CN213638235U

CN213638235U - Special small base station board for LTE mining

Info

Publication number: CN213638235U
Application number: CN202022933966.4U
Authority: CN
Inventors: 张道立; 袁地震; 陈刚
Original assignee: Shenzhen Epsel Information Technology Co ltd
Current assignee: Shenzhen Epsel Information Technology Co ltd
Priority date: 2020-12-09
Filing date: 2020-12-09
Publication date: 2021-07-06
Anticipated expiration: 2030-12-09

Abstract

The utility model relates to a basic station board technical field, in particular to special little basic station board of LTE mining industry, be provided with the baseband processing chip that is used for LTE digital signal to handle in the digital region, a radio frequency transceiver for realizing wide band LTE receiving and dispatching function, be provided with in the radio frequency region and be used for realizing that single way LTE radio frequency signal becomes the power of double-circuit radio frequency signal function and divide the module, LTE binary channels circuit, the radio frequency transceiver is connected in baseband processing chip, the power divides the module to connect in the radio frequency transceiver, LTE binary channels circuit connection divides the module in the power, the digital power module of independent dual supply module sets up in the digital region, a power supply in the digital region, radio frequency power module sets up in the radio frequency region. Compared with the prior art, the utility model discloses a special little basic station board of LTE mining industry satisfies mining covering environment special demand in the pit, satisfies national standard essential safety standard requirement, reduces the engineering complexity, reduces user cost.

Description

Special small base station board for LTE mining

[ technical field ] A method for producing a semiconductor device

The utility model relates to a basic station board technical field, in particular to special little basic station board of LTE mining industry.

[ background of the invention ]

With the development of communication technology, some industry-specific communication also enters the LTE technical field, such as mining industry, and 2G/3G/4G communication network signals of public operators cannot be covered in the underground environment, so that a base station product for satisfying the requirements of the underground environment and providing reliable wireless communication services is necessary.

Before the LTE technology, 2G, 3G, WIFI, and the like are used for downhole communication, and both the technical capability and the device update thereof cannot meet the industry requirements. And the adoption of a general mainstream LTE base station cannot meet the requirements of intrinsic safety specifications of mining industry and cannot meet the requirements of simplification of a two-way coverage by an underground channel type wireless propagation environment, so that the equipment volume and the engineering complexity are high.

[ Utility model ] content

In order to overcome the above problem, the utility model provides a can effectively solve the special little base station board of LTE mining of above-mentioned problem.

The utility model provides a technical scheme who above-mentioned technical problem provided is: the special small base station board for the LTE mining industry comprises a PCB, wherein the PCB comprises a digital area and a radio frequency area, a baseband processing chip for processing an LTE digital signal and a radio frequency transceiver for realizing a broadband LTE receiving and transmitting function are arranged in the digital area, a power division module for realizing the function of converting a single-path LTE radio frequency signal into a double-path radio frequency signal and an LTE double-channel circuit are arranged in the radio frequency area, the radio frequency transceiver is connected with the baseband processing chip, the power division module is connected with the radio frequency transceiver, and the LTE double-channel circuit is connected with the power division module; the PCB board is further provided with an independent dual-power module, the independent dual-power module comprises a digital power module and a radio frequency power module, the digital power module is arranged in a digital area and used for supplying power in the digital area, and the radio frequency power module is arranged in a radio frequency area and used for supplying power in the radio frequency area.

Preferably, the LTE dual-channel circuit includes LTE channel a, and LTE channel a includes transmission channel a, receiving channel a, channel a duplexer, channel a frequency sweep switch, frequency sweep receiving channel C1, transmission channel a, receiving channel a, channel a frequency sweep switch connect respectively in channel a duplexer, and transmission channel a, receiving channel a connect respectively in the power distribution module, frequency sweep receiving channel C1 connect respectively in the power distribution module and channel a frequency sweep switch.

Preferably, the LTE dual-channel circuit includes LTE channel B, and LTE channel B includes transmission channel B, receiving channel B, channel B duplexer, channel B frequency sweep switch, frequency sweep receiving channel C2, transmission channel B, receiving channel B, channel B frequency sweep switch connect respectively in channel B duplexer, and transmission channel B, receiving channel B connect respectively in the power distribution module, frequency sweep receiving channel C2 connect respectively in the power distribution module and channel B frequency sweep switch.

Preferably, the digital area further comprises an ethernet processor, and the ethernet processor is connected to the baseband processing chip.

Preferably, a clock module is further included in the digital region.

Preferably, the model of the baseband processing chip is T2130.

Preferably, the model of the radio frequency transceiver is AD 9363.

Preferably, the ethernet processor is model RTL 8211E.

Compared with the prior art, the utility model discloses a special little basic station board of LTE mining industry has following beneficial effect:

1. the LTE full service including uplink and downlink data capacity, VoLTE voice service, VoLTE video service and the like is realized, and all service requirements of underground communication are met;

2. the dual-channel technology is adopted, each channel meets the requirements of transmitting power 1/4W, filtering of an uplink channel and a downlink channel and a built-in duplexer, and an antenna port integrating receiving and transmitting is adopted; by using the whole machine product of the utility model, the back-to-back bidirectional antenna is connected on the double-channel antenna port in engineering, so that the channel type effective coverage can be realized; therefore, except for the small base station board, the cooperation of other radio frequency front-end equipment is not needed, the product and the engineering are simplified, and the cost is optimal;

3. adopt independent dual supply independent power supply, digit and radio frequency GND keep apart completely, satisfy the requirement of national standard essence safety standard, use the utility model discloses a complete machine product has been imitated and has been passed through corresponding trade safety certificate.

[ description of the drawings ]

Fig. 1 is a circuit structure block diagram of the LTE mining dedicated small base station board of the present invention;

fig. 2 is a schematic circuit diagram of a transmitting part of the power division module of the LTE mining dedicated small base station board of the present invention;

fig. 3 is a schematic circuit diagram of a PA amplifier of a transmitting channel a of the LTE mining dedicated small base station board of the present invention;

fig. 4 is a schematic circuit diagram of a channel a duplexer of the LTE mining dedicated small base station board of the present invention;

FIG. 5 is a schematic diagram of the circuit from the channel A of the LTE mining dedicated small base station board to the antenna port of the utility model;

fig. 6 is a schematic diagram of a receiving circuit of the LTE channel a of the LTE dedicated small base station board for LTE mining of the present invention;

fig. 7 is a schematic diagram of an independent dual power module input circuit of the LTE mining dedicated small base station board of the present invention;

fig. 8 is a circuit of the utility model, which transforms the voltage of the digital power module of the special small base station board for the LTE mining industry to 3.3V;

fig. 9 is the circuit of the utility model discloses the special little base station board of LTE mining industry's radio frequency power module vary voltage to 5.0V.

[ detailed description ] embodiments

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and the following embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

It should be noted that all directional indications (such as up, down, left, right, front, and back … …) in the embodiments of the present invention are limited to relative positions on a given view, not absolute positions.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

Please refer to fig. 1, the utility model discloses a special little basic station board of LTE mining industry, including the PCB board, the PCB board includes digital region and radio frequency region, be provided with in the digital region and be used for LTE digital signal processing's baseband processing chip, be used for realizing the radio frequency transceiver of wide band LTE receiving and dispatching function, be provided with in the radio frequency region and be used for realizing that single way LTE radio frequency signal becomes power division module, the LTE binary channels circuit of double-circuit radio frequency signal function, the radio frequency transceiver is connected in baseband processing chip, and power division module connects in the radio frequency transceiver, and LTE binary channels circuit connects in power division module. The PCB board is further provided with an independent dual-power module, the independent dual-power module comprises a digital power module and a radio frequency power module, the digital power module is arranged in a digital area and used for supplying power in the digital area, and the radio frequency power module is arranged in a radio frequency area and used for supplying power in the radio frequency area. The digital power supply module and the radio frequency power supply module comprise independent input interfaces respectively and respectively complete the functions of power supply protection, filtering, voltage transformation and the like. The digital area and the radio frequency area are respectively provided with independent power supplies, and the respective GND circuits are also completely isolated.

The LTE dual-channel circuit comprises an LTE channel A and an LTE channel B, wherein the LTE channel A comprises a transmitting channel A, a receiving channel A, a channel A duplexer, a channel A frequency sweeping switch and a frequency sweeping receiving channel C1, the transmitting channel A, the receiving channel A and the channel A frequency sweeping switch are respectively connected to the channel A duplexer, the transmitting channel A and the receiving channel A are respectively connected to the power distribution module, and the frequency sweeping receiving channel C1 is respectively connected to the power distribution module and the channel A frequency sweeping switch. The LTE channel B comprises a transmitting channel B, a receiving channel B, a channel B duplexer, a channel B frequency sweep switch and a frequency sweep receiving channel C2, wherein the transmitting channel B, the receiving channel B and the channel B frequency sweep switch are respectively connected to the channel B duplexer, the transmitting channel B and the receiving channel B are respectively connected to the power distribution module, and the frequency sweep receiving channel C2 is respectively connected to the power distribution module and the channel B frequency sweep switch.

The digital area also comprises an Ethernet processor which is connected with the baseband processing chip and used for network connection. The digital area also comprises a clock module which is used for providing clock signals to meet the requirements of the chip.

The model of the baseband processing chip is T2130; the model of the radio frequency transceiver is AD 9363; the Ethernet processor is of type RTL 8211E. The utility model discloses a special little basic station board of LTE mining industry satisfies mining covering environment special demand in the pit, satisfies national standard essential safety standard requirement, reduces the engineering complexity, reduces user cost.

Referring to fig. 2, differential transmission signals TX1A-N and TX1A-P from the RF transceiver AD9363 are processed by the Balun device B2 to form a complete TX signal, which enters the ANT port of the power division module and is divided into two paths to be output from the RF1 and RF2 ports as TX-RF1-C1 signals and TX-RF2-C1 signals, which are identical.

Referring to fig. 3, the TX-RF1-C1 signal from fig. 2 enters the RFIN port of the signal amplifier Q30 of the transmit channel a, is amplified and then jointly output from the RFOUT1-3, and the output signal is above 1/4W. The TX-RF2-C1 signals have the same amplification in the other transmit channel B. Wherein the signal amplifier Q30 receives the control signal PA-TX1A to control and adjust the gain of the amplifier.

Referring to fig. 4, the amplified TX-RF1-C1 signal from fig. 3 enters the TX-RF1-C2 signal path after being processed by the path a duplexer F4. In the opposite direction, the channel A duplexer F4 splits the received signal in the TX-RF1-C2 channel into the RX1-RF1-C2 signal.

Referring to fig. 5, the RF signal entering from the antenna port ANT0 is processed by the channel a frequency sweep switch SW1 and then divided into two paths, one path is the working signal TX-RF1-C2 of the LTE channel a, and the path is connected to the circuit in fig. 4. The other path is a sweep frequency signal RX1-RF2-C2 of the LTE channel A. The channel A sweep switch selects a channel under the control of control signals ANT-SW-TX (working state) and ANT-SW-RX (sweep state).

Referring to fig. 6, the RX1-RF1-C2 signal separated from fig. 4 enters pin 6 of the filter device F1, and then enters pin 3 of the low noise amplifier device Q5 to be processed into RX1-RF1-C1 signal, which is then converted into differential RX signals RX1A-N and RX1A-P to enter the RF transceiver AD9363 after being processed by the power division module and the Balun device. Wherein the low noise amplifier Q5 is controlled by a control signal LNA-RX1-A to adjust the amplifier gain.

In the circuits shown in fig. 2-6, similar processing occurs for LTE channel B, swept receive channel C1, and swept receive channel C2.

Referring to fig. 7, J2 is connected to an external power source to generate a 12V input VIN — 12V in the digital domain. J3 is connected to an external power source to generate a 12V input VIN — 12V _ RF in the radio frequency domain.

Referring to fig. 8, a voltage transformation device U121 processes a 12V power input VIN — 12V in a digital domain to generate a 3.3V signal 3V 3. The same processing circuitry, the digital area power supply, also generates 1.8V, 1.5V and 1.1V signals.

Referring to fig. 9, a 12V power input VIN — 12V in the rf domain is processed by a transformer U4 to generate a 5.0V signal 5V 0.

The above description is only for the preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications made within the spirit of the present invention, equivalent replacements and improvements should be included in the scope of the present invention.

Claims

The LTE mining special small base station board is characterized by comprising a PCB, wherein the PCB comprises a digital area and a radio frequency area, a base band processing chip for processing LTE digital signals and a radio frequency transceiver for realizing a broadband LTE transceiving function are arranged in the digital area, a power division module for realizing the function of converting single-path LTE radio frequency signals into double-path radio frequency signals and an LTE double-channel circuit are arranged in the radio frequency area, the radio frequency transceiver is connected with the base band processing chip, the power division module is connected with the radio frequency transceiver, and the LTE double-channel circuit is connected with the power division module;

the PCB board is further provided with an independent dual-power module, the independent dual-power module comprises a digital power module and a radio frequency power module, the digital power module is arranged in a digital area and used for supplying power in the digital area, and the radio frequency power module is arranged in a radio frequency area and used for supplying power in the radio frequency area.
2. The LTE mining-specific small base station board of claim 1, wherein the LTE dual-channel circuit comprises an LTE channel A, the LTE channel A comprises a transmitting channel A, a receiving channel A, a channel A duplexer, a channel A sweep switch, and a sweep receiving channel C1, the transmitting channel A, the receiving channel A, and the channel A sweep switch are respectively connected to the channel A duplexer, the transmitting channel A, the receiving channel A are respectively connected to the power division module, and the sweep receiving channel C1 is respectively connected to the power division module and the channel A sweep switch.
3. The LTE mining-specific small base station board of claim 1, wherein the LTE dual-channel circuit comprises an LTE channel B, the LTE channel B comprises a transmitting channel B, a receiving channel B, a channel B duplexer, a channel B sweep switch, and a sweep receiving channel C2, the transmitting channel B, the receiving channel B, and the channel B sweep switch are respectively connected to the channel B duplexer, the transmitting channel B and the receiving channel B are respectively connected to the power division module, and the sweep receiving channel C2 is respectively connected to the power division module and the channel B sweep switch.
4. The LTE mining specific small base station board of claim 1, further comprising an ethernet processor within the digital area, the ethernet processor connected to a baseband processing chip.
5. The LTE mining specific small base station board of claim 1, further comprising a clock module within said digital area.
6. The LTE mine specific small base station board of claim 1, wherein the baseband processing chip has a model number T2130.
7. The LTE mine specific small base station board of claim 1, wherein the radio frequency transceiver is model AD 9363.
8. The LTE mine specific small base station board of claim 4, wherein the Ethernet processor is model RTL 8211E.