CN201146233Y - Waveguide assembly for forming millimeter wave radar circular polarization beam - Google Patents
Waveguide assembly for forming millimeter wave radar circular polarization beam Download PDFInfo
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- CN201146233Y CN201146233Y CNU2007201315610U CN200720131561U CN201146233Y CN 201146233 Y CN201146233 Y CN 201146233Y CN U2007201315610 U CNU2007201315610 U CN U2007201315610U CN 200720131561 U CN200720131561 U CN 200720131561U CN 201146233 Y CN201146233 Y CN 201146233Y
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Abstract
The utility model relates to a waveguide assembly formed by millimeter-wave radar circularly polarized beam, which comprises a waveguide cavity, a waveguide base, a matching bar and a mixing diode, etc. Two square crossing and banding wave guides form four waveguide ports; at the same time, a circular waveguide output port is formed at the waveguide junction along the vertical direction of the waveguide plane to constitute a five-port waveguide network. After being input from an input port, the input signal is respectively fed to the upper short circuit port and the lower short circuit port and two signals with the same aptitude and 90 degrees phase difference are obtained after the phase shift; the signals are delivered to the output port by the matching bar and output to a horn antenna; at the same time a small part of signals are coupled to an isolate port as local oscillation signals of a frequency mixing network. Receipt signals directly enter the isolate port after entering the network by the output port; a feed-in waveguide mixer is output by a frequency mixing output port after carrying out frequency mixing with the local oscillation signals. The waveguide assembly has the advantages of simple structure and convenient operation, which is suitable for pulsed radar system and continuous wave radar system.
Description
Technical field
The utility model belongs to microwave technical field, is specifically related to a kind of millimetre-wave radar circular polarization wave beam and forms waveguide assembly.
Background technology
Energy loss was very big when the microwave of radar emission transmitted in air, and main cause is that the air dielectric loss is big because of the carrier frequency height.Especially in millimere-wave band, because carrier frequency is very high, microwave wavelength is little, same distance radar microwave energy loss is bigger, rain simultaneously at severe weather conditions, snow, mist etc.) during work, because raindrop, mist pearl etc. are to the reflection of microwave signal, system's antijamming capability also weakens greatly.Above factor is very big to power, sensitivity and the antijamming capability influence of proximity detection millimetre-wave radar, even wrong measurement data can occur.Theory and practice proves, when millimetre-wave radar descends to work at bad weathers such as rain, mist, snow, the microwave polarization mode is if adopt the circular polarization mode, can reduce of the influence of jamming target echoes such as raindrop, mist pearl with respect to the linear polarization mode effectively, thereby improve the radar system antijamming capability the radar system surveying work.
The utility model content
The purpose of this utility model provides a kind of millimetre-wave radar circular polarization wave beam simple in structure, that form the circular polarization wave beam in the space horn antenna direct feed by network and forms waveguide assembly, and provides corresponding method for designing.
Technical solution of the present utility model is as follows:
A kind of millimetre-wave radar circular polarization wave beam forms waveguide assembly and comprises wave-guide cavity wave 1, waveguide base plate 2, matching pillar 10 and mixer diode 13,
Wave-guide cavity wave 1 has the end of horizontal rectangular cavity 3 and vertical 4, two rectangular cavity of rectangular cavity in same plane, and laterally the left end of rectangular cavity 3 is opened on the left surface of wave-guide cavity wave 1, forms input port 8, the laterally right-hand member of rectangular cavity 3 sealing; Vertically the two ends up and down of rectangular cavity are all sealed, and form respectively to go up short circuit port 6 and following short circuit port 7; Laterally rectangular cavity 3 and vertically rectangular cavity 4 quadratures also have the ladder cylindrical hole with two vertical directions in rectangular cavity bottom surface in the center at quadrature place, constitute output port 5; Laterally rectangular cavity 3 and vertically rectangular cavity 4 left surface infalls formation isolated port 9.
Waveguide base plate 2 and wave-guide cavity wave 1 airtight cooperation are one, form five branch road waveguides, and wherein four is rectangular waveguide, and one is cylindrical waveguide;
Matching pillar 10 is the two poles of the earth ladder column structures, and matching pillar 10 upper ends are fixed on the waveguide base plate 2, and the lower end of matching pillar 10 is positioned at the garden waveguide of output port 5, and the central shaft of matching pillar 10 is vertical with the plane at waveguide base plate 2 places.
The length of the rectangular waveguide of the length of the rectangular waveguide of last short circuit port 6 and following short circuit port 7 is unequal.
On the horizontal center line of the bottom surface of the horizontal rectangular cavity 3 of wave-guide cavity wave 1, be positioned at the right-hand a certain position of isolated port 9, and have base installing hole 11 with the vertical direction in rectangular cavity 3 bottom surfaces, this position is the installation site of the mixer tube 13 that calculated according to the wave-guide cavity wave method for designing, the diameter of base installing hole 11 is by the size decision of mixer tube base 12, mixer diode 13 1 ends are installed in the mixer tube base 12, and the other end is inlaid in the mixer tube fixing hole 14 of waveguide base plate 2.
Signal after the Frequency mixing processing is in 15 outputs of mixing output port.
Good effect of the present utility model is:
Form the feeding network system with respect to traditional circular polarization wave beam, this device provides very simple a, implementation method easily, has sizable effect and meaning in engineering practice.Applicable to pulsed radar system and continuous-wave radar system.
Description of drawings
Fig. 1 is the utility model structural representation,
Fig. 2 is the utility model wave-guide cavity wave structural representation,
Fig. 3 is the vertical view of Fig. 2,
Fig. 4 is the utility model waveguide base arrangement schematic diagram,
Fig. 5 is the vertical view of Fig. 4.
Specific embodiments
The utility model is described in further detail below in conjunction with embodiment.
Embodiment:
Referring to Fig. 1, a kind of millimetre-wave radar circular polarization wave beam forms waveguide assembly and comprises wave-guide cavity wave 1, waveguide base plate 2, matching pillar 10 and mixer diode 13.
Laterally the left end of rectangular cavity 3 is opened on the left surface of wave-guide cavity wave 1 in same plane at the end that has horizontal rectangular cavity 3 and vertical 4, two rectangular cavity of rectangular cavity on the wave-guide cavity wave 1, forms input port 8, the laterally right-hand member of rectangular cavity 3 sealing; Vertically the two ends up and down of rectangular cavity are all sealed, and form respectively to go up short circuit port 6 and following short circuit port 7.Laterally rectangular cavity 3 and vertically rectangular cavity 4 quadratures also have the ladder cylindrical hole with two vertical directions in rectangular cavity bottom surface in the center at quadrature place, constitute output port 5; Laterally rectangular cavity 3 and vertically rectangular cavity 4 left surface infalls formation isolated port 9 are seen Fig. 2 and Fig. 3.
Waveguide base plate 2 and wave-guide cavity wave 1 airtight cooperation are one, surround five branch road waveguides with wave-guide cavity wave 1, and wherein four is rectangular waveguide, and one is cylindrical waveguide, sees Fig. 1, Fig. 4 and Fig. 5.
Matching pillar 10 is the two poles of the earth ladder column structures, and matching pillar 10 upper ends are fixed on the waveguide base plate 2, and the lower end of matching pillar 10 is positioned at the cylindrical waveguide of output port 5, and the central shaft of matching pillar 10 is vertical with the plane at waveguide base plate 2 places.
The length of the rectangular waveguide of the length of the rectangular waveguide of last short circuit port 6 and following short circuit port 7 is unequal.
On the horizontal center line of the bottom surface of the horizontal rectangular cavity 3 of wave-guide cavity wave 1, be positioned at the right-hand a certain position of isolated port 9 and have base installing hole 11 with the vertical direction in rectangular cavity 3 bottom surfaces, this position is the installation site of the mixer tube 13 that calculated according to the wave-guide cavity wave method for designing, the diameter of base installing hole 11 is by the size decision of mixer tube base 12, mixer diode 13 1 ends are installed in the mixer tube base 12, and the other end is inlaid in the mixer tube fixing hole 14 of waveguide base plate 2.
Signal after the Frequency mixing processing is in 15 outputs of mixing output port.
Input signal is by short circuit port 6 and following short circuit port 7 in the input port 8 input back difference feed-ins, because the waveguide length of two short circuit ports there are differences, can realize input signal is carried out phase shift, select suitable length difference identical to obtain the two-way amplitude, the signal of phase phasic difference 90 degree imports output port 5 into by matching pillar 10; And output to horn antenna; The fraction signal that is coupled simultaneously is to the local oscillation signal of isolated port 9 as the mixing network.During reception, signal directly enters isolated port 9 after output port 5 enters network, and feed-in waveguide mixer and local oscillation signal carry out Frequency mixing processing, and the signal after the Frequency mixing processing is by 15 outputs of mixing output port.
The selection of major parameter is as follows during the design of waveguide transceiver network.
(1) waveguide bore
The rectangular waveguide bore will consideration and aspect factor such as impedance matching of wiveguide oscillator and waveguide mixer, frequency range.Because when the design of wiveguide oscillator, the designing impedance matching of wave-guide cavity wave is relevant with housing depth, the height that suitably reduces waveguide cavity can help the impedance matching of wave-guide cavity wave.In addition, the circular waveguide bore also will be considered the coupling with horn antenna.
(2) each port waveguide segment length
For guaranteeing system's circular polarization performance, require network to produce two-way electric field quadrature at 5 ports, the signal of phase phasic difference 90 degree carries out feed to horn antenna.Therefore in network design, utilize the waveguide length difference of 6 ports and 4 ports to carry out phase shift, obtain the mutually orthogonal signal of two-way with-45 ° of directions, can satisfy the requirement of circular polarization feed at+45 °.
(3) center matching structure
The center matching structure adopts the form of two-stage matching pillar, the diameter of matching pillars at different levels, highly directly influences the size that the orthogonality of impedance matching, output port polarization ripple of each port and magnitude-phase characteristics and 3 ports leak the power energy, must take all factors into consideration.
4) according to the wave-guide cavity wave method for designing, calculate the riding position of mixer tube, and in this location point perforate as the intermediate-freuqncy signal leading point, pore size is determined by mixer tube base size.Mixer tube one end is placed in the mixer tube base, and the other end embeds and is fixed in the waveguide transceiver network base plate fixing hole.This structural design is integrated in one frequency mixer and transceiver network, greatly reduces system design complexity and cost.
The circular polarization wave beam that the utility model is applied to any microwave frequency band forms transceiver network, and waveguide transceiver network and frequency mixer are integrated, thereby simple in structure, convenient.In engineering practice, have very big effect and meaning, applicable to pulsed radar system and continuous-wave radar system.
Claims (1)
1, millimetre-wave radar circular polarization wave beam forms waveguide assembly, it is characterized in that: comprise wave-guide cavity wave (1), waveguide base plate (2), matching pillar (10) and mixer diode (13),
Have horizontal rectangular cavity (3) and vertical rectangular cavity (4) on the wave-guide cavity wave (1), the end of two rectangular cavity, is in same plane, laterally the left end of rectangular cavity (3) is opened on the left surface of wave-guide cavity wave (1), forms input port (8), the laterally right-hand member of rectangular cavity (3) sealing; Vertically the two ends up and down of rectangular cavity are all sealed, and form respectively to go up short circuit port (6) and following short circuit port (7); Laterally rectangular cavity (3) and vertically rectangular cavity (4) quadrature also have the ladder cylindrical hole with two vertical directions in rectangular cavity bottom surface in the center at quadrature place, constitute output port (5); Laterally rectangular cavity (3) and vertically rectangular cavity (4) left surface infall formation isolated port (9);
Waveguide base plate (2) and the airtight cooperation of wave-guide cavity wave (1) are one, form five branch road waveguides, and wherein four is rectangular waveguide, and one is cylindrical waveguide;
Matching pillar (10) is the two poles of the earth ladder cylindrical rods, matching pillar (10) upper end is fixed on the waveguide base plate (2), the lower end of matching pillar (10) is positioned at the cylindrical waveguide of output port (5), and the central shaft of matching pillar (10) is vertical with the plane at waveguide base plate (2) place;
The length of the rectangular waveguide of the length of the rectangular waveguide of last short circuit port (6) and following short circuit port (7) is unequal;
On the horizontal center line of the bottom surface of the horizontal rectangular cavity (3) of wave-guide cavity wave (1), be positioned at the right side and the vertical base installing hole (11) that has of isolated port (9) with rectangular cavity (3) bottom surface, mixer diode (13) one ends are installed on the mixer tube base (12), and the other end is inlaid in the mixer tube fixing hole (14) of waveguide base plate (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201315610U CN201146233Y (en) | 2007-12-19 | 2007-12-19 | Waveguide assembly for forming millimeter wave radar circular polarization beam |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201315610U CN201146233Y (en) | 2007-12-19 | 2007-12-19 | Waveguide assembly for forming millimeter wave radar circular polarization beam |
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| Publication Number | Publication Date |
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| CN201146233Y true CN201146233Y (en) | 2008-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2007201315610U Expired - Lifetime CN201146233Y (en) | 2007-12-19 | 2007-12-19 | Waveguide assembly for forming millimeter wave radar circular polarization beam |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104427807A (en) * | 2013-08-27 | 2015-03-18 | 罗伯特·博世有限公司 | Circuit for millimeter wave signals |
| CN104980111A (en) * | 2015-05-29 | 2015-10-14 | 中国科学院空间科学与应用研究中心 | Terahertz frequency mixer with position-adjustable waveguide short circuit surface |
| CN108776328A (en) * | 2018-04-04 | 2018-11-09 | 海华电子企业(中国)有限公司 | A kind of rigid solid state rapidly switches off radar transmitter modulating device and method |
-
2007
- 2007-12-19 CN CNU2007201315610U patent/CN201146233Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104427807A (en) * | 2013-08-27 | 2015-03-18 | 罗伯特·博世有限公司 | Circuit for millimeter wave signals |
| CN104427807B (en) * | 2013-08-27 | 2019-11-19 | 罗伯特·博世有限公司 | Circuit for millimeter-wave signal |
| CN104980111A (en) * | 2015-05-29 | 2015-10-14 | 中国科学院空间科学与应用研究中心 | Terahertz frequency mixer with position-adjustable waveguide short circuit surface |
| CN104980111B (en) * | 2015-05-29 | 2017-11-21 | 中国科学院空间科学与应用研究中心 | A kind of Terahertz frequency mixer with the adjustable waveguide short face in position |
| CN108776328A (en) * | 2018-04-04 | 2018-11-09 | 海华电子企业(中国)有限公司 | A kind of rigid solid state rapidly switches off radar transmitter modulating device and method |
| CN108776328B (en) * | 2018-04-04 | 2021-04-02 | 海华电子企业(中国)有限公司 | Modulation device and method for rigid solid-state rapid turn-off radar transmitter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Wuhu Bo Rui Ruida Electronic Technology Co., Ltd. Assignor: No.38 Inst., China Electronic Sci. & Tech. Group Co. Contract record no.: 2012340000127 Denomination of utility model: Waveguide assembly for forming millimeter wave radar circular polarization beam Granted publication date: 20081105 License type: Common License Record date: 20120416 |
|
| EC01 | Cancellation of recordation of patent licensing contract |
Assignee: Wuhu Bo Rui Ruida Electronic Technology Co., Ltd. Assignor: No.38 Inst., China Electronic Sci. & Tech. Group Co. Contract record no.: 2012340000127 Date of cancellation: 20150319 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20081105 |