CN1825684A - Substrate integrated waveguide single balance mixer - Google Patents
Substrate integrated waveguide single balance mixer Download PDFInfo
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- CN1825684A CN1825684A CN 200610038499 CN200610038499A CN1825684A CN 1825684 A CN1825684 A CN 1825684A CN 200610038499 CN200610038499 CN 200610038499 CN 200610038499 A CN200610038499 A CN 200610038499A CN 1825684 A CN1825684 A CN 1825684A
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Abstract
This invention discloses a chip integrated waveguide single-balance mixer including a 90deg. integrated waveguide directional coupler, a serial mixer tube pair is connected between the through end and the coupling end of the coupler and nodes between the mixer tube pairs are connected with an IF output end, in which, the coupler includes medium chips with metallic pastes at both sides and two waveguide cavities are set on the medium chips, a coupling hole is set between the two cavities, a RF input and a through end are set at either end of a cavity, a local input and a coupling end are set at either end of the other cavity.
Description
Technical field
The present invention relates to a kind of microwave and millimeter wave frequency mixer, relate in particular to a kind of substrate integrated waveguide 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 invention provides the integrated-type substrate integrated waveguide single balance mixer that a kind of loss is low and the frequency conversion performance is high.
The present invention adopts following technical scheme:
A kind of substrate integrated waveguide 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 present invention 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.
Beneficial effect of the present invention is as follows:
The present invention 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 substrate integrated waveguide single balance mixer structure of the present invention, 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 present invention has following advantage:
1) this substrate integrated waveguide 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 invention.
Fig. 2 is a substrate integrated waveguide directioning coupler domain of the present invention.
Fig. 3 is a test of the present invention 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 substrate integrated waveguide 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 present invention has 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 | ε 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 substrate integrated waveguide 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, substrate integrated waveguide 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 200610038499 CN1825684A (en) | 2006-02-27 | 2006-02-27 | Substrate integrated waveguide single balance mixer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610038499 CN1825684A (en) | 2006-02-27 | 2006-02-27 | Substrate integrated waveguide single balance mixer |
Publications (1)
| Publication Number | Publication Date |
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| CN1825684A true CN1825684A (en) | 2006-08-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200610038499 Pending CN1825684A (en) | 2006-02-27 | 2006-02-27 | Substrate integrated waveguide single balance mixer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106301230A (en) * | 2016-08-24 | 2017-01-04 | 中国工程物理研究院电子工程研究所 | A kind of based on the thick substrate integrated single balance mixer of Schottky diode CPW |
-
2006
- 2006-02-27 CN CN 200610038499 patent/CN1825684A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106301230A (en) * | 2016-08-24 | 2017-01-04 | 中国工程物理研究院电子工程研究所 | A kind of based on the thick substrate integrated single balance mixer of Schottky diode CPW |
| CN106301230B (en) * | 2016-08-24 | 2019-04-19 | 中国工程物理研究院电子工程研究所 | One kind integrating single balance mixer based on thick substrate Schottky diode CPW |
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