CN208093742U - A kind of compact 4G LTE MIMO and GPS three-in-one antennas - Google Patents
A kind of compact 4G LTE MIMO and GPS three-in-one antennas Download PDFInfo
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- CN208093742U CN208093742U CN201721504219.0U CN201721504219U CN208093742U CN 208093742 U CN208093742 U CN 208093742U CN 201721504219 U CN201721504219 U CN 201721504219U CN 208093742 U CN208093742 U CN 208093742U
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- 239000000919 ceramic Substances 0.000 claims abstract description 7
- 239000004020 conductor Substances 0.000 claims abstract description 4
- 238000009954 braiding Methods 0.000 claims abstract description 3
- 239000000203 mixture Substances 0.000 claims abstract 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 230000003071 parasitic effect Effects 0.000 claims description 5
- 239000011889 copper foil Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 229920007019 PC/ABS Polymers 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 239000011888 foil Substances 0.000 claims description 2
- 238000002955 isolation Methods 0.000 description 11
- 238000004891 communication Methods 0.000 description 3
- 238000010295 mobile communication Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 241001347978 Major minor Species 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 230000035755 proliferation Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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- Position Fixing By Use Of Radio Waves (AREA)
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Abstract
A kind of compact 4G LTE MIMO and GPS three-in-one antennas, including antenna casing, PCB main board, pcb board 1, pcb board 2 and pcb board 3, GPS antenna ceramic dielectric, GPS low-noise amplifiers and three 50 ohm coaxial lines compositions；Antenna casing is buckled on PCB main board front, and the back side of PCB main board is antenna, and pcb board 1 and pcb board 3 are parallel to each other, establish on two opposite angles of PCB main board, and pcb board 2 is parallel with PCB main board, pcb board 2 forms three-dimensional handstand " L " shape structure with pcb board 1；One end of three 50 ohm coaxial lines is radio frequency connector, and the other end is welded on PCB main board, and the inner wire of coaxial line welds together with the corresponding microstrip feed line on PCB main board, and the ground of outer conductor braiding layer and antenna welds together；PCB main board front further includes three 50 ohm of microstrip line, the back side for antenna, with being divided into antenna 1 and 2 two parts of antenna ground, centre inductance connection.
Description
Technical field
The utility model is related to a kind of compact 4G LTE MIMO and GPS three-in-one antennas.
Background technology
Forth generation (4G LTE) mobile communication is flourishing, and rapid proliferation, core technology is multiple-input, multiple-output
(MIMO) and orthogonal frequency division multiple access (OFDM).MIMO is the skill for being carried out at the same time communication using mutiple antennas in transmitting terminal and receiving terminal
Art can improve the message capacity, data transmission bauds and anti-multipath fading ability of communication system in this way.
Mobile communication terminal needs at least two antennas (primary antenna and slave antenna), in order to ensure primary antenna and slave antenna it
Between isolation, it is desirable that antenna size wants larger.But the size of mobile communication terminal is all smaller, even vehicle-mounted day
Line also requires antenna size small as possible since installation space limits on vehicle.In addition, since 4G antennas need compatible 2G and 3G frequencies
Section, so antenna frequency band is wider, antenna size needs to increase.So there have been contradictions, and one side antenna is for property
Can be good, larger size is needed, requires antenna size small as possible again on the other hand actually using.4G LTE MIMO days at present
Linear dimension is larger, or primary antenna and slave antenna are divided into two independent antennas, installs respectively.This can increase whole antenna system
Cause this and antenna installation cost.In addition, being exactly by reducing the method for antenna performance come the problem of reducing antenna size, bring
Mainly isolation between antennas substantially reduces, even less than 10dB.Since isolation reduces between major-minor antenna, communication system is whole
Data throughput is difficult to improve.
Invention content
The purpose of this utility model seeks to propose one kind while taking into account antenna shapes compact dimensions, and antenna performance is most
Excellent compact 4G LTE MIMO and GPS three-in-one antennas namely the multiple-input, multiple-output of forth generation long term evolution and GPS combined antennas.
The utility model adopts the following technical solution：
A kind of compact 4G LTE MIMO and GPS three-in-one antennas, including antenna casing, PCB main board (polytetrafluoroethylene (PTFE)
Printed circuit board), pcb board 1, pcb board 2 and pcb board 3, GPS antenna ceramic dielectric, GPS low-noise amplifiers and three 50 ohm
Coaxial line forms.
The external dimensions of the antenna casing is 75 millimeters x65 millimeters x20 millimeters, and material is that PC/ABS or other is nonmetallic
Material.
Include PCB main board, pcb board 1, pcb board 2 and pcb board 3 in the antenna casing, the antenna casing is buckled in PCB master
On plate front, the back side of PCB main board is antenna, and pcb board 1 and pcb board 3 are parallel to each other, is established in opposite two of PCB main board
On angle, pcb board 2 is parallel with PCB main board, and pcb board 2 forms three-dimensional handstand " L " shape structure with pcb board 1.
One end of described three 50 ohm coaxial lines is radio frequency connector, such as FAKRA, SMA and TNC, other end weldering
It is connected on PCB main board, the inner wire of coaxial line welds together with the corresponding microstrip feed line on PCB main board, and outer conductor is compiled
The ground of tissue layer and antenna welds together.
Include 4G primary antennas, 4G slave antennas and GPS antenna inside the antenna casing；The 4G primary antennas are by pcb board
1, a part for pcb board 2 and PCB main board collectively forms, and the 4G slave antennas are a part of common structures by PCB3 and PCB main board
At.(PCB main board is shared by 4G primary antennas and 4G slave antennas.)
The GPS antenna includes GPS ceramic medium antennas and low-noise amplifier.
The PCB main board front further includes three 50 ohm of microstrip line, and the back side for antenna, is applied by the mainboard back side
Copper foil is constituted, and constitutes the copper foil on antenna ground with being divided into antenna 1 and 2 two parts of antenna ground, centre inductance connection.
The 4G primary antennas feeder line is connect with 4G primary antenna microstrip feed lines, 4G slave antennas feeder line and 4G slave antenna microstrip feed lines
Connection, GPS antenna feeder line are connect with GPS antenna microstrip feed line.
The 4G primary antennas frequency range is 824-960MHz/1710-2690MHz, generally planar inverted L antennas.For
Realization multiband increases gap and parasitic oscillator.Meanwhile in order to improve the matching status of antenna, distributed inductance is used
And distribution capacity, as shown in Figure 3.Since antenna overall dimensions are smaller, so PCB main board size is smaller, antenna is also meaned that
Ground it is smaller, therefore the low frequency bandwidth of antenna is narrow.In order to widen the low frequency bandwidth of primary antenna, antenna Fig. 5 institutes are used
Show that the form of broken line, the length on such antenna ground are increased, low frequency performance is improved.
The 4G slave antennas frequency range is 1710-2690MHz, is unipole antenna.Primary antenna is located at slave antenna
On the diagonal line of PCB main board, its isolation between primary antenna is improved.In addition, in order to further increase primary antenna and pair
Isolation between antenna, the smaller capacitance of series electrical capacitance on the feeding microstrip line of slave antenna, such as 2pF capacitances.Due to pair
Antenna only has high frequency, i.e. 1710-2690MHz, connect this capacitance on its performance influence very little or it is undamped pass through, also may be used
To see high-pass filter as, but can decay to low frequency signal (824-960MHz), to improve primary antenna with
Isolation of the slave antenna in low frequency.Simulation calculation shows that low frequency isolation degree is increased to 15dB by 10dB, improves about 5dB.Separately
Outside, in order to widen the bandwidth of slave antenna, antenna be divided into two parts, i.e., antenna 1 and antenna 2, centre inductance connection.
The value of this inductance is bigger, and such as 10nH, due to the low-pass characteristic of inductance, so high-frequency signal can not pass through, only low frequency is believed
Number it can pass through.2 performances can be more preferable with not having antenna for 4G slave antennas, but if without antenna 2,4G primary antennas
Low frequency performance can be deteriorated.Can be met simultaneously by the bigger inductance of inductance value now improves slave antenna bandwidth and does not influence
Primary antenna low frequency performance.
The GPS antenna is active antenna, i.e. antenna includes GPS ceramic medium antennas and low-noise amplifier.Due to GPS
Signal is very faint, so needing amplifier amplifies signals, while also compensating for the decaying caused by feeder line.
Technical solution through the invention brings following effect；
1. antenna overall dimensions are smaller；
2. primary antenna and slave antenna good electrical property, high with wide, between the two isolation.
Description of the drawings：
Attached drawing 1 is the appearance diagram of the utility model；
Attached drawing 2 is the inner antenna structural schematic diagram removed after shell；
Attached drawing 3 is the front view of pcb board 1；
Attached drawing 4 is the inner antenna structure top view removed after shell；
Attached drawing 5 is the front view at the PCB main board back side；
Attached drawing 6 is 4G primary antenna voltage standing wave ratioes；
Attached drawing 7 is 4G slave antenna voltage standing wave ratioes；
Attached drawing 8 is isolation between 4G primary antennas and slave antenna；
In figure, 1 is antenna casing, and 2 be coaxial line, and 21 be 4G primary antenna feeder lines, and 22 be GPS antenna feeder line, and 23 be 4G pairs
Feeder, 3 be radio frequency connector, and 4 be PCB main board, and 41 be 4G primary antenna microstrip feed lines, and 42 be GPS antenna microstrip feed line, 43
4G slave antenna microstrip feed lines, 44 be GPS antenna, 45 be inductance, and 46 be antenna, 461 be antenna Isosorbide-5-Nitrae 62 be antenna 2,
5 be pcb board 1,51 be distributed inductance, and 52 be distribution capacity, and 53 be feed section, and 54 be parasitic oscillator, and 6, which be pcb board 2,61, is
4G primary antennas, 7 be pcb board 3；
Specific implementation mode
The utility model is described further with reference to the accompanying drawings and detailed description：
1 is antenna casing, and the external dimensions of antenna casing 1 is 75 millimeters x65 millimeter x20 millimeters, material for PC/ABS or
Other non-metallic materials.
4 be PCB main board, and 5 be pcb board 1,6 be pcb board 2,7 be pcb board 3, and antenna casing 1 is buckled on PCB main board front,
The reverse side of PCB main board is antenna, and pcb board 1 and pcb board 3 are parallel to each other, establish on two opposite angles of PCB main board, PCB
Plate 2 is parallel with PCB main board, and pcb board 2 forms three-dimensional handstand " L " shape structure with pcb board 1.
2 be coaxial line, and 3 be radio frequency connector, and one end of 3 50 ohm coaxial lines is radio frequency connector, such as FAKRA, SMA
And TNC etc., the other end is welded on PCB main board, and the inner wire of coaxial line is welded with the corresponding microstrip feed line on PCB main board
Together, and the ground of outer conductor braiding layer and antenna welds together.
Include 4G primary antennas, 4G slave antennas and GPS antenna inside antenna casing；
4G primary antennas are collectively formed by a part for pcb board 1, pcb board 2 and PCB main board, and the part on pcb board 1 is flat
Face inverted l antenna, including parasitic oscillator 54 further include improving antenna match state distributed inductance 51 and distribution capacity 52；In pcb board
The copper part band that covers on 2 has the gap, which is the broken line of 90 degree of reverse snapback twice.
4G slave antennas are collectively formed by a part for PCB3 and PCB main board；
For GPS antenna 44 on PCB main board, inside includes GPS ceramic medium antennas and low-noise amplifier；
Pcb board 1, pcb board 2 and pcb board 3 are all the single side pcb boards that thickness is 1 millimeter.
PCB main board is the dual platen that thickness is 1 millimeter, and front further includes three 50 ohm of microstrip line, and the back side is day
Line, is made of mainboard back side coating foil, constitutes the copper foil on antenna ground with being divided into antenna 1 and 2 two parts of antenna ground, intermediate
It is connected with inductance 45.
4G primary antennas feeder line on PCB main board is connect with 4G primary antenna microstrip feed lines, 4G slave antennas feeder line and 4G slave antennas
Microstrip feed line connects, and GPS antenna feeder line is connect with GPS antenna microstrip feed line.
In order to widen the low frequency bandwidth of primary antenna, the form of broken line shown in Fig. 5, the length on antenna ground is used to antenna to be increased
Add, low frequency performance is improved.
In order to widen the bandwidth of slave antenna, antenna be divided into two parts, i.e., antenna 1 and antenna 2, centre inductance
Connection.
The 4G primary antennas frequency range is 824-960MHz/1710-2690MHz, generally planar inverted L antennas.For
Realization multiband increases gap and parasitic oscillator.Meanwhile in order to improve the matching status of antenna, distributed inductance is used
And distribution capacity, as shown in Figure 3.Since antenna overall dimensions are smaller, so PCB main board size is smaller, antenna is also meaned that
Ground it is smaller, therefore the low frequency bandwidth of antenna is narrow.In order to widen the low frequency bandwidth of primary antenna, antenna Fig. 5 institutes are used
Show that the form of broken line, the length on such antenna ground are increased, low frequency performance is improved.
From attached drawing 6 and attached drawing 7 as can be seen that in its working band, the voltage standing wave ratio base of 4G primary antennas and slave antenna
It is less than 2.5 in sheet.
The isolation between primary antenna and slave antenna is can be seen that from attached drawing 8.In low frequency 824-960MHz frequency bands, every
It is generally higher than 15dB from degree；In high frequency 1710-2690MHz frequency bands, isolation is more than 12dB.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (5)
1. a kind of compact 4G LTE MIMO and GPS three-in-one antennas, it is characterized in that including antenna casing, PCB main board, pcb board
1, pcb board 2 and pcb board 3, GPS antenna ceramic dielectric, GPS low-noise amplifiers and three 50 ohm coaxial lines compositions；
The antenna casing is buckled on PCB main board front, and the back side of PCB main board is antenna, and pcb board 1 is mutually equal with pcb board 3
Row, is established on two opposite angles of PCB main board, and pcb board 2 is parallel with PCB main board, and pcb board 2 forms three-dimensional fall with pcb board 1
Vertical " L " shape structure；
One end of described three 50 ohm coaxial lines is radio frequency connector, and the other end is welded on PCB main board, is led in coaxial line
Body welds together with the corresponding microstrip feed line on PCB main board, and the ground of outer conductor braiding layer and antenna welds together；
Include 4G primary antennas, 4G slave antennas and GPS antenna inside the antenna casing；
The 4G primary antennas are collectively formed by a part for pcb board 1, pcb board 2 and PCB main board；
The 4G slave antennas are collectively formed by a part for PCB3 and PCB main board；
The GPS antenna is made of GPS ceramic medium antennas and low-noise amplifier；
The PCB main board front further includes three 50 ohm of microstrip line, the back side for antenna, by mainboard back side coating foil
It constitutes, constitutes the copper foil on antenna ground with being divided into antenna 1 and 2 two parts of antenna ground, centre inductance connection；
The 4G primary antennas feeder line is connect with 4G primary antenna microstrip feed lines, and 4G slave antennas feeder line connects with 4G slave antenna microstrip feed lines
It connects, GPS antenna feeder line is connect with GPS antenna microstrip feed line；
The 4G primary antennas frequency range is 824-960MHz/1710-2690MHz, generally planar inverted L antennas；
The 4G slave antennas frequency range is 1710-2690MHz, is unipole antenna；
The 4G primary antennas and 4G slave antennas are located on the diagonal line of PCB main board, improve its between primary antenna every
From degree.
2. a kind of compact 4G LTE MIMO according to claim 1 and GPS three-in-one antennas, it is characterized in that the 4G
Primary antenna further includes gap and parasitic oscillator.
3. a kind of compact 4G LTE MIMO according to claim 1 or 2 and GPS three-in-one antennas, it is characterized in that described
4G primary antennas further include distributed inductance and distribution capacity.
4. a kind of compact 4G LTE MIMO according to claim 1 and GPS three-in-one antennas, it is characterized in that the pair
The smaller capacitance of series electrical capacitance on the feeding microstrip line of antenna.
5. a kind of compact 4G LTE MIMO according to claim 1 and GPS three-in-one antennas, it is characterized in that the day
The external dimensions of line shell is 75 millimeters x65 millimeters x20 millimeters, material PC/ABS.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721504219.0U CN208093742U (en) | 2017-11-03 | 2017-11-03 | A kind of compact 4G LTE MIMO and GPS three-in-one antennas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721504219.0U CN208093742U (en) | 2017-11-03 | 2017-11-03 | A kind of compact 4G LTE MIMO and GPS three-in-one antennas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208093742U true CN208093742U (en) | 2018-11-13 |
Family
ID=64067821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721504219.0U Withdrawn - After Issue CN208093742U (en) | 2017-11-03 | 2017-11-03 | A kind of compact 4G LTE MIMO and GPS three-in-one antennas |
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| Country | Link |
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| CN (1) | CN208093742U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107994329A (en) * | 2017-11-03 | 2018-05-04 | 常州柯特瓦电子有限公司 | A kind of compact 4G LTE MIMO and GPS three-in-one antennas |
-
2017
- 2017-11-03 CN CN201721504219.0U patent/CN208093742U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107994329A (en) * | 2017-11-03 | 2018-05-04 | 常州柯特瓦电子有限公司 | A kind of compact 4G LTE MIMO and GPS three-in-one antennas |
| CN107994329B (en) * | 2017-11-03 | 2024-02-06 | 常州柯特瓦电子股份有限公司 | Compact 4G LTE MIMO and GPS three-in-one antenna |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: No.16, Changjiang North Road, Xinbei District, Changzhou City, Jiangsu Province 213000 Patentee after: Changzhou ketewa Electronics Co.,Ltd. Address before: 213000 No.91, Hanjiang West Road, Xinbei District, Changzhou City, Jiangsu Province Patentee before: CHANGZHOU CTW ELECTRONICS Co.,Ltd. |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20181113 Effective date of abandoning: 20240206 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20181113 Effective date of abandoning: 20240206 |