CN105261815A - Waveguide and microwave transition circuit with adjustable working frequency - Google Patents
Waveguide and microwave transition circuit with adjustable working frequency Download PDFInfo
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- CN105261815A CN105261815A CN201510698888.5A CN201510698888A CN105261815A CN 105261815 A CN105261815 A CN 105261815A CN 201510698888 A CN201510698888 A CN 201510698888A CN 105261815 A CN105261815 A CN 105261815A
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Abstract
The invention relates to a waveguide and microwave transition circuit with adjustable working frequency. The problem in the prior art that the dimensional tolerance of the waveguide and microwave transition circuit is small and the working frequency thereof is not adjustable is solved. A polytetrafluoroethylene (PTFE) sleeve is inserted into a metal cylindrical channel. One end of the PTFE sleeve completely contacts the lower surface of a micro-strip circuit, and the other end of the PTFE sleeve completely contacts the lower surface of a waveguide through hole. The centers of a circular through hole, an insulating through hole and the PTFE sleeve correspond to one another in the vertical direction. The front end of a metal probe is inserted into the PTFE sleeve through the circular through hole of a circular metal bonding pad, and the tail end of the metal probe is fixedly installed on the micro-strip circuit. A rectangular metal block is movably installed at the tail end of the output of the waveguide through hole, and the cross section of the rectangular metal block is of the same shape and size as that of the waveguide through hole. According to the invention, microwave signals in different frequency bands can be transmitted between a rectangular waveguide and a micro-strip transmission line. The waveguide and microwave transition circuit has the characteristics of large circuit dimension tolerance and adjustable working frequency.
Description
Technical field
The present invention relates to microwave and millimeter wave device arts, specifically a kind of waveguide and microwave transition circuit with working frequency range adjustable function.
Background technology
In microwave and millimeter wave, microstrip line is a kind of very important transmission form in microwave integrated circuit, but the interface of current many millimeter wave test macros and device all adopts rectangular waveguide, therefore, waveguide-microstrip transition circuit is widely used in the detection of millimeter wave monolithic integrated circuit and hybrid circuit and the connection of waveguide and planar circuit, to make having good matching transition between two kinds of transmission lines.Therefore waveguide-microstrip transition technology becomes one of key technology of system realization, is subject to extensive research.
And constantly develop to high band along with microwave and millimeter wave test macro and device operating frequencies, common waveguide-microstrip transition circuit is due to its nonadjustable characteristic, usually face mismachining tolerance and affect circuit working frequency range, even cause the problem of mating deterioration between waveguide, micro-band two kinds of transmission lines.How to develop a kind of waveguide-microwave transition circuit that can carry out working frequency range fine setting and become the technical problem being badly in need of solving.
Summary of the invention
The object of the invention is to solve the little and nonadjustable defect of working frequency range of waveguide in prior art-microstrip transition circuit size tolerance, provide a kind of there is working frequency range adjustable function waveguide and microwave transition circuit solve the problems referred to above.
To achieve these goals, technical scheme of the present invention is as follows:
A kind of waveguide and microwave transition circuit with working frequency range adjustable function, comprise metallic cavity structure, the upper lateral of metallic cavity structure is provided with cavity, the middle part of metallic cavity structure is laterally provided with waveguide through hole, waveguide through hole parallels with cavity, metallic cavity structure is longitudinally provided with metal cylinder passage and metal cylinder passage respectively with waveguide through hole and cavity perpendicular, metal cylinder passage all communicates with waveguide through hole and cavity
In described cavity, microstrip circuit is installed, the output of microstrip circuit is 50 Ω microstrip transmission lines, the input of microstrip circuit is circular metal land, circular metal land is provided with manhole, the ground metal layer of microstrip circuit is provided with insulated vias, the diameter of insulated vias is greater than manhole, and the ground metal layer of microstrip circuit is welded on the upper surface of cavity;
Tetrafluoro cover is inserted with in described metal cylinder passage, one end of tetrafluoro cover contacts completely with the lower surface of microstrip circuit, the other end of tetrafluoro cover contacts completely with the lower surface of waveguide through hole, the center of circle of manhole, insulated vias and tetrafluoro cover three is corresponding up and down, the front end of metal probe is inserted in tetrafluoro cover by the manhole of circular metal land, and the tail end of metal probe is fixedly mounted on microstrip circuit; Rectangular metal block is movably arranged on the output end of waveguide through hole, and profile, the size in rectangular metal block cross section are all identical with waveguide through hole cross section.
The bottom of described metallic cavity structure has screwed hole, and screwed hole is positioned at the below of rectangular metal block, and lock-screw to be arranged on screwed hole and to be against on rectangular metal block.
Described waveguide through hole long for 25mm, wide be 10.67mm, high be 4.32mm, the diameter of metal cylinder passage is 2.4mm, the degree of depth of cavity is 8mm, length is 15mm, width is 8mm, the dielectric substrate of microstrip circuit is Rogers5880, the dielectric substrate thickness of microstrip circuit is 0.254mm, 50 Ω microstrip transmission line live widths of microstrip circuit output are 0.76mm, and the diameter of circular metal land is 1.5mm, and the diameter of insulated vias is 2mm.
The tail end of described metal probe is the long 1mm of being, the wide 0.7mm of being, height are the rectangular configuration of 0.5mm, and the diameter of metal probe front end is 0.7mm.
The internal diameter of described tetrafluoro cover is identical with the external diameter of metal probe, and the external diameter of tetrafluoro cover is identical with the internal diameter of metal cylinder passage.
beneficial effect
A kind of waveguide and microwave transition circuit with working frequency range adjustable function of the present invention, compared with prior art can realize the transmission of different frequency range microwave signal between rectangular waveguide and microstrip transmission line, there is the outstanding characteristic that circuit size tolerance is large and working frequency range is adjustable, reduce microwave system (particularly submillimeter wave, millimeter wave microwave system) and build difficulty.Have the advantages that structure simply, is easily processed, signal transmission attenuation is little, working frequency range is adjustable.
Accompanying drawing explanation
Fig. 1 is structural perspective of the present invention;
Fig. 2 is side sectional view of the present invention;
Fig. 3 is the schematic enlarged-scale view of manhole and insulated vias joint in the present invention;
Fig. 4 is circuit parameter analysis chart when tetrafluoro cover inner ring distance rectangular metal block is 2.47mm in the present invention;
Fig. 5 is circuit parameter analysis chart when tetrafluoro cover inner ring distance rectangular metal block is 2.13mm in the present invention;
Wherein, 1-metallic cavity structure, 2-microstrip circuit, 3-metal probe, 4-metal cylinder passage, 5-waveguide through hole, 6-screwed hole, 7-lock-screw, 8-rectangular metal block, 9-cavity, 10-tetrafluoro cover, 11-circular metal land, 12-manhole, 13-insulated vias.
Embodiment
For making to have a better understanding and awareness architectural feature of the present invention and effect of reaching, coordinating detailed description in order to preferred embodiment and accompanying drawing, being described as follows:
As depicted in figs. 1 and 2, a kind of waveguide and microwave transition circuit with working frequency range adjustable function of the present invention, comprise metallic cavity structure 1, the upper lateral (level) of metallic cavity structure 1 is provided with cavity 9, cavity 9 is for connecting microstrip line, the middle part horizontal (level) of metallic cavity structure 1 is provided with waveguide through hole 5, and waveguide through hole 5 is for connecting rectangular waveguide.Metal cylinder passage 4 longitudinal (vertically) is arranged in metallic cavity structure 1, metal cylinder passage 4, waveguide through hole 5 and cavity 9 can be the structure of solidification design in metallic cavity structure 1, lay respectively at the longitudinal middle part of metallic cavity structure 1, horizontal top and lateral middle, the long L of waveguide through hole 5, wide a, high b are respectively 25mm, 10.67mm, 4.32mm, degree of depth h3, length L3, the wide w3 of cavity 9 are respectively 8mm, 15mm, 8mm, and waveguide through hole 5 parallels with both cavitys 9.Metal cylinder passage 4 respectively with waveguide through hole 5 and cavity 9 perpendicular, the diameter of phi d2 of metal cylinder passage 4 is 2.4mm, metal cylinder passage 4 for tetrafluoro cover 10 installation, it communicates with waveguide through hole 5 and cavity 9.
Microstrip circuit 2 is installed in cavity 9, microstrip circuit 2 can be Rogers5880, the thickness h of microstrip circuit 2 dielectric substrate is 0.254mm.The output of microstrip circuit 2 is 50 Ω microstrip transmission lines, and 50 Ω microstrip transmission line live width w are 0.76mm.The input of microstrip circuit 2 is circular metal land 11, and the diameter of phi d3 of circular metal land 11 is 1.5mm.As shown in Figure 3, circular metal land 11 is provided with manhole 12, for passing of metal probe 3.The ground metal layer of microstrip circuit 2 is welded on the upper surface of cavity 9, the ground metal layer of microstrip circuit 2 is provided with insulated vias 13, the diameter of phi d3 of insulated vias 13 can be 2mm, namely on the bottom (ground metal layer) of microstrip circuit 2, a hole is established, the diameter of insulated vias 13 is greater than manhole 12, contacts with metal probe 3 to avoid the ground metal layer of microstrip circuit 2.
Tetrafluoro cover 10 is inserted with in metal cylinder passage 4, the external diameter of tetrafluoro cover 10 is identical with the internal diameter of metal cylinder passage 4, one end of tetrafluoro cover 10 contacts completely with the lower surface of microstrip circuit 2, the other end of tetrafluoro cover 10 contacts completely with the lower surface of waveguide through hole 5, and the circumference that namely tetrafluoro overlaps 10 two ends contacts with the lower surface of microstrip circuit 2 or the lower surface of waveguide through hole 5 respectively.The center of circle that manhole 12, insulated vias 13 and tetrafluoro overlap 10 threes is corresponding up and down, so that the insertion of metal probe 3.The tail end of metal probe 3 can be rectangular configuration, i.e. rectangular metal block, and rectangular metal block length L4, wide w4, high h4 are respectively 1mm, 0.7mm, 0.5mm, and the diameter of phi d1 of metal probe 3 front end is 0.7mm.The front end of metal probe 3 is inserted in tetrafluoro cover 10 by the manhole 12 of circular metal land 11, and the internal diameter of tetrafluoro cover 10 is identical with the external diameter of metal probe 3, and the tail end of metal probe 3 is fixedly mounted on microstrip circuit 2.The length h0 that metal probe 3 front end exceeds waveguide through hole 5 upper surface is 2.03mm, and certainly, at this, metal probe 3 can adjust for different waveguide dimensions, to adapt to different waveguide scopes.
Rectangular metal block 8 is movably arranged on the output end of waveguide through hole 5, and namely rectangular metal block 8 can at the output end transverse shifting of waveguide through hole 5.Profile, the size in rectangular metal block 8 cross section are all identical with waveguide through hole 5 cross section, and rectangular metal block 8 is wide, height is equal with the wide a of waveguide through hole 5, high b respectively, and the length L1 of rectangular metal block 8 can be then 10mm.Fixing conveniently to rectangular metal block 8, a screwed hole 6 can be opened in the bottom of metallic cavity structure 1, screwed hole 6 is also positioned at the below of rectangular metal block 8 simultaneously, and lock-screw 7 to be arranged on screwed hole 6 and to be against on rectangular metal block 8, is fixed rectangular metal block 8.
When reality uses, when microwave signal to be entered by waveguide through hole 5 and in waveguide through hole 5 during transmission, according to microwave signal distribution of electromagnetic field, after suitable adjustment is positioned over the rectangular metal block 8 position L0 of waveguide through hole 5 end, lock-screw 7 is screwed in the position that screwed hole 6 fixes rectangle metal derby 8, and then form microwave signal transmission short circuit face at waveguide through hole 5 end, realize microwave signal and axially transmit cut-off at waveguide through hole 5.Now, the length h0 of waveguide through hole 5 upper surface is exceeded by the metal probe 3 suitably chosen, realize the feeding of microwave signal to the 50 Ω coaxial circuits be made up of the tetrafluoro cover 10 and metal probe 3 that load metal cylinder passage 4, then be fed to the 50 Ω microstrip circuits be connected with 50 Ω coaxial circuits, realize microwave signal and mutually transmit between rectangular waveguide and microstrip circuit.Thus according to different frequency range microwave signal electric field distribution characteristic, the length h0 overlapping the distance L0 of 10 inner rings and metal probe 3 by regulating rectangular metal block 8 and tetrafluoro and exceed waveguide through hole 5 upper surface, finally realizes different frequency range microwave signal and mutually transmits between rectangular waveguide and microstrip circuit.As shown in Figure 4, by the size described in the present invention, when the distance L0 of tetrafluoro cover inner ring distance rectangular metal block is 2.47mm, electromagnetic field simulation software HFSS is utilized to build the circuit model determined by said structure parameter, analysis circuit S parameter, analysis result as shown in Figure 4.The distance L0 adjusting tetrafluoro cover inner ring distance rectangular metal block is again 2.13mm, and reanalyse circuit S parameter, analysis result as shown in Figure 5.S parameter analysis result Fig. 4 and Fig. 5 before and after contrast circuit structural adjustment, can show that transition circuit provided by the invention can realize the transmission of different frequency range microwave signal between rectangular waveguide and microstrip transmission line.
More than show and describe general principle of the present invention, principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; the just principle of the present invention described in above-described embodiment and specification; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in claimed scope of the present invention.The protection range of application claims is defined by appending claims and equivalent thereof.
Claims (5)
1. one kind has waveguide and the microwave transition circuit of working frequency range adjustable function, comprise metallic cavity structure (1), the upper lateral of metallic cavity structure (1) is provided with cavity (9), the middle part of metallic cavity structure (1) is laterally provided with waveguide through hole (5), both waveguide through hole (5) and cavity (9) parallel, metallic cavity structure (1) is upper be longitudinally provided with metal cylinder passage (4) and metal cylinder passage (4) respectively with waveguide through hole (5) and cavity (9) perpendicular, metal cylinder passage (4) all communicates with waveguide through hole (5) and cavity (9), it is characterized in that:
In described cavity (9), microstrip circuit (2) is installed, the output of microstrip circuit (2) is 50 Ω microstrip transmission lines, the input of microstrip circuit (2) is circular metal land (11), circular metal land (11) is provided with manhole (12), the ground metal layer of microstrip circuit (2) is provided with insulated vias (13), the diameter of insulated vias (13) is greater than manhole (12), and the ground metal layer of microstrip circuit (2) is welded on the upper surface of cavity (9);
Tetrafluoro cover (10) is inserted with in described metal cylinder passage (4), one end of tetrafluoro cover (10) contacts completely with the lower surface of microstrip circuit (2), the other end of tetrafluoro cover (10) contacts completely with the lower surface of waveguide through hole (5), the center of circle of manhole (12), insulated vias (13) and tetrafluoro cover (10) three is corresponding up and down, the front end of metal probe (3) is inserted in tetrafluoro cover (10) by the manhole (12) of circular metal land (11), and the tail end of metal probe (3) is fixedly mounted on microstrip circuit (2); Rectangular metal block (8) is movably arranged on the output end of waveguide through hole (5), and profile, the size in rectangular metal block (8) cross section are all identical with waveguide through hole (5) cross section.
2. a kind of waveguide and microwave transition circuit with working frequency range adjustable function according to claim 1, it is characterized in that: the bottom of described metallic cavity structure (1) has screwed hole (6), screwed hole (6) is positioned at the below of rectangular metal block (8), and lock-screw (7) is arranged on screwed hole (6) and goes up and be against on rectangular metal block (8).
3. a kind of waveguide and microwave transition circuit with working frequency range adjustable function according to claim 1, it is characterized in that: described waveguide through hole (5) is long is 25mm, wide is 10.67mm, height is 4.32mm, the diameter of metal cylinder passage (4) is 2.4mm, the degree of depth of cavity (9) is 8mm, length is 15mm, width is 8mm, the dielectric substrate of microstrip circuit (2) is Rogers5880, the dielectric substrate thickness of microstrip circuit (2) is 0.254mm, 50 Ω microstrip transmission line live widths of microstrip circuit (2) output are 0.76mm, the diameter of circular metal land (11) is 1.5mm, the diameter of insulated vias (13) is 2mm.
4. a kind of waveguide and microwave transition circuit with working frequency range adjustable function according to claim 1, it is characterized in that: the tail end of described metal probe (3) is the long 1mm of being, the wide 0.7mm of being, height are the rectangular configuration of 0.5mm, and the diameter of metal probe (3) front end is 0.7mm.
5. a kind of waveguide and microwave transition circuit with working frequency range adjustable function according to claim 1, it is characterized in that: the internal diameter of described tetrafluoro cover (10) is identical with the external diameter of metal probe (3), the external diameter of tetrafluoro cover (10) is identical with the internal diameter of metal cylinder passage (4).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510698888.5A CN105261815B (en) | 2015-10-23 | 2015-10-23 | A kind of waveguide with working frequency range adjustable function and microwave transition circuit |
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| CN201510698888.5A CN105261815B (en) | 2015-10-23 | 2015-10-23 | A kind of waveguide with working frequency range adjustable function and microwave transition circuit |
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| CN105261815A true CN105261815A (en) | 2016-01-20 |
| CN105261815B CN105261815B (en) | 2018-03-20 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107342459A (en) * | 2017-07-05 | 2017-11-10 | 电子科技大学 | Thin film microstrip antenna transition probe structure |
| CN108955932A (en) * | 2018-07-16 | 2018-12-07 | 北京无线电计量测试研究所 | A kind of waveguide heat-sensitive type survey radiation thermal |
| CN109659694A (en) * | 2019-01-30 | 2019-04-19 | 京信通信技术(广州)有限公司 | Phase shift feeder equipment and antenna for base station |
| CN115000663A (en) * | 2022-07-29 | 2022-09-02 | 四川太赫兹通信有限公司 | Terahertz waveguide structure, middle cavity, circuit structure and electronic equipment |
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| US20150229017A1 (en) * | 2014-02-07 | 2015-08-13 | Fujitsu Limited | High frequency module and fabrication method for high frequency module |
| CN205159481U (en) * | 2015-10-23 | 2016-04-13 | 中国电子科技集团公司第十六研究所 | Waveguide and microwave transition circuit with adjustable function of working frequency band |
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| EP1367668A1 (en) * | 2002-05-30 | 2003-12-03 | Siemens Information and Communication Networks S.p.A. | Broadband microstrip to waveguide transition on a multilayer printed circuit board |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107342459A (en) * | 2017-07-05 | 2017-11-10 | 电子科技大学 | Thin film microstrip antenna transition probe structure |
| CN108955932A (en) * | 2018-07-16 | 2018-12-07 | 北京无线电计量测试研究所 | A kind of waveguide heat-sensitive type survey radiation thermal |
| CN108955932B (en) * | 2018-07-16 | 2020-04-21 | 北京无线电计量测试研究所 | Waveguide thermosensitive bolometer |
| CN109659694A (en) * | 2019-01-30 | 2019-04-19 | 京信通信技术(广州)有限公司 | Phase shift feeder equipment and antenna for base station |
| CN109659694B (en) * | 2019-01-30 | 2023-09-29 | 京信通信技术(广州)有限公司 | Phase-shifting feed device and base station antenna |
| CN115000663A (en) * | 2022-07-29 | 2022-09-02 | 四川太赫兹通信有限公司 | Terahertz waveguide structure, middle cavity, circuit structure and electronic equipment |
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| CN105261815B (en) | 2018-03-20 |
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