CN106549203A - A kind of change-over circuit of coupled microstrip line to rectangular waveguide - Google Patents
A kind of change-over circuit of coupled microstrip line to rectangular waveguide Download PDFInfo
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- CN106549203A CN106549203A CN201610996055.1A CN201610996055A CN106549203A CN 106549203 A CN106549203 A CN 106549203A CN 201610996055 A CN201610996055 A CN 201610996055A CN 106549203 A CN106549203 A CN 106549203A
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- change
- over circuit
- annular groove
- microstrip line
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- 230000008878 coupling Effects 0.000 claims abstract description 23
- 238000010168 coupling process Methods 0.000 claims abstract description 23
- 238000005859 coupling reaction Methods 0.000 claims abstract description 23
- 239000000523 sample Substances 0.000 claims abstract description 18
- 239000002184 metal Substances 0.000 claims abstract description 16
- 229910052751 metal Inorganic materials 0.000 claims abstract description 16
- 239000004020 conductor Substances 0.000 claims abstract description 8
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000003780 insertion Methods 0.000 abstract description 10
- 230000037431 insertion Effects 0.000 abstract description 10
- 238000012545 processing Methods 0.000 abstract description 4
- 239000002356 single layer Substances 0.000 abstract description 4
- 238000012360 testing method Methods 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 7
- 239000000758 substrate Substances 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000001465 metallisation Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000013519 translation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/08—Coupling devices of the waveguide type for linking dissimilar lines or devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/08—Coupling devices of the waveguide type for linking dissimilar lines or devices
- H01P5/10—Coupling devices of the waveguide type for linking dissimilar lines or devices for coupling balanced lines or devices with unbalanced lines or devices
- H01P5/107—Hollow-waveguide/strip-line transitions
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- Waveguide Aerials (AREA)
- Waveguides (AREA)
Abstract
The invention discloses a kind of change-over circuit of coupled microstrip line to rectangular waveguide, the change-over circuit is a coupling probe, the rectangular metal paster for having annular groove is dug centered on the coupling probe, rectangular channel between two conductors of the annular groove and coupled microstrip line is connected, the rectangular metal paster of annular groove periphery is connected with two conductors of coupled microstrip line, rectangular metal paster outside annular groove and annular groove constitutes the flute profile ring and Microstrip Loop of coupling probe, the operating frequency of change-over circuit is determined by the resonant frequency of Microstrip Loop and flute profile ring, coupling probe is extended vertically into.Change-over circuit of the present invention can be realized on monolayer pcb board, with simple structure, it is easy to the advantages of processing.Test result indicate that, the present invention have big bandwidth (26.5 40GHz), low insertion loss (<0.41dB) and big return loss (>15dB), can be applicable in microwave and millimeter wave circuit and system with Waveguide interface.
Description
Technical field
The present invention relates to a kind of change-over circuit, the change-over circuit of more particularly to a kind of coupled microstrip line to rectangular waveguide,
Can be used in the circuit and system of the microwave with Waveguide interface and millimeter wave.
Background technology
In recent years, difference microwave and millimeter wave circuit due to its to interference and environment noise inhibitory action, in communication system
In application it is more and more universal.Coupled microstrip line be in differential system using most planar transmission lines, with small size, it is low into
This advantages of.On the other hand, as rectangular waveguide has high q-factor characteristic, which is widely used in microwave and millimeter wave circuit, uses
To realize the circuits such as various high q-factor transmission lines, wave filter, power splitter and duplexer.In many microwave applications, rectangular waveguide
Can occur in simultaneously in a circuit or system with coupled microstrip line, therefore this is accomplished by one and realizes transmission mould therebetween
The change-over circuit of formula matching.
Change-over circuit of the coupled microstrip line to rectangular waveguide, it is possible to achieve the differential transmission modes in coupled microstrip line are to square
The conversion of the TE10 main moulds in shape waveguide.The bandwidth of transformational structure is an extremely critical performance indications, is realized as wide as possible
Bandwidth be research an important directions.With the bandwidth of operation of current communication system it is more and more wider, existing coupling microstrip
Line cannot meet demand of the communication system to big bandwidth to the change-over circuit of rectangular waveguide, be to limit entering for communication bandwidth
One of bottleneck problem that one step is improved.Therefore it is very urgent to the demand of the change-over circuit of broadband couple device microstrip line to rectangular waveguide.
In existing research report, the rectilinear change-over circuit of coupled microstrip line to rectangular waveguide mainly has three kinds of modes
Realize.Researcher Z.Tong et al. realizes translation function in W-waveband using difference paster antenna.Referring to document [1] Z.Tong,
A.Stelzer,A Vertical transition between rectangular waveguide and coupled
microstrip lines,IEEE Microwave and Wireless Components Letters,22(2012),251-
253。
Researcher T.Yuasa et al. realizes translation function using short-circuit slot line structure.Referring to document [2] T.Yuasa,
T.Oba,Y.Yahara,Y.Morimoto,T.Owade,M.Miyazaki,A millimeter wave wideband
differential line to waveguide transition using short ended slot Line,
European Microwave Conference,Vol.44,Rome,2014,1004-1007。
Researcher M.Ortner et al. is proposed based on multi-layer PCB structure design change-over circuit.Referring to document [3]
M.Ortner,Z.Tong,T.Ostermann,A millimeter-wave wide-band transition from a
differential microstrip to a rectangular waveguide for 60GHz applications,
European Conference on Antennas and Propagation(EUCAP),Rome,2011,1946-1949。
In three of the above method, the change-over circuit that first method is realized, relative bandwidth is 11%, echo in working frequency range
Loss is less than 0.5dB more than 15dB, insertion loss；The change-over circuit that second method is realized, relative bandwidth is 20.2%, work
In frequency range, return loss is more than 10dB, and insertion loss is less than 1.92dB；The change-over circuit that the third method is realized, with a width of
33%, in working frequency range, return loss is more than 15dB, and insertion loss is less than 2.3dB.
The first change-over circuit relative bandwidth too small (11%)；Second change-over circuit relative bandwidth less (20.2%),
And insertion loss larger (1.92dB)；The third change-over circuit relative bandwidth improves, and reaches 33%, but which employs many
Layer PCB construction, circuit are more complicated, and difficulty of processing is big, high cost.And its insertion loss is very big (2.3dB).These three methods are all
There is the limitation of itself.
The content of the invention
It is an object of the invention to provide a kind of change-over circuit based on monolayer PCB circuits, the change-over circuit substantially can be carried
Rise bandwidth of operation and insertion loss is little, easy to process.
The coupled microstrip line based on monolayer PCB circuits (the PCB back sides are metal ground plate) that the present invention is provided is to square wave
The change-over circuit led is a coupling probe, and the rectangular metal paster for having annular groove, the annulus are dug centered on the coupling probe
Rectangular channel between two conductors of shape groove and coupled microstrip line is connected, the rectangular metal paster and coupling microstrip of annular groove periphery
The rectangular metal paster of two conductors connection of line, annular groove and annular groove periphery constitute the flute profile ring of coupling probe and
Microstrip Loop, Microstrip Loop are fully enclosed in the outside of flute profile ring, and the operating frequency of change-over circuit is by Microstrip Loop and the resonance of flute profile ring
Frequency determines that define twin nuclei closely, coupling probe is extended vertically in rectangular waveguide and realizes coupled microstrip line
In difference modess and rectangular waveguide in TE10 main moulds conversion.
If the resonant frequency of Microstrip Loop and flute profile ring is respectively f1 and f2, so change-over circuit just may be simultaneously operated in
Near f1 and f2 two frequency bins, very wide working band can be realized by selecting appropriate f1 and f2, the change-over circuit.Resonance
Frequency f1 and f2 corresponding wavelengths λ 1 and λ 2 are respectively equal to the girth of Microstrip Loop and flute profile ring.Using the relation, can be with preresearch estimates
Resonant frequency f1 and f2 are as follows：
In formula, c represents the light velocity, εe1、εe2The equivalent relative dielectric constant of dielectric-slab is represented,
For given working frequency range, resonant frequency f can be preselected1And f2, and dielectric board material, then by public affairs
Formula (1) and (2) are assured that the size of Microstrip Loop and flute profile ring.The size for adjusting Microstrip Loop and flute profile ring can realize difference
Working band.
The present invention has the effect that：
(1) with very wide bandwidth of operation, whole Ka wave bands (40.6%, 26.5-40GHz) can be covered；
(2) insertion loss is less than 0.41dB；
(3) using one side PCB construction, low cost, it is easy to process；
(4) circuit structure is simple, convenient to carry out Integration Design with other microwaves, millimetre-wave circuit.
Description of the drawings
Fig. 1 is the dimensional structure diagram of the present invention.
Fig. 2 is the top view of the present invention.
Fig. 3 is the pictorial diagram (two change-over circuits connect back-to-back in figure) of the present invention.
Fig. 4 is the object test and simulation comparison figure of S parameter of the present invention.
In Fig. 1：1-rectangular waveguide, 2-metallization, 3-waveguide short of via face, 4-coupled microstrip line, 5-medium base
Piece 6-rectangular metal paster
In Fig. 2：Length L2-the microstrip line of the width L1-Microstrip Loop of the width W2-microstrip line of W1-Microstrip Loop is inserted
Length b-the waveguide for entering the long side of groove width a-waveguide of the groove width S2-microstrip line of length S1-flute profile ring in waveguide is short
The diameter L of metal patch in length D on side-annular grooveshort- coupling probe and the distance in waveguide short face
Below in conjunction with the accompanying drawings and embodiment is described in further detail to the present invention.
Specific embodiment
Embodiment
As shown in figure 1, the coupling microstrip based on monolayer PCB circuits (the PCB back sides are metal ground plate) that the present invention is provided
Line is a coupling probe to the change-over circuit of rectangular waveguide, is realized on dielectric substrate 5, and digging centered on the coupling probe has annulus
The rectangular metal paster 6 of shape groove, the rectangular channel between the annular groove and two conductors of coupled microstrip line 4 are connected, annulus
The rectangular metal paster 6 of shape groove periphery is connected with two conductors of coupled microstrip line 4, the square of annular groove and annular groove periphery
Shape metal patch constitutes the flute profile ring and Microstrip Loop of coupling probe, and Microstrip Loop is fully enclosed in the outside of flute profile ring, conversion electricity
The operating frequency on road depends on the resonant frequency of Microstrip Loop and flute profile ring.The coupled microstrip line 4 and 1 perpendicular shape of rectangular waveguide
State, coupling probe are stretched into from the narrow side of rectangular waveguide 1 and realize in rectangular waveguide 1 coupling, between coupling probe and waveguide short face 3
Distance be Lshort。
In the present embodiment, using 5880 dielectric substrates of RT/Duroid, the substrate relative dielectric constant is dielectric substrate 5
2.2, thickness is 0.127mm.It is machined with row metallization via 2, the metallization via on three sides of dielectric substrate 5 respectively
2 good contacts that dielectric substrate 5 and cavity can be realized in assembling, make both more firmly be combined together, in addition gold
Categoryization via 2 is also prevented from the propagation of waveguide higher modes.
In the present embodiment the width W2 of coupled microstrip line 4 and gap (groove width S2 of microstrip line) be respectively 0.34mm and
0.2mm, can provide the differential impedance of 100 Ω.Rectangular waveguide 1 is standard WR-28 rectangular waveguide, and its cross sectional dimensions is
7.112mm × 3.556mm, cut-off frequency are 21.09GHz.
For test conversion circuit performance, two same change-over circuits are adopted and are connected in back-to-back fashion by the present embodiment
Get up (see Fig. 3), and input and output are Ka frequency range standard rectangular waveguides.Imitated through electromagnetic simulation software Ansoft HFSS
After true optimization, optimal parameter size is obtained, (definition of each physical descriptor in table is shown in that Fig. 2 and accompanying drawing are said shown in table specific as follows
It is bright)：
1 coupling line of table is to the concrete size of the rectilinear change-over circuit of rectangular waveguide
Test result shows：The working band of the back-to-back change-over circuit is 26.5-40GHz (relative bandwidth 40.6%),
Cover whole Ka frequency ranges.Return loss is more than 15dB in this working frequency range, and insertion loss is less than 1.2dB.The insertion loss
Contain the loss of the coupled microstrip line of 25.5mm length, and the loss of two change-over circuits.In the working frequency range, couple micro-
The loss of band wire is about 0.015dB/mm, then its total losses of the coupled microstrip line of 25.5mm length are about 0.383dB, deduct this section
After coupled microstrip line loss, the loss of single change-over circuit is less than 0.41dB.
Table 2 is the comparison of the present embodiment and three kinds of change-over circuits described in background technology.
As can be seen from the table, in three kinds of modes [3rd] plant change-over circuit bandwidth of operation it is most wide, reached 33%, but
Multi-layer PCB circuit is which employs, circuit structure is complicated, and difficulty of processing is big, high cost.The present embodiment realizes most wide work band
Wide (40.6%), while one side PCB construction is adopted, the advantage of little with difficulty of processing of low cost.
The above is only the preferred embodiment of the present invention, but protection scope of the present invention is not limited thereto, any
The protection model in the present invention should be all covered in the transformation and replacement that are carried out based on technical scheme provided by the present invention and inventive concept
In enclosing.
Claims (1)
1. change-over circuit of a kind of coupled microstrip line to rectangular waveguide, it is characterised in that：The change-over circuit is a coupling probe,
Digging centered on the coupling probe has the rectangular metal paster of annular groove, the annular groove and two conductors of coupled microstrip line it
Between rectangular channel connection, annular groove periphery rectangular metal paster connect with two conductors of coupled microstrip line, annular groove
The flute profile ring and Microstrip Loop of coupling probe, the operating frequency of change-over circuit are constituted with the rectangular metal paster of annular groove periphery
Determined by the resonant frequency of Microstrip Loop and flute profile ring, coupling probe extends vertically into the difference realized in rectangular waveguide in coupled microstrip line
The conversion of the TE10 main moulds in merotype and rectangular waveguide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610996055.1A CN106549203B (en) | 2016-11-12 | 2016-11-12 | A kind of conversion circuit of coupled microstrip line to rectangular waveguide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610996055.1A CN106549203B (en) | 2016-11-12 | 2016-11-12 | A kind of conversion circuit of coupled microstrip line to rectangular waveguide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106549203A true CN106549203A (en) | 2017-03-29 |
| CN106549203B CN106549203B (en) | 2018-10-23 |
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| Application Number | Title | Priority Date | Filing Date |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107394330A (en) * | 2017-06-20 | 2017-11-24 | 北京理工大学 | A kind of solid-state circuit waveguide power synthesizer |
| CN113745787A (en) * | 2021-08-23 | 2021-12-03 | 格兰康希微电子系统(上海)有限公司 | Signal converter and microstrip line-waveguide signal conversion device |
| US11387534B2 (en) | 2018-01-19 | 2022-07-12 | Mitsubishi Electric Corporation | Converter and antenna device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060255875A1 (en) * | 2005-04-18 | 2006-11-16 | Furuno Electric Company Limited | Apparatus and method for waveguide to microstrip transition having a reduced scale backshort |
| JP2012147286A (en) * | 2011-01-13 | 2012-08-02 | Toko Inc | Input output connection structure of dielectric waveguide |
-
2016
- 2016-11-12 CN CN201610996055.1A patent/CN106549203B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060255875A1 (en) * | 2005-04-18 | 2006-11-16 | Furuno Electric Company Limited | Apparatus and method for waveguide to microstrip transition having a reduced scale backshort |
| JP2012147286A (en) * | 2011-01-13 | 2012-08-02 | Toko Inc | Input output connection structure of dielectric waveguide |
Non-Patent Citations (1)
| Title |
|---|
| ZIQIANG YANG等: "A Compact and Broadband Differential Microstrip Line to Rectangular Waveguide Transition Using Dipole Antenna", 《JOURNAL OF INFRARED, MILLIMETER, AND TERAHERTZ WAVES》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107394330A (en) * | 2017-06-20 | 2017-11-24 | 北京理工大学 | A kind of solid-state circuit waveguide power synthesizer |
| CN107394330B (en) * | 2017-06-20 | 2019-07-19 | 北京理工大学 | A kind of solid-state circuit-waveguide power synthesizer |
| US11387534B2 (en) | 2018-01-19 | 2022-07-12 | Mitsubishi Electric Corporation | Converter and antenna device |
| CN113745787A (en) * | 2021-08-23 | 2021-12-03 | 格兰康希微电子系统(上海)有限公司 | Signal converter and microstrip line-waveguide signal conversion device |
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| Publication number | Publication date |
|---|---|
| CN106549203B (en) | 2018-10-23 |
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