CN207304527U - GNSS and LTE diversity reception common antenna interfaces - Google Patents
GNSS and LTE diversity reception common antenna interfaces Download PDFInfo
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- CN207304527U CN207304527U CN201721140859.8U CN201721140859U CN207304527U CN 207304527 U CN207304527 U CN 207304527U CN 201721140859 U CN201721140859 U CN 201721140859U CN 207304527 U CN207304527 U CN 207304527U
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- gnss
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- common antenna
- diversity
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Abstract
The utility model provides a kind of GNSS and LTE diversity reception common antenna interfaces, it includes antenna, diversity common antenna interface, demultiplexing circuit, GNSS modules and LTE modules；The antenna output is connected input with diversity common antenna interface；Diversity common antenna interface connection output is connected with demultiplexing circuit input；The demultiplexing circuit output is connected with GNSS modules, LTE modules respectively.The utility model instead of original two stand-alone interface schemes, realize the miniaturization of T BOX, and save the related hardware costs such as Fraka connectors, RF coaxial line, and then lift the cost performance of T BOX complete machines.
Description
Technical field
It the utility model is related to car networking technology field, and in particular to a kind of GNSS and LTE diversity reception common antenna connect
Mouthful.
Background technology
At present, the vehicle-mounted T-BOX of in the market mainstream, it is most of that all there is LTE communication functions and GNSS positioning functions.Root
Defined according to 3GPP, LTE system needs the transmitting-receiving of external two antennas progress signals of main collection antenna and diversity antenna, and GNSS is then needed
An external antenna, receives global navigation satellite signal.According to common designing scheme, every antenna needs to be used alone one
Antennal interface, therefore a T-BOX for supporting LTE communication functions and GNSS positioning functions, need altogether 3 antennal interfaces, will
Take more valuable pcb board space.
In view of the frequency spectrum that GNSS is used, not overlapping with LTE signal spectrums, therefore GNSS and LTE points can be realized in theory
Collect signal simultaneous transmission in same medium channel, and will not interfere with each other.That is, after signal enters T-BOX, signal point is passed through
From circuit, GNSS signal is extracted from LTE diversity reception signals, and is delivered separately to correlation module, is reduced with reaching
Antennal interface quantity, and then reduce the purpose of T-BOX package sizes.
The content of the invention
The purpose of this utility model is to provide a kind of hardware based GNSS and LTE diversity reception common antenna interfaces.
To achieve the above object, the utility model uses following technical scheme：A kind of GNSS shares day with LTE diversity receptions
Line interface, it is characterised in that：Including antenna, diversity common antenna interface, demultiplexing circuit, GNSS modules and LTE modules；Institute
State antenna output and be connected input with diversity common antenna interface；The connection output of diversity common antenna interface is defeated with demultiplexing circuit
Enter connection；The demultiplexing circuit output is connected with GNSS modules, LTE modules respectively.
In one embodiment of the utility model, antenna is connected by RF coaxial line with diversity common antenna interface.
In one embodiment of the utility model, demultiplexing circuit is GNSS signal extractor.
In one embodiment of the utility model, the GNSS signal extractor is passive frequency sharing circuit.
In one embodiment of the utility model, the antenna is active antenna, further includes low pressure difference linear voltage regulator；It is described
Low pressure difference linear voltage regulator is connected with active antenna.
Compared with prior art, the utility model instead of original two stand-alone interface schemes, realize that T-BOX's is small-sized
Change, and save the related hardware costs such as Fraka connectors, RF coaxial line, and then lift the cost performance of T-BOX complete machines.
Brief description of the drawings
Fig. 1 is the utility model principle block diagram
Fig. 2 is GNSS signal and LTE diversity reception demultiplexing circuits.
Embodiment
Explanation is further explained to the utility model with specific embodiment below in conjunction with the accompanying drawings.
Referring to Fig. 1, the utility model provides a kind of GNSS and LTE diversity reception common antenna interfaces, it includes antenna, divides
Collect common antenna interface, demultiplexing circuit, GNSS modules and LTE modules；The antenna output and diversity common antenna interface
Connection input；Diversity common antenna interface connection output is connected with demultiplexing circuit input；The demultiplexing circuit output
It is connected respectively with GNSS modules, LTE modules.
Interface GNSS and the mixed signal of LTE diversity, and respectively pass to GNSS signal and LTE diversity signals
GNSS modules and LTE modules.
Antenna receives GNSS signal and LTE diversity mixed signals, and is passed mixed signal by same RF coaxial line
Pass GNSS and LTE the diversity common antenna interface of T-BOX；
GNSS, by demultiplexing circuit, isolates GNSS signal and believes with LTE diversity with LTE diversity common antenna interfaces
Number.
GNSS signal and LTE diversity signals are delivered separately to GNSS modules and LTE modules.
GNSS signal is with LTE diversity reception demultiplexing circuits referring to Fig. 2.
In one embodiment of the utility model, antenna is connected by RF coaxial line with diversity common antenna interface.
After GNSS signal is received with LTE diversity receptions signal by GNSS and LTE diversity receptions common antenna, through RF coaxial
Line is transferred to Fraka radio frequency connectors（U1）, into inside T-BOX；GNSS signal extractor（U2）By GNSS signal from mixing
Extracted in signal, pass to GNSS module；Non- GNSS signal, i.e. LTE diversity receptions signal, then pass to LTE module into
Row processing.
Since GNSS system and LTE system needs work at the same time, GNSS signal extractor（U2）Preferably use passive frequency
Divide device, rather than ON-OFF control circuit；Influence each other at the same time to reduce between GNSS module and LTE module, between two passages
Isolation should be greater than 40dB.
GNSS antenna is active antenna in the present embodiment, it is therefore desirable to low pressure difference linear voltage regulator LDO（U3）By L4 to
Active antenna is powered, and such as uses passive GNSS antenna, then LDO is not required.
Above is the preferred embodiment of the utility model, all changes made according to technical solutions of the utility model are produced
Function without departing from technical solutions of the utility model scope when, belong to the scope of protection of the utility model.
Claims (5)
1. a kind of GNSS and LTE diversity reception common antenna interfaces, it is characterised in that：Including antenna, diversity common antenna interface,
Demultiplexing circuit, GNSS modules and LTE modules；The antenna output is connected input with diversity common antenna interface；Diversity is total to
Connected with antennal interface connection output and demultiplexing circuit input；Demultiplexing circuit output respectively with GNSS modules,
LTE modules connect.
2. GNSS according to claim 1 and LTE diversity reception common antenna interfaces, it is characterised in that：Antenna is by penetrating
Frequency coaxial line is connected with diversity common antenna interface.
3. GNSS according to claim 1 and LTE diversity reception common antenna interfaces, it is characterised in that：Signal separator electricity
Road is GNSS signal extractor.
4. GNSS according to claim 3 and LTE diversity reception common antenna interfaces, it is characterised in that：The GNSS letters
Number extractor is passive frequency sharing circuit.
5. GNSS according to claim 1 and LTE diversity reception common antenna interfaces, it is characterised in that：The antenna is
Active antenna, further includes low pressure difference linear voltage regulator；The low pressure difference linear voltage regulator is connected with active antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721140859.8U CN207304527U (en) | 2017-09-07 | 2017-09-07 | GNSS and LTE diversity reception common antenna interfaces |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721140859.8U CN207304527U (en) | 2017-09-07 | 2017-09-07 | GNSS and LTE diversity reception common antenna interfaces |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207304527U true CN207304527U (en) | 2018-05-01 |
Family
ID=62446191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721140859.8U Active CN207304527U (en) | 2017-09-07 | 2017-09-07 | GNSS and LTE diversity reception common antenna interfaces |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207304527U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109149078A (en) * | 2018-09-28 | 2019-01-04 | 广东盛路通信科技股份有限公司 | Shark fin type antenna with the bis- GNSS functions of LTE+ |
-
2017
- 2017-09-07 CN CN201721140859.8U patent/CN207304527U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109149078A (en) * | 2018-09-28 | 2019-01-04 | 广东盛路通信科技股份有限公司 | Shark fin type antenna with the bis- GNSS functions of LTE+ |
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