CN108336468A - The two-sided super slow wave plane microwave delay line of uniconductor phasmon - Google Patents

The two-sided super slow wave plane microwave delay line of uniconductor phasmon Download PDF

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Publication number
CN108336468A
CN108336468A CN201810124889.2A CN201810124889A CN108336468A CN 108336468 A CN108336468 A CN 108336468A CN 201810124889 A CN201810124889 A CN 201810124889A CN 108336468 A CN108336468 A CN 108336468A
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transmission line
transition
conduction band
phasmon
center
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CN108336468B (en
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程崇虎
李常中
刘蕾蕾
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Nanjing Post and Telecommunication University
Nanjing University of Posts and Telecommunications
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Nanjing Post and Telecommunication University
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01PWAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P9/00Delay lines of the waveguide type
    • H01P9/006Meander lines
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01PWAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P9/00Delay lines of the waveguide type
    • H01P9/04Interdigital lines

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Abstract

A kind of super slow wave plane microwave delay line of two-sided uniconductor phasmon include medium substrate (1), medium substrate (1) surface phasmon transmission line (2) and co-planar waveguide to transmission line transition (3);Topside metal layer (10) as bottom-side metal layer (11) shapes and sizes, be symmetrically distributed in medium substrate (1) two sides and by metallization VIA (12) connect;The both ends of surface phasmon transmission line (2) are connected with two co-planar waveguides to transmission line transition (3) respectively, surface phasmon transmission line (2) is the transmission line of double periodic structure, groove (21) array of inside groove (20) array and rectangle that arrange rectangle of surface phasmon transmission line (2);Higher cutoff frequency of the working frequency range of delay line close to surface phasmon transmission line (2).Time delay of the delay line in working band is uniform, mutual coupling is small and size is small;Delay line is planar structure, is easily integrated, low manufacture cost.

Description

The two-sided super slow wave plane microwave delay line of uniconductor phasmon
Technical field
The present invention relates to a kind of microwave delay line, especially a kind of super slow wave plane microwave of two-sided uniconductor phasmon prolongs Slow line.
Background technology
Delay line is a kind of common microwave passive components, is used for phased array and pulse compression system.Delay line can prolong The time that slow signal passes through itself.Due to electromagnetic transmission speed quickly, usually require that the size of delay line is small, so as to small Size provides time delay as long as possible.If signal just needs 300 with light velocity propagation in air, the time delay of 1 microsecond The long delay line of rice.In order to reduce the size of delay line, it usually needs reduce signal delay line spread speed, and postpone Line wants folding up for a section.For microwave signal delay common delay line have lumped parameter inductance capacitance delay line, Supersonic delay line, microwave transmission line delay line and fibre delay line etc..The inductance capacitance delay line working frequency of lumped parameter It is low.The transducer architecture of supersonic delay line is complicated, with system device is easy of integration, working frequency is not high.Fibre delay line has Have the advantages that with wide, low, the anti-interference, good confidentiality of loss, but the structure of fibre delay line is not considerably complicated easy of integration, cost It is higher.Common microwave transmission line delay line has microstrip line delay line, co-planar waveguide delay line and strip line delay line etc., but In these delay lines, the main mould of electromagnetic wave is that TEM moulds or quasi- TEM moulds, the spread speed of signal are still higher so that delay line Size or bigger.And due to being two conductor transmission line, the lateral dimension of transmission line is larger, the mutual coupling of adjacent transmission lines It is relatively strong.When these factors make delay line fold, the distance of adjacent delay line cannot be too close.
Invention content
Technical problem:The purpose of the present invention is to propose to a kind of two-sided super slow wave plane microwave delays of uniconductor phasmon Line, the delay line are uniconductor structures, and signal is propagated with slow wave, and the mutual coupling of the adjacent delay line of folding is small, can be bent, be convenient for It is integrated, low manufacture cost.
Technical solution:A kind of two-sided super slow wave plane microwave delay line of uniconductor phasmon of the present invention includes medium base Plate, the surface phasmon transmission line being arranged on medium substrate and co-planar waveguide are to surface phasmon transmission line transition;It is situated between Matter substrate is topside metal layer on one side, and the another side of medium substrate is bottom-side metal layer, topside metal layer and bottom-side metal layer It is symmetrically distributed in the two sides of medium substrate, topside metal layer is as the shapes and sizes of bottom-side metal layer;Topside metal layer and Bottom-side metal layer constitutes surface phasmon transmission line and co-planar waveguide to surface phasmon transmission line transition;Surface etc. is from sharp The both ends of first transmission line are connected with two co-planar waveguides to surface phasmon transmission line transition respectively, surface phasmon transmission Line be located at topside metal layer top surface conduction band and positioned at bottom-side metal layer bottom surface conduction band by the metallization across medium substrate Hole array connects;Inside groove array, top surface conduction band and bottom are arranged along the center line of top surface conduction band and the center line of bottom surface conduction band The two sides of face conduction band are the groove arrays of rectangle;One end of co-planar waveguide to surface phasmon transmission line transition is delay line Port, co-planar waveguide is located at the end face center conduction band of topside metal layer and bottom center's conduction band shape positioned at bottom-side metal layer As size, end face center conduction band is connect with bottom center's conduction band by the metallization VIA array across medium substrate;It is coplanar Waveguide is with being located at the topside metal of topside metal layer with the bottom-side metal contoured positioned at bottom-side metal layer as size, top surface With bottom-side metal connected by the metallization VIA array across medium substrate to metal;End face center conduction band and bottom center lead Flare with bottom-side metal is gradually opened to topside metal with both sides, and is led far from end face center conduction band and bottom center Band;In co-planar waveguide to the other end of surface phasmon transmission line transition, the end face center conduction band of co-planar waveguide and surface etc. Top surface conduction band from excimer transmission line is connected, and bottom center's conduction band is connected with the bottom surface conduction band of surface phasmon transmission line;Altogether Surface wave leads the transition of surface phasmon transmission line close to the part of surface phasmon transmission line, end face center conduction band and bottom surface There are multiple transition grooves of different depth in the two sides of center conduction band, along the center of end face center conduction band and bottom center's conduction band Line has multiple transition inside grooves of different sizes;Surface phasmon transmission line is the transmission line of the periodic structure of binary cycle, interior Slot, transition inside groove, groove and transition groove are equidistant arrangement, groove center in the spacing and adjacent transition at adjacent internal grooves center Spacing it is the same, the spacing at adjacent grooves center is as the spacing of adjacent transition groove center;Two-sided uniconductor phasmon Higher cutoff frequency of the working frequency range of super slow wave plane microwave delay line close to surface phasmon transmission line.
As the shape of groove, the depth of transition groove is arrived with reducing co-planar waveguide the shape of transition groove from shallow to deep The reflection of surface phasmon transmission line transition, the depth close to the transition groove of surface phasmon transmission line are most deep and close The depth of groove;For the shape of transition inside groove as the shape of inside groove, the size of transition inside groove is ascending to reduce coplanar wave Lead the reflection of surface phasmon transmission line transition, it is maximum close to the size of the transition inside groove of surface phasmon transmission line and Close to the size of inside groove.
The super slow wave plane microwave of two-sided uniconductor phasmon can be changed by changing the length of surface phasmon transmission line The time delay of delay line;Change the spacing, the depth of groove, adjacent internal grooves center at surface phasmon transmission line adjacent grooves center Spacing, the size of inside groove can change the working frequency of the super slow wave plane microwave delay line of two-sided uniconductor phasmon.
The length of co-planar waveguide to surface phasmon transmission line transition is more than five operation wavelengths, the quantity of transition groove More than 20, the quantity of transition inside groove is more than ten, to reduce reflection.
It adjusts the size of inside groove, adjust the ratio of the spacing at adjacent internal grooves center and the spacing at two adjacent grooves centers, So that time delay of the two-sided super slow wave plane microwave delay line of uniconductor phasmon in working band is as equal as possible.
The spacing of adjacent metal via is not more than 1/8th wavelength, to ensure topside metal layer and bottom-side metal layer Effectively connection.
Surface phasmon transmission line is a kind of periodic slow wave transmission line, and is band-pass transmissions line.Electromagnetism wave frequency For rate closer to the higher cutoff frequency of surface phasmon transmission line, the speed propagated is slower, the delay time of unit length It is longer.The working frequency range of the two-sided super slow wave plane microwave delay line of uniconductor phasmon is close to surface phasmon transmission line Higher cutoff frequency, the size of delay line can be allow to be substantially reduced in this way.
Surface phasmon transmission line is a kind of slow wave transmission line of binary cycle, and the length in one of them period is exactly adjacent The spacing of interior groove center, the length in another period are exactly the spacing at adjacent grooves center.Periodic inside groove array can be adjusted The shape of surface phasmon dispersion on transmission lines curve is saved, inside groove is bigger, and the degree of adjusting is bigger, therefore can adjust inside groove Size and adjust two periods relative size can adjust surface phasmon transmission line dispersion curve shape, So that the time delay of delay line is as consistent as possible in working frequency range.
Surface phasmon transmission line is a kind of uniconductor surface wave transmission line, and the electromagnetic wave of transmission is by constraint tightly In the neighbour of surface phasmon transmission line, therefore even if close proximity, between adjacent two surface phasmon transmission lines Mutual coupling very little.In this way surface phasmon transmission line can transmission lines more other than microstrip line etc. it is closer bending arrangement, with Reduce the volume of the super slow wave plane microwave delay line of two-sided uniconductor phasmon.
Surface phasmon transmission line is a kind of uniconductor surface wave transmission line, and the thickness of impedance and medium substrate is basic It is unrelated, therefore very thin medium substrate may be used, it can not only reduce the volume, weight and cost of delay line, but also make Flexibility is strong.
The two-sided super slow wave plane microwave delay line of uniconductor phasmon is planar structure, is easy to and the other components of system It is integrated, realize miniaturization.
Advantageous effect:The advantageous effect of the super slow wave plane microwave delay line of two-sided uniconductor phasmon of the present invention is, The delay line is the surface phasmon transmission line structure of uniconductor, and signal is not only tightly constrained in conductor neighbour so that folding The mutual coupling of folded adjacent delay line is small, delay line can fold tightlier to reduce the size of delay line.And delay line works In the frequency close to upper cut-off region of surface phasmon transmission line, electromagnetic wave propagation speed is very low, further reduces and prolongs The size of slow line;Delay line is double periodic structure, and the time delay in working band is uniform;And the delay line is planar junction Structure, can be integrated with other components in system, and the making of planar printed circuit board technique may be used, at low cost.
Description of the drawings
Fig. 1 is the super slow wave plane microwave delay line top surface structure schematic diagram of two-sided uniconductor phasmon;
Fig. 2 is the super slow wave plane microwave delay line bottom surface structure schematic diagram of two-sided uniconductor phasmon;
Fig. 3 is the super slow wave plane microwave delay line schematic diagram of two-sided uniconductor phasmon of bending arrangement;
Have in figure:Medium substrate 1, surface phasmon transmission line 2, co-planar waveguide to surface phasmon transmission line transition 3, topside metal layer 10, bottom-side metal layer 11, metallization VIA 12, inside groove 20, groove 21, port 31, transition groove 34, transition Inside groove 35, top surface conduction band 200, bottom surface conduction band 201, end face center conduction band 300, bottom center's conduction band 301, topside metal 302 With bottom-side metal 303.
Specific implementation mode
The invention will be further described with reference to the accompanying drawings and examples.
Embodiment of the present invention is:A kind of super slow wave plane microwave delay line packet of two-sided uniconductor phasmon Include medium substrate 1, the surface phasmon transmission line 2 that is arranged on medium substrate 1 and co-planar waveguide are passed to surface phasmon Defeated line transition 3;Medium substrate 1 is topside metal layer 10 on one side, and the another side of medium substrate 1 is bottom-side metal layer 11, top surface Metal layer 10 is symmetrically distributed in the two sides of medium substrate 1, topside metal layer 10 and bottom-side metal layer 11 with bottom-side metal layer 11 Shapes and sizes are the same;Topside metal layer 10 and bottom-side metal layer 11 constitute surface phasmon transmission line 2 and co-planar waveguide arrives Surface phasmon transmission line transition 3;The both ends of surface phasmon transmission line 2 respectively with two co-planar waveguides to surface etc. from Excimer transmission line transition 3 is connected, and surface phasmon transmission line 2 is located at the top surface conduction band 200 of topside metal layer 10 and is located at bottom The bottom surface conduction band 201 of face metal layer 11 is by 12 array of the metallization VIA connection across medium substrate 1;Along top surface conduction band 200 Center line and the center line of bottom surface conduction band 201 arrange 20 array of inside groove, the both sides of top surface conduction band 200 and bottom surface conduction band 201 While being 21 array of groove of rectangle;One end of co-planar waveguide to surface phasmon transmission line transition 3 is the port 31 of delay line, Co-planar waveguide is located at the end face center conduction band 300 of topside metal layer 10 and bottom center's conduction band 301 positioned at bottom-side metal layer 11 Shapes and sizes are the same, and end face center conduction band 300 is with bottom center's conduction band 301 by the metallization VIA 12 across medium substrate 1 Array connects;Co-planar waveguide with being located at the topside metal of topside metal layer 10 302 and positioned at bottom-side metal layer 11 bottom-side metal 303 shapes and sizes of ground are the same, topside metal 302 and bottom-side metal 303 by the metallization VIA 12 across medium substrate 1 Array connects;The topside metal of 301 both sides of end face center conduction band 300 and bottom center's conduction band 302 and bottom-side metal 303 by Flare is gradually opened, and far from end face center conduction band 300 and bottom center's conduction band 301;In co-planar waveguide to surface etc. from sharp The other end of first transmission line transition 3, the end face center conduction band 300 of co-planar waveguide and the top surface of surface phasmon transmission line 2 are led Band 200 is connected, and bottom center's conduction band 301 is connected with the bottom surface conduction band 201 of surface phasmon transmission line 2;Co-planar waveguide is to table Face phasmon transmission line transition 3 is close to the part of surface phasmon transmission line 2, end face center conduction band 300 and bottom center There are multiple transition grooves 34 of different depth in the two sides of conduction band 301, along end face center conduction band 300 and bottom center's conduction band 301 center line has multiple transition inside grooves 35 of different sizes;Surface phasmon transmission line 2 is the periodic structure of binary cycle Transmission line, inside groove 20, transition inside groove 35, groove 21 and transition groove 34 are equidistant arrangement, 20 center of adjacent internal grooves Spacing is as the spacing at 35 center of adjacent transition inside groove, spacing and 34 center of adjacent transition groove at 21 center of adjacent grooves Spacing is the same;The working frequency range of the two-sided super slow wave plane microwave delay line of uniconductor phasmon is transmitted close to surface phasmon The higher cutoff frequency of line 2.
For the shape of transition groove 34 as the shape of groove 21, the depth of transition groove 34 is coplanar to reduce from shallow to deep Waveguide to surface phasmon transmission line transition 3 reflection, close to the depth of the transition groove 34 of surface phasmon transmission line 2 It is most deep and close to the depth of groove 21;The shape of transition inside groove 35 as the shape of inside groove 20, the size of transition inside groove 35 by It is small to greatly to reduce reflection of the co-planar waveguide to surface phasmon transmission line transition 3, close to surface phasmon transmission line 2 The size of transition inside groove 35 is maximum and close to the size of inside groove 20.
The super slow wave plane microwave of two-sided uniconductor phasmon can be changed by changing the length of surface phasmon transmission line 2 The time delay of delay line;Change the spacing at 21 center of surface phasmon transmission line 2 adjacent grooves, the depth of groove 21, it is adjacent in The spacing at 20 center of slot, the size of inside groove 20 can change the work of the super slow wave plane microwave delay line of two-sided uniconductor phasmon Working frequency.
The length of co-planar waveguide to surface phasmon transmission line transition 3 is more than five operation wavelengths, transition groove 34 Quantity is more than 20, and the quantity of transition inside groove 35 is more than ten, to reduce reflection.
Adjust the size of inside groove 20, spacing and the spacing at two 21 centers of adjacent grooves at 20 center of adjusting adjacent internal grooves Ratio so that time delay of the two-sided super slow wave plane microwave delay line of uniconductor phasmon in working band is as equal as possible.
The spacing of adjacent metal via 12 is not more than 1/8th wavelength, to ensure topside metal layer 10 and bottom-side metal Effective connection of layer 11.
Surface phasmon transmission line 2 is a kind of periodic slow wave transmission line, and is band-pass transmissions line.Electromagnetism wave frequency For rate closer to the higher cutoff frequency of surface phasmon transmission line 2, the speed propagated is slower, the delay time of unit length It is longer.The working frequency range of the two-sided super slow wave plane microwave delay line of uniconductor phasmon is close to surface phasmon transmission line 2 higher cutoff frequency can allow the size of delay line to be substantially reduced in this way.
Surface phasmon transmission line 2 is a kind of slow wave transmission line of binary cycle, and the length in one of them period is exactly phase The spacing at 20 center of adjacent inside groove, the length in another period are exactly the spacing at 21 center of adjacent grooves.Periodic 20 gusts of inside groove Row can adjust the shape of 2 dispersion curve of surface phasmon transmission line, and inside groove 20 is bigger, and the degree of adjusting is bigger, therefore The size of inside groove 20, which can be adjusted, and adjust the relative size in two periods can adjust surface phasmon transmission line 2 The shape of dispersion curve so that the time delay of delay line is as consistent as possible in working frequency range.
Fig. 3 is the super slow wave plane microwave delay line schematic diagram of two-sided uniconductor phasmon of bending arrangement.Surface etc. from Excimer transmission line 2 is a kind of uniconductor surface wave transmission line, transmission electromagnetic wave by tightly constrain in surface phasmon The neighbour of transmission line 2, therefore even if close proximity, the mutual coupling very little between adjacent two surface phasmon transmission lines 2.This Sample surface phasmon transmission line 2 can the closer bending arrangement of transmission lines more other than microstrip line etc., two-sided singly led with reducing The volume of the super slow wave plane microwave delay line of body phasmon.
Surface phasmon transmission line 2 is a kind of uniconductor surface wave transmission line, the thickness base of impedance and medium substrate 1 This is unrelated, therefore very thin medium substrate 1 may be used, and can not only reduce the volume, weight and cost of delay line, but also The flexibility used is strong.
The two-sided super slow wave plane microwave delay line of uniconductor phasmon is planar structure, is easy to and the other components of system It is integrated, realize miniaturization.
In technique, kinds of processes realization may be used in the two-sided super slow wave plane microwave delay line of uniconductor phasmon, Both common printed circuit board (PCB) technique may be used, can also use low-temperature co-fired ceramics (LTCC) technique or CMOS, The integrated circuit technologies such as Si substrates are realized.
According to the above, the present invention can be realized.

Claims (6)

1. a kind of super slow wave plane microwave delay line of two-sided uniconductor phasmon, it is characterised in that the delay line includes medium base Plate(1), be arranged in medium substrate(1)On surface phasmon transmission line(2)And co-planar waveguide is transmitted to surface phasmon Line transition(3);Medium substrate(1)Be topside metal layer on one side(10), medium substrate(1)Another side be bottom-side metal layer (11), topside metal layer(10)With bottom-side metal layer(11)It is symmetrically distributed in medium substrate(1)Two sides, topside metal layer(10) With bottom-side metal layer(11)Shapes and sizes it is the same;Topside metal layer(10)With bottom-side metal layer(11)Surface etc. is constituted from sharp First transmission line(2)With co-planar waveguide to surface phasmon transmission line transition(3);Surface phasmon transmission line(2)Both ends Respectively with two co-planar waveguides to surface phasmon transmission line transition(3)It is connected, surface phasmon transmission line(2)Positioned at top Face metal layer(10)Top surface conduction band(200)With positioned at bottom-side metal layer(11)Bottom surface conduction band(201)By passing through medium substrate (1)Metallization VIA(12)Array connects;Along top surface conduction band(200)Center line and bottom surface conduction band(201)Center line Arrange inside groove(20)Array, top surface conduction band(200)With bottom surface conduction band(201)Two sides be rectangle groove(21)Array; Co-planar waveguide is to surface phasmon transmission line transition(3)One end be delay line port(31), co-planar waveguide is located at top surface Metal layer(10)End face center conduction band(300)With positioned at bottom-side metal layer(11)Bottom center's conduction band(301)Shape and big It is small the same, end face center conduction band(300)With bottom center's conduction band(301)By passing through medium substrate(1)Metallization VIA(12) Array connects;Co-planar waveguide is located at topside metal layer(10)Topside metal(302)With positioned at bottom-side metal layer(11)Bottom Face metal(303)Shapes and sizes are the same, topside metal(302)With bottom-side metal(303)By passing through medium substrate(1) Metallization VIA(12)Array connects;End face center conduction band(300)With bottom center's conduction band(301)The topside metal of both sides (302)With bottom-side metal(303)Flare is gradually opened, and far from end face center conduction band(300)With bottom center's conduction band (301);In co-planar waveguide to surface phasmon transmission line transition(3)The other end, the end face center conduction band of co-planar waveguide (300)With surface phasmon transmission line(2)Top surface conduction band(200)It is connected, bottom center's conduction band(301)With surface etc. from swashing First transmission line(2)Bottom surface conduction band(201)It is connected;Co-planar waveguide is to surface phasmon transmission line transition(3)By near surface etc. From excimer transmission line(2)Part, end face center conduction band(300)With bottom center's conduction band(301)Two sides have different depth Multiple transition grooves(34), along end face center conduction band(300)With bottom center's conduction band(301)Center line have it is of different sizes Multiple transition inside grooves(35);Surface phasmon transmission line(2)It is the transmission line of the periodic structure of binary cycle, inside groove (20), transition inside groove(35), groove(21)And transition groove(34)It is equidistant arrangement, adjacent internal grooves(20)The spacing at center With adjacent transition inside groove(35)The spacing at center is the same, adjacent grooves(21)The spacing at center and adjacent transition groove(34)Center Spacing it is the same;The working frequency range of the two-sided super slow wave plane microwave delay line of uniconductor phasmon is passed close to surface phasmon Defeated line(2)Higher cutoff frequency.
2. a kind of two-sided super slow wave plane microwave delay line of uniconductor phasmon according to claim 1, feature exist In the transition groove(34)Shape and groove(21)Shape it is the same, transition groove(34)Depth from shallow to deep with reduce Co-planar waveguide is to surface phasmon transmission line transition(3)Reflection, close to surface phasmon transmission line(2)Transition groove (34)Depth it is most deep and close to groove(21)Depth;Transition inside groove(35)Shape and inside groove(20)Shape it is the same, mistake Cross inside groove(35)Size it is ascending to reduce co-planar waveguide to surface phasmon transmission line transition(3)Reflection, it is close Surface phasmon transmission line(2)Transition inside groove(35)Size it is maximum and close to inside groove(20)Size.
3. a kind of two-sided super slow wave plane microwave delay line of uniconductor phasmon according to claim 1, feature exist In the surface phasmon transmission line(2), changing its length, can to change the super slow wave plane of two-sided uniconductor phasmon micro- The time delay of wave delay line;Change 2 adjacent grooves of surface phasmon transmission line(21)The spacing at center, groove(21)Depth, Adjacent internal grooves(20)The spacing at center, inside groove(20)Size can change the super slow wave plane microwave of two-sided uniconductor phasmon The working frequency of delay line.
4. a kind of two-sided super slow wave plane microwave delay line of uniconductor phasmon according to claim 1, feature exist In the surface phasmon transmission line transition(3), co-planar waveguide to surface phasmon transmission line transition(3)Length be more than Five operation wavelengths, transition groove(34)Quantity be more than 20, transition inside groove(35)Quantity be more than ten, it is anti-to reduce It penetrates.
5. a kind of two-sided super slow wave plane microwave delay line of uniconductor phasmon according to claim 1, feature exist In the inside groove(20), adjust inside groove(20)Size, adjust adjacent internal grooves(20)The spacing at center and two adjacent grooves (21)The ratio of the spacing at center so that the two-sided super slow wave plane microwave delay line of uniconductor phasmon is in working band Time delay is as equal as possible.
6. a kind of two-sided super slow wave plane microwave delay line of uniconductor phasmon according to claim 1, feature exist In the metallization VIA(12), adjacent metal via(12)Spacing be not more than 1/8th wavelength, to ensure top surface Metal layer(10)With bottom-side metal layer(11)Effective connection.
CN201810124889.2A 2018-02-07 2018-02-07 The two-sided super slow wave plane microwave delay line of uniconductor phasmon Active CN108336468B (en)

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