CN1411296A - Base station receiver and transmitter radio frequency front end route merging apparatus - Google Patents
Base station receiver and transmitter radio frequency front end route merging apparatus Download PDFInfo
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- CN1411296A CN1411296A CN 01126903 CN01126903A CN1411296A CN 1411296 A CN1411296 A CN 1411296A CN 01126903 CN01126903 CN 01126903 CN 01126903 A CN01126903 A CN 01126903A CN 1411296 A CN1411296 A CN 1411296A
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- base station
- mixer
- radio frequency
- cavity filter
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Abstract
This invention discloses a RF front end channel combiner of base station sender and receiver including at least two vacuum cavity filters, two tuning control units, input of each vacuum cavity filter is used as the input of the channel combiner transmitting emitting signals of sends from base station system, output of each vacuum cavity filter connected in parallel together via coaxial cable as the output of the channel combiner; each tuning control unit controls the corresponding vacuum cavity filter which has the character of high quality factor, little insertion loss of single filter as well as channel combiner made up of many vacuum cavity filters.
Description
Technical field
The present invention relates to mobile communcations system, more specifically refer to a kind of base station receiver and transmitter radio frequency front end route merging apparatus.
Background technology
In wireless telecommunication system, base station receiver and transmitter radio frequency front end is usually used the signal emission and is closed road, emission reception duplex, diversity receiving technology, base station receiver and transmitter radio frequency front end is asked for an interview shown in Figure 1, the radiofrequency signal of sender (is example with two) is by mixer synthetic a tunnel, launched by transmit receive antenna Y1 through behind the duplexer, the signal that this antenna receives is again through giving main receiver behind duplexer and low noise amplifier and the splitter; The signal that reception antenna Y2 receives is given the diversity receiver through behind filter, low noise amplifier and the splitter, and this receive path is done diversity reception and used; Emission accepting state monitor module among Fig. 1 monitors the emission accepting state.
The mobile communication system base station system makes it be no more than two secondary antenna feeders in order to save antenna feeder as far as possible, often adopts overloading to close the road frequently for the mixer of transmission channel.Traditional mixer adopts the three decibels electric bridge, and it all is to be made of the three decibels electric bridge that the mixer among Fig. 2 from left to right is followed successively by two-in-one mixer, four unification mixers and eight-in-one mixer, and the mixer that is made of the three decibels electric bridge has following characteristics:
1, two-in-one three decibels electric bridge is the basis, and desirable loss is a three decibels, during actual design at least greater than three decibels;
2, overloading is closed the road frequently if desired, then needs in layer nested of a plurality of three decibels electric bridges, needs three three decibels electric bridges as three to four carrier is synthetic;
Loss was big when 3, overloading was closed the road frequently, needed three three decibels electric bridges as three to four carrier is synthetic, and inserting loss will be greater than six decibel, and seven to eight the tunnel syntheticly need seven three decibels electric bridges, and Insertion Loss will be greater than nine decibels.
This shows that the three decibels electric bridge closes the road following shortcoming is arranged when overloading is synthetic frequently:
1, overloading takes place frequently and penetrates that to close the road Insertion Loss big;
When 2, emission is closed road carrier frequency number and is increased (being dilatation) Insertion Loss have transition (as two-in-one to three-in-one, four unify five and increase more than the three decibels respectively to the eight-in-one Insertion Loss);
3, emission is closed the road when surpassing four carrier, Insertion Loss greater than six decibels, because Insertion Loss is too big, needs to increase antenna feeder and supplies a gap;
4, emission is closed an emission port free time is always arranged when road carrier frequency number is 3,5,7 odd numbers, can only be respectively with the mixer replacement of four unifications, the six directions one and eight-in-one.
Obviously the existing mixer that is made of the three decibels electric bridge still can not satisfy the mobile communication system base station receiver and transmitter radio frequency front end and make every effort to launch the little designing requirement of Insertion Loss.
Summary of the invention
At the problem that existing mixer exists, the present invention proposes a kind of base station receiver and transmitter radio frequency front end route merging apparatus.
In order to address the above problem, the present invention adopts following technical scheme: this base station receiver and transmitter radio frequency front end route merging apparatus comprises at least two cavity filters, two tuning controling units, the input of each cavity filter all as the input of mixer transmission from the transmitting of base station system sender, the output of each cavity filter is connected to together output as mixer by coaxial cable; Each tuning controling unit all carries out tuning control to pairing cavity filter.
Base station receiver and transmitter radio frequency front end route merging apparatus of the present invention has comprised at least two cavity filters, two tuning controling units, the input of each cavity filter all as the input of mixer transmission from the transmitting of base station system sender, the output of each cavity filter is connected to together output as mixer by coaxial cable; Each tuning controling unit all carries out tuning control to pairing cavity filter.Because cavity filter itself has the characteristics of high quality factor, single filter loss (Insertion Loss) is very little, Insertion Loss behind the mixer that employing is made of a plurality of cavity filters is also very little, can accomplish that single cavity filter Insertion Loss is less than 1 decibel, the mixer Insertion Loss of three cavity filter formations is less than 2.0 decibels, and make three-in-one mixer with the three decibels electric bridge, its loss is above 6 decibels; Two types mixer Insertion Loss differs 4 decibels.Obviously, behind mixer of the present invention, can satisfy the mobile communication system base station receiver and transmitter radio frequency front end and make every effort to launch the little designing requirement of Insertion Loss.
Description of drawings
Fig. 1 is the base station receiver and transmitter radio frequency front end theory diagram.
The mixer block diagram that Fig. 2 is made of the three decibels electric bridge for existing base station receiver and transmitter radio frequency front end.
Fig. 3 is a mixer theory diagram of the present invention.
Fig. 4 is the tuning controling unit theory diagram of mixer of the present invention.
Fig. 5 is a mixer Application Example theory diagram of the present invention.
Embodiment
See also shown in Figure 3, base station receiver and transmitter radio frequency front end route merging apparatus 10 of the present invention comprises at least two cavity filters 11, two tuning controling units 12, in Fig. 3, be example with three cavity filters, three tuning controling units, that is to say with three-in-one mixer to be that example describes, the input of each cavity filter 11 is all transmitted transmitting from the base station system sender as the input of mixer, illustrated to have three senders in the figure, the output of each cavity filter 11 is connected to together output A as mixer by coaxial cable; Each tuning controling unit 12 all carries out tuning control to pairing cavity filter 11.
Please be simultaneously in conjunction with shown in Figure 4, in the above-mentioned tuning controling unit 12, include a signal deteching circuit, control circuit, stepping motor, signal deteching circuit detects the radio frequency transmissions by cavity filter, signal after the detection outputs to control circuit, control circuit is handled the signal of testing circuit output, and the output signal of control circuit is rotated step number to stepping motor and controlled, and realizes the tuning of cavity filter.
Described tuning controling unit 12 also has the tuning control input end of far-end mouth, and this input port is to draw by the control circuit in the tuning controling unit 12.
This mixer also comprises and closes road expansion interface B, and the output (port B) of expansion interface B and cavity filter 11 mutually and connect.
As an embodiment, again in conjunction with the CCU1 shown in Fig. 5, this mixer comprises two cavity filters, two tuning controling units, the input of each cavity filter 11 is all transmitted transmitting from the base station system sender as the input of mixer, two sender (senders 7 have been illustrated to have in the figure, 8), the output of each cavity filter 11 is connected to together output E as mixer by coaxial cable, the output (port E) of closing road expansion interface F and cavity filter 11 mutually and connect, each tuning controling unit 12 all carries out tuning control to pairing cavity filter 11.
Please continue to consult shown in Figure 5, utilize three-in-one, the two-in-one mixer of the foregoing description can constitute the mixer of an eight-in-one, when actual design, three-in-one and two-in-one mixer can be made two submodules.The base station radio-frequency front end that the eight-in-one mixer that is constituted is used for Golbal System for Mobile Communic-ations (GSM).In the figure, two three-in-one mixers (CCU2) and a two-in-one mixer (CCU1) are arranged, and the high-power RF signal of eight senders (sender 1-8) closes Lu Houzai by three-in-one and two-in-one formation mixer and is launched by antenna Y through duplexer.Each tuning controling unit also has the tuning control input end of far-end mouth, base station management system is carried out the tuning control of far-end to each cavity filter in the three-in-one and two-in-one mixer respectively by this input port, and realization is to the tuning control of far-end of each cavity filter of mixer and the configuration of transmitting carrier frequency (passage).
Can accomplish that by the various combination single-antenna transmission of utilizing two-in-one mixer and three-in-one mixer it is 12 even more that maximum is closed road carrier frequency number, loss simultaneously is also very little, can see table with the comparison of traditional three decibels mixer:
| Road carrier frequency number is closed in the base station transceiver emission | Filter Combiner closes the road mode | Tradition three decibels electric bridge mixer closes the road mode | The emission of remarks single antenna | |||
| The Filter Combiner compound mode | Close road Insertion Loss (unit decibel) | Two close | Insertion Loss (unit decibel) constraints: each carrier frequency closes road Insertion Loss unanimity | |||
| CCU2 quantity (three-in-one) | CCU1 quantity (two-in-one) | One mixer number of modules | ||||
| ????2 | ????0 | ????1 | Be generally less than 2.0 | ????1 | Greater than 3.0 | |
| ????3 | ????1 | ????0 | Be generally less than 2.0 | ????3 | Greater than 6.0 | The single antenna emission |
| ????4 | ????0 | ????2 | Be generally less than 2.0 | ????3 | Greater than 6.0 | The single antenna emission |
| ????5 | ????1 | ????1 | Be generally less than 2.0 | ????6 | Greater than 9.0; This seldom adopts when closing road mode actual design | The single antenna emission |
| ????6 | ????2 | ????0 | Be generally less than 2.0 | ????6 | Greater than 9.0; This seldom adopts when closing road mode actual design | The single antenna emission |
| ????7 | ????1 | ????2 | Be generally less than 2.5 | ????7 | Greater than 9.0; This seldom adopts when closing road mode actual design | The single antenna emission |
| ????8 | ????2 | ????1 | Be generally less than 2.5 | ????7 | Greater than 9.0; This seldom adopts when closing road mode actual design | The single antenna emission |
| ????9 | ????3 | ????0 | Be generally less than 2.5 | ????11 | Greater than 12.0; This does not generally adopt when closing road mode actual design | The single antenna emission |
| ????10 | ????2 | ????2 | Be generally less than 3.0 | ????11 | Greater than 12.0; This does not generally adopt when closing road mode actual design | The single antenna emission |
| ????11 | ????3 | ????1 | Be generally less than 3.0 | ????12 | Greater than 12.0; This does not generally adopt when closing road mode actual design | The single antenna emission |
| ????12 | ????4 | ????0 | Be generally less than 3.0 | ????12 | Greater than 12.0; This does not generally adopt when closing road mode actual design | The single antenna emission |
Find out that from last table the transmitting carrier frequency number is during from 2 carrier frequency to 12 carrier frequency, two kinds are closed the road mode and relatively have following characteristics:
1, Insertion Loss: it is little that cavity closes the road Insertion Loss, less than 3 decibels, along with carrier frequency is counted increase and do not had transition, changes little.It is big that the three decibels electric bridge closes the road Insertion Loss, along with carrier frequency is counted increase transition is arranged, increases that one-level three decibels electric bridge is nested just to increase by 3 decibels.
2, mixer utilance: cavity closes road utilance height, only needs N to close the road when not having the three decibels electric bridge to close the road and in fact needs to join the situation (12 close road following) on N+1 road.
3, close way and increase potentiality: cavity closes way, and to increase potentiality big, and the single transmit antenna closes road carrier frequency number can reach 12 even more (realizing by the way of closing that increases single mixer), and the carrier frequency number reached 24 even more when two secondary transmitting antennas used; The three decibels electric bridge closes way, and to increase potentiality little, and the single transmit antenna closes road carrier frequency number and reaches loss in 4 o'clock and reached 6 decibels, is no more than 4 during actual the use, and such two secondary transmitting antennas are no more than 8 when using.
Mixer of the present invention is used for GSM base station transceiver five carrier frequency radio-frequency front-ends, and mixer adopts three-in-one mixer and two submodules of two-in-one mixer, has realized five carrier frequency in GSM base station (passage) work, makes this radio-frequency front-end have the following advantages:
1, five carrier frequency work.
2, the emission Insertion Loss of five carrier frequency is little, closes the road Insertion Loss less than 2 decibels.Under same situation with a secondary transmitting antenna, to close the road than cavity big at least 7 decibels for Insertion Loss when three decibels electric bridge five in one was realized with eight-in-one.
If the 3 three-in-one Filter Combiners with this system change two-in-one Filter Combiner into, close road carrier frequency number and reduce to four, if change the two-in-one Filter Combiner of this system into three-in-one Filter Combiner, close road carrier frequency number and be increased to six, it closes carrier frequency number 1 four to six o'clock road Insertion Loss increase and has only below 0.5 decibel, during concrete the application, its value can be done forr a short time, along with carrier frequency is counted increase and is not had transition, change not quite, can not cause owing to closing road carrier frequency number increases the big variation that brings base station coverage distance.The three decibels electric bridge closes not this advantage of road, it closes road Insertion Loss increase more than at least 3 decibels carrier frequency number 1 four to six o'clock, along with carrier frequency is counted increase transition is arranged, alter a great deal, and, for the system that surpasses four carrier, in the real system because its Insertion Loss too big (reaching 9 decibels) seldom adopts this to close the road mode.
3, this cavity closes road utilance height, does not have idle transmission channel.If close the road with the three decibels electric bridge, five carrier frequency need be used the mode of the six directions one, idle transmission channel.
4, these Filter Combiner carrier frequency number increase potentiality are big.If change the two-in-one Filter Combiner of this system into three-in-one Filter Combiner, to close road carrier frequency number and be increased to six, the carrier frequency number reaches 12 when adopting the secondary transmitting antenna of two these systems two simultaneously.If general maximum four unifications of single secondary transmitting antenna during actual the use, the carrier frequency number also can only reach 8 during with two secondary transmitting antennas.
Claims (4)
1, a kind of base station receiver and transmitter radio frequency front end route merging apparatus, it is characterized in that: this mixer comprises at least two cavity filters, two tuning controling units, the input of each cavity filter all as the input of mixer transmission from the transmitting of base station system sender, the output of each cavity filter is connected to together output as mixer by coaxial cable; Each tuning controling unit all carries out tuning control to pairing cavity filter.
2, base station receiver and transmitter radio frequency front end route merging apparatus as claimed in claim 1, it is characterized in that: described tuning controling unit comprises a signal deteching circuit, control circuit, stepping motor, signal deteching circuit detects the radio frequency transmissions by cavity filter, signal after the detection outputs to control circuit, control circuit is handled the signal of testing circuit output, the output signal of control circuit is rotated step number to stepping motor and is controlled, and realizes the tuning of cavity filter.
3, base station receiver and transmitter radio frequency front end route merging apparatus as claimed in claim 2 is characterized in that: described tuning controling unit also has the tuning control input end of far-end mouth.
4, as claim 1 or 2 or 3 described base station receiver and transmitter radio frequency front end route merging apparatus, it is characterized in that: this mixer also comprises and closes the road expansion interface, and the output of this expansion interface and cavity filter mutually and connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011269030A CN1167294C (en) | 2001-09-28 | 2001-09-28 | Base station receiver and transmitter radio frequency front end route merging apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011269030A CN1167294C (en) | 2001-09-28 | 2001-09-28 | Base station receiver and transmitter radio frequency front end route merging apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1411296A true CN1411296A (en) | 2003-04-16 |
| CN1167294C CN1167294C (en) | 2004-09-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011269030A Expired - Lifetime CN1167294C (en) | 2001-09-28 | 2001-09-28 | Base station receiver and transmitter radio frequency front end route merging apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1167294C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101916898A (en) * | 2010-09-08 | 2010-12-15 | 江苏华之光微波科技有限公司 | Multi-circuit combiner and manufacturing method thereof |
| CN107483062A (en) * | 2017-09-19 | 2017-12-15 | 成都嘉泰华力科技有限责任公司 | A kind of multipath reception passage |
-
2001
- 2001-09-28 CN CNB011269030A patent/CN1167294C/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101916898A (en) * | 2010-09-08 | 2010-12-15 | 江苏华之光微波科技有限公司 | Multi-circuit combiner and manufacturing method thereof |
| CN107483062A (en) * | 2017-09-19 | 2017-12-15 | 成都嘉泰华力科技有限责任公司 | A kind of multipath reception passage |
| CN107483062B (en) * | 2017-09-19 | 2023-07-04 | 成都嘉泰华力科技有限责任公司 | Multipath receiving channel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1167294C (en) | 2004-09-15 |
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Granted publication date: 20040915 |
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