CN100449864C

CN100449864C - Substrate integrated waveguide comb-shaped power distributor

Info

Publication number: CN100449864C
Application number: CNB200610097287XA
Authority: CN
Inventors: 洪伟; 刘冰
Original assignee: Southeast University
Current assignee: Southeast University
Priority date: 2006-10-27
Filing date: 2006-10-27
Publication date: 2009-01-07
Anticipated expiration: 2026-10-27
Also published as: CN1949590A

Abstract

The invention discloses a substrate integrated waveguide comb power distributor relating to millimeter wave and microwave devices, comprising a medium substrate equipped with metal patches on the two sides, where the medium substrate is equipped with a waveguide as input end and waveguides as output ends which at least comprise first output end and second output end, the waveguide as input end intersects the waveguide as output end, and the above waveguides are composed of at least two metallized through holes. And it adopts a comb structure, smaller in size, and simultaneously the character that the adjacent output ends are phase- inverted further compresses space between output ports, and thus the its size is reduced by above 50% as compared with the traditional tree power distributor. Because the top and bottom metal coatings and the metallized through holes compose a closed structure with respect to electromagnetic wave in operating frequency range, the electromagnetic energy can not diffuse outside the structure and it has low loss property.

Description

Substrate integrated waveguide comb-shaped power distributor

Technical field

The present invention relates to a kind of millimeter wave and microwave device, relate in particular to a kind of comb-shaped power distributor that adopts substrate integrated waveguide technology.

Background technology

In existing microwave slot array antenna, the forms that adopt rectangular waveguide to combine as guided wave structure formed and tree-shaped power divider more, hardware requirement on machining accuracy height not only, integrated level is low, so also be difficult for simultaneously large-scale production. the tree-shaped power divider of same employing satisfies volume production and integrated level as the chip integrated waveguide slot array antenna of feeding network needs have appearred. but being used as the size defective bigger than normal that feeding network brings, tree-shaped power divider still can't avoid, thereby cause the bore efficient of entire antenna array to reduce. the comb-shaped power distributor that proposes among the present invention is compared with traditional tree-shaped power divider, size reduces (situations of four output ports) more than 50%, and increase along with output port number, if this comb-shaped power distributor advantage dimensionally can be obvious further. extensive aerial array feeding network adopts this comb-shaped power distributor as feeding network, and dimension reduction degree on the whole can surpass 90%.

Summary of the invention

The invention provides a kind of compact conformation of substrate integrated waveguide technology, substrate integrated waveguide comb-shaped power distributor that the power output degree of balance is good, output phase is stable of adopting, this dispenser size is little, integrated level good, cost is low, be convenient to large-scale production.

The present invention adopts following technical scheme:

A kind of substrate integrated waveguide comb-shaped power distributor that relates to millimeter wave and microwave device, comprise the two-sided dielectric substrate that is provided with metal patch, on dielectric substrate, be provided with as the waveguide of input with as the waveguide and the output of output and comprise first output and second output at least, waveguide as input is intersected with the waveguide as output, above-mentioned waveguide is made of 2 row metal through holes at least, it is characterized in that the waveguide as input is a transversal waveguides, waveguide as output is vertical waveguide, be provided with 2 plated-through holes as in the waveguide of input and the intersecting area as the waveguide of first output, these 2 plated-through holes are positioned at as side under the center line of input waveguide and lay respectively at both sides as the waveguide core line of first output, be provided with 2 plated-through holes as in the waveguide of input and the intersecting area as the waveguide of second output, these 2 plated-through holes are positioned at as side under the center line of the waveguide of input and lay respectively at both sides as the waveguide core line of second output.

Compared with prior art, the present invention has following advantage:

Combined base Integrated Waveguide Technology of the present invention is realized power division with pectinate texture, and the power output of output is identical, and the output phase between the adjacent output port is anti-phase.

The concrete advantage of the present invention is as follows:

1. compact conformation, be easy to integrated: because this power divider has adopted pectinate texture, tree-shaped power divider more traditional on the size reduces, utilize the anti-phase characteristic of the adjacent output phase place of well-designed power divider further to compress interval between the output port simultaneously, thereby the size of whole power divider reduces (situations of four road outputs) more than 50% than traditional tree-shaped power divider, also identical than each output port phase place comb-shaped power distributor feed structure reduces 25%. simultaneously for a short time in size, because this substrate integration wave-guide (SIW) structure adopts single-layer printed circuit plate (PCB) explained hereafter, be integrated in the large-scale circuit and go so can be used as the part of printed circuit board (PCB), avoided loaded down with trivial details in the design.

2. power output equates; The ad-hoc location of the independently plated-through hole of the adjusting usefulness by power divider inside is arranged, and makes that the power output of four output ports is identical, the favourable integrated application that is used in aerial array and other millimeter wave microwave circuit.

3. low-loss; Because the upper and lower metal backing in substrate integration wave-guide (SIW) structure and the plated-through hole of both sides are rendered as a kind of enclosed construction of similar traditional filled media rectangular metal waveguide to the electromagnetic wave in the working band, so electromagnetic energy can not be dissipated to outside this structure, thereby has low-loss characteristic.

4. low-cost; Because this substrate integration wave-guide (SIW) structure only is made of the plated-through hole that the single-layer medium plate adds upper and lower double layer of metal coating and both sides, so can adopt very ripe at present single-layer printed circuit plate (PCB) production technology to produce, cost is very cheap.

5. can large-scale production; Traditional rectangular metal waveguide is very high to requirement on machining accuracy, and difficulty of processing is big, so can not large-scale production.And substrate integration wave-guide (SIW) structure that this power divider adopts just can meet the requirements of precision and satisfied performance is arranged according to employed single-layer printed circuit plate (PCB) production technology, and institute is so that large-scale production.

6. the upper and lower surface of device all has metal to cover, and antijamming capability is strong.

Description of drawings

Fig. 1 is a structural front view of the present invention.

Fig. 2 is a structure side view of the present invention.

Fig. 3 is a structure rearview of the present invention.

Fig. 4 is the present invention (left side) and the schematic diagram of tree-shaped power divider (right side) size of identical index contrast.

Fig. 5 is the structural representation of plated-through hole of the present invention.

Fig. 6 is a transmission performance test curve chart of the present invention.

Fig. 7 is the test curve figure of phase difference performance between the output of the present invention.

Embodiment

Present embodiment is described to be a kind of substrate integrated waveguide comb-shaped power distributor that relates to millimeter wave and microwave device.

With reference to Fig. 2, present embodiment comprises the two-sided dielectric substrate 1 that is covered with metal patch 2,3;

With reference to Fig. 1 and Fig. 3, on dielectric substrate 1, be provided with as the waveguide of input 41 with as the waveguide and the output of output and comprise first output 42 and second output 43 at least, waveguide as input 41 is intersected with the waveguide as output, above-mentioned waveguide is made of 2 row metal through holes at least, it is characterized in that the waveguide as input 41 is a transversal waveguides, waveguide as output is vertical waveguide, be provided with 2 plated-through holes 51 as in the waveguide of input 41 and the intersecting area as the waveguide of first output 42,52, these 2 plated-through

holes

51,52 are positioned at as side under the center line of input 41 waveguides and lay respectively at both sides as the waveguide core line of first output 42, be provided with 2 plated-through holes 53 as in the waveguide of input 41 and the intersecting area as the waveguide of second output 43,54, these 2 plated-through holes 53,54 are positioned at as side under the center line of the waveguide of input 41 and lay respectively at both sides as the waveguide core line of second output 43;

Above-mentioned output comprises the waveguide as the 3rd output 44, be provided with 2 plated-through holes 55,56 as in the waveguide of input 41 and the intersecting area as the waveguide of the 3rd output 44, it is 15～30 ° with angle as the center line of the waveguide of the 3rd output 44 that these 2 plated-through holes 55,56 are positioned at as the line of the both sides of the center line of the waveguide of input 41 and these 2 plated-through holes 55,56;

Above-mentioned output comprises the waveguide as the 4th output 45, be provided with plated-through hole 57 as in the waveguide of input 41 and the intersecting area as the waveguide of the 4th output 45, this plated-through hole 57 is positioned at as the top of the center line of the waveguide of input 41 and is positioned at center line right side as 45 waveguides of the 4th output;

Above-mentioned as the waveguide of input 41 be 0～15 ° as the line of 2 plated-through

holes

51,52 in the intersecting area of the waveguide of first output 42 and the angle that is used as between the center line of input 41 waveguides;

Above-mentioned as the waveguide of input 41 be 0～15 ° as the line of 2 plated-through holes 53,54 in the intersecting area of the waveguide of second output 43 and the angle that is used as between the center line of input 41 waveguides.

With reference to Fig. 5, plated-through hole is to offer through hole at the two-sided dielectric substrate 1 that is covered with metal forming 2,3, and metallic sheath 5 is set in through hole, and the two ends of this metallic sheath 5 are connected with metal patch 2,3 respectively.

With reference to Fig. 6, the test curve of the power output degree of balance of this power divider, in the scope of 19.3GH-19.7GHz, power output fluctuates in 6.7 decibels ± 0.6 decibel, and corresponding insertion loss is 0.7 decibel.

With reference to Fig. 7, the test curve of the output phase degree of balance of this power divider, in the scope of 19.3GH-19.7GHz, output phase fluctuates in 190 ° ± 5 °, has good phase stability.

Claims

1, a kind of substrate integrated waveguide comb-shaped power distributor that relates to millimeter wave and microwave device, comprise the two-sided metal patch (2 that is provided with, 3) dielectric substrate (1), on dielectric substrate (1), be provided with as the waveguide of input (41) with as the waveguide and the output of output and comprise first output (42) and second output (43) at least, waveguide as input (41) is intersected with the waveguide as output, above-mentioned waveguide is made of 2 row metal through holes at least, it is characterized in that the waveguide as input (41) is a transversal waveguides, waveguide as output is vertical waveguide, be provided with 2 plated-through holes (51 as in the waveguide of input (41) and the intersecting area as the waveguide of first output (42), 52), these 2 plated-through holes (51,52) be positioned at as side under the center line of input (41) waveguide and lay respectively at both sides as the waveguide core line of first output (42), be provided with 2 plated-through holes (53 as in the waveguide of input (41) and the intersecting area as the waveguide of second output (43), 54), these 2 plated-through holes (53,54) be positioned at as side under the center line of the waveguide of input (41) and lay respectively at both sides as the waveguide core line of second output (43).

2, substrate integrated waveguide comb-shaped power distributor according to claim 1, it is characterized in that output comprises the waveguide as the 3rd output (44), be provided with 2 plated-through holes (55,56) as in the waveguide of input (41) and the intersecting area as the waveguide of the 3rd output (44), it is 15～30 with angle as the center line of the waveguide of the 3rd output (44) that these 2 plated-through holes (55,56) are positioned at as the line of the both sides of the center line of the waveguide of input (41) and these 2 plated-through holes (55,56)

3, substrate integrated waveguide comb-shaped power distributor according to claim 1 and 2, it is characterized in that output comprises the waveguide as the 4th output (45), be provided with plated-through hole (57) as in the waveguide of input (41) and the intersecting area as the waveguide of the 4th output (45), this plated-through hole (57) is positioned at as the top of the center line of the waveguide of input (41) and is positioned at center line right side as the 4th output (45) waveguide.

4, substrate integrated waveguide comb-shaped power distributor according to claim 3, it is characterized in that as the waveguide of input (41) be 0～15 as the line of 2 plated-through holes (51,52) in the intersecting area of the waveguide of first output (42) and the angle that is used as between the center line of input (41) waveguide

5, substrate integrated waveguide comb-shaped power distributor according to claim 3, it is characterized in that as the waveguide of input (41) be 0～15 as the line of 2 plated-through holes (53,54) in the intersecting area of the waveguide of second output (43) and the angle that is used as between the center line of input (41) waveguide