of power amplifier III, defeated after the amplification of power amplifier III
Out to the end B3TX of four work devices IV, the end ANT of You Sigong device IV is output to antenna port ANT2, realizes the transmitting diversity of BAND3.
When BAND1 transmitting, the signal that the radio-frequency receiving-transmitting port end 1T/1R of LTE equipment issues B1TX is added to four work devices I
The end ANT, the end the B1TX output of You Sigong device I, is added to power splitter II, 1 end of output of power splitter II is output to power amplifier II
Input terminal, be output to the ends B1TX of four work devices II after the amplification of power amplifier II, the end ANT of You Sigong device II is output to day
Line end mouth ANT1,2 end of output of power splitter II are output to the input terminal of power amplifier IV, defeated after the amplification of power amplifier IV
Out to the end B1TX of four work devices IV, the end ANT of You Sigong device IV is output to antenna port ANT2, realizes the transmitting diversity of BAND1.
When reception condition is achieved in that antenna port ANT1 receives B3RX signal, the end B3RX of You Sigong device II is defeated
Low-noise amplifier I is arrived out, and the end B3RX of four work devices I, You Sigong device I are added to by the amplified signal of low-noise amplifier I
The end ANT be output to the radio-frequency receiving-transmitting port end 1T/1R of LTE equipment, similarly, when antenna port ANT2 receives B3RX signal,
Low-noise amplifier III is output to by the end B3RX of four work devices IV, is added to four works by the amplified signal of low-noise amplifier III
The end B3RX of device III, the end ANT of You Sigong device III are output to the radio-frequency receiving-transmitting port end 1T/1R of LTE equipment, realize BAND3's
Receive diversity；When antenna port ANT1 receives B1RX signal, the end B1RX of You Sigong device II is output to low-noise amplifier II, warp
The end B1RX that the amplified signal of low-noise amplifier II is added to four work devices I is crossed, the end ANT of You Sigong device I is output to LTE equipment
The radio-frequency receiving-transmitting port end 1T/1R, similarly, when antenna port ANT2 receives B1RX signal, the end B1RX of You Sigong device IV is defeated
Low-noise amplifier IV is arrived out, and the end B1RX of four work devices III, You Sigong are added to by the amplified signal of low-noise amplifier IV
The end ANT of device III is output to the radio-frequency receiving-transmitting port end 1T/1R of LTE equipment, realizes the reception diversity of BAND1.
The utility model is using following some Primary Components:
Power amplifier I, power amplifier II, power amplifier III and power amplifier IV are all made of Freescal public affairs
The MW6S004NT1 of department.
Its key property has:
Working frequency: 1MHz~2000MHz
Gain: 18dB
Output power: 4W
Efficiency: 33%
Third order intermodulation inhibits: 39dB
Low-noise amplifier I, low-noise amplifier II, low-noise amplifier III and low-noise amplifier IV, are all made of
The amplifier MGA-635P8 of AVAGO company, key property have:
Gain: 18dB
Noise: 0.56dB
Export IP3:35.9dBm
Export 1dB compression point: 22dBm.
Power splitter I and power splitter II, are all made of the SKY12212 of SKYWORKS company.Its key property has:
Pass through power: 100W
Isolation: 44dB
Insertion Loss: 0.4dB.
Four work devices have 2 seed types, and connect LTE equipment is four work of work device I and four devices III of low-power, are AVAGO company
ACFM-2013, it is the CMUF4C1795- of Can Qin company that connect antenna, which is high-power four works device II and four work devices IV,
2045PA。
Claims (1)
1. a kind of radio frequency amplifier for LTE transmitting diversity, which is characterized in that the radio frequency amplifier includes two relatively independent
Signal path: main channel and secondary channels, the main channel include: four work devices I, four work devices II, power splitter I, power splitter II, function
Rate amplifier I, power amplifier II, low-noise amplifier I, low-noise amplifier II；The secondary channels include: four work devices III,
Four work devices IV, power amplifier III, power amplifier IV, low-noise amplifier III, low-noise amplifier IV；
The specific connection of the main channel are as follows: the radio-frequency receiving-transmitting port end 1T/1R of LTE equipment is connected to the end ANT of four work devices I, day
The end line end mouth ANT1 is connected to the end ANT of four work devices II, and the end B3TX of four work devices I is connected to the input terminal of power splitter I, power splitter I
The input terminal of 1 termination power amplifier I is exported, the output of power amplifier I terminates the end B3TX of four work devices II, four work devices I
The end B1TX is connected to the input terminal of power splitter II, the input terminal of the 1 termination power amplifier II of output of power splitter II, power amplifier
The end B1TX of II output four work devices II of termination,
The input, output end of low-noise amplifier I connects the end B3RX of four work devices II, four work devices I, low-noise amplifier II respectively
Input, output end connect the ends B1RX of four work devices II, four work devices I respectively；
The specific connection of the secondary channels are as follows: the radio frequency reception port end 2R of LTE equipment is connected to the end ANT of four work devices III, antenna
The port end ANT2 is connected to the end ANT of four work devices IV, the input terminal of the 2 termination power amplifier III of output of power splitter I, power amplification
The end B3TX of the output four work devices IV of termination of device III, the input terminal of the 2 termination power amplifier IV of output of power splitter II, power are put
The end B1TX of the output four work devices IV of termination of big device IV, the input, output end of low-noise amplifier III connect respectively four work devices IV,
The end B3RX of four work devices III, the input, output end of low-noise amplifier IV meet the B1RX of four work devices IV, four work devices III respectively
End.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821682549.3U CN208904997U (en) | 2018-10-17 | 2018-10-17 | A kind of radio frequency amplifier for LTE transmitting diversity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821682549.3U CN208904997U (en) | 2018-10-17 | 2018-10-17 | A kind of radio frequency amplifier for LTE transmitting diversity |
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| Publication Number | Publication Date |
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| CN208904997U true CN208904997U (en) | 2019-05-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109088665A (en) * | 2018-10-17 | 2018-12-25 | 天津七二通信广播股份有限公司 | A kind of implementation method of the radio frequency amplifier for LTE transmitting diversity |
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2018
- 2018-10-17 CN CN201821682549.3U patent/CN208904997U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109088665A (en) * | 2018-10-17 | 2018-12-25 | 天津七二通信广播股份有限公司 | A kind of implementation method of the radio frequency amplifier for LTE transmitting diversity |
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