CN106229596A - A kind of metal waveguide chip integrated waveguide power distributor - Google Patents

Abstract

The invention belongs to the design of millimere-wave band power splitter and the technical field manufactured, a kind of novel metal waveguide substrate integrated waveguide power splitter, including substrate integration wave-guide and metal straight waveguide；Bottom copper clad layers that described substrate integration wave-guide includes stacking gradually from the bottom up, dielectric layer, top layer copper clad layers, and run through two row's plated through-holes of bottom copper clad layers, dielectric layer and top layer copper clad layers；It is characterized in that, it is further opened with in the bottom copper clad layers of described substrate integration wave-guide feeding mouth, described feed mouth is positioned at substrate integration wave-guide center and size and keeps consistent with metal straight waveguide mouth, and described metal straight waveguide is vertically fed to substrate integration wave-guide by feed mouth.The present invention from a structural point, simplifies feed structure, is reduced in size, it is simple to the system integration and miniaturization；For from electrical property, improve feed efficiency, reduce loss；Meanwhile, the homophase/anti-phase output of output port can be designed according to actual needs.

Description

A kind of metal waveguide-chip integrated waveguide power distributor

Technical field

The invention belongs to the design of millimere-wave band power splitter and the technical field manufactured, relate to the integrated ripple of metal waveguide-substrate Lead Compact power divider.

Background technology

Power splitter is a kind of a road input signal energy to be divided into two-way or the device of the equal or unequal energy of multiple-channel output Part.

The component compact that the demand for development of wireless technology is used.It is low-loss that substrate integration wave-guide is that a class has Novel transmission line, has been obtained for extensively applying, and in some occasion, such as antenna feed structure, needs integral substrate integrated waveguide Power splitter and metal waveguide-substrate integration wave-guide transition, with compressor circuit entire area and improve circuit stability.Existing scheme Being first to realize chip integrated waveguide power distributor, it includes an input port and multiple output port, then by metal waveguide Vertical feed is to the input port of substrate integration wave-guide, as shown in Figure 1.This kind of scheme main body includes two parts, and waveguide is to substrate Integrated waveguide transition structure I and T-shaped merit separation structure II, first need to pass through from metal waveguide to substrate integration wave-guide transition structure The position in regulation feedback mouth 1 surrounding metal hole 2 makes metal waveguide and substrate integration wave-guide form good coupling, is then passed through certain The T-shaped merit separation structure of one-to-two is designed and it needs to the position of regulation grommet 4 realizes the good of port after the transmission line 3 of length Coupling.Owing to signal is through twice matched design and one section of transmission line, can increase feeder loss, reduce bandwidth of operation, structure is not Enough compact, the highest this impact of frequency is the most notable.

Additionally, the branch road of traditional T-shaped power divider structure is generally designed symmetry, thus the phase of output port, And in some circuit, need anti-phase output, such as differential feed structure, and this feed structure often requires that phase equalization degree It is better, if the power splitter for traditional structure to realize anti-phase being accomplished by plus phase-shifting unit, the so chi of meeting increasing circuit Very little and the introducing of phase shifter can reduce bandwidth and increase loss.

Summary of the invention

The defect that present invention aims to prior art provides a kind of novel metal waveguide-chip integrated wave guide power Divide device, for reducing the size of the power splitter of metal waveguide-substrate integration wave-guide transition, reduce loss, extension work strip simultaneously Wide；It addition, the present invention can under conditions of not increasing the phase shifter as required Reasonable adjustment structure thus realize output port Homophase/anti-phase output.

For achieving the above object, the technical solution used in the present invention is:

A kind of metal waveguide-chip integrated waveguide power distributor, including substrate integration wave-guide and metal straight waveguide；Described substrate Bottom copper clad layers that integrated waveguide includes stacking gradually from the bottom up, dielectric layer, top layer copper clad layers, and run through bottom and cover copper Layer, dielectric layer and two row's plated through-holes of top layer copper clad layers；It is characterized in that, in the bottom copper clad layers of described substrate integration wave-guide Being further opened with feeding mouth, described feed mouth is positioned at substrate integration wave-guide center and size and keeps consistent with metal straight waveguide mouth, institute State metal straight waveguide vertically to be fed to substrate integration wave-guide by feed mouth.

Further, described substrate integration wave-guide is additionally provided with and the standard metal waveguide flange position one for feed The screw caused, for fixing substrate integration wave-guide and metal straight waveguide by screw.

In the present invention, the spacing of described two row's plated through-holes need to meet the condition of main mould transmission, if its distance is d, then d should Meet relational expression:

$\frac{{\mathrm{\&lambda;}}_g}{2}<d<{\mathrm{\&lambda;}}_g$

Wherein, λ_gFor the waveguide wavelength in metal waveguide, it is calculated by following formula:

${\mathrm{\&lambda;}}_g=\frac{{\mathrm{\&lambda;}}_{\mathrm{\&epsiv;}}}{\sqrt{1-{\left(\frac{{\mathrm{\&lambda;}}_{\mathrm{\&epsiv;}}}{2d}\right)}^2}}$

Wherein, λ_εFor the wavelength in medium, it and the wavelength X in vacuum₀Relational expression be:

${\mathrm{\&lambda;}}_{\mathrm{\&epsiv;}}=\frac{{\mathrm{\&lambda;}}_0}{\sqrt{{\mathrm{\&epsiv;}}_r}}$

Wherein, ε_rFor the relative dielectric constant of medium, λ₀=c/f, c=3 × 10⁸M/s be the light velocity, f be that (unit is frequency Hz)；Spacing d in adjacent metal hole_cLess than λ_g/ 4, at feed mouth, the spacing between two rounds should strengthen to realize vertically passing Cross the coupling of structure, its size can be determined by simulation software.

It should be noted that: according to actual needs, the present invention can realize defeated by changing the direction of metal waveguide Go out the homophase of port or anti-phase；As it is shown on figure 3, be disposed vertically by metal waveguide broadside, then it is equivalent to waveguide E-T structure, two The anti-phase output of output port；As shown in Figure 4, by metal waveguide broadside horizontal positioned, then it is equivalent to waveguide H-T structure, two outputs Port homophase exports.

The beneficial effects of the present invention is:

The present invention provides a kind of and uses metal waveguide to the power splitter of substrate integration wave-guide, from a structural point, simplifies Feed structure, it is reduced in size, it is simple to the system integration and miniaturization；For from electrical property, improve feed efficiency, reduce and damage Consumption；Meanwhile, the homophase/anti-phase output of output port can be designed according to actual needs, it is not necessary to increase phase-shift structure and realize wideband Band, the inversion signal output of high stability.

Accompanying drawing explanation

Fig. 1 is the conventional metals waveguide planar structure schematic diagram to chip integrated waveguide power distributor.

Fig. 2 is the feed structure schematic diagram of the metal waveguide-chip integrated waveguide power distributor of the present invention.

Fig. 3 is the metal waveguide-substrate integrated waveguide E face power divider structure schematic diagram of the present invention.

Fig. 4 is the metal waveguide-substrate integration wave-guide H face power divider structure schematic diagram of the present invention.

Fig. 5 is the metal waveguide-substrate integrated waveguide E face power splitter of present invention application example figure in array antenna.

Detailed description of the invention

With embodiment, the present invention is described in further details below in conjunction with the accompanying drawings.

Embodiment 1

The present embodiment provides a kind of metal waveguide-substrate integrated waveguide E face power splitter, and its structure as shown in Figure 2 and Figure 3, should Power splitter is operated in W-waveband, and operating frequency 85～100GHz, including a substrate integration wave-guide and standard metal straight wave guide, gold Belonging to waveguide model is WR10, and size is 1.27 × 2.54mm, and the model of substrate integration wave-guide is Rogers 5880 (tm), sheet material Thickness is 0.508mm, relative dielectric constant 2.2, loss angle tangent 0.0014, and on substrate integration wave-guide, all of bore dia is all 0.4mm, and all metallize；Described substrate integration wave-guide includes the bottom copper clad layers 7 stacked gradually from the bottom up, dielectric layer 6, pushes up Layer copper clad layers 5, and plated through-hole 61,63；In order to realize metal waveguide to substrate integration wave-guide vertical transition feed and merit Point, bottom copper clad layers 7 etches the feed mouth 71 that size is consistent with metal waveguide 8 mouthfuls, size is 1.27 × 2.54mm, metal Waveguide broadside is disposed vertically, in order to make transition reach good coupling, and need to be along feed mouth 71 symmetry on substrate integration wave-guide Arranging a circle plated through-hole 63 makes transition reach matched well, and the size of this collar aperture is 1.8 × 4mm；The output channel of power splitter 64,65 is symmetrical, and its width is the distance of center circle between two row's plated through-holes, for 1.8mm；In order to make substrate integration wave-guide and Metal waveguide fits tightly, and makes the screw 62 with waveguide flange position consistency and incite somebody to action will pass through screw on substrate integration wave-guide Substrate integration wave-guide and metal waveguide are fixed.

Above-mentioned power splitter is obtained at 85～100GHz frequency range standing internal waves less than 1.5, two outfans by HFSS emulation The anti-phase output of mouth, phase equalization degree is less than 0.02 °, it is possible to realize the anti-phase output of broadband；It addition, by metal waveguide broadside level Place, as shown in Figure 4, for metal waveguide-substrate integration wave-guide H face power splitter, it is possible to realize the output of broadband homophase.

Embodiment 2

The present embodiment provides the array antenna of a kind of metal waveguide-substrate integration wave-guide, and its structure is as it is shown in figure 5, this sky Line is operated in W-waveband, and operating frequency is 92～94GHz, and metal waveguide model is WR10, and size is 1.27 × 2.54mm, substrate Integrated waveguide model is Rogers 5880 (tm), and sheet metal thickness is 0.508mm, relative dielectric constant 2.2, loss angle tangent 0.0014, on substrate integration wave-guide, all of bore dia is all 0.4mm, and all metallizes.Metal waveguide is by feed mouth 71 coupling Closing substrate integration wave-guide, the size of feed mouth 71 is 1.27 × 2.54mm, and substrate integration wave-guide need to set along feed mouth 71 Put a circle grommet so that transition can well be mated, between hole 631 and hole 632, have 3 holes, the spacing between adjacent two holes For 0.525mm, having 4 holes between hole 632 and hole 633, they are symmetrical about 71, hole 631 feed relative with hole 632 mouth 71 The horizontal range in the upper left corner is 0.73mm, and vertical dimension is respectively 0.415mm and 1.685mm.Signal feed-in substrate integration wave-guide After by by the tree-shaped constant power allotter of 1 point 16, each output port of power splitter is connected to the lap gating system of 16 seams Array antenna, each T junction of power splitter and corner have corresponding tuned window to make power splitter reach well to mate, each tune Humorous hole is all symmetrical above and below about T junction, as long as so providing position and the node center in corner hole 661,662,663,664 Behind the position in hole 671,672,673, place, the position at the hole of other corner location and Centroid is assured that.Hole 661, 662,663,664 horizontal ranges relatively feeding mouth 71 upper right corner are respectively 1.67mm, 3.23mm, 8.21mm and 12.87mm, hang down Straight distance is 8.315mm, 12.52mm, 14.52mm and 15.34mm；Hole 671,672,673 feeds the water in mouth 71 upper left corner relatively Flat distance respectively 3.63mm, 8.81mm, 14.51mm, vertical dimension is respectively 7.92mm, 12.11mm, 14.07mm.

16 output ports of power splitter are each connected to the passage being made up of aperture, and the width of each passage is 2.1mm, and Two adjacent interchannels share a round.The slot array antenna of each output port is identical, and the most a total of 16 Bar stitches, and the position in above 8 row gaps and following 8 row gaps is symmetrical above and below about the median plane of whole permutation, as long as therefore determining The position in the first row gap, the position in other gaps also determines that, the distance in adjacent two row gaps and the distance in gap 51 and 53 Identical, it is the width 2.1mm of passage, a total of 14 seams between gap 51 and 52, the length in gap is all 1.1mm, adjacent The distance in two gaps is about λ_g/ 2, it is 1.34mm here, and each gap is interspersed about the centrosymmetry of passage, skew Amount is 0.2mm, stitches a width of 0.2mm, and the center of circle horizontal range in the hole 68 stitching 52 centre distance passage bottoms is about λ_g/ 4 and hole half Footpath sum, is 0.82mm here, and horizontal level and the upright position in centre distance feed mouth 71 upper right corner in gap 51 are respectively 19.54mm and 14.9mm.Being distributed in of screw 621～624 symmetry feeds mouth 71 around, is used for fixing metal waveguide and substrate Integrated waveguide.

Can be obtained by HFSS emulation, the gain of this antenna, up to 26.5dBi, inputs in 92～94GHz frequency ranges Standing wave is less than 1.5, and plank is reduced into 50 × 35mm by 65 original × 35mm, and area reduces about 25%, has reached miniaturization The purpose of Compact power divider.

The above, the only detailed description of the invention of the present invention, any feature disclosed in this specification, unless especially Narration, all can be by other equivalences or have the alternative features of similar purpose and replaced；Disclosed all features or all sides Method or during step, in addition to mutually exclusive feature and/or step, all can be combined in any way.

Claims (2)

1. metal waveguide-chip integrated waveguide power distributor, including substrate integration wave-guide and metal straight waveguide；Described substrate collection Become bottom copper clad layers that waveguide includes stacking gradually from the bottom up, dielectric layer, top layer copper clad layers, and run through bottom copper clad layers, Dielectric layer and two row's plated through-holes of top layer copper clad layers；It is characterized in that, in the bottom copper clad layers of described substrate integration wave-guide also Offering feed mouth, described feed mouth is positioned at substrate integration wave-guide center and size and keeps consistent with metal straight waveguide mouth, described Metal straight waveguide is vertically fed to substrate integration wave-guide by feed mouth.

2. metal waveguide-chip integrated waveguide power distributor as described in claim 1, it is characterised in that described substrate integration wave-guide On be additionally provided with and the screw of waveguide flange position consistency, for fixing substrate integration wave-guide and metal straight waveguide by screw.