CN201663220U - Delay line of substrate integrated waveguide structure - Google Patents

Abstract

The utility model discloses a delay line of a substrate integrated waveguide structure which belongs to the technical field of microwave millimeter wave devices. The delay line comprises a rectangular medium substrate (4), a metal layer (3) and a first type of metallization through holes (2); the first type of metallization through holes (2) are distributed on both sides of the rectangular medium substrate (4) side by side in parallel to form the substrate integrated waveguide structure; a plurality of rows of second type of vertical distributed metallization through holes (1) are arranged between two rows of first type of metallization through holes (2); the distances among two adjacent rows of second type of metallization through holes (1) are equal and the two adjacent rows of second type of metallization through holes (1) are distributed in an interlacing way. Based on the substrate integrated waveguide structure, a substrate integrated waveguide filter structure is realized by the addition of the second type of metallization through holes. Different delay performances are realized by changing the relevant size parameters of the second type of metallization through holes. The device is characterized by smaller wastage, stronger anti-interference performance, small volume, easy processing and low cost.

Description

A kind of substrate integrated wave guide structure delay line

Technical field

The utility model belongs to microwave and millimeter wave device technology field, relates to microwave and millimeter wave waveguiding structure and phase delay device.

Background technology

Be used for the signal of telecommunication is postponed element or the device of a period of time and be called delay line, this class component is widely used in fields such as accurate oscilloscope, color TV, electronic computer, industrial process control, modern radar system.The delay line of Ying Yonging is the coaxial cable delay line the earliest, but its volume is big, Heavy Weight, and it is very big to insert loss when time of delay is longer, so application is restricted.Supersonic delay line does not need the smooth both-end transducer of broadband response, and the complicated difficulty of making of this transducer architecture, and is easy of integration with system device, operating frequency is not high; The fibre delay line complex structure is not easy of integration, and cost is also higher.Substrate integration wave-guide is a kind of novel microwave millimeter wave-guiding wave structure that proposes in recent years, it makes and comprises that the complete circuit of planar circuit, joint and rectangular waveguide can be integrated in the printed circuit board (PCB) with plane form that it had both had the easy processing of little band, advantage easy of integration; The advantage that has rectangular metal waveguide low-loss, high Q value again.Because modern PCB technology is very ripe, machining accuracy is also higher, so on higher frequency range, can realize the processing of substrate integration wave-guide perception metal throuth hole fully, its processing cost is lower simultaneously, the volume of product is little, integrated level is higher, helps the large-scale production and the application of this delay line.

Summary of the invention

The utility model provides a kind of substrate integrated wave guide structure delay line, and this delay line has that volume is little, loss is low, the characteristics of strong interference immunity, and is easy to processing, with low cost.

A kind of substrate integrated wave guide structure delay line as shown in Figure 1, comprises rectangle dielectric substrate 4, the metal level 3 attached to dielectric substrate 4 two sides, first kind plated-through hole 2 and the second metalloid through hole 1.Identical and the parallel side by side both sides that are distributed in rectangle dielectric substrate 4 of the shape and size of described first kind plated-through hole 2 connect together the metal level 3 on rectangle dielectric substrate 4 two sides.Two ranked first metalloid through hole 2 is equivalent to two metal electricity walls, makes two to ranked first the metal level 3 common rectangular waveguide that a dielectric substrate 4 is filled, the i.e. substrate integration wave-guides of forming on metalloid through hole 2 and rectangle dielectric substrate 4 two sides.

Distance between adjacent two first kind plated-through holes 2 of the same side is 1.5～2 times of first kind plated-through hole 2 self diameter, and first kind plated-through hole 2 self diameter is 1/18th to 1/20th of a delay line operating frequency corresponding wavelength.

Two ranked first and have some row between the metalloid through hole 2 perpendicular to the two second metalloid through holes 1 that ranked first metalloid through hole 2; The shape and size of all second metalloid through holes 1 are identical, and the quantity of each row second metalloid through hole 1 is also identical; Distance between adjacent two row, the second metalloid through hole 1 is identical, and the shape that is interspersed, and promptly row are near wherein one ranked first metalloid through hole 2, and another row are near wherein another ranked first metalloid through hole 2.Every row second metalloid through hole 1 is equivalent to the sheet metal that inserts substrate integration wave-guide.

In substrate integrated wave guide structure, two ranked first and determined the operating frequency range that substrate integration wave-guide is guided wave structure formed apart from w between the metalloid through hole 2:

$f>{\mathrm{<figure-callout\; id="10"\; label="f\; TE"\; filenames="HSA00000079719300012.png"\; state="\{\{state\}\}">f</figure-callout>}}_{{\mathrm{TE}}_{}}=\frac{c_0}{2w_{\mathrm{eff}}\sqrt{{\mathrm{\&epsiv;}}_r}}\left(\mathrm{Hz}\right)---\left(1\right)$

$w_{\mathrm{eff}}=w-1.08\frac{D^2}{b}+0.1\frac{D^2}{w}---\left(2\right)$

Wherein f be this waveguide operating frequency,

Be cut-off frequency, the ε of this waveguide _rBe dielectric constant, the c of medium ₀Be that the light velocity, w two ranked first the distance between the metalloid through hole 2, w _EffBe the width that the substrate integration wave-guide equivalence becomes conventional waveguide, D is the aperture of first kind plated-through hole 2, and b is the hole heart distance between adjacent two first kind plated-through holes 2.

The utility model adopts the cross-linked second metalloid through hole, 1 structure to realize the substrate integral wave guide filter structure on the substrate integrated wave guide structure basis.Part between cross-linked adjacent three row, the second metalloid through hole 1 forms a resonant cavity, plays filter action.Microwave signal can produce the group delay of certain hour by filter.Phase velocity by transmission line (L and C are respectively the inductance and the electric capacity of unit length) formula increases unit length internal inductance or electric capacity and all can reduce phase velocity as can be known, thereby reaches slow wave (promptly postponing) effect.And each row second metalloid through hole 1 can be regarded waveguide H face metallic membrane as, this metallic membrane can equivalence be an inductance in parallel, therefore the spacing that changes aperture, quantity and adjacent two row, the second metalloid through hole 1 of each row second metalloid through hole 1 just can obtain different inductance value, thereby obtains the delay line device of different delay.

The substrate integrated wave guide structure delay line that the utility model provides owing to adopt substrate integrated wave guide structure, therefore has less consumption and stronger interference free performance, have simultaneously volume little, be easy to process, characteristics with low cost; Simultaneously, the utility model can link to each other with other microwave circuit by the SMA head, have that the circuit assembling is simple, reliability is high, and other planar circuits be easier to integrated characteristics.The utility model can be used for microwave and millimeter wave communication, radar, navigational guidance, radio and television and test macro thereof.

Description of drawings

The structural representation of the substrate integrated wave guide structure delay line that Fig. 1 provides for the utility model.

The operating frequency of the substrate integrated wave guide structure delay line of the different progression that Fig. 2 provides for the utility model and time of delay concern simulation curve.

Embodiment

A kind of substrate integrated wave guide structure delay line as shown in Figure 1, comprises rectangle dielectric substrate 4, the metal level 3 attached to dielectric substrate 4 two sides, first kind plated-through hole 2 and the second metalloid through hole 1.Identical and the parallel side by side both sides that are distributed in rectangle dielectric substrate 4 of the shape and size of described first kind plated-through hole 2 connect together the metal level 3 on rectangle dielectric substrate 4 two sides.Two ranked first metalloid through hole 2 is equivalent to two metal electricity walls, makes two to ranked first the metal level 3 common rectangular waveguide that a dielectric substrate 4 is filled, the i.e. substrate integration wave-guides of forming on metalloid through hole 2 and rectangle dielectric substrate 4 two sides.

Distance between adjacent two first kind plated-through holes 2 of the same side is 1.5～2 times of first kind plated-through hole 2 self diameter, and first kind plated-through hole 2 self diameter is 1/18th to 1/20th of a delay line operating frequency corresponding wavelength.

Two ranked first and have some row between the metalloid through hole 2 perpendicular to the two second metalloid through holes 1 that ranked first metalloid through hole 2; The shape and size of all second metalloid through holes 1 are identical, and the quantity of each row second metalloid through hole 1 is also identical; Distance between adjacent two row, the second metalloid through hole 1 is identical, and the shape that is interspersed, and promptly row are near wherein one ranked first metalloid through hole 2, and another row are near wherein another ranked first metalloid through hole 2.Every row second metalloid through hole 1 is equivalent to the sheet metal that inserts substrate integration wave-guide.

For the ease of being connected of substrate integration wave-guide delay line and other circuit, the convenience of while in order to test, the substrate integration wave-guide delay line input that also can provide at the utility model, impedance matching structure of output design are to realize 50 ohm characteristic impedance input and output.Described impedance matching structure can adopt little band asymptote or co-planar waveguide connecting line to realize.

Determining under the prerequisite of relevant parameter that Fig. 2 has provided the simulation curve that concerns of the operating frequency of integrated wave guide structure delay line of the different progression that the utility model provides and time of delay.Wherein relevant parameter is: the aperture of first kind plated-through hole 2 is 0.4mm, and the aperture of the second metalloid through hole 1 is 0.8mm, and the spacing between adjacent two row, the second metalloid through hole 1 is 1.75mm, and the dielectric constant of dielectric substrate 4 is 10.2.Wherein curve a is corresponding to 3 grades of integrated wave guide structure delay lines, curve b is corresponding to 4 grades of integrated wave guide structure delay lines, curve c is corresponding to 9 grades of integrated wave guide structure delay lines, and curve d is corresponding to 14 grades of integrated wave guide structure delay lines, and curve e is corresponding to 19 grades of integrated wave guide structure delay lines.The group delay value gets progression with delay line and increases progressively (the one-level delay line is defined as by two row, the second metalloid through hole is staggered respectively up and down and forms) as seen from Figure 2.

Claims (4)

1. substrate integrated wave guide structure delay line comprises rectangle dielectric substrate (4), attached to the metal level (3) and the first kind plated-through hole (2) on dielectric substrate (4) two sides; Identical and the parallel side by side both sides that are distributed in rectangle dielectric substrate (4) of the shape and size of described first kind plated-through hole (2) connect together the metal level (3) on rectangle dielectric substrate (4) two sides; Distance between adjacent two first kind plated-through holes (2) of the same side is 1.5～2 times of first kind plated-through hole (2) self diameter, and first kind plated-through hole (2) self diameter is 1/18th to 1/20th of a delay line operating frequency corresponding wavelength;

It is characterized in that this substrate integrated wave guide structure delay line also comprises the second metalloid through hole (1); Two ranked first and have some row between the metalloid through hole (2) perpendicular to the two second metalloid through holes (1) that ranked first metalloid through hole (2); The shape and size of all second metalloid through holes (1) are identical, and the quantity of each row second metalloid through hole (1) is also identical; Distance between adjacent two row, the second metalloid through hole (1) is identical, and the shape that is interspersed, and promptly row are near wherein one ranked first metalloid through hole (2), and another row are near wherein another ranked first metalloid through hole (2).

2. substrate integrated wave guide structure delay line according to claim 1 is characterized in that, input, the output of described substrate integration wave-guide delay line have impedance matching structure, to realize 50 ohm characteristic impedance input and output.

3. substrate integrated wave guide structure delay line according to claim 2 is characterized in that, described impedance matching structure is little band asymptote.

4. substrate integrated wave guide structure delay line according to claim 2 is characterized in that, described impedance matching structure is the co-planar waveguide connecting line.

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