CN201167321Y - 7-8GHz PDH digital microwave radio frequency unit and outdoor unit - Google Patents
7-8GHz PDH digital microwave radio frequency unit and outdoor unit Download PDFInfo
- Publication number
- CN201167321Y CN201167321Y CNU2008200792867U CN200820079286U CN201167321Y CN 201167321 Y CN201167321 Y CN 201167321Y CN U2008200792867 U CNU2008200792867 U CN U2008200792867U CN 200820079286 U CN200820079286 U CN 200820079286U CN 201167321 Y CN201167321 Y CN 201167321Y
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- unit
- radio frequency
- digital microwave
- 8ghz
- frequency
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Abstract
The utility model discloses a 7-8GHz PDH digital microwave radio-frequency (RF) unit and an outdoor unit. The RF unit comprises a RF transmitting unit and a RF receiving unit, each of which comprises a plurality of independent cavities. Each two adjacent cavities communicate with each other via a groove, an independent circuit module, such as voltage controlled oscillator module, a RF amplifier module, a N-times frequency circuit module, a filter module, a RF low-noise amplifier module, etc., is arranged in each independent cavity, and the circuit modules in different cavities are electronically connected with each other via the grooves. The RF unit can be used in an outdoor unit with 7-8GHz PDH digital microwave or other products with digital microwave. The digital microwave outdoor unit comprising the RF unit has the advantages of strong anti-electromagnetic interference capacity of the circuit, simple structure, and smaller volume.
Description
Technical field
The utility model relates to a kind of digital microwave telecommunication technology, relates in particular to a kind of 7-8GHz PDH digital microwave radio frequency unit and outdoor unit.
Background technology
In radio communication, particularly in digital microwave telecommunication, often need to use radio frequency unit.
Radio frequency unit complex structure of the prior art, circuit poor anti jamming capability.
Summary of the invention
The purpose of this utility model provides a kind of simple in structure, 7-8GHz PDH digital microwave radio frequency unit and outdoor unit that the circuit anti-electromagnetic interference capability is strong.
The purpose of this utility model is achieved through the following technical solutions:
7-8GHz PDH digital microwave radio frequency unit of the present utility model, comprise radio frequency receipts unit, radio frequency bill unit, described radio frequency is received the unit and radio frequency bill unit comprises a plurality of independently cavitys respectively, pass through the mutual UNICOM of groove between the adjacent cavity, be respectively equipped with independent circuit module in described a plurality of independently cavity, be electrically connected mutually by described groove between the circuit module in the different cavitys; Described circuit module comprises one or more in the following circuit module:
Voltage-control oscillator module, radio frequency amplifier module, N frequency multiplier circuit module, filter module, radio frequency low-noise amplifier module;
The total length of this radio frequency unit smaller or equal to 140mm, width smaller or equal to 51mm.
Digital microwave outdoor unit of the present utility model, comprise above-mentioned 7-8GHz PDH digital microwave radio frequency unit, also comprise control unit, duplexer, intermediate frequency unit, described intermediate frequency unit comprises dielectric filter, and the centre frequency of described dielectric filter is 1542MHz or 1715MHz.
The technical scheme that provides by above-mentioned the utility model as can be seen, 7-8GHz PDH digital microwave radio frequency unit described in the utility model and outdoor unit.Because radio frequency is received the unit and radio frequency bill unit comprises a plurality of independently cavitys respectively, pass through the mutual UNICOM of groove between the adjacent cavity, be respectively equipped with independent circuit module in a plurality of independently cavitys, be electrically connected mutually by described groove between the circuit module in the different cavitys.Simple in structure, the circuit anti-electromagnetic interference capability is strong.
Description of drawings
Fig. 1 is the theory diagram of the outdoor unit of the utility model digital microwave;
Fig. 2 is digital microwave high station, low station schematic diagram;
Fig. 3 is the cloth version schematic diagram of the specific embodiment of the utility model 7-8GHz PDH digital microwave radio frequency unit.
Embodiment
Digital microwave outdoor unit of the present utility model, its preferable embodiment as shown in Figure 1, it is the digital microwave outdoor unit of 7-8GHz PDH (PDH (Pseudo-synchronous Digital Hierarchy) Plesiochronous Digital Hierarchy), the signal that comes from indoor unit at first passes through control unit, links to each other with intermediate frequency unit after treatment.
Intermediate frequency unit with the sending and receiving intermediate frequency separately.Sending out intermediate frequency directly is modulated on the local oscillator; Sending out local oscillation signal launches through too high power amplifier and duplexer.The 7-8GHz PDH digital microwave signal that receives enters LNA through duplexer, enters frequency mixer then and receives the local oscillation signal mixing, and the receipts intermediate frequency that mixing is come out enters intermediate frequency unit, enters indoor unit through control unit then.
Intermediate frequency unit comprises dielectric filter, and the centre frequency of dielectric filter is 1542MHz or 1715MHz.
Digital microwave outdoor unit of the present utility model is not limited to the outdoor unit of 7-8GHz PDH digital microwave, also can be the outdoor unit of the digital microwave of its frequency.
As shown in Figure 2, digital microwave outdoor unit of the present utility model, one of 7-8GHz PDH digital microwave is jumped and is made up of a high station and a low station.Described high station is meant that tranmitting frequency is higher than the digital microwave relay station of receive frequency; Described low station is meant that tranmitting frequency is lower than the digital microwave relay station of receive frequency.
7-8GHz PDH digital microwave radio frequency unit in the above-mentioned digital microwave outdoor unit, comprise radio frequency receipts unit, radio frequency bill unit, radio frequency is received the unit and radio frequency bill unit comprises a plurality of independently cavitys respectively, pass through the mutual UNICOM of groove between the adjacent cavity, be respectively equipped with independent circuit module in a plurality of independently cavitys, as in the modules such as voltage-control oscillator module, radio frequency amplifier module, N frequency multiplier circuit module, filter module, radio frequency low-noise amplifier module one or more.
The total length of this radio frequency unit smaller or equal to 140mm, width smaller or equal to 51mm.
Radio frequency bill unit comprises high power amplifier (high power amplifier), filter, N frequency multiplier circuit, voltage-controlled oscillator circuit, and high power amplifier is connected with coaxial cable by microstrip line, SMA connector.
Radio frequency is received the unit and is comprised low noise amplifier (LNA), mirror filter, frequency mixer, connect successively by microstrip line between low noise amplifier, mirror filter, the frequency mixer, low noise amplifier is connected with coaxial cable by microstrip line, SMA connector.
As shown in Figure 3, radio frequency receipts unit and radio frequency bill unit inside comprise three independently cavitys respectively.
Radio frequency is wherein received link, the digital microwave signal that receives enters low noise amplifier 1 through sub-miniature A connector, the signal that enters frequency mixer 4 through mirror filter then and receive local oscillator 5 carries out mixing, and the receipts intermediate-freuqncy signal that mixing is come out enters intermediate frequency unit through intermediate frequency amplifier.
Radio frequency is sent out link, from sending out the emission frequency signal of local oscillator 6, enters high power amplifier 7 after sending out frequency multiplier 3, sends out from waveguide through little band and SMA connector again.
The utility model can be applied in the outdoor unit of digital microwave of 7-8GHz PDH, also can be applied in other the digital microwave product.Make the ability of circuit anti-electromagnetic interference capability, electromagnetic compatibility all strengthen greatly; And structure is simpler, compacter, volume is littler.
The above; it only is the preferable embodiment of the utility model; but protection range of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement all should be encompassed within the protection range of the present utility model.
Claims (6)
1, a kind of 7-8GHz PDH digital microwave radio frequency unit, comprise radio frequency receipts unit, radio frequency bill unit, it is characterized in that, described radio frequency is received the unit and radio frequency bill unit comprises a plurality of independently cavitys respectively, pass through the mutual UNICOM of groove between the adjacent cavity, be respectively equipped with independent circuit module in described a plurality of independently cavity, be electrically connected mutually by described groove between the circuit module in the different cavitys; Described circuit module comprises one or more in the following circuit module:
Voltage-control oscillator module, radio frequency amplifier module, N frequency multiplier circuit module, filter module, radio frequency low-noise amplifier module;
The total length of this radio frequency unit smaller or equal to 140mm, width smaller or equal to 51mm.
2,7-8GHz PDH digital microwave radio frequency unit according to claim 1, it is characterized in that, described radio frequency bill unit comprises high power amplifier, filter, N frequency multiplier circuit, voltage-controlled oscillator circuit, and described high power amplifier is connected with coaxial cable by microstrip line, SMA connector.
3,7-8GHz PDH digital microwave radio frequency unit according to claim 1, it is characterized in that, described radio frequency is received the unit and is comprised low noise amplifier, mirror filter, frequency mixer, connect successively by microstrip line between described low noise amplifier, mirror filter, the frequency mixer, described low noise amplifier is connected with coaxial cable by microstrip line, SMA connector.
According to claim 1 or 3 described 7-8GHz PDH digital microwave radio frequency units, it is characterized in that 4, described radio frequency is received inside, unit and is divided into three cavitys.
5,7-8GHz PDH digital microwave radio frequency unit according to claim 1 and 2 is characterized in that, the first inside of described radio frequency bill is divided into three cavitys.
6, a kind of digital microwave outdoor unit, it is characterized in that, comprise each described 7-8GHzPDH digital microwave radio frequency unit of claim 1 to 5, also comprise control unit, duplexer, intermediate frequency unit, described intermediate frequency unit comprises dielectric filter, and the centre frequency of described dielectric filter is 1542MHz or 1715MHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200792867U CN201167321Y (en) | 2008-03-10 | 2008-03-10 | 7-8GHz PDH digital microwave radio frequency unit and outdoor unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200792867U CN201167321Y (en) | 2008-03-10 | 2008-03-10 | 7-8GHz PDH digital microwave radio frequency unit and outdoor unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201167321Y true CN201167321Y (en) | 2008-12-17 |
Family
ID=40192713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200792867U Expired - Fee Related CN201167321Y (en) | 2008-03-10 | 2008-03-10 | 7-8GHz PDH digital microwave radio frequency unit and outdoor unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201167321Y (en) |
-
2008
- 2008-03-10 CN CNU2008200792867U patent/CN201167321Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081217 Termination date: 20120310 |