CN2867624Y - Microwave single-balanced mixer - Google Patents
Microwave single-balanced mixer Download PDFInfo
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- CN2867624Y CN2867624Y CN 200620069614 CN200620069614U CN2867624Y CN 2867624 Y CN2867624 Y CN 2867624Y CN 200620069614 CN200620069614 CN 200620069614 CN 200620069614 U CN200620069614 U CN 200620069614U CN 2867624 Y CN2867624 Y CN 2867624Y
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- integrated waveguide
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- substrate integrated
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Abstract
The utility model discloses a microwave single balanced mixer. It includes 90 degree directional coupler (I) based on substrate integrated waveguide. Series connected mixer tube pair is connected between the straight-through terminal and the coupling terminal of the 90 degree directional coupler (I) based on substrate integrated waveguide, and the nodes between the series connected mixer tube pair are connected to intermediate frequency output terminal. The 90 degree directional coupler (I) based on substrate integrated waveguide includes dielectric substrate with metal patch disposed on both surfaces, on which is provided two substrate-integrated waveguide circular cavities; wherein between the two substrate-integrated waveguide circular cavities is disposed couple hole, on both ends of a first substrate-integrated waveguide circular cavity are respectively provided radio frequency input terminal and straight-through terminal, and on both ends of a second substrate-integrated waveguide circular cavity are respectively provided local oscillation input terminal and coupling terminal. The utility model has the advantages of easiness of integrated design of the microwave single balanced mixer in microwave/millimeter wave circuit, high frequency mixing efficiency, and wide band width.
Description
Technical field
The utility model relates to a kind of microwave and millimeter wave frequency mixer, relates in particular to a kind of microwave single balance mixer that can be used for the microwave and millimeter wave circuit design.
Background technology
Microwave mixer has obtained a large amount of application in the microwave and millimeter wave radio system, it is critical component of transceiver, and the high-frequency microwave signal that receives is downconverted to intermediate-freuqncy signal, so that further handle and restoring signal; Perhaps with the intermediate-freuqncy signal up-conversion to the microwave and millimeter wave signal, so that it is at spatial transmission.Development of Communication Technique requires each parts to be easy to integrated, miniaturization, lightweight and high reliability, and the quality of frequency mixer performance directly influences the performance of whole system.Traditional microwave mixer, owing to adopted the passive circuit of microstrip structure, the leakage of energy, radiation and interference are big, conversion efficiency is lower; Loss for the higher microwave and millimeter wave frequency range performance of frequency is more remarkable.This class formation need occupy the circuit board surface zone simultaneously, to such an extent as to make the integrated level of the whole microwave and millimeter wave of frequency mixer system reduce.Therefore, need to propose new type of microwave millimeter wave single balance mixer, to realize high-performance, low-loss, low cost, to be easy to integrated target.
Summary of the invention
The utility model provides the integrated-type microwave that a kind of loss is low and the frequency conversion performance is high single balance mixer.
The utility model adopts following technical scheme:
A kind of microwave single balance mixer that is used for the microwave and millimeter wave circuit, comprise 90 ° of substrate integrated waveguide directioning coupler I, it is right to be connected with the mixer tube of connecting between the straight-through end of 90 ° of substrate integrated waveguide directioning coupler I and coupled end, the mixer tube of series connection between node connect medium frequency output end, above-mentioned 90 ° of substrate integrated waveguide directioning coupler I comprise the two-sided dielectric substrate that is provided with metal patch, on dielectric substrate, be provided with two substrate integrated wave-guide cavity waves, between two substrate integrated wave-guide cavity waves, be provided with coupling aperture, the two ends of a substrate integrated wave-guide cavity wave are respectively equipped with rf inputs and straight-through end therein, are respectively equipped with local oscillator input and coupled end at the two ends of another substrate integrated wave-guide cavity wave.
The utility model adopts single balanced mixing scheme, adopts the power division device of 90 degree substrate integrated waveguide directioning couplers as local oscillator and radio frequency, adopts non-linear Schottky diode as the mixing nonlinear device.Radio frequency (RF) signal input part and local oscillator input be isolation end each other, radiofrequency signal is divided into the two-way constant amplitude by directional coupler but the signal of phase phasic difference 90 degree is added to respectively on two diodes, equally, local oscillator (LO) signal is divided into the two-way constant amplitude by directional coupler but the signal of phase phasic difference 90 degree also is added to respectively on two diodes, utilizing the non-linear difference signal that produces local oscillator and radio frequency of diode, also is intermediate frequency (IF) signal.By other harmonic wave of low pass filter filters out, take out intermediate-freuqncy signal, just finished by the optical mixing process of radiofrequency signal to intermediate-freuqncy signal.Can respectively connect one section 1/4 wavelength (90 degree phase shift) short-circuit line at the diode pair two ends, for local oscillator and radiofrequency signal,, for intermediate-freuqncy signal, be short circuit, prevent that intermediate-freuqncy signal from leaking into rf inputs for open circuit.Between two diodes, can connect one 1/4 wavelength (90 degree phase shift) open-circuit line and be used to prevent that local oscillation signal from leaking into medium frequency output end.In intermediate frequency port, designed little band step impedance conversion low pass filter, be used to isolate radio frequency and local oscillation signal.
The beneficial effects of the utility model are as follows:
The utility model is based on the microwave single balance mixer of substrate integrated waveguide technology design.At first on dielectric substrate, realized having high Q value, low-loss substrate integration wave-guide.This guided wave structure formed have transmission characteristic and the field distribution similar with the rectangular metal waveguide; Then, utilize substrate integration wave-guide to form 90 degree substrate integrated waveguide directioning couplers.It is right to add mixer tube between two outputs of integrated waveguide directioning coupler, and its mixed product is exported after filtering.In this microwave single balance mixer structure of the present utility model, the design of substrate integrated waveguide technology design with the microwave single balance mixer combined; Use 90 degree substrate integrated waveguide directioning couplers as the local oscillation signal of frequency mixer and the power division device of radiofrequency signal, realized the mixing function on this basis.Compared with prior art, the utlity model has following advantage:
1) this microwave single balance mixer is easy to integrated in the design of microwave and millimeter wave circuit.This is because the directional coupler that this frequency mixer adopted not only can be realized on the single-layer medium substrate, and can realize in the inside of multilayer dielectricity substrate.
2) mixing efficiency height.Because the loss of dielectric substrate guide technology is low, mixing efficiency is improved.
3) broader bandwidth.After substrate integrated waveguide technology is applied to mixting circuit, has the bandwidth of broad.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is a substrate integrated waveguide directioning coupler domain of the present utility model.
Fig. 3 is a test of the present utility model substrate integrated waveguide directioning coupler domain.
Fig. 4 inserts the curve chart that loss changes with local oscillation power.
Fig. 5 inserts the curve that the frequent rate of loss carried as side-arm changes.
Embodiment
A kind of microwave single balance mixer that is used for the microwave and millimeter wave circuit, comprise 90 ° of substrate integrated waveguide directioning coupler I, between the straight-through end 112 of 90 ° of substrate integrated waveguide directioning coupler I and coupled end 122, be connected with the mixer tube of connecting to 51,52, the mixer tube of series connection is to 51, node between 52 connects medium frequency output end, above-mentioned 90 ° of substrate integrated waveguide directioning coupler I comprise the two-sided metal patch 2 that is provided with, 3 dielectric substrate 1, on dielectric substrate 1, be provided with two substrate integrated wave- guide cavity waves 11,12, at two substrate integrated wave-guide cavity waves 11, be provided with coupling aperture 4 between 12, the two ends of a substrate integrated wave-guide cavity wave 11 are respectively equipped with rf inputs 111 and straight-through end 112 therein, are respectively equipped with local oscillator input 121 and coupled end 122 at the two ends of another substrate integrated wave-guide cavity wave 12.Above-mentioned substrate integrated wave-guide cavity wave surrounds and constitutes by being located at plated-through hole 9 on the dielectric substrate 1.
The utility model has been realized the substrate integration wave-guide frequency mixer of above introduction at X-band, and adopting thickness is the dielectric substrate of 0.5mm, and electric relatively dielectric constant is 2.4, and as shown in drawings, other parameter is as follows:
| a | s | D | tl | tw | ∈ r |
| 14.25mm | 0.8mm | 0.4mm | 20.5mm | 7.2mm | 2.4 |
| w1 | w2 | l1 | l2 | l3 | h |
| 1.2mm | 0.7mm | 4.0mm | 9.6mm | 9.6mm | 2.8mm |
Below be test result:
Fig. 4 has compared the conversion loss curve of emulation and actual measurement, and wherein rf frequency is 10GHz, and local frequency is 11.92GHz.When local oscillation power was 8dBm, the conversion loss of actual measurement was 6.8dB.Among Fig. 5, local frequency fixedly installs and is 12GHz, and to rf frequency scanning, test result is presented under the test condition of high local oscillator, and rf frequency is in the wideband segment limit of 9GHz to 12GHz, and conversion loss is all less than 10dB.
Claims (2)
1, a kind of microwave single balance mixer that is used for the microwave and millimeter wave circuit, it is characterized in that comprising 90 ° of substrate integrated waveguide directioning couplers (I), between the straight-through end (112) of 90 ° of substrate integrated waveguide directioning couplers (I) and coupled end (122), be connected with the mixer tube of connecting to (51,52), the mixer tube of series connection is to (51,52) node between connects medium frequency output end, above-mentioned 90 ° of substrate integrated waveguide directioning couplers (I) comprise the two-sided metal patch (2 that is provided with, 3) dielectric substrate (1), on dielectric substrate (1), be provided with two substrate integrated wave-guide cavity waves (11,12), at two substrate integrated wave-guide cavity waves (11,12) be provided with coupling aperture (4) between, the two ends of a substrate integrated wave-guide cavity wave (11) are respectively equipped with rf inputs (111) and straight-through end (112) therein, are respectively equipped with local oscillator input (121) and coupled end (122) at the two ends of another substrate integrated wave-guide cavity wave (12).
2, microwave single balance mixer according to claim 1 is characterized in that substrate integrated wave-guide cavity wave surrounds formation by the plated-through hole (9) that is located on the dielectric substrate (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620069614 CN2867624Y (en) | 2006-02-27 | 2006-02-27 | Microwave single-balanced mixer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620069614 CN2867624Y (en) | 2006-02-27 | 2006-02-27 | Microwave single-balanced mixer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2867624Y true CN2867624Y (en) | 2007-02-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620069614 Expired - Lifetime CN2867624Y (en) | 2006-02-27 | 2006-02-27 | Microwave single-balanced mixer |
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| CN (1) | CN2867624Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104868852A (en) * | 2015-04-21 | 2015-08-26 | 中国电子科技集团公司第四十一研究所 | Passive double balanced mixer based on novel groove line-microstrip Balun |
| CN108777354A (en) * | 2018-05-25 | 2018-11-09 | 南京理工大学 | A kind of micro-strip paster antenna based on the load of SIW resonant cavities |
-
2006
- 2006-02-27 CN CN 200620069614 patent/CN2867624Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104868852A (en) * | 2015-04-21 | 2015-08-26 | 中国电子科技集团公司第四十一研究所 | Passive double balanced mixer based on novel groove line-microstrip Balun |
| CN104868852B (en) * | 2015-04-21 | 2017-11-14 | 中国电子科技集团公司第四十一研究所 | A kind of passive double balanced mixer based on new line of rabbet joint microstrip balun |
| CN108777354A (en) * | 2018-05-25 | 2018-11-09 | 南京理工大学 | A kind of micro-strip paster antenna based on the load of SIW resonant cavities |
| CN108777354B (en) * | 2018-05-25 | 2020-01-03 | 南京理工大学 | Microstrip patch antenna based on loading of SIW resonant cavity |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20070207 |
|
| EXPY | Termination of patent right or utility model |