CN209016241U

CN209016241U - Csrr metallic vias filter based on SIW structure

Info

Publication number: CN209016241U
Application number: CN201821834756.6U
Authority: CN
Inventors: 秦润莲
Original assignee: Nanjing Forestry University
Current assignee: Nanjing Forestry University
Priority date: 2018-11-08
Filing date: 2018-11-08
Publication date: 2019-06-21
Anticipated expiration: 2028-11-08

Abstract

The utility model discloses the csrr metallic vias filters based on SIW structure, belong to microwave filter field, csrr metallic vias filter based on SIW structure, including dielectric-slab, the lower end of dielectric-slab is fixedly connected with bottom layer ground metal foil, the upper end of dielectric-slab is fixedly connected with top-level metallic foil, digging on top-level metallic foil has two rows of equally distributed first metal throuth holes, and two rows of equally distributed first metal throuth holes are located at the up-and-down boundary of top-level metallic foil, the left and right ends of top-level metallic foil are fixedly connected to port microstrip lead-out wire, a pair of of port microstrip lead-out wire is about the substantially symmetrical about its central axis of top-level metallic foil, port microstrip lead-out wire is convex microstrip line transition structure, and port microstrip lead-out wire is located at the middle part of dielectric-slab, it is simple that structure may be implemented, it is small in size, it is light-weight, it is at low cost, letter Number transmission loss is small, and insertion loss is low, and return loss is high, has good transmission performance.

Description

Csrr metallic vias filter based on SIW structure

Technical field

The utility model relates to microwave filter fields, more specifically to the csrr metal mistake based on SIW structure Hole filter.

Background technique

Microwave filter is a kind of passive device, while being the important composition device of Modern Communication System.Make to need in circuit The signal wanted can pass through, so in circuit, the performance of filter in the communication quality and system of communication system Superiority and inferiority have a highly important relationship, the performance of filter can even have a direct impact communication system.With social section The development of technology, while filter rapidly develops, the scale of circuit is also in further expansion.

In order to improve the transmission performance of filter, it is desirable that filter has low insertion loss and high return loss, more attaches most importance to It wants, in order to meet the trend toward miniaturization of Modern communications terminals, it is desirable that filter will have smaller volume and weight, filter sometimes Wave device size is even more important than performance.The insertion loss of conventional filter is bigger, and return loss is smaller, leads to transporting Poor and traditional rectangular waveguide volume is big, and weight is big.Therefore it is badly in need of a kind of minimize and the high filtering of transmission performance at present Device solves above-mentioned technical problem.

Utility model content

1. technical problems to be solved

Aiming at the problems existing in the prior art, the purpose of this utility model is to provide the csrr gold based on SIW structure Belong to via hole filter, it may be implemented, and structure is simple, and small in size, light-weight, at low cost, signal transmission attenuation is small, insertion loss Low, return loss is high, has good transmission performance.

2. technical solution

To solve the above problems, the utility model adopts the following technical scheme.

Csrr metallic vias filter based on SIW structure, including dielectric-slab, the lower end of the dielectric-slab are fixedly connected with Bottom layer ground metal foil, the upper end of the dielectric-slab are fixedly connected with top-level metallic foil, and digging on the top-level metallic foil has two Equally distributed first metal throuth hole is arranged, and two rows of equally distributed first metal throuth holes are located at the upper and lower of top-level metallic foil Boundary, the left and right ends of the top-level metallic foil are fixedly connected to port microstrip lead-out wire, and a pair of port microstrip is drawn Line is substantially symmetrical about its central axis about top-level metallic foil, and the port microstrip lead-out wire is convex microstrip line transition structure, and port is micro- Be located at the middle part of dielectric-slab with lead-out wire, be fixedly connected on the top-level metallic foil a pair of second hexagon csrr resonator and A pair of first hexagon csrr resonator, the second hexagon csrr resonator and the first hexagon csrr resonator distinguish position Digging at top-level metallic foil horizontal center line one third and 2/3rds, on the top-level metallic foil has a pair of second metal Through-hole, and the second metal throuth hole is between the second hexagon csrr resonator and the first hexagon csrr resonator, Yi Duisuo It states the second metal throuth hole to be located at top-level metallic foil horizontal center line one third and 2/3rds, structure may be implemented in it Simply, small in size, light-weight, at low cost, signal transmission attenuation is small, and insertion loss is low, and return loss is high, has good transmission Performance.

Further, sub-miniature A connector is respectively connected on a pair of port microstrip lead-out wire.

Further, the SIW characteristic impedance that the port microstrip lead-out wire is 50 ohm matches microstrip line.

Further, first metal throuth hole and the second metal throuth hole are circle, and the first metal throuth hole and second Metal throuth hole runs through dielectric-slab and bottom layer ground metal foil, is metallization in first metal throuth hole and the second metal throuth hole Processing, and top-level metallic foil is connected with bottom layer ground metal foil by the first metal throuth hole and the second metal throuth hole.

Further, the diameter of first metal throuth hole is 0.5mm, between the two neighboring bottom layer ground metal foil Distance of center circle be 1mm, the diameter of second metal throuth hole is 0.01mm.

Further, the bottom layer ground metal foil and top-level metallic foil are copper foil, and the dielectric-slab is to use Rogers RT/duroid 5880 (tm) material, and the relative dielectric constant of dielectric-slab be 2.2, the dielectric-slab with a thickness of 0.508mm, the port microstrip lead-out wire with a thickness of 0.003mm.

Further, the length of the top-level metallic foil is 20mm, and the width of the top-level metallic foil is 12mm, described The center of second hexagon csrr resonator and the first hexagon csrr resonator is respectively positioned at horizontal center line 3.28mm, The first hexagon csrr resonator include the first big six side ring and the first small six side ring, outer the six of first big six side ring Side shape side length is 2mm, and the interior hexagonal side length of first big six side ring is 1.7mm, and the opening of first big six side ring is long Degree is 0.8mm, and the outer hexagonal side length of first small six side ring is 1.19mm, the interior hexagon side of first small six side ring A length of 0.89mm, the Opening length of first small six side ring are 0.5mm, and the second hexagon csrr resonator includes the Two imperial palace side rings and the second small interior side ring, the outer hexagonal side length of the second largest interior side ring are 1.5mm, described second largest interior Hexagonal side length is 1.2mm in side ring, and the second largest interior side ring Opening length is 0.4mm, the second small interior side ring it is outer Hexagonal side length is 0.8mm, and the interior hexagonal side length of the second small interior side ring is 0.5mm, and the second small interior side ring is opened Mouth length is 0.2mm.

3. beneficial effect

Compared with the prior art, utility model has the advantages that

(1) this programme port microstrip lead-out wire uses convex microstrip line transition structure, which can not only realize The excessive of energy, transmitting and conversion, are also beneficial to the effective integration of filter, have achieved the effect that minimize filter, and Convex transition structure overcomes the reflection problems of the direct transition of people, and the influence to fields inside is small.

(2) compared to common round and rectangular csrr resonance ring structure, the second hexagon csrr resonator in this programme Area occupied by hexagon csrr resonance ring structure with the first hexagon csrr resonator is smaller, and more conducively filter is small Type.

(3) centre frequency of the utility model structure is 12.5Ghz, and transmission zero is located at 13.4Ghz, and passband width is about For 1.5Hhz, return loss can reach -18dB near pass-band, and insertion loss reaches -0.81dB near pass-band, more common Csrr Structure Filter has good band logical effect, and has broader passband.

(4) the utility model structure is significantly improved by way of the second metal throuth hole is added on horizontal center line Band resistance effect at its transmission zero drastically reduces return loss between 13.15-13.4Ghz to -25dB, filtering effect Fruit is obviously improved.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is the floor map of the utility model；

Fig. 3 is the return loss analogous diagram of the utility model.

Figure label explanation:

1 bottom layer ground metal foil, 2 dielectric-slabs, 3 top-level metallic foils, 4 first metal throuth holes, 5 port microstrip lead-out wires, 6 Two metal throuth holes, 7 second hexagon csrr resonators, 8 first hexagon csrr resonators.

Specific embodiment

The following is a combination of the drawings in the embodiments of the present utility model；The technical scheme in the embodiment of the utility model is carried out Clearly and completely describe；Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment, based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.a

In the description of the present invention, it should be noted that term " on ", "lower", "inner", "outside", " top/bottom end " etc. The orientation or positional relationship of instruction is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description the utility model It is described with simplifying, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation structure It makes and operates, therefore should not be understood as limiting the present invention.In addition, term " first ", " second " are only used for description mesh , it is not understood to indicate or imply relative importance.

In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified Dress ", " being provided with ", " be arranged/connect ", " connection " etc., shall be understood in a broad sense, such as " connection ", may be a fixed connection, can also be with It is to be detachably connected, or be integrally connected；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, it can also be with Indirectly connected through an intermediary, it can be the connection inside two elements.For the ordinary skill in the art, may be used The concrete meaning of above-mentioned term in the present invention is understood with concrete condition.

Embodiment 1:

Csrr metallic vias filter based on SIW structure referring to FIG. 1-2, including dielectric-slab 2, the lower end of dielectric-slab 2 It is fixedly connected with bottom layer ground metal foil 1, the upper end of dielectric-slab 2 is fixedly connected with top-level metallic foil 3, bottom layer ground metal foil 1, Dielectric-slab 2 and top-level metallic foil 3 fit closely, and digging on top-level metallic foil 3 has two rows of equally distributed first metal throuth holes 4, And two rows of equally distributed first metal throuth holes 4 are located at the up-and-down boundary of top-level metallic foil 3, the left and right of top-level metallic foil 3 Both ends are fixedly connected to port microstrip lead-out wire 5, central axis pair of a pair of of port microstrip lead-out wire 5 about top-level metallic foil 3 Claim, port microstrip lead-out wire 5 is convex microstrip line transition structure, and port microstrip lead-out wire 5 is located at the middle part of dielectric-slab 2, top The second hexagon csrr resonator of a pair 7 and a pair of first hexagon csrr resonator 8 are fixedly connected in layer metal foil 3, the Two hexagon csrr resonators 7 and the first hexagon csrr resonator 8 are located at 3 horizontal center line three of top-level metallic foil and divide One of and 2/3rds at, digging on top-level metallic foil 3 has a pair of second metal throuth hole 6, and the second metal throuth hole 6 is located at second Between hexagon csrr resonator 7 and the first hexagon csrr resonator 8, a pair of second metal throuth hole 6 is located at top layer gold Belonging at 3 horizontal center line one third of foil and 2/3rds, it is simple that it may be implemented structure, and it is small in size, it is light-weight, it is at low cost.

Sub-miniature A connector, the SIW characteristic that port microstrip lead-out wire 5 is 50 ohm are respectively connected on a pair of of port microstrip lead-out wire 5 Impedance matching microstrip line, bottom layer ground metal foil 1 and top-level metallic foil 3 are copper foil, and dielectric-slab 2 is using Rogers RT/ Duroid 5880 (tm) material, and the relative dielectric constant of dielectric-slab 2 be 2.2, dielectric-slab 2 with a thickness of 0.508mm, port Micro-strip lead-out wire 5 with a thickness of 0.003mm.

First metal throuth hole 4 and the second metal throuth hole 6 are circle, and the first metal throuth hole 4 and the second metal throuth hole 6 are It is metalized in the first metal throuth hole 4 and the second metal throuth hole 6, and push up through dielectric-slab 2 and bottom layer ground metal foil 1 Layer metal foil 3 is connected by the first metal throuth hole 4 with the second metal throuth hole 6 with bottom layer ground metal foil 1, the first metal throuth hole 4 diameter is 0.5mm, and the distance of center circle between two neighboring bottom layer ground metal foil 1 is 1mm, and the diameter of the second metal throuth hole 6 is 0.01mm。

The length of top-level metallic foil 3 is 20mm, and the width of top-level metallic foil 3 is 12mm, the second hexagon csrr resonator 7 and first the center of hexagon csrr resonator 8 be respectively positioned at horizontal center line 3.28mm, the first hexagon csrr is humorous The device 8 that shakes includes the first big six side ring and the first small six side ring, and the outer hexagonal side length of the first big six side ring is 2mm, and first is big by six The interior hexagonal side length of side ring is 1.7mm, and the Opening length of the first big six side ring is 0.8mm, outer six side of the first small six side ring Shape side length is 1.19mm, and the interior hexagonal side length of the first small six side ring is 0.89mm, and the Opening length of the first small six side ring is 0.5mm, the second hexagon csrr resonator 7 include the second largest interior side ring and the second small interior side ring, outer the six of the second largest interior side ring Side shape side length is 1.5mm, and hexagonal side length is 1.2mm in the second largest interior side ring, and the second largest interior side ring Opening length is 0.4mm, The outer hexagonal side length of second small interior side ring is 0.8mm, and the interior hexagonal side length of the second small interior side ring is 0.5mm, and second is small interior The Opening length of side ring is 0.2mm, and the second hexagon csrr resonator 7 and the first hexagon csrr resonator 8 include two embedding The hexagonal apertures ring of different sizes of set, passes through calculation optimization the second hexagon csrr resonator 7 and the first hexagon csrr The side length of 8 inner and outer ring of resonator can obtain excellent filter effect.

Referring to Fig. 3, the return loss analogous diagram of this programme, the centre frequency of the utility model structure is 12.5Ghz, Transmission zero is located at 13.4Ghz, and passband width is about 1.5Hhz, and return loss can reach -18dB, insertion damage near pass-band Consumption reaches -0.81dB near pass-band, and more common csrr Structure Filter has good band logical effect, and has broader Passband, the utility model structure significantly improve its biography by way of the second metal throuth hole 6 is added on horizontal center line Band resistance effect at defeated zero point, drastically reduces return loss between 13.15-13.4Ghz to -25dB, filter effect is obvious It is promoted, signal transmission attenuation is small, and insertion loss is low, and return loss is high, has good transmission performance.

It is described above；The only preferable specific embodiment of the utility model；But the protection scope of the utility model is not It is confined to this.Anyone skilled in the art is within the technical scope disclosed by the utility model, practical according to this Novel technical solution and its improvement design is subject to equivalent substitution or change, should all cover in the protection scope of the utility model It is interior.

Claims

1. A csrr metal via hole filter based on an SIW structure, comprising a dielectric plate (2), characterized in that: the lower end of the dielectric plate (2) is fixedly connected with a bottom ground metal foil (1), and the dielectric plate (2) ) is fixedly connected to the upper end of the top metal foil (3), the top metal foil (3) is drilled with two rows of uniformly distributed first metal through holes (4), and the two rows of uniformly distributed first metal through holes ( 4) are respectively located on the upper and lower boundaries of the top metal foil (3), the left and right ends of the top metal foil (3) are fixedly connected with port microstrip lead wires (5), and a pair of the port microstrip lead wires (5) ) is symmetrical about the central axis of the top metal foil (3), the port microstrip lead line (5) is a convex microstrip line transition structure, and the port microstrip lead line (5) is located in the middle of the dielectric plate (2), A pair of second hexagonal csrr resonators (7) and a pair of first hexagonal csrr resonators (8) are fixedly connected to the top metal foil (3), and the second hexagonal csrr resonators ( 7) and the first hexagonal csrr resonator (8) are located at one-third and two-thirds of the horizontal centerline of the top metal foil (3), and a pair of second a metal through hole (6), and the second metal through hole (6) is located between the second hexagonal csrr resonator (7) and the first hexagonal csrr resonator (8), a pair of said second metal The through holes (6) are located at one-third and two-thirds of the horizontal centerline of the top metal foil (3), respectively.

2 . The csrr metal via filter based on the SIW structure according to claim 1 , wherein a pair of the port microstrip lead wires ( 5 ) are both connected with SMA connectors. 3 .

3. The csrr metal via filter based on SIW structure according to claim 1, characterized in that: the port microstrip lead-out line (5) is a 50 ohm SIW characteristic impedance matching microstrip line.

4. The csrr metal via filter based on the SIW structure according to claim 1, wherein the first metal via (4) and the second metal via (6) are both circular, and the first metal via (4) and the second metal via (6) are circular A metal through hole (4) and a second metal through hole (6) both pass through the dielectric plate (2) and the bottom metal foil (1), the first metal through hole (4) and the second metal through hole (6) ) is metallized, and the top metal foil (3) and the bottom ground metal foil (1) are connected through a first metal through hole (4) and a second metal through hole (6).

5 . The csrr metal via filter based on SIW structure according to claim 1 , wherein the diameter of the first metal via ( 4 ) is 0.5 mm, and two adjacent bottom metal foils are grounded. 6 . The center-to-center distance between (1) is 1 mm, and the diameter of the second metal through hole (6) is 0.01 mm.

6. The csrr metal via filter based on SIW structure according to claim 1, characterized in that: the bottom ground metal foil (1) and the top metal foil (3) are both copper foils, and the dielectric plate ( 2) Rogers RT/duroid 5880(tm) material is used, and the relative permittivity of the dielectric plate (2) is 2.2, the thickness of the dielectric plate (2) is 0.508mm, and the port microstrip lead wire (5) ) is 0.003mm thick.

7. The csrr metal via filter based on SIW structure according to claim 1, characterized in that: the length of the top metal foil (3) is 20 mm, and the width of the top metal foil (3) is 12 mm, The centers of the second hexagonal csrr resonator (7) and the first hexagonal csrr resonator (8) are both located at a distance of 3.28 mm from the horizontal centerline, and the first hexagonal csrr resonator (8) Including a first large hexagonal ring and a first small hexagonal ring, the outer hexagonal side length of the first large hexagonal ring is 2mm, and the inner hexagonal side length of the first large hexagonal ring is 1.7 mm mm, the opening length of the first large hexagonal ring is 0.8 mm, the length of the outer hexagonal side of the first small hexagonal ring is 1.19 mm, and the inner hexagonal side of the first small hexagonal ring is 1.19 mm. The length is 0.89mm, the opening length of the first small hexagonal ring is 0.5mm, the second hexagonal csrr resonator (7) includes a second large inner ring and a second small inner ring, the The side length of the outer hexagon of the second largest inner edge ring is 1.5mm, the length of the inner hexagon of the second largest inner edge ring is 1.2mm, and the length of the opening of the second largest inner edge ring is 0.4mm, so The length of the outer hexagon of the second small inner ring is 0.8mm, the length of the inner hexagon of the second small inner ring is 0.5mm, and the length of the opening of the second small inner ring is 0.2 mm.