CN208638350U - A kind of CASS feed integration satellite low-converter - Google Patents
A kind of CASS feed integration satellite low-converter Download PDFInfo
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- CN208638350U CN208638350U CN201821269149.XU CN201821269149U CN208638350U CN 208638350 U CN208638350 U CN 208638350U CN 201821269149 U CN201821269149 U CN 201821269149U CN 208638350 U CN208638350 U CN 208638350U
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Abstract
The utility model discloses a kind of CASS feed integration satellite low-converters, vertical polarization signal probe, first low noise amplification module, first micro-strip bandpass filtering modules block, first PLL chip and the first low pass bandpass filtering modules block are sequentially connected, horizontal polarization signals probe, second low noise amplification module, second micro-strip bandpass filtering modules block, 2nd PLL chip and the second low pass bandpass filtering modules block are sequentially connected, first low pass bandpass filtering modules block and the second low pass bandpass filtering modules block are connect with combiner module, combiner module, first intermediate frequency amplification module, wire signal filter and amplification module and the first F tip side are sequentially connected, first intermediate frequency amplification module is also connect with the 2nd F tip side.The utility model replaces the DRO oscillation module being made of discrete component using integrated PLL chip, improves local oscillated signal stability, and product processes are simplified, and improves production efficiency, reduces material cost and cost of labor.
Description
Technical field
The utility model relates to become under satellite receiving equipment technical field more particularly to a kind of CASS feed integration satellite
Frequency device.
Background technique
Satellite low-converter is also known as outdoor unit, be the weak satellite TV signal for receiving antenna amplify and under
It is converted to output in suitable frequency range, image is then decoded by receiver and voice signal is sent into television set.With satellite
There are the demand of differentiation in the innovation of broadcast television reception system the relevant technologies, different regions, become under the satellite of type generally used now
Frequency device cannot be applicable in all market.National in South America, local satellite broadcasting television receiving device is using spy
(abbreviation of Claro Analog StackedSolution, is satellite TV signal and cable TV signal to the CASS not customized
It is superimposed a solution combined) feed integration satellite low-converter.
On the market the CASS feed integration satellite low-converter of mainstream is using DRO scheme, wherein DRO scheme
DRO oscillation module in CASS feed integration satellite low-converter is made of dielectric oscillator, signal amplifier and microstrip line,
Its shortcomings that there are following several respects: the local oscillating frequency of first, DRO scheme is influenced by ambient temperature, is easy to make
At the offset of frequency of oscillation or unstable；The signal of the local oscillating frequency transmitting of second, DRO scheme is stronger, cannot design
On same wiring board, not so intersection (two dielectric oscillators work together) interference of signal can be very serious, and meeting is adjusted in interaction
It is difficult to inhibit, dielectric oscillator route is combined by many discrete devices and constituted, and occupied space is bigger, and PCBA area can also compare
Larger, ultimately causing complete product volume can be bigger, indirectly increases material cost, the assembly welding of multiple wiring boards
Increase cost of labor；Third, the local oscillating frequency in DRO scheme are the oscillation cavity on cover board, the oscillation on PCBA
Route and dielectric oscillator match the frequency that co oscillation goes out, because of the device error problem of product, each product vibrates out original
Frequency is will not to be fixed on the Frequency point of needs, so will be adjusted to the size of oscillation cavity, vibrates cavity
Size will put in the number of cavity by frequency modulation screw to change, and increase cost of labor.
Summary of the invention
Technical problem to be solved by the utility model is to provide a kind of CASS feed integration satellite low-converter,
The DRO oscillation module being made of discrete component is replaced using integrated PLL chip, is improved local oscillated signal and is stablized
Property, and product processes are simplified, production efficiency is improved, material cost and cost of labor are reduced.
In order to solve the above-mentioned technical problem, the utility model provides a kind of CASS feed integration satellite low-converter,
Including feed radiating guide module, the first low noise amplification module, the second low noise amplification module, the first micro-strip bandpass filtering mould
Block, the second micro-strip bandpass filtering modules block, the first PLL chip, the 2nd PLL chip, the first crystal oscillator, the second crystal oscillator, the first lower passband
Pass filtering module, the second low pass bandpass filtering modules block, combiner module, the first intermediate frequency amplification module, wire signal filter and amplification
Module, the first F tip side and the 2nd F tip side；
The feed radiating guide module includes vertical polarization signal probe for receiving vertical polarization signal and is used for
Receive the horizontal polarization signals probe of horizontal polarization signals；
The vertical polarization signal probe, the first low noise amplification module, the first micro-strip bandpass filtering modules block,
The first PLL chip and the first low pass bandpass filtering modules block are sequentially connected, the first PLL chip and first crystalline substance
Vibration is connected in parallel, the horizontal polarization signals probe, the second low noise amplification module, the second micro-strip bandpass filtering mould
Block, the 2nd PLL chip and the second low pass bandpass filtering modules block are sequentially connected, the 2nd PLL chip and described the
Two crystal oscillators are connected in parallel, the first low pass bandpass filtering modules block and the second low pass bandpass filtering modules block with the combining
The connection of device module, the combiner module, the first intermediate frequency amplification module, the wire signal filter and amplification module and first
F tip side is sequentially connected, and the first intermediate frequency amplification module is also connect with the 2nd F tip side.
Further, the first PLL chip is identical with the structure of the 2nd PLL chip.
Further, the first PLL chip includes in local oscillator, frequency mixer, the second intermediate frequency amplifier and third
Audio amplifier；
The local oscillator, second intermediate frequency amplifier and the third intermediate frequency amplifier connect with the frequency mixer
Connect, second intermediate frequency amplifier is also connect with the first micro-strip bandpass filtering modules block, the third intermediate frequency amplifier also with
The first low pass bandpass filtering modules block connection.
Further, the first PLL chip and the 2nd PLL chip are all made of chip RDA3566E.
Further, the wire signal filter and amplification module includes LC filter module and wire signal amplification module, institute
It states LC filter module to connect with the first F tip side and the wire signal amplification module respectively, the wire signal amplification
Module is connect with the first intermediate frequency amplification module.
Further, the first low noise amplification module is identical with the structure of the second low noise amplification module.
Further, the first low noise amplification module includes that the first low-noise amplifier being connected in series and second are low
Noise amplifier,
First low-noise amplifier is also connect with the vertical polarization signal probe, second low-noise amplifier
Also it is connect with the first micro-strip bandpass filtering modules block.
Further, first low-noise amplifier is identical with the structure of second low-noise amplifier.
CASS feed integration satellite low-converter provided by the utility model, the vertical polarization of feed radiating guide module
Signal probe receives vertical polarization signal, and the horizontal polarization signals probe of feed radiating guide module receives horizontal polarization signals,
And the vertical polarization signal and horizontal polarization signals are separately sent to the first low noise amplification module and the second low noise is put
Big module carries out signal amplification, and the first low noise amplification module and the second low noise amplification module believe amplified vertical polarization
Number and horizontal polarization signals be respectively sent to the first micro-strip bandpass filtering modules block and the second micro-strip bandpass filtering modules block and carry out micro-strip
It is sent to the first PLL chip after bandpass filtering and the mixing frequency reducing of the 2nd PLL chip is amplified again, and is sent to the filter of the first low pass band logical
After wave module and the second low pass bandpass filtering modules block carry out low pass bandpass filtering, two paths of signals is combined through combiner module,
It again after the amplification of the first intermediate frequency amplification module, exports through the 2nd F tip side and is demodulated to set-top box, cable TV signal is from the first F
Tip side input and wire signal filter and amplification module processing after be coupled into the 2nd F tip side export together give set-top box demodulation.
The DRO oscillation module being made of discrete component is replaced using integrated PLL chip, is improved local oscillated signal and is stablized
Property, and product processes are simplified, production efficiency is improved, material cost and cost of labor are reduced.
Detailed description of the invention
Fig. 1 is the circuit block diagram of CASS feed integration satellite low-converter provided by the utility model.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts
Every other embodiment obtained, fall within the protection scope of the utility model.
It is the circuit block diagram of CASS feed integration satellite low-converter provided by the utility model referring to Fig. 1.
The utility model embodiment provides a kind of CASS feed integration satellite low-converter, including feed radiating guide mould
Block, the first low noise amplification module 11, the second low noise amplification module 21, the first micro-strip bandpass filtering modules block 12, the second micro-strip
Bandpass filtering modules block 22, the first PLL chip 13, the 2nd PLL chip 23, the first crystal oscillator X1, the second crystal oscillator X2, the first low pass band logical
Filter module 14, the second low pass bandpass filtering modules block 24, combiner module 5, the first intermediate frequency amplification module 6, wire signal filtering
Amplification module 7, the first F tip side IP1 and the 2nd F tip side OP1；
Feed radiating guide module includes vertical polarization signal probe IPV for receiving vertical polarization signal and for connecing
Receive the horizontal polarization signals probe I PH of horizontal polarization signals；
Vertical polarization signal probe IPV, the first low noise amplification module 11, the first micro-strip bandpass filtering modules block 12, first
PLL chip 13 and the first low pass bandpass filtering modules block 14 are sequentially connected, and the first PLL chip 13 is connected in parallel with the first crystal oscillator X1,
Horizontal polarization signals probe I PH, the second low noise amplification module 21, the second micro-strip bandpass filtering modules block 22, the 2nd PLL chip 23
It is sequentially connected with the second low pass bandpass filtering modules block 24, the 2nd PLL chip 23 is connected in parallel with the second crystal oscillator X2, the first lower passband
Pass filtering module 14 and the second low pass bandpass filtering modules block 24 are connect with combiner module 5, combiner module 5, the first intermediate frequency
Amplification module 6, wire signal filter and amplification module 7 and the first F tip side IP1 are sequentially connected, the first intermediate frequency amplification module 6 also with
2nd F tip side OP1 connection.
In the specific implementation, the vertical polarization signal probe IPV of feed radiating guide module receives vertical polarization signal, feedback
The horizontal polarization signals probe I PH of source radiating guide module receives horizontal polarization signals, and by vertical polarization signal and horizontal pole
Change signal and be separately sent to the first low noise amplification module 11 and the progress signal amplification of the second low noise amplification module 12, first is low
Noise amplification module 11 and the second low noise amplification module 12 distinguish amplified vertical polarization signal and horizontal polarization signals
It is sent to the first micro-strip bandpass filtering modules block 12 and the second micro-strip bandpass filtering modules block 22 is sent to after micro-strip bandpass filtering
First PLL chip 13 and the mixing frequency reducing of the 2nd PLL chip 23 are amplified again, are then retransmited to the first low pass bandpass filtering modules block 14
Pass through low pass bandpass filtering with the second low pass bandpass filtering modules block 24, two paths of signals is combined through combiner module 5, then through the
It after the amplification of one intermediate frequency amplification module 6, exports through the 2nd F tip side OP1 and is demodulated to set-top box, cable TV signal connects from the first F
It head end IP1 input and is coupled into the 2nd F tip side OP1 after the processing of wire signal filter and amplification module 7 and exports together and give machine top
Box demodulation.Traditional DRO oscillation module being made of discrete component is replaced using integrated PLL chip, is not only reduced
The electronic component quantity of circuit reduces PCBA structure, but also wiring is more simple, simplifies manufacturing process；By
It is very weak in the local oscillation frequency signal amplitude of PLL chip leakage, thus the interference adjusted of interaction also can very little, chip has the phase-locked function,
Frequency changes also very little, and outer signals interference, the cross jamming of local oscillation frequency signal are not susceptible to after being integrated into inside chip
Also become smaller, so as to realize repertoire with monolithic wiring board, reduce PCBA structure, and improve local oscillated signal and stablize
Property；The frequency of oscillation of PLL chip is generated after the crystal double frequency by fixed frequency through chip, and chip has the phase-locked function, institute
To vibrate the frequency that frequency out is fixed needs, therefore PLL chip is used, vibration staying is not just had on cover board and swings cavity position,
Without resonance cover frequency modulation screw, screw and point screw glue are saved, adjustment screw frequency process is reduced, so that product processes are simple
Dan Hua improves production efficiency, reduces cost of labor and material cost.
It should be noted that the first end of the first crystal oscillator X1 is connect with the input pin of the first PLL chip 13, the first crystal oscillator X1
Second end connect with the output pin of the first PLL chip 13；The first end of second crystal oscillator X2 and the input pin of the 2nd PLL chip 23
Connection, the second end of the second crystal oscillator X2 are connect with the output pin of the 2nd PLL chip 23.Wherein, the first crystal oscillator X1 and the second crystal oscillator
The effect of X2 is to provide basic frequency of oscillation, the first PLL chip 13 and second for the first PLL chip 13 and the 2nd PLL chip 23
The local oscillating frequency needed after 23 inside frequency multiplication of PLL chip.
Further, the first PLL chip 13 is identical with the structure of the 2nd PLL chip 23.
Further, the first PLL chip 13 includes local oscillator 131, frequency mixer 134,132 and of the second intermediate frequency amplifier
Third intermediate frequency amplifier 134；
Local oscillator 131, the second intermediate frequency amplifier 132 and third intermediate frequency amplifier 133 are connect with frequency mixer 134,
Second intermediate frequency amplifier 132 is also connect with the first micro-strip bandpass filtering modules block 12, third intermediate frequency amplifier 133 also with the first low pass
Bandpass filtering modules block 14 connects.
It should be noted that the first PLL chip 13 is identical with the structure of the 2nd PLL chip 23, so the 2nd PLL chip 23
It also include local oscillator 231, frequency mixer 234, the second intermediate frequency amplifier 232 and third intermediate frequency amplifier 233.
Further, the first PLL chip 13 and the 2nd PLL chip 23 are all made of chip RDA3566E.
Further, wire signal filter and amplification module 7 includes LC filter module 71 and wire signal amplification module 72, LC
Filter module 71 is connect with the first F tip side IP1 and wire signal amplification module 72 respectively, wire signal amplification module 72 and
The connection of one intermediate frequency amplification module 6.
Further, the first low noise amplification module 11 is identical with the structure of the second low noise amplification module 21.
Further, the first low noise amplification module 11 includes the first low-noise amplifier 111 and second being connected in series
Low-noise amplifier 112,
First low-noise amplifier 111 is also connect with vertical polarization signal probe IPV, and the second low-noise amplifier 112 is also
It is connect with the first micro-strip bandpass filtering modules block 12.
It should be noted that the first low noise amplification module 11 is identical with the structure of the second low noise amplification module 21, institute
It also include the first low-noise amplifier 211 and the second low-noise amplifier being connected in series with the second low noise amplification module 21
212.Wherein, the gain range of low-noise amplifier is fixed, and 3 low-noise amplifiers are respectively configured in DRO scheme to be reached
To the gain range requirement of product demand, and amplifier is integrated into chip by PLL chip, so using 2 low noise amplifications
Device can also reach performance requirement, to reduce material cost.
Further, first low-noise amplifier 111 is identical with the structure of second low-noise amplifier 112.
CASS feed integration satellite low-converter provided by the utility model, the vertical polarization of feed radiating guide module
Signal probe receives vertical polarization signal, and the horizontal polarization signals probe of feed radiating guide module receives horizontal polarization signals,
And the vertical polarization signal and horizontal polarization signals are separately sent to the first low noise amplification module and the second low noise is put
Big module carries out signal amplification, and the first low noise amplification module and the second low noise amplification module believe amplified vertical polarization
Number and horizontal polarization signals be respectively sent to the first micro-strip bandpass filtering modules block and the second micro-strip bandpass filtering modules block and carry out micro-strip
It is sent to the first PLL chip after bandpass filtering and the mixing frequency reducing of the 2nd PLL chip is amplified again, and is sent to the filter of the first low pass band logical
After wave module and the second low pass bandpass filtering modules block carry out low pass bandpass filtering, two paths of signals is combined through combiner module,
It again after the amplification of the first intermediate frequency amplification module, exports through the 2nd F tip side and is demodulated to set-top box, cable TV signal is from the first F
Tip side input and wire signal filter and amplification module processing after be coupled into the 2nd F tip side export together give set-top box demodulation.
The DRO oscillation module being made of discrete component is replaced using integrated PLL chip, is improved local oscillated signal and is stablized
Property, and product processes are simplified, production efficiency is improved, material cost and cost of labor are reduced.
The above is preferred embodiments of the present invention, it is noted that for the ordinary skill of the art
For personnel, without departing from the principle of this utility model, several improvements and modifications can also be made, these are improved and profit
Decorations are also considered as the protection scope of the utility model.
Claims (8)
1. a kind of CASS feed integration satellite low-converter, which is characterized in that including feed radiating guide module, the first low noise
Sound amplification module, the second low noise amplification module, the first micro-strip bandpass filtering modules block, the second micro-strip bandpass filtering modules block, first
PLL chip, the 2nd PLL chip, the first crystal oscillator, the second crystal oscillator, the first low pass bandpass filtering modules block, the second low pass bandpass filtering mould
Block, combiner module, the first intermediate frequency amplification module, wire signal filter and amplification module, the first F tip side and the 2nd F tip side；
The feed radiating guide module includes vertical polarization signal probe for receiving vertical polarization signal and for receiving
The horizontal polarization signals probe of horizontal polarization signals；
It is the vertical polarization signal probe, the first low noise amplification module, the first micro-strip bandpass filtering modules block, described
First PLL chip and the first low pass bandpass filtering modules block are sequentially connected, and the first PLL chip and first crystal oscillator are simultaneously
Connection connection, the horizontal polarization signals probe, the second low noise amplification module, the second micro-strip bandpass filtering modules block,
The 2nd PLL chip and the second low pass bandpass filtering modules block are sequentially connected, the 2nd PLL chip and second crystalline substance
Vibration is connected in parallel, the first low pass bandpass filtering modules block and the second low pass bandpass filtering modules block with the combiner mould
Block connection, the combiner module, the first intermediate frequency amplification module, the wire signal filter and amplification module and the first F connect
Head end is sequentially connected, and the first intermediate frequency amplification module is also connect with the 2nd F tip side.
2. CASS feed integration satellite low-converter as described in claim 1, which is characterized in that the first PLL chip
It is identical with the structure of the 2nd PLL chip.
3. CASS feed integration satellite low-converter as claimed in claim 2, which is characterized in that the first PLL chip
Including local oscillator, frequency mixer, the second intermediate frequency amplifier and third intermediate frequency amplifier；
The local oscillator, second intermediate frequency amplifier and the third intermediate frequency amplifier are connect with the frequency mixer,
Second intermediate frequency amplifier is also connect with the first micro-strip bandpass filtering modules block, the third intermediate frequency amplifier also with it is described
The connection of first low pass bandpass filtering modules block.
4. CASS feed integration satellite low-converter as claimed in claim 2, which is characterized in that the first PLL chip
Chip RDA3566E is all made of with the 2nd PLL chip.
5. CASS feed integration satellite low-converter as claimed in claim 1 or 2, which is characterized in that the wire signal
Filter and amplification module includes LC filter module and wire signal amplification module, and the LC filter module connects with the first F respectively
Head end is connected with the wire signal amplification module, and the wire signal amplification module and the first intermediate frequency amplification module connect
It connects.
6. CASS feed integration satellite low-converter as claimed in claim 1 or 2, which is characterized in that first low noise
Sound amplification module is identical with the structure of the second low noise amplification module.
7. CASS feed integration satellite low-converter as claimed in claim 6, which is characterized in that first low noise is put
Big module includes the first low-noise amplifier and the second low-noise amplifier being connected in series,
First low-noise amplifier is also connect with the vertical polarization signal probe, second low-noise amplifier also with
The first micro-strip bandpass filtering modules block connection.
8. CASS feed integration satellite low-converter as claimed in claim 7, which is characterized in that first low noise is put
Big device is identical with the structure of second low-noise amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821269149.XU CN208638350U (en) | 2018-08-08 | 2018-08-08 | A kind of CASS feed integration satellite low-converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821269149.XU CN208638350U (en) | 2018-08-08 | 2018-08-08 | A kind of CASS feed integration satellite low-converter |
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| Publication Number | Publication Date |
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| CN208638350U true CN208638350U (en) | 2019-03-22 |
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| CN201821269149.XU Active CN208638350U (en) | 2018-08-08 | 2018-08-08 | A kind of CASS feed integration satellite low-converter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113541771A (en) * | 2021-07-15 | 2021-10-22 | 广西金网通电子科技有限公司 | Satellite down converter for receiving Beidou signal for households |
-
2018
- 2018-08-08 CN CN201821269149.XU patent/CN208638350U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113541771A (en) * | 2021-07-15 | 2021-10-22 | 广西金网通电子科技有限公司 | Satellite down converter for receiving Beidou signal for households |
| CN113541771B (en) * | 2021-07-15 | 2022-10-28 | 广西金网通电子科技有限公司 | Satellite down converter for receiving Beidou signal for households |
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