CN208754330U - NB-IOT signal of communication enhances circuit in a kind of Internet of Things netlist tool - Google Patents
NB-IOT signal of communication enhances circuit in a kind of Internet of Things netlist tool Download PDFInfo
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- CN208754330U CN208754330U CN201821531365.7U CN201821531365U CN208754330U CN 208754330 U CN208754330 U CN 208754330U CN 201821531365 U CN201821531365 U CN 201821531365U CN 208754330 U CN208754330 U CN 208754330U
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Abstract
The utility model relates to NB-IOT signals of communication in a kind of Internet of Things netlist tool to enhance circuit, and including NB-IOT communication module group, filter network and antenna, the output end of the NB-IOT communication module group is connected by the filter network with the antenna；The filter network includes PE4259 switch, first order π type filter network and second level frequency-selective network.The utility model=comply with the emerging technology that current Internet of Things communicates, reduce influence of the external environment frequency range to NB equipment, simultaneously because the increase of selectivity, the sensitivity of signal is increased simultaneously, prevent external interference signal, it ensures that signal is efficiently entering in equipment in NB sections, and signal can be screened by external network under conditions of not changing module internal structure, be a kind of simple and very high technological means of cost performance；The products application of the utility model is in extensive range, can be applied to the application scenarios of all kinds of water, gas and electricities, heat and all types of industries instrument field.
Description
Technical field
The utility model relates to NB-IOT signal of communication enhancings in field of communication technology, in particular to a kind of Internet of Things netlist tool
Circuit.
Background technique
Substantial increase trend year by year is presented in Internet of Things industry at present, and the annual internet of things product that refills is doubled and redoubled, with
Before be 2G network be main several biography means, but with the explosive growth of Internet of Things, originally 2G network cannot win
Appoint, and 2G network modules power consumption is big, and penetration capacity is poor, and 2G network has begun and exits with the development of communication technologies
Network is replaced by the NB-IOT technology of new more power saving and big transmission range.
NB-IOT is a kind of data transfer mode based on mobile UNICOM's telecomm base station, and NB-IOT is new types of data transmission side
Formula was risen in 2016, and since base station and the perfect of core net are fully finished not yet, the transformation of partial region base station and upgrading do not have
There is completion, so the communication signal of NB-IOT and communication coverage area are smaller at present, cannot reach and be completely covered and reach completely
To equipment transmission desired signal requirement, so needing to carry out the enhancing of signal in the NB equipment of part, Another reason is exactly NB
Frequency range nearby have a part of frequency range of ISM, most of equipment of ISM band is all the power bracket work more than national regulation at present
Make, it is bigger on the influence of NB equipment, it needs to carry out band bandwidth to NB equipment according to the reason of these two aspects selectively to enhance,
Influence of the external environment frequency range to NB equipment is reduced, simultaneously because the increase of selectivity, while the sensitivity of signal is increased, it hinders
Only external interference signal ensures that signal is efficiently entering in equipment in NB sections.
Utility model content
To solve the above-mentioned problems, the utility model proposes NB-IOT signal of communication enhancing electricity in a kind of Internet of Things netlist tool
Road, complies with the emerging technology of current Internet of Things communication, and can pass through outside under conditions of not changing module internal structure
Network screens signal, is a kind of simple and cost performance very high technological means.
To achieve the goals above, the utility model has following constitute:
NB-IOT signal of communication enhances circuit, including NB-IOT communication module group, filter network and day in Internet of Things netlist tool
The output end of line, the NB-IOT communication module group is connected by the filter network with the antenna；
The filter network includes PE4259 switch, first order π type filter network and second level frequency-selective network, and described second
Grade frequency-selective network is bandpass filter, and the RFC pin of the PE4259 switch is connected to the antenna, the first order π type net
The first end of network is connected with the RF2 pin that PE4259 is switched, and the second end of the first order pin network and the second level are selected
The first end of frequency network is connected, and the second end of the second level frequency-selective network is connected with the end RF of the NB-ITO communication module group
It connects.
Optionally, the first order π type filter network includes capacitor C20, capacitor C21 and inductance L05, the capacitor C21
First end be connected respectively with the first end of the inductance L05 and the PE4259 RF2 pin switched, the capacitor C21
Second end be connected respectively with the first end of capacitor C20 and ground terminal, the second end of the capacitor C20 respectively with the inductance
The second end of L05 is connected with the first end of the second level frequency-selective network.
Optionally, the end RFC of the PE4259 switch is connected by capacitor C22 with the antenna.
Optionally, the second level frequency-selective network includes capacitor C19 and inductance L04, the first end of the capacitor C19 and institute
The second end for stating capacitor C20 is connected, and the first end of the inductance L04 is connected with the first end of the capacitor C19, the electricity
The second end of sense L04 is connected with the second end of the capacitor C19 and is connected to the end RF of the NB-IOT communication module group.
Optionally, the circuit further includes main control chip and electric power management circuit, the main control chip and the NB-IOT
Communication module group is connected, and the electric power management circuit is NB-IOT communication module group power supply by the main control chip.
Optionally, the main control chip uses PIC16LF1947 chip, the 29th pin of the PIC16LF1947 chip
Clock circuit is connected to the 30th pin.
Optionally, the clock circuit includes capacitor C35, capacitor C36 and crystal oscillator X02, the PIC16LF1947 chip
29th pin is connected to the first end of the capacitor C35, and the 30th pin of the PIC16LF1947 chip is connected to capacitor C36
First end, the second end ground connection of the second end of the capacitor C35 and capacitor C36, the first end and capacitor of the capacitor C35
The crystal oscillator X02 is connected between the first end of C36.
Optionally, the NB-IOT communication module group include NB-IOT communication chip, capacitor C38, resistance R41, resistance R42,
Resistance R43, resistance R39, resistance R40, triode Q03 and LED light LED03, in which:
18th pin of the NB-IOT communication chip is connected to the end VCC by resistance R39, and the of NB-IOT communication chip
19 pins are connected to the end VCC by resistance R40, and the 16th pin of NB-IOT communication chip is grounded by LED light LED03, three poles
The first end of pipe Q03 is connected to the 7th pin of NB-IOT communication chip, and the second end of triode Q03 is grounded, triode Q03's
Third end is respectively connected to the first end of resistance R43 and the first end of resistance R42, the second end ground connection of resistance R43, and NB-IOT leads to
40th pin of news chip is connected to the 43rd pin of NB-IOT communication chip by capacitor C38, and the of NB-IOT communication chip
1 pin is grounded by resistance R41.
The beneficial effects of the utility model are mainly reflected in:
The technical solution of the utility model complies with the emerging technology of current Internet of Things communication, reduces external environment frequency range to NB
The influence of equipment, simultaneously because the increase of selectivity, while the sensitivity of signal is increased, external interference signal is prevented, is ensured
Signal is efficiently entering in equipment in NB sections, and can under conditions of not changing module internal structure by external network come pair
Signal is screened, and is a kind of simple and very high technological means of cost performance；The products application of the utility model is in extensive range, can
To be applied to the application scenarios of all kinds of water, gas and electricities, heat and all types of industries instrument field.
Detailed description of the invention
Fig. 1 is the structural frames that NB-IOT signal of communication enhances circuit in the Internet of Things netlist tool of an embodiment of the present invention
Figure；
Fig. 2 is the structural schematic diagram of the filter network of an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of the main control chip of an embodiment of the present invention；
Fig. 4 is the structural schematic diagram of the NB-IOT communication module group of an embodiment of the present invention.
Specific embodiment
In order to more clearly describe the technology contents of the utility model, carry out combined with specific embodiments below into one
The description of step.
As shown in Figure 1, the utility model provides NB-IOT signal of communication enhancing circuit in a kind of Internet of Things netlist tool, including
The output end of NB- IOT communication module group, filter network and antenna, the NB-IOT communication module group passes through the filter network and institute
Antenna is stated to be connected；
The filter network includes PE4259 switch, first order π type filter network and second level frequency-selective network, and described second
Grade frequency-selective network is bandpass filter, and the RFC pin of the PE4259 switch is connected to the antenna A01, the first order π type
The first end of network is connected with the RF2 pin that PE4259 is switched, the second end of the first order pin network and the second level
The first end of frequency-selective network is connected, the end the RF phase of the second end of the second level frequency-selective network and the NB-ITO communication module group
Connection.
As shown in Fig. 2, the structural schematic diagram of the filter network for an embodiment of the present invention.The first order π type filter
Wave network includes capacitor C20, capacitor C21 and inductance L05, the first end of the capacitor C21 respectively with the inductance L05 first
End be connected with the PE4259 RF2 pin switched, the second end of the capacitor C21 respectively with the first end of capacitor C20 and
Ground terminal is connected, the second end of the capacitor C20 respectively with the second end of the inductance L05 and the second level frequency-selective network
First end be connected.
Further, the end RFC of the PE4259 switch is connected by capacitor C22 with the antenna A01.
Further, the second level frequency-selective network includes capacitor C19 and inductance L04, the first end of the capacitor C19 with
The second end of the capacitor C20 is connected, and the first end of the inductance L04 is connected with the first end of the capacitor C19, described
The second end of inductance L04 is connected with the second end of the capacitor C19 and is connected to the RF of the NB-IOT communication module group
End.
The filtering principle of the present embodiment are as follows: the signal that antenna induction is come in, by entering front end after HF switch PE4259
Filter network, front network form first order π type filter network by capacitor C20, capacitor C21, inductance L05, and network bandwidth is
70MHZ, center bin 859MHZ carry out being filtered decaying to the spurious signal outside NB band, and then useful signal is into the
Second level frequency-selective network, the network are that the 859MHZ of capacitor C19 and capacitor L04 composition is the bandpass filter of resonance point, will
The resonance signal of 850MHZ passes through, and out of band signal decaying, pad value is greater than 60DM, and useful signal enters after two stage filter
The mould end group RF carries out information demodulation, by testing that before filtering, band external equipment interference not will lead to communication success rate decline
43%, after filtering is added, in the case of same external interference, communication success rate is 98.7%.Sufficiently demonstrate addition filter network
Afterwards, communication effect is obviously improved.
Filter network choosing value is as follows:
L05=3.3nH, L04=2.2Nh；
C19=4.7P, C20=3p, C21=6.8p.
As shown in Figure 1, the circuit further includes main control chip and electric power management circuit, the main control chip and the NB-
IOT communication module group is connected, and the electric power management circuit is NB-IOT communication module group power supply by the main control chip.
As shown in figure 3, the structural schematic diagram of the main control chip for an embodiment of the present invention.The main control chip uses
PIC16LF1947 chip, the 29th pin and the 30th pin of the PIC16LF1947 chip are connected to clock circuit.In the reality
It applies in example, the clock circuit includes capacitor C35, capacitor C36 and crystal oscillator X02, and the 29th of the PIC16LF1947 chip is drawn
Foot is connected to the first end of the capacitor C35, and the 30th pin of the PIC16LF1947 chip is connected to the first of capacitor C36
The of the second end ground connection of end, the second end of the capacitor C35 and capacitor C36, the first end of the capacitor C35 and capacitor C36
The crystal oscillator X02 is connected between one end.
As shown in figure 4, the structural schematic diagram of the NB-IOT communication module group for an embodiment of the present invention.The NB-IOT
Communication module group include NB-IOT communication chip, capacitor C38, resistance R41, resistance R42, resistance R43, resistance R39, resistance R40,
Triode Q03 and LED light LED03, in which:
18th pin of the NB-IOT communication chip is connected to the end VCC by resistance R39, and the of NB-IOT communication chip
19 pins are connected to the end VCC by resistance R40, and the 16th pin of NB-IOT communication chip is grounded by LED light LED03, three poles
The first end of pipe Q03 is connected to the 7th pin of NB-IOT communication chip, and the second end of triode Q03 is grounded, triode Q03's
Third end is respectively connected to the first end of resistance R43 and the first end of resistance R42, the second end ground connection of resistance R43, and NB-IOT leads to
40th pin of news chip is connected to the 43rd pin of NB-IOT communication chip by capacitor C38, and the of NB-IOT communication chip
1 pin is grounded by resistance R41.
In the Internet of Things netlist tool of the utility model in NB-IOT signal of communication enhancing circuit, a kind of new hardware knot is proposed
The connection type of structure, without regard to the improvement to computer software or method, by the combination of different chips and circuit components,
The NFC transmission of data of water meter is realized, therefore only relates to the improvement of product structure and connection relationship.
The beneficial effects of the utility model are mainly reflected in:
The technical solution of the utility model complies with the emerging technology of current Internet of Things communication, reduces external environment frequency range to NB
The influence of equipment, simultaneously because the increase of selectivity, while the sensitivity of signal is increased, external interference signal is prevented, is ensured
Signal is efficiently entering in equipment in NB sections, and can under conditions of not changing module internal structure by external network come pair
Signal is screened, and is a kind of simple and very high technological means of cost performance；The products application of the utility model is in extensive range, can
To be applied to the application scenarios of all kinds of water, gas and electricities, heat and all types of industries instrument field.
In this description, the utility model is described with reference to its specific embodiment.But it is clear that still can be with
The spirit and scope that various modification can be adapted and converts without departing from the utility model.Therefore, the description and the appended drawings should be considered as
It is illustrative and not restrictive.
Claims (8)
1. NB-IOT signal of communication enhances circuit in a kind of Internet of Things netlist tool, which is characterized in that including NB-IOT communication module group, filter
The output end of wave network and antenna, the NB-IOT communication module group is connected by the filter network with the antenna；
The filter network includes PE4259 switch, first order π type filter network and second level frequency-selective network, the second level choosing
Frequency network is bandpass filter, and the RFC pin of the PE4259 switch is connected to the antenna, the first order pin network
First end is connected with the RF2 pin that PE4259 is switched, the second end of the first order pin network and the second level frequency-selecting net
The first end of network is connected, and the second end of the second level frequency-selective network is connected with the end RF of the NB-ITO communication module group.
2. NB-IOT signal of communication enhances circuit in Internet of Things netlist according to claim 1 tool, which is characterized in that described the
Level-one π type filter network includes capacitor C20, capacitor C21 and inductance L05, the first end of the capacitor C21 respectively with the inductance
The first end of L05 is connected with the RF2 pin that the PE4259 is switched, and the second end of the capacitor C21 is respectively with capacitor C20's
First end is connected with ground terminal, the second end of the capacitor C20 respectively with the second end of the inductance L05 and the second level
The first end of frequency-selective network is connected.
3. NB-IOT signal of communication enhances circuit in Internet of Things netlist tool according to claim 2, which is characterized in that described
The end RFC of PE4259 switch is connected by capacitor C22 with the antenna.
4. NB-IOT signal of communication enhances circuit in Internet of Things netlist according to claim 2 tool, which is characterized in that described the
Second level frequency-selective network includes capacitor C19 and inductance L04, and the first end of the capacitor C19 is connected with the second end of the capacitor C20
It connects, the first end of the inductance L04 is connected with the first end of the capacitor C19, the second end of the inductance L04 and the electricity
The second end for holding C19 is connected and is connected to the end RF of the NB-IOT communication module group.
5. NB-IOT signal of communication enhances circuit in Internet of Things netlist tool according to claim 1, which is characterized in that the electricity
Road further includes main control chip and electric power management circuit, and the main control chip is connected with the NB-IOT communication module group, the electricity
Power management circuits are NB-IOT communication module group power supply by the main control chip.
6. NB-IOT signal of communication enhances circuit in Internet of Things netlist tool according to claim 5, which is characterized in that the master
It controls chip and uses PIC16LF1947 chip, the 29th pin and the 30th pin of the PIC16LF1947 chip are connected to clock electricity
Road.
7. NB-IOT signal of communication enhances circuit in Internet of Things netlist tool according to claim 6, which is characterized in that when described
Clock circuit includes capacitor C35, capacitor C36 and crystal oscillator X02, and the 29th pin of the PIC16LF1947 chip is connected to the electricity
Hold the first end of C35, the 30th pin of the PIC16LF1947 chip is connected to the first end of capacitor C36, the capacitor C35
Second end and capacitor C36 second end ground connection, be connected between the first end of the capacitor C35 and the first end of capacitor C36
The crystal oscillator X02.
8. NB-IOT signal of communication enhances circuit in Internet of Things netlist tool according to claim 1, which is characterized in that described
NB-IOT communication module group includes NB-IOT communication chip, capacitor C38, resistance R41, resistance R42, resistance R43, resistance R39, resistance
R40, triode Q03 and LED light LED03, in which:
18th pin of the NB-IOT communication chip is connected to the end VCC by resistance R39, and the 19th of NB-IOT communication chip is drawn
Foot is connected to the end VCC by resistance R40, and the 16th pin of NB-IOT communication chip is grounded by LED light LED03, triode Q03
First end be connected to the 7th pin of NB-IOT communication chip, the second end ground connection of triode Q03, the third end of triode Q03
It is respectively connected to the first end of resistance R43 and the first end of resistance R42, the second end ground connection of resistance R43, NB-IOT communication chip
The 40th pin the 43rd pin of NB-IOT communication chip is connected to by capacitor C38, the 1st pin of NB-IOT communication chip is logical
Cross resistance R41 ground connection.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821531365.7U CN208754330U (en) | 2018-09-18 | 2018-09-18 | NB-IOT signal of communication enhances circuit in a kind of Internet of Things netlist tool |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821531365.7U CN208754330U (en) | 2018-09-18 | 2018-09-18 | NB-IOT signal of communication enhances circuit in a kind of Internet of Things netlist tool |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110649938A (en) * | 2019-09-25 | 2020-01-03 | 辽宁地质工程职业学院 | Full-band narrow-band Internet of things electric tuning pipeline induction antenna |
| CN110907000A (en) * | 2019-11-19 | 2020-03-24 | 上海桑锐电子科技股份有限公司 | Unidirectional low-pass filtering blocking circuit and method |
-
2018
- 2018-09-18 CN CN201821531365.7U patent/CN208754330U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110649938A (en) * | 2019-09-25 | 2020-01-03 | 辽宁地质工程职业学院 | Full-band narrow-band Internet of things electric tuning pipeline induction antenna |
| CN110649938B (en) * | 2019-09-25 | 2024-02-27 | 辽宁地质工程职业学院 | Full-band narrowband internet of things electric tuning pipeline induction antenna |
| CN110907000A (en) * | 2019-11-19 | 2020-03-24 | 上海桑锐电子科技股份有限公司 | Unidirectional low-pass filtering blocking circuit and method |
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