CN205828610U - A kind of miniaturization cavity duplexer being applied to digital high-frequency amplification station - Google Patents
A kind of miniaturization cavity duplexer being applied to digital high-frequency amplification station Download PDFInfo
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- CN205828610U CN205828610U CN201620807847.5U CN201620807847U CN205828610U CN 205828610 U CN205828610 U CN 205828610U CN 201620807847 U CN201620807847 U CN 201620807847U CN 205828610 U CN205828610 U CN 205828610U
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Abstract
The utility model discloses a kind of miniaturization cavity duplexer being applied to digital high-frequency amplification station, it includes cavity and the signal public port being arranged on cavity front panel, described cavity includes up bandpass filtering unit, descending bandpass filtering unit, up bandpass filtering unit and descending bandpass filtering unit are overlapping up and down to be placed, centre is separated by isolation bar, uses coupling coaxial resonant cavity structure；Up bandpass filtering unit all connects with signal public port with descending bandpass filtering unit, and the front panel of cavity is additionally provided with the up bandpass signal input port corresponding with up bandpass filtering unit and the descending bandpass signal input port corresponding with descending bandpass filtering unit；Being additionally provided with coupling port on cavity front panel, coupling port is for coupling the radiofrequency signal in duplexer and being transferred to modem for remotely monitoring.Upper and lower 2 filter units are overlapping up and down to be placed, and has saved bulk, and length direction reduces a half-size scale, beneficially direct discharging station miniaturization.
Description
Technical field
This utility model relates to mobile communication technology field, a kind of miniaturization cavity being applied to digital high-frequency amplification station
Duplexer.
Background technology
Digital high-frequency amplification station is to utilize digital if technology the repeater class carrying out optical transport after analog signal digital to be set
Standby, its core technology is digitised Intermediate Frequency technology, and higher as technology content in indoor distributed system product, system index is higher
New generation product instead of equipment such as simulation repeater etc. and be in industry widely used.Digital high-frequency amplification station is made at present
A kind of preferred version of ability is extended over for solving communication network.It has simple in construction compared with macro station, invests less and peace
The advantages such as dress is convenient, can be widely used for being difficult to the blind area of covering and weak district, such as market, hotel, airport, harbour, station, physical culture
The various places such as shop, amusement hall, subway, tunnel, highway, island, improve communication quality, solve the problems such as call drop, have
Mend blind and the advantage such as extend over.It is low that digital high-frequency amplification station has noise simultaneously, and networking mode is flexible, and stabilization of equipment performance is the most high excellent
Point, is therefore with a wide range of applications in networking, and duplexer is as one of the important module of digital high-frequency amplification station, and it is made
With being that uplink and downlink signal is isolated, it is ensured that receive and launch and can normally work simultaneously.It is by two groups of different frequencies
Band filter composition.In digital high-frequency amplification station, it is desirable to system noise low voice, isolation is higher, thus requires that duplexer has
Higher Out-of-band rejection, this progression typically requiring increase resonator cavity reaches, and so can increase size and the cost of duplexer,
But the miniaturization of digital direct discharging station is also one of trend of production development simultaneously, a kind of volume is proposed the most here little, band
Outer suppression height, the digital high-frequency amplification station duplexer of low cost.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, it is provided that a kind of be applied to the small-sized of digital high-frequency amplification station
Changing cavity duplexer, in configuration aspects, upper and lower 2 filter units are overlapping up and down to be placed rather than being placed in parallel of routine, joint
About bulk, length direction reduces a half-size scale, beneficially direct discharging station miniaturization.
The purpose of this utility model is achieved through the following technical solutions: a kind of be applied to the small-sized of digital high-frequency amplification station
Changing cavity duplexer, it includes cavity and the signal public port being arranged on cavity front panel, and described cavity includes up
Bandpass filtering unit, descending bandpass filtering unit, up bandpass filtering unit and descending bandpass filtering unit are overlapping up and down to be placed,
Centre is separated by isolation bar, uses coupling coaxial resonant cavity structure；Up bandpass filtering unit and descending bandpass filtering list
Unit all connects with signal public port, and the front panel of cavity is additionally provided with the up band communication corresponding with up bandpass filtering unit
Number input port and the descending bandpass signal input port corresponding with descending bandpass filtering unit；It is additionally provided with on cavity front panel
Coupling port, coupling port is for coupling the radiofrequency signal in duplexer and being transferred to modem for remotely monitoring；Up band leads to
Filter unit and descending bandpass filtering unit all include that multiple bandpass filtering chamber, described each bandpass filtering intracavity are equipped with one
Or multiple resonant rod, it is provided with coupling window between adjacent two resonant rods of same bandpass filtering intracavity.
Described up bandpass filtering unit is CDMA800 up bandpass filtering unit, inside sets eight up resonant rods, letter
Number public port to up signal input port passes sequentially through the first up resonant rod, the second up resonant rod, the 3rd up humorous
Shake bar, the 4th up resonant rod, the 5th up resonant rod, the 6th up resonant rod, the 7th up resonant rod and the 8th is up humorous
Shake bar.
Described descending bandpass filtering unit is CDMA800 descending bandpass filtering unit, inside sets eight descending resonant rods, letter
Number public port to downstream signal input port passes sequentially through the first descending resonant rod, the second descending resonant rod, the 3rd descending humorous
Shake bar, the 4th descending resonant rod, the 5th descending resonant rod, the 6th descending resonant rod, the 7th descending resonant rod and the 8th is descending humorous
Shake bar.
It is provided with a cross-couplings between 6th resonant rod and the 8th resonant rod of described descending bandpass filtering unit.
It is provided with coupling screws between described coupling window.
The size of described up resonant rod for height 43.5mm, external diameter 10mm, internal diameter 8mm, resonant rod disk diameter is
25mm。
The size of described descending resonant rod for height 43mm, external diameter 10mm, internal diameter 8mm, resonant rod disk diameter is
25mm。
In described up bandpass filtering unit, signal is passed sequentially through by signal public port to up signal input port
Coupling window size be followed successively by: 10.5mm, 8.5mm, 7.5mm, 7mm, 7.5mm, 8.5mm and 10.5mm；
In described descending bandpass filtering unit, signal is passed sequentially through to downstream signal input port by signal public port
Coupling window size be followed successively by: 10mm, 8mm, 7mm, 6.5mm, 7mm, 8mm and 10mm.
The beneficial effects of the utility model are: this utility model provides a kind of miniaturization chamber being applied to digital high-frequency amplification station
Body duplexer, by separating the cavity into the CDMA duplexer up bandpass filtering chamber of overlap, the descending band of CDMA duplexer up and down
Pass filter chamber, the signal public port that cavity front end is arranged, the signal coupling port that cavity front end is arranged, cavity rear end is provided with
The corresponding CDMA upward signal input port in chambeies, CDMA downstream signal input port, bandpass filtering is filtered with described two kinds
Intracavity is provided with one or more resonant rod, it is achieved uplink and downlink signals common antenna end, and reception and transmitting signal do not interfere with each other,
The miniaturization of the size of duplexer, beneficially digital direct discharging station can be greatly reduced.Interior layout is reasonable, compact conformation.
CDMA800 duplexer up bandpass filtering intracavity is provided with height 43.5mm, external diameter 10mm, internal diameter 8mm and resonant rod
Disk diameter is the resonant rod of 25mm, and descending bandpass filtering intracavity is provided with height 435mm, external diameter 10mm, internal diameter 8mm and resonant rod
Disk diameter is the resonant rod of 25mm, the coupling window size of up bandpass filtering unit be respectively as follows: 10.5mm, 8.5mm,
7.5mm, 7mm, 7.5mm, 8.5mm and 10.5mm；The coupling window size of descending bandpass filtering unit be respectively as follows: 10mm, 8mm,
7mm, 6.5mm, 7mm, 8mm and 10mm；Realize respectively CDMA upward signal i.e. passband 825-835MHz and CDMA downstream signal
The i.e. bandpass filtering of passband 870-880MHz.
Accompanying drawing explanation
Fig. 1 is duplexer overall structure schematic diagram；
Fig. 2 is duplexer muscle schematic diagram；
Fig. 3 is duplexer up bandpass filtering cell schematics；
Fig. 4 is duplexer descending bandpass filtering cell schematics；
In figure, 1-cavity, 2-signal public port, 3-up bandpass signal input port, the descending bandpass signal of 4-inputs
Port, 5-coupling port, 6-up bandpass filtering unit, 7-descending bandpass filtering unit, 8-couples window, 9-resonant rod,
The up resonant rod of 9.1-, the descending resonant rod of 9.2-, 10-coupling screws, 11-cross-couplings, 12-isolation bar.
Detailed description of the invention
The technical solution of the utility model is described in further detail below in conjunction with the accompanying drawings, but protection domain of the present utility model
It is not limited to the following stated.
As shown in Fig. 1 to Fig. 4, a kind of miniaturization cavity duplexer being applied to digital high-frequency amplification station, it includes cavity and sets
Being placed in the signal public port on cavity 1 front panel, described cavity 1 includes up bandpass filtering unit 6, descending bandpass filtering
Unit 7, up bandpass filtering unit 6 and descending bandpass filtering unit about 7 are overlapping to be placed, and centre is separated by isolation bar,
Use coupling coaxial resonant cavity structure；Up bandpass filtering unit 6 and descending bandpass filtering unit 7 are all with signal public port even
Logical, the front panel of cavity is additionally provided with the up bandpass signal input port 3 corresponding with up bandpass filtering unit 6 and with descending
The descending bandpass signal input port 4 of bandpass filtering unit 7 correspondence；Coupling port, coupled end it is additionally provided with on cavity front panel
Mouth is for coupling the radiofrequency signal in duplexer and being transferred to modem for remotely monitoring；Up bandpass filtering unit 6 and descending
Bandpass filtering unit 7 all includes that multiple bandpass filtering chamber, described each bandpass filtering intracavity are equipped with one or more resonant rod,
Coupling window 8 it is provided with between adjacent two resonant rods of same bandpass filtering intracavity.
Described up bandpass filtering unit is CDMA800 up bandpass filtering unit, inside sets eight up resonant rods
9.1, signal public port to up signal input port 3 pass sequentially through the first up resonant rod, the second up resonant rod, the 3rd
Up resonant rod, the 4th up resonant rod, the 5th up resonant rod, the 6th up resonant rod, the 7th up resonant rod and the 8th
Up resonant rod.
Described descending bandpass filtering unit is CDMA800 descending bandpass filtering unit, inside sets eight descending resonant rods
9.2, signal public port to downstream signal input port 4 pass sequentially through the first descending resonant rod, the second descending resonant rod, the 3rd
Descending resonant rod, the 4th descending resonant rod, the 5th descending resonant rod, the 6th descending resonant rod, the 7th descending resonant rod and the 8th
Descending resonant rod.
The resonant rod quantity i.e. exponent number of band filter of bandpass filtering intracavity, when exponent number increases, Out-of-band rejection increases, but
Insertion loss is deteriorated；When bandwidth increases, near pass-band suppression reduces, but insertion loss improves.So up bandpass filtering chamber
Exponent number is eight rank, and the exponent number in descending bandpass filtering chamber is eight rank.The size of resonant rod determines the passband central frequency of wave filter,
In this utility model, owing to cavity cover plate and tuning screw form loading capacitance, this capacitive load with resonant rod open end
Coaxial resonant cavity structure can effectively shorten the size of coaxial resonant cavity and resonant rod, it is considered to the quality factor of coaxial resonant cavity, merit
The material elementses such as rate capacity, draw the size of each resonant rod after 3 D electromagnetic simulation software HFSS simulation optimization.
The size of described up resonant rod 9.1 is height 43.5mm, external diameter 10mm, internal diameter 8mm, resonant rod disk diameter
For 25mm.
The size of described descending resonant rod 9.2 for height 43mm, external diameter 10mm, internal diameter 8mm, resonant rod disk diameter is
25mm。
It is provided with a cross-couplings between 6th resonant rod and the 8th resonant rod of described descending bandpass filtering unit.
Thus produce a transmission zero at high band, improve Out-of-band rejection degree.Decrease resonant rod quantity, reduce assembling and adjust
Examination difficulty, improves production efficiency and product electrical performance indexes.
Up bandpass filtering unit 6 and the overlapping placement of descending bandpass filtering unit about 7, use coupling coaxial resonant cavity
Structure, from lowpass prototype filter, by frequency transformation, realizes the mutual level between each resonator cavity with impedance transformer
Connection, thus obtain each performance indications of band filter.Bandpass filtering chamber is based on direct-coupled cavities filter theory, cascade
Multi-stage coaxial resonator cavity realizes the transmission curve of chebyshev function response.Coaxial resonant cavity is four points of one section of short at one end
One of wavelength coaxial line, its equivalent circuit is a shunt-resonant circuit, and this resonant tank is the most complete due to its energy of electromagnetic field
Portion is enclosed in cavity, almost without radiation loss, therefore can reach higher quality factor, and coaxial resonant cavity wave filter has
Insertion loss is little, Out-of-band rejection is high and bears power high.
It is provided with coupling screws between described coupling window 8, wears from cover plate and be deep into inside cavity, be used for regulating coupling
Closing intensity, the diameter of the degree of depth and screw that strengthen coupling screws can increase the stiffness of coupling between resonator cavity.Each resonant rod
Coupling power determines the bandwidth of filter pass band, and the bandpass filtering chamber in this utility model uses shape of windowing between coaxial resonant cavity
Becoming magnetic couplings, the part that isolation bar protrudes in each filtering chamber is between resonator cavity and couples part of windowing, and window is the biggest,
The degree of coupling is the strongest, utilizes the emulation of HFSS simulation software to confirm the corresponding coefficient of coup, and method is the two-chamber knot for intercoupling
Structure, to coupled structure size scanning parameter, has obtained one group with coupling window size song corresponding during coupling window size change
Line, chooses coupling window mouth size by the point of the corresponding coefficient of coup.
In described up bandpass filtering unit 6, signal is led to successively by signal public port to up signal input port 3
The size of the coupling window 8 crossed is followed successively by: 10.5mm, 8.5mm, 7.5mm, 7mm, 7.5mm, 8.5mm and 10.5mm；
In described descending bandpass filtering unit 7, signal is led to downstream signal input port 4 successively by signal public port
The size of the coupling window 8 crossed is followed successively by: 10mm, 8mm, 7mm, 6.5mm, 7mm, 8mm and 10mm.
Utility model works principle is: when being concurrently accessed two kinds of signals of uplink and downlink, upward signal is on CDMA
Row bandpass signal input port inputs the up CDMA bandpass filtering chamber being made up of eight up resonant rods of CDMA, and described is up
CDMA bandpass filtering chamber filters the out of band signal in CDMA upward signal, then exports from signal public port 2；Downstream signal warp
CDMA downstream signal input port inputs the descending CDMA bandpass filtering chamber that is made up of 8 up resonant rods of CDMA, described under
Row CDMA bandpass filtering chamber filters the out of band signal in CDMA downstream signal, then exports from signal public port 2；Two kinds of signals
Form the output of common antenna port, it is achieved upward signal, the conjunction road of two kinds of signals of downstream signal and non-interfering output, meet
Digital direct discharging station up-downgoing system common antenna end and non-interfering demand.
Claims (8)
1. being applied to a miniaturization cavity duplexer for digital high-frequency amplification station, it includes cavity (1) and is arranged at before cavity (1)
Signal public port (2) on plate, it is characterised in that: described cavity (1) includes up bandpass filtering unit (6), descending band
Pass filtering unit (7), up bandpass filtering unit (6) and descending bandpass filtering unit (7) are the most overlapping to be placed, and centre is passed through
Isolation bar (12) separates, and uses coupling coaxial resonant cavity structure；Up bandpass filtering unit (6) and descending bandpass filtering unit
(7) all connecting with signal public port (2), the front panel of cavity (1) is additionally provided with corresponding with up bandpass filtering unit (6)
Up bandpass signal input port (3) and the descending bandpass signal input port (4) corresponding with descending bandpass filtering unit (7)；
Being additionally provided with coupling port (5) on cavity (1) front panel, coupling port (5) is for coupling the radiofrequency signal in duplexer and passing
It is defeated by modem for remotely monitoring；Up bandpass filtering unit (6) and descending bandpass filtering unit (7) all include that multiple band leads to
Filtering chamber, described each bandpass filtering intracavity is equipped with one or more resonant rod (9), adjacent two of same bandpass filtering intracavity
Coupling window (8) it is provided with between resonant rod (9).
A kind of miniaturization cavity duplexer being applied to digital high-frequency amplification station the most according to claim 1, it is characterised in that: institute
The up bandpass filtering unit (6) stated is CDMA800 up bandpass filtering unit, inside sets eight up resonant rods (9.1), signal
Public port (2) to up signal input port (3) pass sequentially through the first up resonant rod, the second up resonant rod, on the 3rd
On row resonant rod, the 4th up resonant rod, the 5th up resonant rod, the 6th up resonant rod, the 7th up resonant rod and the 8th
Row resonant rod.
A kind of miniaturization cavity duplexer being applied to digital high-frequency amplification station the most according to claim 1, it is characterised in that: institute
The descending bandpass filtering unit (7) stated is CDMA800 descending bandpass filtering unit, inside sets eight descending resonant rods (9.2), signal
Public port (2) to downstream signal input port (4) pass sequentially through the first descending resonant rod, the second descending resonant rod, the 3rd time
Row resonant rod, the 4th descending resonant rod, the 5th descending resonant rod, the 6th descending resonant rod, the 7th descending resonant rod and the 8th time
Row resonant rod.
A kind of miniaturization cavity duplexer being applied to digital high-frequency amplification station the most according to claim 1, it is characterised in that: institute
It is provided with a cross-couplings (11) between 6th resonant rod and the 8th resonant rod of the descending bandpass filtering unit (7) stated.
A kind of miniaturization cavity duplexer being applied to digital high-frequency amplification station the most according to claim 1, it is characterised in that: institute
It is provided with coupling screws (10) between the coupling window (8) stated.
A kind of miniaturization cavity duplexer being applied to digital high-frequency amplification station the most according to claim 2, it is characterised in that: institute
The size of the up resonant rod (9.1) stated is 25mm for height 43.5mm, external diameter 10mm, internal diameter 8mm, resonant rod disk diameter.
A kind of miniaturization cavity duplexer being applied to digital high-frequency amplification station the most according to claim 3, it is characterised in that: institute
The size of the descending resonant rod (9.2) stated is 25mm for height 43mm, external diameter 10mm, internal diameter 8mm, resonant rod disk diameter.
A kind of miniaturization cavity duplexer being applied to digital high-frequency amplification station the most according to claim 1, it is characterised in that: institute
In the up bandpass filtering unit (6) stated, signal is passed sequentially through by signal public port (2) to up signal input port (3)
The size of coupling window (8) be followed successively by: 10.5mm, 8.5mm, 7.5mm, 7mm, 7.5mm, 8.5mm and 10.5mm；
In described descending bandpass filtering unit (7), signal is depended on to downstream signal input port (4) by signal public port (2)
The size of the secondary coupling window (8) passed through is followed successively by: 10mm, 8mm, 7mm, 6.5mm, 7mm, 8mm and 10mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620807847.5U CN205828610U (en) | 2016-07-29 | 2016-07-29 | A kind of miniaturization cavity duplexer being applied to digital high-frequency amplification station |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620807847.5U CN205828610U (en) | 2016-07-29 | 2016-07-29 | A kind of miniaturization cavity duplexer being applied to digital high-frequency amplification station |
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| CN205828610U true CN205828610U (en) | 2016-12-21 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106058393A (en) * | 2016-07-29 | 2016-10-26 | 四川天邑康和通信股份有限公司 | Miniaturized cavity duplexer applied to digital repeaters |
| CN109687073A (en) * | 2019-03-01 | 2019-04-26 | 江苏德是和通信科技有限公司 | A kind of star-like duplexer of DTV adjacent channel |
-
2016
- 2016-07-29 CN CN201620807847.5U patent/CN205828610U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106058393A (en) * | 2016-07-29 | 2016-10-26 | 四川天邑康和通信股份有限公司 | Miniaturized cavity duplexer applied to digital repeaters |
| CN109687073A (en) * | 2019-03-01 | 2019-04-26 | 江苏德是和通信科技有限公司 | A kind of star-like duplexer of DTV adjacent channel |
| CN109687073B (en) * | 2019-03-01 | 2024-04-12 | 江苏德是和通信科技有限公司 | Digital television adjacent channel star-shaped duplexer |
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