CN216700191U

CN216700191U - Tuner with Beidou positioning function applied to fourth-generation set top box

Info

Publication number: CN216700191U
Application number: CN202220086742.0U
Authority: CN
Inventors: 王平
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-01-13
Filing date: 2022-01-13
Publication date: 2022-06-07
Anticipated expiration: 2032-01-13

Abstract

The utility model discloses a tuner with a Beidou positioning function, which is applied to a fourth-generation set top box and comprises: the satellite signal receiving probe and the Beidou antenna are integrated on one circuit board, wherein the satellite signal receiving probe is used for receiving satellite signals, is subjected to cascade amplification through a cascade amplifier and then outputs the satellite signals to a phase-locked loop unit, the phase-locked loop unit is subjected to frequency adjustment and then outputs intermediate-frequency signals, and the intermediate-frequency signals are attenuated through a band-stop filter and then output to an F-head connector; the Beidou antenna is used for receiving Beidou positioning signals, amplifying the Beidou positioning signals through the first low noise amplifier and the second low noise amplifier in sequence and then outputting the amplified Beidou positioning signals to the F-head connector, the F-head connector transmits satellite signals and the Beidou positioning signals to the fourth-generation set top box through the coaxial cable, and the fourth-generation set top box demodulates video signals and audio signals. The tuner of the utility model has high stability, low noise and high gain, and can be suitable for receiving various satellite programs with strong and weak signals.

Description

Tuner with Beidou positioning function applied to fourth-generation set top box

Technical Field

The utility model relates to the technical field of digital signal processing, in particular to a tuner with a Beidou positioning function, which is applied to a fourth-generation set top box.

Background

With the popularization of the global direct broadcast satellite television industry, the satellite transmission service is developing towards the high-frequency-band, digital and broadband multimedia integrated service, and the demand of consumers for the service is increasing. The direct broadcast satellite television system is a complete satellite ground station which consists of a parabolic antenna, a satellite tuner and a satellite digital set-top box.

The tuner is a device used by a television set to receive high-frequency signals and demodulate video information, and is also a first part of a public channel. The existing tuner has the following problems:

1. the existing tuner can only support the use of a third-generation satellite digital set top box, and a third-generation machine is a standard definition set top box, so that the requirements of users can not be met gradually in the era that the current high definition requirements are great. And the third generation set-top box adopts a positioning-free technology, so that potential safety hazards exist and the monitoring by related departments is not facilitated.

2. The core component of the tuner in the current market consists of a ceramic surface acoustic wave filter and an antenna module, wherein the antenna module adopts a ceramic antenna module or an antenna formed by die sinking punch forming. These core components have problems, for example, the ceramic saw filters are relatively expensive. The ceramic antenna module is difficult to process and manufacture, is easy to collide and break, seriously influences electrical characteristic parameters, and is high in cost. The stamping forming antenna has higher precision and more strict requirements on each size, provides high-difficulty requirements for manufacturing workers, has some potential safety hazards in operation, is inconvenient to assemble, has larger framework volume and weight of the whole product, and has larger waste in raw material cost.

Therefore, the utility model provides the tuner with the Beidou positioning function, which can be applied to the fourth-generation set top box.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a tuner with a Beidou positioning function, which is applied to a fourth-generation set top box and aims to solve the technical problem.

The utility model is realized by the following steps:

a tuner with big dipper locate function for fourth generation STB includes: a satellite signal receiving probe, a satellite signal processing unit, a Beidou antenna and a Beidou signal processing unit which are integrated on a circuit board,

the satellite signal processing unit comprises a cascade amplifier, a phase-locked loop unit and a band-stop filter which are sequentially connected in series, the satellite signal receiving probe is used for receiving satellite signals, the satellite signals are output to the phase-locked loop unit after being subjected to cascade amplification through the cascade amplifier, intermediate-frequency signals are output after being subjected to frequency adjustment through the phase-locked loop unit, and the intermediate-frequency signals are output to the F-head connector after being attenuated through the band-stop filter;

the Beidou signal processing unit comprises a first low-noise amplifier and a second low-noise amplifier which are sequentially connected in series, the Beidou antenna is used for receiving a Beidou positioning signal and sequentially outputs the Beidou positioning signal to the F-head connector after the first low-noise amplifier and the second low-noise amplifier amplify and process, and the F-head connector transmits the satellite signal and the Beidou positioning signal to the fourth-generation set top box through a coaxial cable so as to demodulate a video signal and an audio signal by the fourth-generation set top box.

Further, the satellite signal receiving probe includes a vertically polarized probe and a horizontally polarized probe.

Further, the cascade amplifier comprises a third low noise amplifier, a fourth low noise amplifier and a radio frequency amplifier, wherein the input end of the third low noise amplifier is connected with the vertical polarization probe, the input end of the fourth low noise amplifier is connected with the horizontal polarization probe, and the output ends of the third low noise amplifier and the fourth low noise amplifier are connected with the radio frequency amplifier.

Furthermore, the phase-locked loop unit comprises a phase-locked loop IC, a local oscillator and an intermediate frequency amplifier, wherein the local oscillator is used for generating reference frequency for the phase-locked loop IC so that the phase-locked loop IC can carry out frequency modulation on the signal output by the cascade amplifier, and the intermediate frequency signal is output after the frequency modulation is carried out through the intermediate frequency amplifier.

Further, the Beidou antenna is manufactured by adopting a plate washing process.

Furthermore, the high-frequency head also comprises a three-terminal voltage stabilizer which is used for providing working voltage for the high-frequency head.

Further, the three-terminal regulator adopts an LM78L06 chip.

Compared with the prior art, the utility model has the beneficial effects that: according to the utility model, the Beidou antenna, the Beidou signal processing unit, the satellite signal receiving probe and the satellite signal processing unit are integrated together, so that the volume of a tuner is reduced, and the satellite signal receiving and Beidou positioning functions are realized; in addition, the band elimination filter is adopted to replace an expensive ceramic surface acoustic wave filter, and the antenna manufactured by the plate washing process is adopted to replace a ceramic antenna and a punch forming antenna, so that the cost is greatly reduced, the production efficiency is improved, and the manufacturing is simple; the tuner has the advantages of being high in stability, low in noise and high in gain performance, and can adapt to satellite program receiving of various strong and weak signals.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic circuit diagram of the tuner of the present invention;

fig. 2 is an overall circuit diagram of the tuner of the present invention.

Wherein, 1, vertically polarizing the probe; 2. horizontally polarizing the probe; 3. a third low noise amplifier; 4. a fourth low noise amplifier; 5. a radio frequency amplifier; 6. a phase-locked loop; 7. a filter; 8. a three-terminal voltage stabilizer; 9. a Beidou antenna; 10. a first low noise amplifier; 11. a second low noise amplifier; 12. and F-shaped connector.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in fig. 1, a tuner with beidou positioning function applied to a fourth generation set-top box includes: a satellite signal receiving probe, a satellite signal processing unit, a Beidou antenna 9 and a Beidou signal processing unit which are integrated on a circuit board,

the satellite signal processing unit comprises a cascade amplifier, a phase-locked loop 6 unit and a band-stop filter 7 which are sequentially connected in series, the satellite signal receiving probe is used for receiving satellite signals, the satellite signals are output to the phase-locked loop 6 unit after being subjected to cascade amplification through the cascade amplifier, intermediate-frequency signals are output after being subjected to frequency adjustment through the phase-locked loop 6 unit, and the intermediate-frequency signals are output to an F-head connector 12 after being attenuated through the band-stop filter 7;

big dipper signal processing unit is including the first low noise amplifier 10 and the second low noise amplifier 11 that establish ties in proper order, big dipper antenna 9 is used for receiving big dipper positioning signal, and will big dipper positioning signal loops through first low noise amplifier 10 and the 11 enlargies of second low noise amplifier handle back output extremely F head connector 12, F head connector 12 will satellite signal and big dipper positioning signal transmit the fourth generation STB through coaxial cable, in order by video signal and audio signal are demodulated out to the fourth generation STB. The four-generation computer is of high-definition standard, and can bring better experience to users.

Further, the satellite signal receiving probe comprises a vertically polarized probe 1 and a horizontally polarized probe 2.

Further, the cascade amplifier comprises a third low noise amplifier 3, a fourth low noise amplifier 4 and a radio frequency amplifier 5, wherein the input end of the third low noise amplifier 3 is connected with the vertical polarization probe 1, the input end of the fourth low noise amplifier 4 is connected with the horizontal polarization probe 2, and the output ends of the third low noise amplifier 3 and the fourth low noise amplifier 4 are connected with the radio frequency amplifier 5.

Further, phase-locked loop 6 unit includes phase-locked loop 6IC, local oscillator and intermediate frequency amplifier, local oscillator be used for phase-locked loop 6IC produces reference frequency, with by phase-locked loop 6IC carries out the frequency modulation to the signal of cascade amplifier output, passes through after the frequency modulation intermediate frequency amplifier carries out the mixing back output intermediate frequency signal.

Further, the Beidou antenna 9 is manufactured by a plate washing process.

Further, the tuner further comprises a three-terminal regulator 8 for providing working voltage for the tuner.

Further, the three-terminal regulator 8 adopts an LM78L06 chip.

In a specific embodiment, as shown in fig. 2, the circuit structure for implementing a tuner specifically comprises a satellite part and a beidou part, wherein the satellite part integrates a cascade amplifier, a phase-locked loop unit and a band-stop filter together through an integrated chip RDA3566, and is provided with some peripheral circuits composed of capacitance resistors, a vertical polarization antenna RF-H and a horizontal polarization antenna RF-V are respectively connected with the chip RDA3566 through a field effect transistor, and the beidou antenna sends beidou positioning signals to an F-head connector through a first low-noise amplifier 34D and a second low-noise amplifier 35D.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a be applied to tuner that has big dipper locate function of fourth generation STB which characterized in that includes: a satellite signal receiving probe, a satellite signal processing unit, a Beidou antenna and a Beidou signal processing unit which are integrated on a circuit board,

the satellite signal processing unit comprises a cascade amplifier, a phase-locked loop unit and a band-stop filter which are sequentially connected in series, the satellite signal receiving probe is used for receiving satellite signals, the satellite signals are output to the phase-locked loop unit after being subjected to cascade amplification through the cascade amplifier, intermediate-frequency signals are output after the frequency of the phase-locked loop unit is adjusted, and the intermediate-frequency signals are output to an F-head connector after being attenuated through the band-stop filter;

the Beidou signal processing unit comprises a first low noise amplifier and a second low noise amplifier which are sequentially connected in series, the Beidou antenna is used for receiving a Beidou positioning signal and sequentially outputs the Beidou positioning signal to the F-head connector after the Beidou positioning signal is amplified and processed by the first low noise amplifier and the second low noise amplifier, and the F-head connector transmits the satellite signal and the Beidou positioning signal to the fourth-generation set top box through a coaxial cable so as to demodulate a video signal and an audio signal by the fourth-generation set top box.

2. The tuner with Beidou positioning function applied to the fourth generation set top box according to claim 1, wherein the satellite signal receiving probes comprise a vertical polarization probe and a horizontal polarization probe.

3. The tuner applied to the fourth generation set top box and having the beidou positioning function as claimed in claim 2, wherein the cascade amplifier comprises a third low noise amplifier, a fourth low noise amplifier and a radio frequency amplifier, an input end of the third low noise amplifier is connected to the vertical polarization probe, an input end of the fourth low noise amplifier is connected to the horizontal polarization probe, and output ends of the third low noise amplifier and the fourth low noise amplifier are connected to the radio frequency amplifier.

4. The tuner with the Beidou positioning function applied to the fourth generation set top box according to claim 1, wherein the phase-locked loop unit comprises a phase-locked loop IC, a local oscillator and an intermediate frequency amplifier, the local oscillator is used for generating a reference frequency for the phase-locked loop IC, so that the phase-locked loop IC performs frequency modulation on a signal output by the cascade amplifier, and the frequency modulated signal is subjected to frequency mixing by the intermediate frequency amplifier and then outputs an intermediate frequency signal.

5. The tuner with the Beidou positioning function applied to the fourth-generation set top box according to claim 1, wherein the Beidou antenna is an antenna manufactured by a plate washing process.

6. The tuner with the Beidou positioning function applied to the fourth generation set top box according to claim 1, wherein the tuner further comprises a three-terminal regulator for providing working voltage for the tuner.

7. The tuner with the Beidou positioning function applied to the fourth-generation set top box according to claim 6, wherein the three-terminal regulator adopts an LM78L06 chip.