CN208239605U - A kind of millimeter wave frequency band orthogonal Doppler radar transmit-receive module - Google Patents
A kind of millimeter wave frequency band orthogonal Doppler radar transmit-receive module Download PDFInfo
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- CN208239605U CN208239605U CN201820915775.5U CN201820915775U CN208239605U CN 208239605 U CN208239605 U CN 208239605U CN 201820915775 U CN201820915775 U CN 201820915775U CN 208239605 U CN208239605 U CN 208239605U
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Abstract
The utility model discloses a kind of millimeter wave frequency band orthogonal Doppler radar transmit-receive modules.The module includes radio frequency substrate, shielding case and connector；Radio frequency substrate front side is disposed with transmitting and receiving antenna, and radio frequency substrate back side is disposed with millimetre-wave generator, filter, multiple power splitters, the road I frequency mixer, the road Q frequency mixer, and shielding case covers on the reverse side of entire radio frequency substrate；Millimetre-wave generator is connected through filter with power splitter I, and the output end of power splitter I is connected with the input terminal of transmitting antenna and power splitter II, and the output end of power splitter II is connected with the road I frequency mixer with the road Q frequency mixer；Receiving antenna is connected to the input terminal of power splitter III, and the output end of power splitter III is connected with the road I frequency mixer and the road Q frequency mixer respectively；Transmitting antenna and receiving antenna are all made of the microstrip antenna array form of 4 array elements.The utility model size is small, light-weight, and at low cost and performance is stablized, and is widely used in the fields such as traffic and Industry Control.
Description
Technical field
The utility model relates to a kind of radar transmit-receive modules, more particularly to a kind of millimeter wave frequency band orthogonal Doppler thunder
Up to transceiver module.
Background technique
In automobile intelligent driving assistance system, blind area detection, lane change auxiliary and reversing early warning are indispensable.Current skill
Art scheme is mostly based on the sensor of camera, laser and millimeter wave, and compared with first two, millimetre-wave radar sensor has very
Big advantage, millimetre-wave radar penetrating fog, cigarette, the ability of dust are strong, to the strong antijamming capability of rain, snow, mist.
What the radar transmit-receive module of the utility model used is millimeter-wave technology, is not only widely used in field of traffic,
And it can all be applied in Industry Control and other scenes for needing detection object to move.
Utility model content
In view of the deficiencies of the prior art, the utility model provides a kind of millimeter wave frequency band orthogonal Doppler radar transmit-receive mould
Block has the characteristics that environmental suitability is strong using millimeter-wave technology.
The technical scheme adopted by the utility model to solve the technical problem is as follows:
The utility model includes radio frequency substrate, shielding case；Radio frequency substrate front side is disposed with antenna, and antenna includes transmitting antenna
20 and receiving antenna, it is mixed that radio frequency substrate back side is disposed with millimetre-wave generator, filter, multiple power splitters, the road I frequency mixer, the road Q
Frequency device, shielding case cover on the reverse side of entire radio frequency substrate；Input of the output end of millimetre-wave generator through filter Yu power splitter I
End is connected, and an output end of power splitter I is connected with transmitting antenna, and the another output of power splitter I is defeated with power splitter II
Enter end to be connected, an output end of power splitter II is connected with an input terminal of the road I frequency mixer, another output of power splitter II
End is connected with an input terminal of the road Q frequency mixer；Receiving antenna is connected to the input terminal of power splitter III, and two of power splitter III are defeated
Outlet is connected respectively to another input terminal of the road I frequency mixer and the road Q frequency mixer.
It further include having connector, connector is arranged in the side of radio frequency substrate, and the connector is inserted using the in line of 5pin
Needle, each in line contact pin are followed successively by the contact pin of the road NC, Gnd, Q intermediate frequency, the road Power, I intermediate frequency.
The NC contact pin is vacant, the road Gnd, Q intermediate frequency, the road Power, I intermediate frequency contact pin be separately connected ground, the road Q frequency mixer,
External power supply, the road I frequency mixer.
The millimetre-wave generator includes active device, resonant tank and microstrip coupled circuit, and active device is one brilliant
Body pipe, the drain electrode of transistor is through microstrip coupled circuit connection to itself grid, and the grid of transistor is successively through resonant tank, filter
The input terminal of power splitter I is connected to after wave device, the source electrode of transistor is grounded through capacitance resistance.
The transmitting antenna is identical as receiving antenna dimensional structure, and the two is arranged symmetrically in the two of radio frequency substrate front side
Side.
The transmitting antenna and receiving antenna uses the micro-strip antenna array form of four array elements.
The transmitting antenna and receiving antenna is composed in parallel by the rectangular microband paste unit of four vertical polarizations.
The road the I frequency mixer and the road Q frequency mixer is two-way annular balance frequency mixer, and is using two diodes
Single balance mixer.
The filter uses micro-strip filter circuit.
The connection type of the shielding case and radio frequency substrate is welding or silicone gluing knot.
The utility model has the beneficial effect that
The transmitting of the utility model and receiving antenna are composed in parallel by four rectangular microstrip antenna units, are realized limited
Size under obtain high-gain；I, Q two-way annular balance frequency mixer receive-transmit isolation of use are good, and conversion loss is low.
Entire millimeter wave transceiving module is integrated on a multi-layer RF substrate by the utility model, and antenna uses low section
Microstrip antenna realize that therefore can accomplish that size is small, light-weight, at low cost and performance is stablized, not only in field of traffic application
Extensively, and in Industry Control and other scenes for needing detection object to move it can all apply.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of millimeter wave orthogonal Doppler radar transmit-receive module.
Fig. 2 is the principle explanatory diagram of millimeter wave orthogonal Doppler radar transmit-receive module.
Fig. 3 is radio frequency substrate front side line map.
Fig. 4 is the distribution map of transmitting and receiving antenna horizontal direction radiant power with angle change.
Fig. 5 is the distribution map of transmitting and receiving antenna vertical direction radiant power with angle change.
In figure: radio frequency substrate 1, antenna 2, shielding case 3, connector 4, filter 6, power splitter I 8, power splitter II 9, the road I are mixed
Frequency device 10, the road Q frequency mixer 11, power splitter III 12, rectangular microband paste unit 19, transmitting antenna 20, receiving antenna 21, millimeter wave
Oscillator 22, millimetre-wave generator 22.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing.
As shown in Figures 1 to 3, the utility model includes radio frequency substrate 1, shielding case 3；1 front of radio frequency substrate is disposed with antenna
2, antenna 2 includes transmitting antenna 20 and receiving antenna 21, and radio frequency substrate back side is disposed with millimetre-wave generator 22, filter 6, more
A power splitter, the road I frequency mixer 10, the road Q frequency mixer 11, shielding case 3 cover on the reverse side of entire radio frequency substrate 1；Millimetre-wave generator
22 output end is connected through filter 6 with the input terminal of power splitter I 8,20 phase of an output end and transmitting antenna of power splitter I 8
Even, the another output of power splitter I 8 is connected with the input terminal of power splitter II 9, and an output end of power splitter II 9 and the road I are mixed
One input terminal of frequency device 10 is connected, and the another output of power splitter II 9 is connected with an input terminal of the road Q frequency mixer 11；
Receiving antenna 21 is connected to the input terminal of power splitter III 12, and two output ends of power splitter III 12 are connected respectively to the road I frequency mixer
The output end of another input terminal of the road 10 and Q frequency mixer 11, the road I frequency mixer 10 and the road Q frequency mixer 11 respectively exports the road I intermediate frequency
Signal and the road Q intermediate-freuqncy signal；It further include having connector 4, connector 4 is arranged in the side of radio frequency substrate 1, and the connector 4 is adopted
With the in line contact pin of 5pin, each in line contact pin is followed successively by the contact pin of the road NC, Gnd, Q intermediate frequency, the road Power, I intermediate frequency, and NC contact pin is empty
Set, the road Gnd, Q intermediate frequency, the road Power, I intermediate frequency contact pin be separately connected ground, the road Q frequency mixer 11, external power supply, the road I frequency mixer
10。
Millimetre-wave generator 22 includes active device, resonant tank and microstrip coupled circuit, and active device is a transistor,
The drain electrode of transistor is through microstrip coupled circuit connection to itself grid, and the drain electrode of transistor is by microstrip coupled circuit by crystal
The output power part of pipe is coupled to grid from drain electrode, forms positive-feedback circuit, the grid of transistor is successively through resonant tank, filter
The input terminal of power splitter I 8 is connected to after wave device 6, the source electrode of transistor is grounded through capacitance resistance.
The connection type of shielding case 3 and radio frequency substrate 1 is welding or silicone gluing knot.
As shown in Fig. 2, the signal that millimetre-wave generator 22 exports is input to power splitter I 8 through filter 6, it is input to function point
The signal of device II 9 is divided into two, the antenna 20 emitted all the way of power splitter I 8 to space radiated electromagnetic wave, power splitter I 8 it is another
It is input in power splitter II 9 all the way and signal is divided into two again, power splitter II 9 enters the road I frequency mixer as local oscillator all the way
10, the signal of the another way of power splitter II 9 enters the road Q frequency mixer 11 after 90 degree of phase shifts are handled；Receiving antenna 21 is in space
Receive electromagnetic signal, be divided into two after switching to microwave signal through power splitter III 12, power splitter III 12 all the way as signal end into
Enter the road I frequency mixer 10, the another way of power splitter III 12 enters the road Q frequency mixer 11 as signal end, exports from I, Q two-way frequency mixer
Orthogonal I, Q intermediate-freuqncy signal.
As shown in figure 3, transmitting antenna 20 is identical as 21 dimensional structure of receiving antenna, the two is arranged symmetrically in radio frequency substrate 1
Positive two sides, transmitting antenna 20 and receiving antenna 21 use the micro-strip antenna array form of four array elements, by four vertical polarizations
Rectangular microband paste unit 19 compose in parallel.
The present embodiment size is smaller, about 25mm*25mm, light-weight, and at low cost and performance is stablized, and power splitter uses Weir
The gloomy power splitter of gold, transistor are managed using PHEMT, and filter 6 uses micro-strip filter circuit.
In the utility model, I, Q two-way frequency mixer are mainly made of mixer diode, the local oscillator that power splitter II 9 generates
Signal inversion is input to two mixer diodes, the reception signal homophase input that receiving antenna 21 generates to two two poles of mixing
Pipe.
By test, the radiant power of transmitting and receiving antenna horizontal direction is with the variation of angle as shown in figure 4, can in figure
See, about 80 degree of the horizontal half-power beam width of antenna, angular range meets application requirement.
By test, the radiant power of transmitting and receiving antenna vertical direction is with the variation of angle as shown in figure 5, can in figure
See, about 34 degree of antennas orthogonal half-power beam width, meets application requirement.
Claims (10)
1. a kind of millimeter wave frequency band orthogonal Doppler radar transmit-receive module, which is characterized in that include radio frequency substrate (1), shielding case
(3)；Radio frequency substrate (1) front is disposed with antenna (2), and antenna (2) includes transmitting antenna (20) and receiving antenna (21), radio frequency base
Plate reverse side is disposed with millimetre-wave generator (22), filter (6), multiple power splitters, the road I frequency mixer (10), the road Q frequency mixer
(11), shielding case (3) covers on the reverse side of entire radio frequency substrate (1)；The output end of millimetre-wave generator (22) through filter (6) with
The input terminal of power splitter I (8) is connected, and an output end of power splitter I (8) is connected with transmitting antenna (20), power splitter I (8)
Another output is connected with the input terminal of power splitter II (9), the output end and the road I frequency mixer (10) of power splitter II (9)
An input terminal be connected, the another output of power splitter II (9) is connected with an input terminal of the road Q frequency mixer (11)；It connects
The input terminal that antenna (21) are connected to power splitter III (12) is received, it is mixed that two output ends of power splitter III (12) are connected respectively to the road I
Another input terminal of frequency device (10) and the road Q frequency mixer (11).
2. millimeter wave frequency band orthogonal Doppler radar transmit-receive module according to claim 1, which is characterized in that the milli
Metric wave oscillator (22) includes active device, resonant tank and microstrip coupled circuit, and active device is a transistor, transistor
Drain electrode successively connects after (6) through resonant tank, filter through microstrip coupled circuit connection to itself grid, the grid of transistor
Source electrode to the input terminal of power splitter I (8), transistor is grounded through capacitance resistance.
3. millimeter wave frequency band orthogonal Doppler radar transmit-receive module according to claim 1, which is characterized in that further include having
Connector (4), connector (4) are arranged in the side of radio frequency substrate (1), and the connector (4) uses the in line contact pin of 5pin, respectively
In line contact pin is followed successively by the road NC, Gnd, Q intermediate frequency, the road Power, I intermediate frequency contact pin.
4. a kind of millimeter wave frequency band orthogonal Doppler radar transmit-receive module according to claim 3, which is characterized in that described
NC contact pin it is vacant, the road Gnd, Q intermediate frequency, the road Power, I intermediate frequency contact pin be separately connected ground, the road Q frequency mixer (11), external electrical
Source, the road I frequency mixer (10).
5. millimeter wave frequency band orthogonal Doppler radar transmit-receive module according to claim 1, which is characterized in that the hair
It is identical as receiving antenna (21) dimensional structure to penetrate antenna (20), the two is arranged symmetrically in radio frequency substrate (1) positive two sides.
6. millimeter wave frequency band orthogonal Doppler radar transmit-receive module according to claim 1, which is characterized in that the hair
It penetrates antenna (20) and receiving antenna (21) uses the micro-strip antenna array form of four array elements.
7. millimeter wave frequency band orthogonal Doppler radar transmit-receive module according to claim 1, which is characterized in that the hair
Antenna (20) and receiving antenna (21) is penetrated to be composed in parallel by the rectangular microband paste unit (19) of four vertical polarizations.
8. a kind of millimeter wave frequency band orthogonal Doppler radar transmit-receive module according to claim 1, which is characterized in that described
The road I frequency mixer (10) and the road Q frequency mixer (11) be single balance mixer using two diodes.
9. a kind of millimeter wave frequency band orthogonal Doppler radar transmit-receive module according to claim 1, which is characterized in that described
Filter (6) use micro-strip filter circuit.
10. a kind of millimeter wave frequency band orthogonal Doppler radar transmit-receive module according to claim 1, which is characterized in that institute
The connection type of the shielding case (3) and radio frequency substrate (1) stated is welding or silicone gluing knot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820915775.5U CN208239605U (en) | 2018-06-13 | 2018-06-13 | A kind of millimeter wave frequency band orthogonal Doppler radar transmit-receive module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820915775.5U CN208239605U (en) | 2018-06-13 | 2018-06-13 | A kind of millimeter wave frequency band orthogonal Doppler radar transmit-receive module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208239605U true CN208239605U (en) | 2018-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820915775.5U Active CN208239605U (en) | 2018-06-13 | 2018-06-13 | A kind of millimeter wave frequency band orthogonal Doppler radar transmit-receive module |
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| Country | Link |
|---|---|
| CN (1) | CN208239605U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110927675A (en) * | 2019-11-15 | 2020-03-27 | 张明 | Energy-cascade millimeter wave radar chip |
| CN110927674A (en) * | 2019-11-15 | 2020-03-27 | 张明 | Millimeter wave radar chip with two-dimensional scanning function |
| CN110927705A (en) * | 2019-11-26 | 2020-03-27 | 北京工业大学 | Design of 77GHz millimeter wave circuit |
-
2018
- 2018-06-13 CN CN201820915775.5U patent/CN208239605U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110927675A (en) * | 2019-11-15 | 2020-03-27 | 张明 | Energy-cascade millimeter wave radar chip |
| CN110927674A (en) * | 2019-11-15 | 2020-03-27 | 张明 | Millimeter wave radar chip with two-dimensional scanning function |
| CN110927705A (en) * | 2019-11-26 | 2020-03-27 | 北京工业大学 | Design of 77GHz millimeter wave circuit |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: Room 101, Unit 1, Building 38, No. 1218 Wenyi West Road, Cangqian Street, Yuhang District, Hangzhou City, Zhejiang Province, 311121 Patentee after: Hangzhou Ruida Zhigan Technology Co.,Ltd. Country or region after: China Address before: Room 101, Unit 1, Building 38, No. 1218 Wenyi West Road, Cangqian Street, Yuhang District, Hangzhou City, Zhejiang Province, 311121 Patentee before: HANGZHOU RUIDA AUTOMOBILE TECHNOLOGY Co.,Ltd. Country or region before: China |