CN205864595U - A kind of tuner cavity and tuner - Google Patents
A kind of tuner cavity and tuner Download PDFInfo
- Publication number
- CN205864595U CN205864595U CN201620677462.1U CN201620677462U CN205864595U CN 205864595 U CN205864595 U CN 205864595U CN 201620677462 U CN201620677462 U CN 201620677462U CN 205864595 U CN205864595 U CN 205864595U
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- China
- Prior art keywords
- tuner
- frequency
- cavity
- loading plate
- signal
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Abstract
The utility model discloses a kind of tuner cavity and tuner.This tuner cavity includes waveguide, the waveguide mouth being connected respectively and loading plate with described waveguide two ends, and described loading plate is provided with some wiring holes and some screw holes.The high-frequency signal of the tuner transmission employing the transmission of this tuner is not easily susceptible to the interference of closed-loop path of metal loading plate, and low cost of manufacture, perfect heat-dissipating.
Description
Technical field
This utility model relates to microwave communication field, particularly relates to a kind of tuner cavity and tuner.
Background technology
The effect of tuner is to receive satellite TV signal, and carries out channel selection, signal amplification and down conversion process, finally
Export the device of stable intermediate-freuqncy signal.But, high-frequency signal impedance is high, is easily subject to the closed-loop path that metal loading plate is formed
Interference；And the full-enclosed structure that uses of existing metal loading plate is also unfavorable for the heat radiation of tuner inner member, also
Increase the material cost of tuner.
Utility model content
In order to solve above-mentioned the deficiencies in the prior art, this utility model provides a kind of tuner cavity and tuner.This height
Frequently the high-frequency signal that head cavity body can make tuner transmit is not easily susceptible to the interference of the closed-loop path of metal loading plate, and manufactures
Low cost, perfect heat-dissipating.
Technical problem to be solved in the utility model is achieved by the following technical programs:
A kind of tuner cavity, described tuner cavity includes waveguide, the ripple being connected respectively with described waveguide two ends
Leading mouth and loading plate, described loading plate is provided with some wiring holes and some screw holes.
Further, described loading plate uses the design of part hollow out.
A kind of tuner, including above-mentioned tuner cavity and be arranged on the wiring board on described tuner cavity.
Further, described wiring board includes the rf signal reception module being sequentially connected with, radiofrequency signal amplification module, penetrates
Frequently signal filtering module, local oscillator resonance modules, frequency mixing module, frequency multiplication interference signal filtering module, intermediate frequency amplification module, switching are opened
Pass, output port group and power supply circuits.
Further, described rf signal reception module includes horizontally-polarized antenna and vertical polarized antenna.
Further, described frequency multiplication interference signal filtering module includes LC filter circuit or/and microstrip line three rank band leads to filter
Ripple device.
Further, described radiofrequency signal amplification module includes first stage amplifier, two-stage amplifier and third stage amplifier.
Further, described radiofrequency signal filtration module includes power splitter, high freguency bandpass filter and low-frequency band pass filter
Device.
Further, described local oscillator resonance modules includes high-frequency circuit and low-frequency resonant circuit.
Further, described output port group connects external DVB group, and each DVB is respectively connected with by power supply circuits
One regulator block, each two regulator block connects a compound diode, and described compound diode is connected with intermediate frequency amplification module.
This utility model has the advantages that the loading plate of this tuner cavity is provided with grounding screw hole, will carrying
Plate is connected to ground, it is possible to well prevent the closed-loop path of loading plate from disturbing high-frequency signal；Loading plate uses part hollow out to set
Meter can reduce material cost, and perfect heat-dissipating.
Accompanying drawing explanation
Fig. 1 is the structure schematic diagram of this utility model tuner cavity；
Fig. 2 is the Facad structure schematic diagram of this utility model tuner cavity；
Fig. 3 is the connection block diagram of the wiring board of this utility model tuner；
Fig. 4 is two grades of intermediate frequency amplifiers of this utility model wiring board, output port group and the connection frame of external DVB group
Figure；
Fig. 5 is the wiring board circuit theory diagrams of this utility model tuner；
Fig. 6 is radiofrequency signal filtration module in Fig. 5, local oscillator resonance modules, frequency mixing module, frequency multiplication interference signal filtering mould
Block, the enlarged drawing of one-level intermediate frequency amplifier；
Fig. 7 is two grades of intermediate frequency amplifiers in Fig. 5, switching switch, output port group and the enlarged drawing of power supply circuits；
Fig. 8 is the enlarged drawing of compound diode in Fig. 5.
Detailed description of the invention
With embodiment, this utility model is described in detail below in conjunction with the accompanying drawings.
Embodiment 1
A kind of tuner cavity, as illustrated in fig. 1 and 2, described tuner cavity include waveguide 15, respectively with described waveguide
The waveguide mouth 16 of pipe 15 two ends connection and loading plate 17, described loading plate 17 is provided with some wiring holes 18 and some screw holes
19。
Increasing described screw hole 19, can strengthen iron covering ground connection, enhancing signal shields, it is possible to well prevent described loading plate
High-frequency signal is disturbed by the closed-loop path of 17.
Preferably, described loading plate 17 opposite side uses the design of part hollow out, can reduce material cost, and thermal diffusivity
Can be good.
Embodiment 2
A kind of tuner, including tuner cavity and be arranged on the wiring board on described tuner cavity.
As illustrated in fig. 1 and 2, described tuner cavity includes waveguide 15, is connected with described waveguide 15 two ends respectively
Waveguide mouth 16 and loading plate 17, described wiring board is arranged on described loading plate 17, and described loading plate 17 is provided with some wiring
Hole 18 and some screw holes 19.Increasing described screw hole 19, can strengthen iron covering ground connection, enhancing signal shields, it is possible to well prevent
Only high-frequency signal is disturbed by the closed-loop path of described loading plate 17.Preferably, described loading plate 17 opposite side uses part hollow out
Design, can reduce material cost, and perfect heat-dissipating.
As shown in figures 3-8, described wiring board includes that the rf signal reception module 1 being sequentially connected with, radiofrequency signal amplify mould
Block 2, radiofrequency signal filtration module, local oscillator resonance modules, frequency mixing module 8, intermediate frequency amplification module, switching switch 11, output port
Group 12 and power supply circuits 13.Described output port group 12 connects external DVB group, and described DVB group is responsible for connecing radiofrequency signal
Receive and process and be decoded into audio signal and video signal, and give supplying power for tuner by power supply circuits 13.
Wherein, described rf signal reception module 1 includes horizontally-polarized antenna and vertical polarized antenna, is respectively used to receive
Ku waveband radio frequency signal on space level and vertical direction, ku audio range frequency is 10.7 ~ 12.75GHz；Described radiofrequency signal is put
Big module 2 includes first stage amplifier, two-stage amplifier and third stage amplifier, for amplifying the ku waveband radio frequency signal received；
Described radiofrequency signal filtration module includes power splitter 3, high freguency bandpass filter 4 and low frequency bandpass filter 5, and merit is divided
The device 3 ku waveband radio frequency signal after amplifying is divided into low-frequency band (10.7GHz ~ 11.7GHz) and high frequency band
(11.7GHz ~ 12.75GHz), high/low band-pass filter, for filtering low-frequency band and high frequency band, filters low frequency
Radiofrequency signal beyond wave band and high frequency band；
Described local oscillator resonance modules includes high-frequency circuit 6 and low-frequency resonant circuit 7, is respectively used to low-frequency band defeated
Enter the low frequency local oscillator of 9.75GHz, the high-frequency local oscillation to high frequency band input 10.6GHz；
Described frequency mixing module 8 is used for mixing low-frequency band and low frequency local oscillator, high frequency band and high-frequency local oscillation, and obtains four tunnels
Intermediate-freuqncy signal (0.95GHz, 1.95GHz, 1.1GHz, 2.15GHz)；
Described intermediate frequency amplification module includes one-level intermediate frequency amplifier 9 and two grades of intermediate frequency amplifiers 10, for amplifying in four tunnels
Frequently signal；
Described switching switch 11 is 4*4 switching switch 11, be positioned at one-level intermediate frequency amplifier 9 and two grades of intermediate frequency amplifiers 10 it
Between, for the switching of four tunnel intermediate-freuqncy signals is controlled；
Described output port group 12 includes four output ports, is respectively used to export four tunnel intermediate-freuqncy signals, four outfans
Mouth DVB external with four respectively is connected, and the reception frequency of DVB is 0.95 ~ 2.15GHz.
Preferably, between described frequency mixing module 8 and intermediate frequency amplification module, it is also associated with frequency multiplication interference signal filtering module 14,
Described frequency multiplication interference signal filtering module 14 includes LC filter circuit or/and microstrip line three rank band filter, is used for four tunnels
Intermediate-freuqncy signal filters, times frequency interference signal beyond four tunnel intermediate-freuqncy signals produced during filtering mixing frequency reducing.
Described LC filter circuit is by inductance component L: 27nH and capacitor C:1.2pF is serially connected ground connection and is formed；Described
Microstrip line three rank band filter is formed by three rank 50 Ω microstrip lines, and its size is respectively long 1.26mm width 1mm, long 0.75mm width
1mm, long 0.85mm width 1mm.
By the frequency multiplication interference signal filtering module formed combined by LC filter circuit and microstrip line three rank band filter
14, a frequency multiplication and two frequencys multiplication that radiofrequency signal and the mixing of local oscillator resonance can be subtracted each other institute's appendix in the intermediate-freuqncy signal of Hou tetra-tunnel are done
Scrambling point is decayed and is suppressed, thus realizes the filtration of times frequency interference signal in four tunnel intermediate-freuqncy signals and improve four road intermediate frequencies
The Q-value of signal；Mono-times of frequency multiplication clutter of 850MHZ in four tunnel intermediate-freuqncy signals can be carried out decay suppression by described LC filter circuit,
Reduce and suppress frequency multiplication to play the dB value of dot frequency, thus reducing the interference to receiving effective frequency 950MHZ of the frequency multiplication clutter
Purpose；Described microstrip line three rank band filter can suppress 1700MHZ 2 octave frequency noise jamming.
Preferably, described DVB group is in the power supply circuits 13 of supplying power for tuner, and each DVB is all connected by power supply circuits 13
Being connected to a regulator block, each two regulator block is connected in two grades of a compound diode, described compound diode and front end
Audio amplifier 10 connects.
During described wiring board completes reception and transmission processes radiofrequency signal, described external DVB group is defeated
Going out the decoding end of signal, be also the power end of tuner, described regulator block is electric to the work that elements at different levels offer is stable for DVB
Pressure, described compound diode is altered for preventing DVB from reversely returning to the running voltage that elements at different levels export.
In the prior art, alter for preventing regulator block from reversely returning to the running voltage that each anterior member of wiring board exports,
Each regulator block is respectively connected with a unilateral diode, and any one-channel signal is both needed to mate unilateral diode through regulator block output
Power to chips at different levels and amplifier；When four road signal regulator blocks are respectively configured unilateral diode, high-frequency circuit configuration
Area occupied is big, and material cost is high；Because overall work circuit layout exists commonality components and parts, therefore four road voltages are defeated through regulator block
When going out running voltage, using similar separate mode wiring, there is multiway intersection in Ge Duan supply line and intermediate-freuqncy signal outlet line,
When intermediate-freuqncy signal circuit intersects with element manipulation supply line, although have placement electric capacity or resistance to carry out jumping and put and filter, but
Low-frequency current interference signal subsidiary in supply line, can produce line to IF output signal equally and strongly disturb, such as: produce corresponding
The clutter effect of parasitic capacitance, stray inductance etc.
At voltage after regulator block voltage stabilizing exports, the voltage connections input port that compound diode is formed is by originally
Four tunnels become two-way, DVB supply line significantly reduces with IF output signal cross point, thus when realizing pcb board layout, defeated
The power supply circuits 13 of the intermediate-freuqncy signal outlet line and DVB that go out port are effectively isolated, and improve the anti-interference energy of the signal of product own
Power and stability, and reduce the area of circuit, simplify circuit design.
Embodiment described above only have expressed embodiment of the present utility model, and it describes more concrete and detailed, but also
Therefore the restriction to this utility model the scope of the claims can not be interpreted as, as long as using equivalent or the form institute of equivalent transformation
The technical scheme obtained, all should fall within protection domain of the present utility model.
Claims (10)
1. a tuner cavity, it is characterised in that described tuner cavity include waveguide, respectively with described waveguide two ends
The waveguide mouth connected and loading plate, described loading plate is provided with some wiring holes and some screw holes.
Tuner cavity the most according to claim 1, it is characterised in that described loading plate uses the design of part hollow out.
3. a tuner, it is characterised in that include the tuner cavity described in claim 1 or 2 and be arranged on described high frequency
Wiring board on head cavity body.
Tuner the most according to claim 3, it is characterised in that described wiring board includes that the radiofrequency signal being sequentially connected with connects
Receive module, radiofrequency signal amplification module, radiofrequency signal filtration module, local oscillator resonance modules, frequency mixing module, times frequency interference signal filter
Mode block, intermediate frequency amplification module, switching switch, output port group and power supply circuits.
Tuner the most according to claim 4, it is characterised in that described rf signal reception module includes horizontal polarization sky
Line and vertical polarized antenna.
Tuner the most according to claim 4, it is characterised in that described frequency multiplication interference signal filtering module includes that LC filters
Circuit is or/and microstrip line three rank band filter.
Tuner the most according to claim 4, it is characterised in that described radiofrequency signal amplification module includes that one-level is amplified
Device, two-stage amplifier and third stage amplifier.
Tuner the most according to claim 4, it is characterised in that described radiofrequency signal filtration module includes power splitter, height
Band-pass filter and low frequency bandpass filter.
Tuner the most according to claim 4, it is characterised in that described local oscillator resonance modules include high-frequency circuit and
Low-frequency resonant circuit.
Tuner the most according to claim 4, it is characterised in that described output port group connects external DVB group,
Each DVB is respectively connected with a regulator block by power supply circuits, and each two regulator block connects a compound diode, described multiple
Close diode to be connected with intermediate frequency amplification module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620677462.1U CN205864595U (en) | 2016-07-01 | 2016-07-01 | A kind of tuner cavity and tuner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620677462.1U CN205864595U (en) | 2016-07-01 | 2016-07-01 | A kind of tuner cavity and tuner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205864595U true CN205864595U (en) | 2017-01-04 |
Family
ID=57644129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620677462.1U Expired - Fee Related CN205864595U (en) | 2016-07-01 | 2016-07-01 | A kind of tuner cavity and tuner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205864595U (en) |
-
2016
- 2016-07-01 CN CN201620677462.1U patent/CN205864595U/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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170104 Termination date: 20210701 |