CN103022604A - Compact type low-temperature second harmonic mixer base - Google Patents
Compact type low-temperature second harmonic mixer base Download PDFInfo
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- CN103022604A CN103022604A CN2012105749328A CN201210574932A CN103022604A CN 103022604 A CN103022604 A CN 103022604A CN 2012105749328 A CN2012105749328 A CN 2012105749328A CN 201210574932 A CN201210574932 A CN 201210574932A CN 103022604 A CN103022604 A CN 103022604A
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Abstract
A compact type low-temperature second harmonic mixer base comprises a heat conduction support and a base body, the base body comprises a signal input waveguiding structure, a reference signal input waveguiding structure, a frequency mixing chip slot, a high-frequency switching cavity and an output signal port, wherein the L-shaped heat conduction support comprises a horizontal contact surface, a vertical contact surface and a hollowed-out structure on the vertical contact surface, the base body is fixed together with the heat conduction support, the signal input waveguiding structure is internally provided with a to-be-measured signal input port, a to-be-measured signal input waveguide, a reference signal input waveguide transition segment and a to-be-measured signal input half-height waveguide, the reference signal input waveguiding structure is also internally provided with a reference signal input port, a reference signal input waveguide, a reference signal input waveguide transition segment and a reference signal input half-height waveguide which are matched with the same, and the signal input waveguiding structure, the reference signal input waveguiding structure and the high-frequency switching cavity are communicated together by the frequency mixing chip slot. The compact type low-temperature second harmonic mixer base is capable of achieving non-sparse acquisition for a millimeter-wave frequency-band mixer in a low-temperature environment.
Description
Technical field
The invention belongs to a kind of second harmonic frequency mixer pedestal of frequency microwave waveguide component and device, particularly a kind of compact.
Background technology
Terahertz Technology is a key technology in the remote sensing, also has potential application that potential using value is also arranged in fields such as human body safety check, atmospheric environment, resources remote sensings simultaneously.The Schottky diode frequency mixer is the most widely used detector of this frequency range.Therefore be widely used in millimeter and involve the Terahertz receiving system as frequency conversion device or detection device.Currently used mixting circuit form mainly contains three kinds: double-side band frequency mixer, single sideband mixer and the mixing of sideband divergence type.By the frequency relation of reference signal and RF signal to be checked, the mixting circuit form mainly contains: fundamental wave mixing device, second harmonic frequency mixer and harmonic mixer more.The fundamental signal that the fundamental wave mixing device adopts reference signal output directly and radiofrequency signal carry out mixing.The intermediate frequency output signal frequency that produces is the poor of reference signal frequency and measured signal frequency, namely satisfies ω
IF=| ω
RF-ω
LO|, the second harmonic frequency mixer mainly is to utilize the second harmonic of reference signal then to select required signal by output filter with the mixing of RF signal.The frequency of intermediate frequency output signal is the poor of reference signal frequency twice and RF signal frequency to be measured, namely satisfies ω
IF=| ω
RF-2 ω
LO|.The well second harmonic frequency mixer of the mixed frequency characteristic of fundamental wave mixing device in general, but consider actual conditions, compare fundamental wave mixing, the second harmonic frequency mixer is high to the derived reference signal power requirement, frequency is low, so the derived reference signal Financial cost of second harmonic frequency mixer is lower.So that generally adopted in the practical application.Common second harmonic frequency mixer main body comprises a mixing pedestal, mixer chip (mainly realizing the core component of mixing), RF input, reference signal input and medium frequency output end.Although existing second harmonic frequency mixer can be realized basic function, but still there is following shortcoming.At first, existing waveguide type second harmonic mixer architecture is not compact, and it has been the mainstream applications field that at present multipoint array-type mixing is surveyed.Compact structure can not cause sparse sampling and frequency mixer arrangement problems when being applied to array detection.When sparse sampling occurs, need Multiple-Scan to remedy sparse arrangement problems, cause operation of receiver efficient low.Secondly, because existing waveguide type double-side band second harmonic frequency mixer is all for designing under the normal temperature operational environment, because the thermal noise the when thermal noise of Schottky diode is higher than low temperature under the normal temperature, thereby can not take full advantage of the mixing performance that thermal noise good under the low temperature improves the second harmonic frequency mixer during normal temperature.
Summary of the invention
Technology of the present invention is dealt with problems and is: overcome the deficiencies in the prior art, a kind of second harmonic frequency mixer pedestal of compact is provided, and the structure of adjusting reference signal, measured signal input and output signal port solves the problem that the excessive inconvenient array of waveguide type second harmonic frequency mixer pedestal volume is installed.In heat transfer supporting construction of frequency mixer Base body Front-end Design, be convenient to the application of frequency mixer in low temperature environment simultaneously.
Technical solution of the present invention is:
A kind of compact low temperature second harmonic frequency mixer pedestal comprises: the heat conduction is supported and Base body; Base body comprises signal input waveguide structure, reference signal input waveguide structure, mixing chip groove, high-frequency adapter chamber and output signal port;
It is horizontal contact-making surface that the bottom surface is supported in the heat conduction of L-type, the side is on vertical contact-making surface and the vertical contact-making surface engraved structure to be arranged, and described Base body is fixed together with the vertical contact-making surface that the heat conduction is supported and the signal input waveguide structure of Base body leans out from heat is conducted engraved structure on the support side;
The signal input waveguide structure that is used for the reference signal input waveguide structure of input reference signal and is used for the input measured signal is positioned at two end faces of the mutual opposition of described Base body;
Described signal input waveguide structure comprises again measured signal input port, measured signal input waveguide, signal input waveguide changeover portion and measured signal input half high waveguide;
Described reference signal input waveguide structure comprises again reference signal input port, reference signal input waveguide, reference signal input waveguide changeover portion and reference signal input half high waveguide;
Described measured signal input port is arranged in described signal input waveguide structure and leans out on the end face of part from heat conduction support side engraved structure, the measured signal input waveguide is deep into the inside of described Base body from described measured signal input port, connect as one by signal input waveguide changeover portion between measured signal input waveguide and the measured signal input half high waveguide, leave signal input part signal coupling mouth in the measured signal input half high waveguide;
Described reference signal input port is positioned at described Base body and contacts with heat conduction support side on the opposite of end face, the reference signal input waveguide is deep into the inside of described Base body from described reference signal input port, connect as one by reference signal input waveguide changeover portion between reference signal input waveguide and the reference signal input half high waveguide, leave reference signal input end signal coupling aperture in the reference signal input half high waveguide;
One end of mixing chip groove is by described signal input part signal coupling mouth and the partly high waveguide of measured signal input UNICOM, the other end is by described reference signal input end signal coupling aperture and high-frequency adapter chamber UNICOM, simultaneously, mixing chip groove passes reference signal input half high waveguide high-frequency adapter chamber, reference signal input waveguide structure and signal input waveguide structure UNICOM is in the same place; The output signal port is connected the signal output as described compact low temperature second harmonic frequency mixer pedestal with the high-frequency adapter chamber.
The height that described measured signal input half high waveguide and measured signal input waveguide are rectangular waveguide and measured signal input half high waveguide is half of measured signal input waveguide height.
Described measured signal input waveguide is all parallel with the horizontal contact-making surface in bottom surface that the heat conduction is supported with the reference signal input waveguide.
Described mixing chip groove is all vertical with the reference signal input waveguide with the measured signal input waveguide.
Described output signal port is all parallel with the reference signal input waveguide with the measured signal input waveguide.
The opening direction of described output signal port is identical with the opening direction of measured signal input port.
The present invention's beneficial effect compared with prior art is:
(1) thus the present invention is owing to having adopted the high-frequency adapter chamber to take full advantage of the size difference of second harmonic frequency mixer standard input Waveguide interface, so that signal output is able to draw from the front portion of frequency mixer main body, the structure that goes out before entering before such has satisfied the superintegrated requirement of arrayed applications.
(2) the present invention supports by the conduction of L-type heat is set in Base body input and output side, and the engraved structure that conducts the vertical plane that supports by L-type heat reaches abundant thermo-contact, improves the heat conduction efficiency of contact-making surface.Such L-type hollow out conduction is supported and has been satisfied the requirement that low temperature environment is used.
Description of drawings
Fig. 1 is frequency mixer base construction schematic diagram of the present invention;
Fig. 2 is frequency mixer base construction cutaway view of the present invention;
Fig. 3 is the present invention's heat conduction supporting construction schematic diagram;
Fig. 4 is Base body cutaway view of the present invention.
Embodiment
The invention provides a kind of compact low temperature second harmonic frequency mixer pedestal, as shown in Figure 1 and Figure 2, comprising: heat conduction support 1 and Base body 7; Base body 7 comprises signal input waveguide structure 2, reference signal input waveguide structure 3, mixing chip groove 4, high-frequency adapter chamber 5 and output signal port 6;
As shown in Figure 3, it is horizontal contact-making surface that 1 bottom surface 11 is supported in the heat conduction of L-type, side 12 is for having engraved structure 13 on vertical contact-making surface and the vertical contact-making surface, described Base body 7 and heat conduction support that 1 vertical contact-making surface is fixed together and the engraved structure 13 of signal input waveguide structure 2 from heat conduction support 1 side 12 of Base body 7 lean out;
The signal input waveguide structure 2 that is used for the reference signal input waveguide structure 3 of input reference signal and is used for the input measured signal is positioned at two end faces of the mutual opposition of described Base body 7;
As shown in Figure 4, signal input waveguide structure 2 comprises again measured signal input port 21, measured signal input waveguide 22, signal input waveguide changeover portion 23 and measured signal input half high waveguide 25; Reference signal input waveguide structure 3 comprises again reference signal input port 31, reference signal input waveguide 32, reference signal input waveguide changeover portion 33 and reference signal input half high waveguide 35;
Measured signal input port 21 is arranged in described signal input waveguide structure 2 and leans out on the end face of part from heat conduction support 1 side engraved structure, measured signal input waveguide 22 is deep into the inside of described Base body 7 from described measured signal input port 21, connect as one by signal input waveguide changeover portion 23 between measured signal input waveguide 22 and the measured signal input half high waveguide 25, leave signal input part signal coupling mouth 24 in the measured signal input half high waveguide 25;
The height that measured signal input half high waveguide 25 and measured signal input waveguide 22 are rectangular waveguide and measured signal input half high waveguide 25 is highly half of measured signal input waveguide 22.
Reference signal input port 31 is positioned at described Base body 7 and heat conduction and supports 1 side and contact on the opposite of end face, reference signal input waveguide 32 is deep into the inside of described Base body 7 from described reference signal input port 31, connect as one by reference signal input waveguide changeover portion 33 between reference signal input waveguide 32 and the reference signal input half high waveguide 35, leave reference signal input end signal coupling aperture 34 in the reference signal input half high waveguide 35;
Measured signal input waveguide 22 is all parallel with the horizontal contact-making surface in bottom surface of heat conduction support 1 with reference signal input waveguide 32.
One end of mixing chip groove 4 is by described signal input part signal coupling mouth 24 and the partly high waveguide of measured signal input 25 UNICOMs, the other end is by described reference signal input end signal coupling aperture 34 and high-frequency adapter chamber 5 UNICOMs, and mixing chip groove 4 is coupling aperture 51 with the UNICOM position in high-frequency adapter chamber 5; Simultaneously, mixing chip groove 4 also passes reference signal input half high waveguide 35 high-frequency adapter chamber 5, reference signal input waveguide structure 3 and signal input waveguide structure 2 UNICOMs is in the same place; Mixing chip groove 4 is all vertical with reference signal input waveguide 32 with measured signal input waveguide 22.Output signal port 6 is connected the signal output as described compact low temperature second harmonic frequency mixer pedestal with high-frequency adapter chamber 5, output signal port 6 is all parallel with reference signal input waveguide 32 with measured signal input waveguide 22, and the opening direction of output signal port 6 is identical with the opening direction of measured signal input port 21.
For the second harmonic frequency mixer, the measured signal frequency is about the twice of reference signal frequency, because reference signal and measured signal all need be by the accesses of standard waveguide flange, therefore measured signal input port 21 is little more a lot of than reference signal input port 31 dimensionally.Measured signal input port 21 and reference signal input port 31 are on two end faces that Base body opposes mutually, and the height of Base body is identical with reference signal standard input waveguide flange diameter, so there is larger spatial margin on 21 sides in the measured signal input port.We are provided with the signal output 6 of sub-miniature A connector form herein.
When compact low temperature second harmonic frequency mixer pedestal is worked, microwave signal to be measured enters from measured signal input waveguide 22, enter measured signal input half high waveguide 25 via signal input waveguide changeover portion 23, enter again the second harmonic mixing groove 41 of mixing chip groove 4 by signal input part signal coupling mouth 24, simultaneously approximately be that half reference signal of measured signal frequency enters Base body from reference signal input waveguide 32, enter reference signal input half high waveguide 35 via reference signal input waveguide changeover portion 33, enter second harmonic mixing groove 41 by reference signal input end signal coupling aperture 34 again.In the second harmonic mixing groove 41 mixting circuit is installed, measured signal and reference signal are via exporting intermediate-freuqncy signal after the mixting circuit mixing.The intermediate frequency output signal is passed reference signal input half high waveguide 35 and is entered mixing and filtering groove 42, via entering high-frequency adapter chamber 5 after the mixing and filtering circuit filtering in the mixing and filtering groove 42, at last from signal output 6 outputs.
Here we take full advantage of the size difference of second harmonic frequency mixer standard input Waveguide interface, allow measured signal input port 21 and reference signal input port 31 on two end faces that Base body opposes mutually, allow simultaneously common size and the reference signal input port 31 of measured signal input port 21 and signal output 6 measure-alike, make the vertical cross-section of Base body reach minimum, realized compact structure.Base body input and output side arranges the conduction of L-type heat and supports 1, and the engraved structure 13 that conducts the vertical plane that supports by L-type heat reaches abundant thermo-contact, improves the heat conduction efficiency of contact-making surface.Such L-type hollow out conduction is supported and has been satisfied the requirement that low temperature environment is used.
Because the structure that goes out before entering before compact low temperature second harmonic frequency mixer pedestal has adopted, four sides in Base body are not provided with input/output interface, so that a plurality of Base body can be closely aligned together, realize the non-sparse collection of millimeter wave frequency band frequency mixer under low temperature environment.
Claims (6)
1. a compact low temperature second harmonic frequency mixer pedestal is characterized in that comprising: heat conduction support (1) and Base body (7); Base body (7) comprises signal input waveguide structure (2), reference signal input waveguide structure (3), mixing chip groove (4), high-frequency adapter chamber (5) and output signal port (6);
It is horizontal contact-making surface that (1) bottom surface is supported in the heat conduction of L-type, the side is on vertical contact-making surface and the vertical contact-making surface engraved structure to be arranged, the vertical contact-making surface that (1) is supported in described Base body (7) and heat conduction be fixed together and the engraved structure of signal input waveguide structure (2) from heat conduction support (1) side of Base body (7) lean out;
The signal input waveguide structure (2) that is used for the reference signal input waveguide structure (3) of input reference signal and is used for the input measured signal is positioned at two end faces of the mutual opposition of described Base body (7);
Described signal input waveguide structure (2) comprises again measured signal input port (21), measured signal input waveguide (22), measured signal input waveguide changeover portion (23) and measured signal input half high waveguide (25);
Described reference signal input waveguide structure (3) comprises again reference signal input port (31), reference signal input waveguide (32), reference signal input waveguide changeover portion (33) and reference signal input half high waveguide (35);
Described measured signal input port (21) is arranged in described signal input waveguide structure (2) and leans out on the end face of part from heat conduction support (1) side engraved structure, measured signal input waveguide (22) is deep into the inside of described Base body (7) from described measured signal input port (21), connect as one by signal input waveguide changeover portion (23) between measured signal input waveguide (22) and the measured signal input half high waveguide (25), leave signal input part signal coupling mouth (24) in the measured signal input half high waveguide (25);
Described reference signal input port (31) is positioned at described Base body (7) and heat conduction and supports (1) side and contact on the opposite of end face, reference signal input waveguide (32) is deep into the inside of described Base body (7) from described reference signal input port (31), connect as one by reference signal input waveguide changeover portion (33) between reference signal input waveguide (32) and the reference signal input half high waveguide (35), leave reference signal input end signal coupling aperture (34) in the reference signal input half high waveguide (35);
One end of mixing chip groove (4) is by described signal input part signal coupling mouth (24) and measured signal input half high waveguide (25) UNICOM, the other end is by described reference signal input end signal coupling aperture (34) and high-frequency adapter chamber (5) UNICOM, simultaneously, mixing chip groove (4) also passes reference signal input half high waveguide (35) with high-frequency adapter chamber (5), reference signal input waveguide structure (3) and signal input waveguide structure (2) UNICOM together; Output signal port (6) is connected the signal output as described compact low temperature second harmonic frequency mixer pedestal with high-frequency adapter chamber (5).
2. a kind of compact low temperature second harmonic frequency mixer pedestal according to claim 1 is characterized in that: the height that described measured signal input half high waveguide (25) and measured signal input waveguide (22) are rectangular waveguide and measured signal input half high waveguide (25) is highly half of measured signal input waveguide (22).
3. a kind of compact low temperature second harmonic frequency mixer pedestal according to claim 1 is characterized in that: all to support the horizontal contact-making surface in bottom surface of (1) parallel with the heat conduction for described measured signal input waveguide (22) and reference signal input waveguide (32).
4. a kind of compact low temperature second harmonic frequency mixer pedestal according to claim 1, it is characterized in that: described mixing chip groove (4) is all vertical with reference signal input waveguide (32) with measured signal input waveguide (22).
5. a kind of compact low temperature second harmonic frequency mixer pedestal according to claim 1, it is characterized in that: described output signal port (6) is all parallel with reference signal input waveguide (32) with measured signal input waveguide (22).
6. a kind of compact low temperature second harmonic frequency mixer pedestal according to claim 1, it is characterized in that: the opening direction of described output signal port (6) is identical with the opening direction of measured signal input port (21).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210574932.8A CN103022604B (en) | 2012-12-26 | 2012-12-26 | Compact type low-temperature second harmonic mixer base |
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| CN201210574932.8A CN103022604B (en) | 2012-12-26 | 2012-12-26 | Compact type low-temperature second harmonic mixer base |
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| CN103022604B CN103022604B (en) | 2014-12-24 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5926129A (en) * | 1996-11-23 | 1999-07-20 | Matra Bae Dynamics (Uk) Limited | Transceivers |
| CN101609916A (en) * | 2009-06-18 | 2009-12-23 | 电子科技大学 | A kind of 18-40GHz double balanced mixer of star structure |
| CN102005631A (en) * | 2010-10-15 | 2011-04-06 | 中国科学院紫金山天文台 | Base of waveguide sideband-separating superconducting tunnel junction mixer |
-
2012
- 2012-12-26 CN CN201210574932.8A patent/CN103022604B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5926129A (en) * | 1996-11-23 | 1999-07-20 | Matra Bae Dynamics (Uk) Limited | Transceivers |
| CN101609916A (en) * | 2009-06-18 | 2009-12-23 | 电子科技大学 | A kind of 18-40GHz double balanced mixer of star structure |
| CN102005631A (en) * | 2010-10-15 | 2011-04-06 | 中国科学院紫金山天文台 | Base of waveguide sideband-separating superconducting tunnel junction mixer |
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Effective date of registration: 20180529 Address after: 313216 No. 58 Nanyang Road, Qian Yuan Town, Deqing County, Huzhou, Zhejiang Patentee after: Aerospace Nanyang (Zhejiang) Technology Co., Ltd. Address before: No. 17 Yungang Road, Fengtai District, Beijing Patentee before: China Aerospace Aerodynamic Technology Institute |
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