CN218416383U - PCBA module for realizing broadband satellite signal transmission - Google Patents

Abstract

The utility model discloses a PCBA module for realizing broadband satellite signal transmission, which comprises a PCBA board and a circuit module arranged on the PCBA board, wherein the circuit module comprises a DAC transmitter, the input end of the DAC transmitter is used for inputting satellite signals to be transmitted, and the output end of the DAC transmitter outputs the satellite signals to be transmitted after digital-to-analog conversion; the DAC transmitter comprises at least two DUC channels, a combiner connected with the output ends of the DUC channels and a DAC channel connected with the output end of the combiner, and the sampling rate of the DAC channel is 12.6Gsps.

Description

PCBA module for realizing broadband satellite signal transmission

Technical Field

The utility model belongs to the technical field of the satellite communication product, concretely relates to realize PCBA module of broadband satellite signal transmission.

Background

Satellite communication is space microwave communication between radio communication stations on earth (including in the land, water and lower atmosphere) using artificial satellites as relay stations, and is the inheritance and development of terrestrial microwave relay communication.

The radio communication station receives and retransmits the satellite signal, and the satellite signal needs to be received, collected, processed and the like. Satellite signal bands can be generally divided into c-band, ku-band, ka-band, S-band, L-band, etc., and each band is defined as follows:

1) The c wave band is a section of frequency band with the frequency of 4.0-8.0 GHz and is used as the frequency band of the downlink transmission signal of the communication satellite;

2) Ku band, wherein the downlink of Ku band is from 10.7 to 12.75GHz, and the uplink is from 12.75 to 18.1GHz;

3) A Ka band, a portion of the microwave band of the electromagnetic spectrum, the frequency range of the Ka band being 26.5-40GHz;

4) The S wave band refers to an electromagnetic wave frequency band with the frequency range of 1.55-3.4 GHz;

5) The L-band is a radio wave band with a frequency of 1-2 GHz according to the IEEE 521-2002 standard, and belongs to millimeter waves.

In high density satellite transmitter, proposed special requirement to the broadband transmission, required the broadband signal of launching the L frequency channel, avoided a plurality of equipment combination to accomplish the broadband signal transmission, just under this prerequisite, proposed the utility model discloses the technical scheme who describes.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the purpose here provides a realize PCBA module of broadband satellite signal transmission, this module can launch 950MHz ~ 2150 MHz's broadband satellite signal, need not to dispose a plurality of equipment combination and accomplishes broadband signal transmission.

Therefore, the PCBA module for realizing broadband satellite signal transmission comprises a PCBA board and a circuit module arranged on the PCBA board, wherein the circuit module comprises a DAC transmitter, the input end of the circuit module is used for inputting satellite signal data to be transmitted, and the output end of the circuit module outputs satellite signals to be transmitted after digital-to-analog conversion; the DAC transmitter comprises at least two DUC channels, a combiner connected with the output ends of the DUC channels and a DAC channel connected with the output end of the combiner, and the sampling rate of the DAC channel is 12.6Gsps.

In some embodiments, the circuit module further comprises a programmable gain control module for gain amplifying or attenuating the signal output by the DAC transmitter, including a gain amplifier and a programmable attenuator.

In some embodiments, the circuit module further comprises a programmable filter array for filtering the signal output by the programmable gain control module, including a plurality of wideband band pass filters.

In some embodiments, the circuit module further comprises a signal generation circuit that generates satellite signal data to be transmitted, the signal generation circuit comprising:

the ARM circuit is used for receiving the network data from the data interface circuit and extracting service data to be sent;

and the FPGA circuit receives the service data output by the ARM circuit, performs coding and modulation processing, generates a digital baseband signal and transmits the digital baseband signal to the DAC transmitter.

In some embodiments, the data interface circuit comprises a fiber optic connector.

In some embodiments, further comprising ethernet PHY circuitry coupled to said ARM circuitry, including an ethernet PHY and a network connector RJ45; the ARM circuit is also respectively connected with other functional modules on the circuit module, and provides an ETH interface for management for a user.

In some embodiments, the system further comprises a clock circuit for generating a plurality of clock frequency signals to be provided to the required functional modules as reference clocks, including a constant temperature crystal oscillator and a phase-locked loop.

In some embodiments, the PCBA further comprises a shielding cover, and the shielding cover is mounted on the upper portion of the PCBA and is in contact with components forming the circuit module through heat-conducting silica gel.

In some embodiments, the shield is divided into several sub-cavities for separating different functional modules constituting the circuit module.

In some embodiments, the shield is in a fin structure.

Adopt the technical scheme of the utility model, the technological effect that can reach includes at least:

1) The utility model provides a module utilizes sampling frequency to send the ware for 12.6Gsps 'DAC, has realized carrying out the full sampling to the signal in 950MHz ~ 2150MHz bandwidth, realizes 950MHz ~ 2150 MHz's broadband satellite signal transmission with an equipment, has avoided a plurality of equipment combination to accomplish the broadband signal transmission, has practiced thrift equipment cost, has reduced the equipment volume, has improved the reliability of equipment.

2) The utility model discloses separate the different functional modules that constitute circuit module through dividing the cavity, realized the isolation between the functional module, reduced the influence each other between the functional module to a certain extent, increased the radio frequency reliability of PCBA module.

3) The utility model provides a module radiating effect.

4) The utility model discloses a modular structure, it is small, light in weight, the maintenance of being convenient for, use once more after can directly changing when the module breaks down after maintaining.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

fig. 1 is a schematic block diagram of a circuit module in a PCBA module provided by the present invention;

FIG. 2 is an internal layout view of a PCBA module provided by the present invention;

fig. 3 is a top view of a PCBA module provided by the present invention;

fig. 4 is a plan view of the appearance of the shield case according to the present invention;

fig. 5 is a bottom view of the outer appearance of the shield case according to the present invention.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art.

In a high-density satellite transmitter, special requirements are provided for broadband transmission, broadband signals of an L frequency range are required to be transmitted, the situation that a plurality of devices are combined to complete broadband signal transmission is avoided, the cost and the size of the device are saved, and the reliability is improved. The present disclosure addresses the need for a high density satellite transmitter, providing a PCBA module for transmitting a wideband satellite signal in the L frequency band, the PCBA module being modular in design, unified in interface and encapsulated.

The PCBA module of the present disclosure mainly implements a function of transmitting a 950MHz to 2150MHz broadband satellite signal, and as shown in fig. 1, the PCBA module includes a PCBA board and a circuit module disposed thereon, and the circuit module includes functional circuits: the Ethernet PHY circuit, the ARM circuit, the FPGA circuit, the DAC sender, the programmable gain control module, the programmable filter array, the data interface circuit, the clock circuit and the RF interface, wherein the functions of the functional circuits are as follows:

a) The Ethernet PHY circuit comprises an Ethernet PHY circuit and a network connector RJ45 serving as a management interface, so that the transmission of management data is realized, the network connector RJ45 is used for being connected with an upper computer, and the management data formed by operating the upper computer is accessed into the Ethernet PHY circuit through the network connector RJ45 and is transmitted to the ARM circuit.

b) The ARM circuit receives network data from the data interface circuit through the high-speed SERDES interface, extracts service data to be sent, and outputs the service data to the FPGA circuit through the high-speed PCIE interface; the ARM circuit is used for respectively connecting the DAC transmitter, the programmable gain module and the programmable filter array through serial interfaces, and management data formed by the upper computer is used for respectively controlling the DAC transmitter, the programmable gain module and the programmable filter array through the ARM circuit; the ARM circuit provides an ETH interface for management for the user, connected to the ethernet PHY.

c) The FPGA circuit receives data through a high-speed PCIE interface, performs processing such as line coding and modulation on the data to generate a digital baseband signal, and outputs the digital baseband signal to the DAC transmitter through a high-speed JESD204B interface.

d) The DAC transmitter comprises 8 high-speed data interface channels, 8 DUC channels, 1 combiner and 1 DAC channel, the sampling rate is 12.6Gsps, satellite signal data to be transmitted input into the DAC transmitter is subjected to digital up-conversion through the DUC channels, and then digital-analog conversion is carried out after the satellite signal data is converged through the combiner, so that digital up-conversion, convergence and digital-analog conversion (D/A conversion) of a digital baseband signal are realized, and an L-band broadband satellite signal containing a plurality of carrier signals can be generated.

e) The programmable gain control module is composed of a gain amplifier and a programmable attenuator, and is used for performing gain amplification and attenuation on the radio-frequency signal output by the DAC transmitter, so that the strength of the transmitted signal is ensured.

f) The programmable filter array comprises band-pass filters (BPF) with various bandwidths, and the filter with the proper bandwidth can be selected according to the frequency and the bandwidth of the output signal to obtain better signal output.

g) The data interface circuit mainly comprises an optical fiber connector and transmits service data to be transmitted to the ARM circuit at the maximum rate of 10 Gbps.

h) The clock circuit comprises an oven controlled crystal oscillator (OCXO) and a phase-locked loop (PLL) and generates various clock frequency signals which are provided for the DAC transmitter and the FPGA circuit to serve as reference clocks.

i) And the RF interface is used for transmitting the broadband satellite signals of 950 MHz-2150 MHz.

It is understood that the modules of the present disclosure, which include all the functional modules described above, or only some of the functional modules described above, may include an RF interface and a DAC transmitter, where an input end of the DAC transmitter is used for data input of a satellite signal to be transmitted, and an output end of the DAC transmitter outputs a satellite signal to be transmitted after digital-to-analog conversion; or comprises an RF interface, a DAC transmitter and a programmable gain control module; or, comprises an RF interface, a DAC transmitter, a programmable gain control module, and a programmable filter array; or an RF interface, a DAC transmitter, a programmable gain control module, a programmable filter array, an ARM circuit, and an FPGA circuit.

In the disclosure, when the device is configured with the interface circuit, the ARM circuit and the FPGA circuit, the device can be connected with an upper computer through the data interface circuit and the management interface circuit; and data (to-be-transmitted radio-frequency signals) generated by the operation of the upper computer are input into the ARM circuit through the data interface circuit, are processed by the ARM circuit and then are input into the FPGA circuit for coding and modulation processing to form to-be-transmitted radio-frequency signals and then are input into the DAC transmitter. Of course, the radio frequency signal to be transmitted input to the DAC transmitter may also be generated by other devices.

In addition, through the operation of the upper computer, a management instruction can be sent out and input into the ARM circuit through the management interface circuit, so that the parameter configuration or the working state control of the DAC transmitter, the programmable gain module and the programmable filter array is realized respectively.

The layout of the functional circuits/modules on the PCBA board is shown in fig. 2, and the PCBA board includes the following components:

1) The connector comprises a MCX female connector 1 used as an RF interface, an optical fiber connector 5 used as a data interface circuit and connected with an ARM circuit, a network connector 6 used as a network connector RJ45 and a power connector 15 used for power supply access;

2) A circuit module: the clock circuits 10 and 11 are respectively a constant temperature crystal oscillator and a phase-locked loop PLL, a programmable gain module 3, a programmable filter array 2, a DAC transmitter 4, an FPGA circuit 13, an ARM circuit 8, an Ethernet PHY circuit 7, and power circuits 9, 12 and 14 connected with a power connector 15; the power supply circuit is used for carrying out dc-dc conversion or ac-dc conversion on the connected power supply to form 3.3v, 5v, 12v and other voltages to be supplied to required functional circuits/modules.

The PCBA module of this disclosure still includes the shield cover, and this shield cover is installed on PCBA board upper portion, and the shield cover contacts together through heat conduction silica gel pad with the main chip that is shown in figure 2, is favorable to heat conduction, has guaranteed job stabilization nature, then reuse screw fastening, as shown in figure 3.

In the present disclosure, the appearance of the shielding case is as shown in fig. 4 and 5, the shielding case is shaped as a fin 16, and a power connector opening 18 matched with the power connector 15 is distributed on the shielding case, so as to facilitate power access; fiber connector openings 21 for mating with fiber connectors 5 for assembly of fiber connectors 5, network connector openings for mating with network connectors 6 for assembly of network connectors 6, bosses 22, and mounting holes 17 for mating with screws, provide for fastening to the PCBA board.

In order to increase the radio frequency reliability of the PCBA module, the shielding case is further divided into a plurality of sub-cavities 19, and the layout of the circuit module on the PCBA board enables a radio frequency circuit (a DAC transmitter, a programmable gain control module, a programmable filter array and the like), a digital circuit (an ARM circuit, an FPGA circuit and the like) and a clock circuit to be respectively located in the different sub-cavities 19, so that the radio frequency circuit, the digital circuit and the clock circuit are isolated, and the radio frequency reliability of the PCBA board is increased.

This shield cover of disclosure adopts the fin and with main between the chip contact together through heat conduction silica gel pad, increased PCBA's heat dispersion.

The PCBA module of this disclosure assembles in the transmitter, can realize the broadband signal of transmission L frequency channel, avoids a plurality of equipment combinations to accomplish the broadband signal transmission.

The above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and modifications or equivalent replacements made by those of ordinary skill in the art to the technical solutions of the present invention are all covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.

Claims (10)

1. A PCBA module for realizing broadband satellite signal transmission is characterized by comprising a PCBA board and a circuit module arranged on the PCBA board, wherein the circuit module comprises a DAC transmitter, the input end of the DAC transmitter is used for inputting satellite signal data to be transmitted, and the output end of the DAC transmitter outputs satellite signals to be transmitted after digital-to-analog conversion; the DAC transmitter comprises at least two DUC channels, a combiner connected with the output ends of the DUC channels and a DAC channel connected with the output end of the combiner, and the sampling rate of the DAC channel is 12.6Gsps.

2. A PCBA module implementing broadband satellite signal transmission according to claim 1, wherein the circuit module further comprises a programmable gain control module for gain amplifying or attenuating the signal output by the DAC transmitter, including a gain amplifier and a programmable attenuator.

3. A PCBA module implementing broadband satellite signal transmission according to claim 2, wherein the circuit module further comprises a programmable filter array for filtering the signal output by the programmable gain control module, including a bandpass filter of a plurality of broadband.

4. A PCBA module implementing broadband satellite signal transmission according to any one of claims 1 to 3, wherein the circuit module further comprises signal generation circuitry to generate satellite signal data to be transmitted, the signal generation circuitry comprising:

the ARM circuit is used for receiving the network data from the data interface circuit and extracting service data to be sent;

and the FPGA circuit receives the service data output by the ARM circuit, performs coding and modulation processing on the service data, generates a digital baseband signal and transmits the digital baseband signal to the DAC transmitter.

5. A PCBA module implementing broadband satellite signal transmission according to claim 4, in which the data interface circuit comprises a fibre optic connector.

6. The PCBA module in accordance with claim 4, further comprising an Ethernet PHY circuit connected to the ARM circuit, including an Ethernet PHY and a network connector RJ45; the ARM circuit is also respectively connected with other functional modules on the circuit module, and provides an ETH interface for management for a user.

7. A PCBA module for implementing broadband satellite signal transmission according to any one of claims 1 to 3, further comprising clock circuitry for generating a plurality of clock frequency signals for supply to the required functional modules as reference clocks, including a crystal oven and a phase locked loop.

8. The PCBA module for realizing broadband satellite signal transmission according to claim 1, further comprising a shielding case, wherein the shielding case is mounted on the upper portion of the PCBA board and is in contact with components forming the circuit module through heat-conducting silica gel.

9. A PCBA module implementing broadband satellite signal transmission according to claim 8, wherein the shield is divided into several sub-cavities for separating different functional modules constituting the circuit module.

10. A PCBA module implementing broadband satellite signal transmission according to claim 8, wherein the shield is of a fin construction.

Images