CN105657300B - A kind of satellite low noise block circuit and satellite low noise block - Google Patents
A kind of satellite low noise block circuit and satellite low noise block Download PDFInfo
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- CN105657300B CN105657300B CN201610158226.3A CN201610158226A CN105657300B CN 105657300 B CN105657300 B CN 105657300B CN 201610158226 A CN201610158226 A CN 201610158226A CN 105657300 B CN105657300 B CN 105657300B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/50—Tuning indicators; Automatic tuning control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/20—Adaptations for transmission via a GHz frequency band, e.g. via satellite
Abstract
The invention discloses a kind of satellite low noise block circuits, including horizontal signal circuit and vertical signal circuit, the horizontal signal circuit is connect by the first bandpass filter with satellite receiver and/or the vertical signal circuit is connect by the second bandpass filter with the satellite receiver.When using satellite low noise block circuit provided by the invention, the frequency range shielded will be needed to filter out by bandpass filter, selectively shielding is not intended to the frequency range received, and the frequency range of needs is exported, and on the one hand can satisfy the purpose that operator or policy shield a certain segment program；On the other hand, by that the bandwidth of operator can be made narrower after selectivity output, operator's cost is saved.And directly filtered out the frequency range that need to be shielded by satellite low noise block circuit, user terminal can not obtain the frequency range by modes such as software upgradings, therefore shield effectiveness is more reliable.The invention also discloses the satellite low noise blocks that one includes above-mentioned satellite low noise block circuit.
Description
Technical field
The present invention relates to satellite TV technology fields to further relate to one more specifically to a kind of satellite low noise block circuit
Kind includes the satellite low noise block of above-mentioned satellite low noise block circuit.
Background technique
TV is the extremely common equipment of people's daily life, and the one kind of satellite television as TV has and widely answers
With.The transmission process of satellite television generally passes through satellite and transmits the microwave signal that ground base station emits at a distance, final to use
Family is output to a whole set of process of television terminal rating after decoding received signal by decoder using directional aerial.
The reception system of satellite television generally comprises the parts such as satellite antenna, feed, tuner, satellite receiver.Satellite
Receiver is connected by coaxial cable with the tuner on satellite antenna, the microwave signal that tuner reflects back satellite antenna
It feeds back and is handled or decoded in satellite receiver, solve picture-and-sound.Wherein, tuner is also known as low noise frequency reducer
(LNB).The high-frequency signal of its feed waveguide input is amplified by low-noise amplifier, is mixed after filtering with local oscillation signal, is produced
Raw intermediate-freuqncy signal, is connect by cable with satellite receiver, and low noise amplification and frequency conversion function, such as KU wave band input frequency are completed
Rate is 10.7-12.75GHz, and output frequency is 950-2150MHz after tuner frequency reducing.
In general, a satellite possesses multiple transponders, a transponder has multiple downstream frequencies, by multiple groups TV signal group
At.Due to there is multiple programs on same transponder, when operator or policy requirements are not intended to user to see a certain frequency range
When program, a certain frequency range generally is shielded by modifying the software of set-top box.However, due to being shielded by software, user terminal
It is very convenient to carry out software upgrading change, is easy to regain the corresponding program of the frequency range, thus shield effectiveness is poor.
In conclusion how to efficiently solve the problems such as effectively shielding satellite TV signal presets frequency range as needed, it is
Those skilled in the art's urgent problem at present.
Summary of the invention
In view of this, the first purpose of this invention is to provide a kind of satellite low noise block circuit, satellite low noise block electricity
Road can efficiently solve the problem of effectively shielding satellite TV signal presets frequency range as needed, second object of the present invention
It is to provide a kind of satellite low noise block including above-mentioned satellite low noise block circuit.
In order to reach above-mentioned first purpose, the invention provides the following technical scheme:
A kind of satellite low noise block circuit, including horizontal signal circuit and vertical signal circuit, which is characterized in that the level
Signal circuit is connect by the first bandpass filter with satellite receiver and/or the vertical signal circuit passes through the second band logical
Filter is connect with the satellite receiver.
Preferably, in above-mentioned satellite low noise block circuit, the horizontal signal circuit by the first bandpass filter with it is described
Satellite receiver connection, the vertical signal circuit are connect by the second bandpass filter with the satellite receiver, and described
First bandpass filter and second bandpass filter pass through the first power combiner and connect with the satellite receiver.
It preferably, further include final stage intermediate frequency amplifier in above-mentioned satellite low noise block circuit, first power combiner is logical
The final stage intermediate frequency amplifier is crossed to connect with the satellite receiver.
Preferably, in above-mentioned satellite low noise block circuit, the horizontal signal circuit includes for by the horizontal high-frequent of feed
First high-frequency amplifier of signal amplification, the first image frequency rejects trap being connect with first high-frequency amplifier, with
First self oscillating mixer of the first image frequency rejects trap connection, first connect with first self oscillating mixer
Intermediate frequency amplifier；
The vertical signal circuit includes the second high-frequency amplifier for amplifying the vertical high-frequent signal of feed, with institute
The the second image frequency rejects trap for stating the connection of the second high-frequency amplifier, connect with the second image frequency rejects trap
The second self oscillating mixer, the second intermediate frequency amplifier being connect with second self oscillating mixer.
Preferably, in above-mentioned satellite low noise block circuit, the local frequency of first self oscillating mixer is 5150MHz, institute
The local frequency for stating the second self oscillating mixer is 5750MHz.
Preferably, in above-mentioned satellite low noise block circuit, the horizontal signal circuit includes will by the second power combiner
Signal carries out the first level signal circuit and the second horizontal signal circuit that power distribution is divided into, the first level signal circuit
It is connect by the first bandpass filter with the satellite receiver, the second horizontal signal circuit passes through third bandpass filter
It is connect with the satellite receiver；And/or
The vertical signal circuit includes first being hung down by third power combiner by what signal progress power distribution was divided into
Straight signal circuit and the second vertical signal circuit, the first vertical signal circuit pass through the second bandpass filter and the satellite
Receiver connection, the second vertical signal circuit are connect by the 4th bandpass filter with the satellite receiver.
Preferably, in above-mentioned satellite low noise block circuit, the horizontal signal circuit includes first level signal circuit and
Two horizontal signal circuits；
The first level signal circuit includes the first high-frequency amplifier for amplifying the horizontal high-frequent signal of feed,
Second power combiner being connect with first high-frequency amplifier, the first mirror being connect with second power combiner
As frequency rejection filter, the first self oscillating mixer being connect with the first image frequency rejects trap, with described first
First intermediate frequency amplifier of self oscillating mixer connection；
The second horizontal signal circuit includes first high-frequency amplifier, is connect with first high-frequency amplifier
Second power combiner, the third image frequency rejects trap being connect with second power combiner, with described
The third self oscillating mixer of three image frequency rejects traps connection, in the third being connect with the third self oscillating mixer
Audio amplifier.
Preferably, in above-mentioned satellite low noise block circuit, first high-frequency amplifier includes connected the first high frequency of level-one
The first high-frequency amplifier of amplifier and second level.
Preferably, in above-mentioned satellite low noise block circuit, second high-frequency amplifier includes connected the second high frequency of level-one
The second high-frequency amplifier of amplifier and second level.
Satellite low noise block circuit provided by the invention includes horizontal signal circuit and vertical signal circuit.Horizontal signal circuit
Or at least one of vertical signal circuit is connect by bandpass filter with satellite receiver, that is, horizontal signal circuit is logical
Cross that the first bandpass filter is connect with satellite receiver and/or vertical signal circuit is connect by the second bandpass filter with satellite
The connection of receipts machine.
When using satellite low noise block circuit provided by the invention, by the first bandpass filter to the frequency of horizontal signal circuit
Rate is selected, or is selected by frequency of second bandpass filter to vertical signal circuit, and then can be according to fortune
The demand for seeking quotient or client will need the frequency range shielded to filter out by bandpass filter, and selectively shielding is not intended to receive
Frequency range, and the frequency range of needs is exported, it on the one hand can satisfy operator or policy and a certain segment program shielded
Purpose；On the other hand, by that the bandwidth of operator can be made narrower after selectivity output, operator's cost is saved.And pass through
Satellite low noise block circuit directly filters out the frequency range that need to be shielded, and user terminal can not obtain the frequency by modes such as software upgradings
Section, therefore shield effectiveness is more reliable.
In a preferred embodiment, the horizontal signal circuit of satellite low noise block circuit provided by the invention or vertical
Signal circuit is divided into two paths of signals again, and is filtered respectively by bandpass filter, and then by the way that signal is divided into multichannel letter
Number carry out frequency hopping selection only the frequency range of needs is exported according to the specific needs of operator so that the bandwidth of operator is more
It is narrow.And by that multiple high-quality frequency ranges can be integrated output in such a way that frequency hopping selects, be not necessarily to machine after band-pass filter
Top box provides Diseqc signal and carries out frequency range switching.Thus user can give multiple set-top boxes by common power divider
It is interfered using the switching that may be not present between each user.
In order to reach above-mentioned second purpose, the present invention also provides a kind of satellite low noise block, which includes
Any of the above-described kind of satellite low noise block circuit.Since above-mentioned satellite low noise block circuit has above-mentioned technique effect, there is the satellite
The satellite low noise block of high frequency tuner circuit should also have corresponding technical effect.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of structural schematic diagram of specific embodiment of satellite low noise block circuit provided by the invention；
Fig. 2 is the structural schematic diagram of satellite low noise block circuit another kind specific embodiment provided by the invention.
Specific embodiment
The embodiment of the invention discloses a kind of satellite low noise block circuits, pre- with effectively shielding satellite TV signal as needed
If frequency range.
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1, Fig. 1 is a kind of structural representation of specific embodiment of satellite low noise block circuit provided by the invention
Figure.
In a specific embodiment, satellite low noise block circuit provided by the invention includes horizontal signal circuit and vertical
Signal circuit.The part of specific horizontal signal circuit and vertical signal circuit can refer to the prior art, and details are not described herein again.
At least one of horizontal signal circuit or vertical signal circuit are connect by bandpass filter with satellite receiver,
Namely horizontal signal circuit is connect or vertical signal by the first bandpass filter 1-IF filter with satellite receiver
Circuit is connect by the second bandpass filter 2-IF filter with satellite receiver or horizontal signal circuit passes through first band
Bandpass filter 1-IF filter is connect with satellite receiver, and vertical signal circuit passes through the second bandpass filter 2-IF
Filter is connect with satellite receiver.The namely output end of horizontal signal circuit and the first bandpass filter 1-IF filter
Connection, the filter action through the first bandpass filter 1-IF filter export signal to satellite receiver；Or vertical signal
The output end of circuit is connect with the second bandpass filter 2-IF filter, the filtering through the second bandpass filter 2-IF filter
Rental exports signal to satellite receiver.It should be noted that herein and first and second or the like the pass that is mentioned below
It is that term is used merely to distinguish a component with another component, without necessarily requiring or implying between these components
There are any actual relationship or orders.
Above-mentioned satellite low noise block circuit can will need to shield according to operator or the demand of client by bandpass filter
Frequency range filter out, selectively shielding is not intended to the frequency range that receives, and the frequency range of needs is exported, and on the one hand can satisfy
The purpose that operator or policy shield a certain segment program；On the other hand, by that can make to run after selectivity output
The bandwidth of quotient is narrower, saves operator's cost.And directly filtered out the frequency range that need to be shielded by satellite low noise block circuit, it uses
Family end can not obtain the frequency range by modes such as software upgradings, therefore shield effectiveness is more reliable.
Further, horizontal signal circuit can be connected by the first bandpass filter 1-IF filter and satellite receiver
It connects, vertical signal circuit can be connect by the second bandpass filter 2-IF filter with satellite receiver, and the first band logical is filtered
Wave device 1-IF filter and the second bandpass filter 2-IF filter pass through the first power combiner 1-power
Combiner is connect with satellite receiver.Namely horizontal signal circuit and vertical signal circuit is respectively through band-pass filter
Afterwards, it is integrated and is exported by power combiner, and then in the case where meeting set-top box for bandwidth requirement, carried out without set-top box
Frequency range switching.
Further, it can connect final stage intermediate frequency amplifier IF after the first power combiner 1-power combiner
AMP, then the first power combiner 1-power combiner is connect by final stage intermediate frequency amplifier IF AMP with satellite receiver.
Signal after namely power is merged exports after final stage intermediate frequency amplifier IF AMP is amplified, after obtaining frequency stack
Signal.Certainly, final stage intermediate frequency amplifier IF AMP can also be not provided in satellite low noise block circuit as needed, or is being defended
Intermediate frequency amplifier etc. is arranged in star signal receiving end can also.
Specifically, horizontal signal circuit may include the first High frequency amplification for amplifying the horizontal high-frequent signal of feed
Device, the first image frequency rejects trap 1-Image-Rej connecting with the first high-frequency amplifier inhibit with the first image frequency
First self oscillating mixer 1-MIX of filter 1-Image-Rej connection, in first connect with the first self oscillating mixer 1-MIX
Audio amplifier 1-IF AMP, that is, horizontal signal circuit include sequentially connected first high-frequency amplifier, the first image frequency
Rejects trap 1-Image-Rej, the first self oscillating mixer 1-MIX and the first intermediate frequency amplifier 1-IF AMP；Correspondingly, vertical
Signal circuit includes for being connect with the second high-frequency amplifier by the second high-frequency amplifier of the vertical high-frequent signal amplification of feed
The second image frequency rejects trap 2-Image-Rej, connect with the second image frequency rejects trap 2-Image-Rej
Second self oscillating mixer 2-MIX, the second intermediate frequency amplifier 2-IF AMP being connect with the second self oscillating mixer 2-MIX, that is,
Vertical signal circuit includes sequentially connected second high-frequency amplifier, the second image frequency rejects trap 2-Image-Rej,
Two self oscillating mixer 2-MIX and the second intermediate frequency amplifier 2-IF AMP.That is horizontal signal and vertical signal is respectively through antenna, high frequency
Amplifier, image frequency rejects trap, self oscillating mixer and intermediate frequency amplifier output, it is then as needed that signal is directly defeated
It exports out to satellite receiver or after the filtering of bandpass filter to satellite receiver.It certainly, as needed can also be right
Above-mentioned horizontal signal circuit and vertical signal circuit carry out appropriate adjustment, but generally lead to the high-frequency signal that feed waveguide inputs
Low-noise amplifier amplification is crossed, is mixed after filtering with local oscillation signal, intermediate-freuqncy signal is generated, is connected by cable and satellite receiver
It connects.Specifically, the local frequency of self oscillating mixer can specifically need to be configured according to, such as sheet of the first self oscillating mixer
Vibration frequency is 5150MHz, and the local frequency of the second self oscillating mixer is 5750MHz.
On the basis of the various embodiments described above, horizontal signal circuit may include by the second power combiner 2-power
First level signal circuit made of combiner distributes signal power and the second horizontal signal circuit, first level signal electricity
Road is connect by the first bandpass filter 1-IF filter with satellite receiver, and the second horizontal signal circuit passes through third band logical
Filter 3-IF filter is connect with satellite receiver；And/or vertical signal circuit will including passing through third power combiner
Signal power is non-match made of the first vertical signal circuit and the second vertical signal circuit, the first vertical signal circuit pass through second
Bandpass filter 2-IF filter is connect with satellite receiver, and the second vertical signal circuit passes through the 4th bandpass filter and defends
The connection of star receiver.Horizontal signal is namely subjected to power distribution by the second power combiner, is divided at least two paths of signals,
Two paths of signals passes through respectively at the conventional high frequencies head signal such as image frequency rejects trap, self oscillating mixer and intermediate frequency amplifier
Reason；Or vertical signal is subjected to power distribution by third power combiner, it is divided at least two paths of signals, two paths of signals difference
By as the conventional high frequencies head signal processing such as frequency rejection filter, self oscillating mixer and intermediate frequency amplifier；Or simultaneously by water
Ordinary mail number carries out power distribution and is divided into two paths of signals, and vertical signal carries out power distribution and is divided into two paths of signals, then passes through band respectively
Bandpass filter is filtered each road signal, and the frequency range shielded will be needed to filter out.Therefore, it according to the needs of specific client, realizes
Frequency hopping selection, applicability is good, while to occupy bandwidth narrower.Level above signal circuit include first level signal circuit and
Second horizontal signal circuit, specifically, as needed, when selecting if you need to multiband frequency hopping, then may further include will be horizontal
The signal of signal circuit carries out the third horizontal signal circuit after power distribution, the electricity being divided into after specific horizontal signal power distribution
The number on road can select to need to be configured according to specific frequency hopping.Meanwhile it as needed can also be with for vertical signal circuit
Signal progress power distribution is divided into multiple signals, the number of specific multiple signals, which can according to need, to be configured.
Specifically, referring to FIG. 2, Fig. 2 is satellite low noise block circuit another kind specific embodiment provided by the invention
Structural schematic diagram.
In another embodiment specific implementation mode, including first level signal circuit and the second horizontal signal circuit.Wherein,
One horizontal signal circuit includes the first high-frequency amplifier for amplifying the horizontal high-frequent signal of feed, with the first High frequency amplification
Second power combiner 2-power combiner of device connection, connect with the second power combiner 2-power combiner
First image frequency rejects trap 1-Image-Rej, connect with the first image frequency rejects trap 1-Image-Rej
One self oscillating mixer 1-MIX, the first intermediate frequency amplifier 1-IF AMP being connect with the first self oscillating mixer 1-MIX；Second is horizontal
Signal circuit includes the first high-frequency amplifier, the second power combiner 2-power connecting with the first high-frequency amplifier
Combiner, the third image frequency rejects trap 3-Image- being connect with the second power combiner 2-power combiner
Rej, the third self oscillating mixer 3-MIX being connect with third image frequency rejects trap 3-Image-Rej, it is mixed with third local oscillator
The third intermediate frequency amplifier 3-IF AMP of frequency device 3-MIX connection.The signal of horizontal signal circuit is namely divided into two paths of signals,
Specifically, the second power combiner 2-power can be passed through after high-frequency amplifier according to the structure of horizontal signal circuit
The horizontal signal of horizontal signal circuit is replicated and is divided into two-way by combiner, and two paths of signals is respectively through respective mirror image frequency
The filter action of rate rejects trap then respectively forms intermediate-freuqncy signal after local oscillator is mixed, and is amplified respectively by intermediate frequency,
Then exported after the filter action of different bandpass filters respectively.Certainly, as needed, can also mirror image inhibition after or its
Vertical signal is replicated and is divided into two-way by power combiner at his position.Adjustable second power namely as needed
Position of the combiner 2-power combiner in vertical signal circuit.
Correspondingly, also may include the first vertical signal circuit and the second vertical signal circuit for vertical signal circuit.
Wherein the first vertical signal circuit includes the second high-frequency amplifier for amplifying the vertical high-frequent signal of feed, high with second
The third power combiner of audio amplifier connection, the second image frequency rejects trap 2- being connect with third power combiner
Image-Rej, the second self oscillating mixer 2-MIX being connect with the second image frequency rejects trap 2-Image-Rej, with second
Second intermediate frequency amplifier 2-IF AMP of self oscillating mixer 2-MIX connection；Second vertical signal circuit includes the second High frequency amplification
Device, the third power combiner being connect with the second high-frequency amplifier, the 4th image frequency suppression being connect with third power combiner
Filter processed, the 4th self oscillating mixer connecting with the 4th image frequency rejects trap are connect with the 4th self oscillating mixer
4th intermediate frequency amplifier.
Further, the first high-frequency amplifier may include connected level-one the first high-frequency amplifier 1-AMP1 and second level
One high-frequency amplifier 1-AMP2.Namely amplification of the horizontal high-frequent signal of feed first through the first high-frequency amplifier of level-one 1-AMP1
Effect, then the amplification through the first high-frequency amplifier of second level 1-AMP2, to meet semaphore request.Certainly, by level-one the
In the case where semaphore request can be met after the amplification of one high-frequency amplifier 1-AMP1, the first high frequency of level-one can also be only set and put
Big device 1-AMP1.
Further, the second high-frequency amplifier also may include connected level-one the second high-frequency amplifier 2-AMP1 and two
The second high-frequency amplifier 2-AMP2 of grade.Namely the vertical high-frequent signal of feed is first through the second high-frequency amplifier of level-one 2-AMP1's
Amplification, then the amplification through the second high-frequency amplifier of second level 2-AMP2, to meet semaphore request.Certainly, passing through one
In the case where semaphore request can be met after the amplification of the second high-frequency amplifier 2-AMP1 of grade, it is high that can also level-one second be only set
Audio amplifier 2-AMP1.
The satellite low noise block circuit provided in based on the above embodiment, the present invention also provides a kind of satellite low noise blocks, should
Satellite low noise block includes any one satellite low noise block circuit in above-described embodiment.Since the satellite low noise block uses above-mentioned reality
The satellite low noise block circuit in example is applied, so the beneficial effect of the satellite low noise block please refers to above-described embodiment.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (9)
1. a kind of satellite low noise block circuit, including horizontal signal circuit and vertical signal circuit, which is characterized in that the horizontal letter
The first bandpass filter that number circuit passes through for filtering out the frequency range for needing to shield is connect and/or described with satellite receiver
The second bandpass filter that vertical signal circuit passes through for filtering out the frequency range for needing to shield is connect with the satellite receiver,
The horizontal signal circuit includes the first high-frequency amplifier for amplifying the horizontal high-frequent signal of feed, high with described first
First image frequency rejects trap of audio amplifier connection, the first being connect with the first image frequency rejects trap
Shake frequency mixer, the first intermediate frequency amplifier connecting with first self oscillating mixer；
The vertical signal circuit includes for by the second high-frequency amplifier of the vertical high-frequent signal of feed amplification, with described the
Second image frequency rejects trap of two high-frequency amplifiers connection, the connect with the second image frequency rejects trap
Two self oscillating mixers, the second intermediate frequency amplifier being connect with second self oscillating mixer.
2. satellite low noise block circuit according to claim 1, which is characterized in that the horizontal signal circuit passes through first band
Bandpass filter is connect with the satellite receiver, and the vertical signal circuit passes through the second bandpass filter and the satellite reception
Machine connection, and first bandpass filter and second bandpass filter pass through the first power combiner and the satellite
Receiver connection.
3. satellite low noise block circuit according to claim 2, which is characterized in that it further include final stage intermediate frequency amplifier, it is described
First power combiner is connect by the final stage intermediate frequency amplifier with the satellite receiver.
4. satellite low noise block circuit according to claim 1, which is characterized in that the local oscillator frequency of first self oscillating mixer
Rate is 5150MHz, and the local frequency of second self oscillating mixer is 5750MHz.
5. satellite low noise block circuit according to claim 1-4, which is characterized in that the horizontal signal circuit packet
Include the first level signal circuit and the second horizontal signal electricity for being divided into signal progress power distribution by the second power combiner
Road, the first level signal circuit are connect by the first bandpass filter with the satellite receiver, the described second horizontal letter
Number circuit is connect by third bandpass filter with the satellite receiver；And/or
The vertical signal circuit includes the first vertical letter for being divided into signal progress power distribution by third power combiner
Number circuit and the second vertical signal circuit, the first vertical signal circuit pass through the second bandpass filter and the satellite reception
Machine connection, the second vertical signal circuit are connect by the 4th bandpass filter with the satellite receiver.
6. satellite low noise block circuit according to claim 1-4, which is characterized in that the horizontal signal circuit packet
Include first level signal circuit and the second horizontal signal circuit；
The first level signal circuit includes the first high-frequency amplifier for amplifying the horizontal high-frequent signal of feed, with institute
The second power combiner for stating the connection of the first high-frequency amplifier, the first image frequency suppression being connect with second power combiner
Filter processed, the first self oscillating mixer connecting with the first image frequency rejects trap are mixed with first local oscillator
First intermediate frequency amplifier of device connection；
The second horizontal signal circuit includes first high-frequency amplifier, connect with first high-frequency amplifier described in
Second power combiner, the third image frequency rejects trap being connect with second power combiner, with the third mirror
As the third self oscillating mixer that frequency rejection filter connects, the third intermediate frequency connecting with the third self oscillating mixer amplifies
Device.
7. satellite low noise block circuit according to claim 1, which is characterized in that first high-frequency amplifier includes being connected
The first high-frequency amplifier of the first high-frequency amplifier of level-one and second level.
8. satellite low noise block circuit according to claim 1, which is characterized in that second high-frequency amplifier includes being connected
The second high-frequency amplifier of the second high-frequency amplifier of level-one and second level.
9. a kind of satellite low noise block, which is characterized in that including the described in any item satellite low noise block circuits of such as claim 1-8.
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| CN201610158226.3A CN105657300B (en) | 2016-03-18 | 2016-03-18 | A kind of satellite low noise block circuit and satellite low noise block |
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| US10070181B2 (en) * | 2016-07-20 | 2018-09-04 | Microelectronics Technology, Inc. | Power splitter and satellite signal reception system |
| CN106488200B (en) * | 2016-08-05 | 2019-06-18 | 深圳市平方兆赫科技有限公司 | A kind of high frequency tuner circuit and tuner |
| CN108964691A (en) * | 2017-05-26 | 2018-12-07 | 聚晶半导体股份有限公司 | Data transmission system |
| CN212115548U (en) * | 2019-12-27 | 2020-12-08 | 深圳市北斗万方信息技术有限公司 | Low-noise down converter and signal processing system |
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| CN105657300A (en) | 2016-06-08 |
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