CN215896656U

CN215896656U - 6Ghz-15Ghz composite ferrite microstrip circulator

Info

Publication number: CN215896656U
Application number: CN202122107031.5U
Authority: CN
Inventors: 周川平; 何欣玙
Original assignee: Chengdu Zhili Micro Tech Co ltd
Current assignee: Chengdu Zhili Micro Tech Co ltd
Priority date: 2021-09-02
Filing date: 2021-09-02
Publication date: 2022-02-22
Anticipated expiration: 2031-09-02

Abstract

The utility model discloses a 6Ghz-15Ghz composite ferrite micro-strip circulator, which comprises a substrate and a circulator circuit printed on the substrate; the substrate comprises a low magnetic moment substrate and a high magnetic moment substrate nested at the inner side of the low magnetic moment substrate, the middle position of the circuit is printed on the high magnetic moment substrate, and the peripheral position of the circuit is printed on the low magnetic moment substrate. The 6Ghz-15Ghz composite ferrite microstrip circulator has the advantages of wide working frequency band, small volume, simple process, small debugging difficulty, excellent performance and the like.

Description

6Ghz-15Ghz composite ferrite microstrip circulator

Technical Field

The utility model relates to the field of circulators, in particular to a 6Ghz-15Ghz composite ferrite microstrip circulator.

Background

In modern radar systems and communication systems, because of the transmission and reception of electromagnetic waves, a circulator is usually adopted to realize the unidirectional transmission of electromagnetic signals, so that a system with separate transmitting and receiving can share one set of antenna device, thereby greatly reducing the cost and volume of the system. The existing microstrip circulator with the frequency of 6-18 Ghz has the problems of high process requirement, high cost, high price, high debugging difficulty and the like in relative bandwidth design.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a 6Ghz-15Ghz composite ferrite microstrip circulator so as to solve the problems mentioned above.

In order to solve the technical problem, the utility model provides a 6Ghz-15Ghz composite ferrite microstrip circulator, which comprises a substrate and a circulator circuit printed on the substrate; the substrate comprises a low magnetic moment substrate and a high magnetic moment substrate nested at the inner side of the low magnetic moment substrate, the middle position of the circuit is printed on the high magnetic moment substrate, and the peripheral position of the circuit is printed on the low magnetic moment substrate.

Furthermore, the circuit adopts a disc double-Y structure, a small Y junction is additionally arranged on the basis of a large Y junction, and the Y arm of the small Y junction is used as a lambda/4 open line.

Further, the large Y-junction is matched with impedance transformation of different wavelengths through three-stage arrangement, and the width of each stage is gradually reduced from the center to the port.

Furthermore, two Y arms of the large Y-shaped knot are arranged in an inward bent arc shape, and the two Y arms are in a horn shape.

Furthermore, the magnetic field intensity of the low moment substrate is 1500Gs-2500Gs, and the magnetic field intensity of the high moment substrate is 3000Gs-4000 Gs.

Furthermore, the back plate of the high-magnetic-moment substrate at the inner side of the low-magnetic-moment substrate is welded on the bottom plate, and the bottom plate is a pure iron bottom plate.

The utility model has the beneficial effects that: the middle substrate of the circuit of the 6Ghz-15Ghz composite ferrite micro-strip circulator selects a high magnetic moment substrate, and the periphery of the circuit selects a low magnetic moment substrate; and a double-Y-junction circuit design is adopted, a small Y junction is added on the basis of a large Y, an impedance technology is added in the junction, and a Y arm of the small Y junction is used as a lambda/4 open circuit and is mutually offset with reactance of port impedance, so that the port impedance is pure resistance, impedance matching can be realized in a broadband by adjusting the length and the width of the small Y junction, and simultaneously impedance transformation of different wavelengths is matched through three-stage setting. The 6Ghz-15Ghz composite ferrite microstrip circulator has the advantages of wide working frequency band, small volume, simple process, small debugging difficulty and excellent performance.

Drawings

FIG. 1 is a schematic structural diagram of a 6Ghz-15Ghz composite ferrite microstrip circulator.

FIG. 2 is a schematic diagram of the structure of the circuit of the 6Ghz-15Ghz composite ferrite microstrip circulator.

FIG. 3 is a schematic top view of a 6Ghz-15Ghz composite ferrite microstrip circulator.

Wherein: 1. a substrate; 11. a low magnetic moment substrate; 12. a high moment substrate; 2. a circuit; 21. a large Y-junction; 22. a small Y-junction; 3. a base plate; 4. a ceramic plate; 5. a cobaltosic permanent magnet; 6. a first stage; 7. a second stage; 8. and a third stage.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiment is only one embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments, and for the sake of simplicity, the following contents omit technical common knowledge known to those skilled in the art.

As shown in fig. 1 to 3, the 6Ghz-15Ghz composite ferrite microstrip circulator includes a substrate 1 and a circulator circuit 2 printed on the substrate 1.

In the present application, the substrate 1 includes a low moment substrate 11 and a high moment substrate 12, wherein the high moment substrate 12 is nested inside the low moment substrate 11. Namely, a mounting groove is dug in the center of the low magnetic moment substrate 11, and the high magnetic moment substrate 12 is arranged in the mounting groove.

Specifically, the central position of the circuit 2 is printed on the high moment substrate 12, and the peripheral position of the circuit 2 is printed on the low moment substrate 11. It is preferable that the magnetic field strength of the low moment substrate 11 is 1500Gs to 2500Gs and the magnetic field strength of the high moment substrate 12 is 3000Gs to 4000 Gs.

The middle substrate 1 of the circuit 2 is a high magnetic moment substrate 12, preferably a high dielectric ferrite material, and the periphery of the circuit 2 is a low magnetic moment substrate 11, preferably a low dielectric ferrite material.

The circuit 2 of the 6Ghz-15Ghz composite ferrite microstrip circulator adopts a disc double-Y structure, a small Y junction 22 is additionally arranged on the basis of a large Y junction 21, the center of the large Y junction 21 is coincided with the center of the small Y junction 22, and three Y arms of the large Y junction 21 and three Y arms of the small Y junction 22 are distributed in a staggered mode and form an included angle of 60 degrees with each other.

The 6Ghz-15Ghz composite ferrite micro-strip circulator adopts a junction internal impedance technology, and a Y arm of a small Y junction 22 is used as a lambda/4 open-circuit line and mutually offsets with the reactance of port impedance, so that the port impedance is pure resistance; impedance matching can be achieved over a wide frequency range by adjusting the length and width of the small Y-junction 22.

Of course, it is also preferable that the small Y-junctions 22 be printed entirely on the high moment substrate 12, and the large Y-junctions 21 be printed at the central position on the high moment substrate 12 and at the peripheral position on the low moment substrate 11.

In the present application, as a preferred embodiment, the large Y junction 21 of the 6Ghz-15Ghz composite ferrite microstrip circulator is configured by three stages to match impedance transformation of different wavelengths, and the three-stage configuration thereof means that the Y arm of the large Y junction 21 is configured as stages corresponding to different widths; and the width of each stage gradually decreases from the center to the port, i.e. the width of the first stage 6 is greater than the width of the second stage 7, and the width of the second stage 7 is greater than the width of the third stage 8.

In the specific implementation, through the structural design, the space is efficiently utilized, the structure is compact, and the circulator is more miniaturized.

The back plate of the high-moment substrate 12 inside the low-moment substrate 11 of the 6Ghz-15Ghz composite ferrite micro-strip circulator is welded on the bottom plate 3, and the bottom plate 3 can be a pure iron bottom plate 3.

In actual operation, the circulator circuit 2 is printed on the low moment substrate 11 and the high moment substrate 12, wherein the central position of the circulator circuit 2 is printed on the high moment substrate 12, and the peripheral position of the circulator circuit 2 is printed on the low moment substrate 11. And welding the low-magnetic-moment substrate 11 and the high-magnetic-moment substrate 12 on the pure iron bottom plate 3 by using soldering paste, bonding the ceramic plate 4 on the low-magnetic-moment substrate 11 and the high-magnetic-moment substrate 12, covering the high-magnetic-moment substrate 12 and part of the low-magnetic-moment substrate 11 by using the ceramic plate 4, and bonding the tricobalt permanent magnet 5 on the ceramic plate 4. The circulator is installed in the TR system, and three ports P1, P2, and P3 of the circuit 2 are connected to the positions of the transmitting terminal, the antenna, and the receiving terminal in the TR system, respectively.

The 6Ghz-15Ghz composite ferrite micro-strip circulator selects a high magnetic moment substrate 12 as a substrate 1 in the middle of a circuit 2, and selects a low magnetic moment substrate 11 at the periphery of the circuit 2; and adopt the design of the double Y junction circuit 2, add the small Y junction 22 on the basis of big Y, adopt and add the impedance technology in the junction, the small Y junction 22Y arm is regarded as the lambda/4 open circuit, offset each other with the reactance of the port impedance, make the port impedance be the pure resistance, and can realize the impedance matching in the broadband through regulating the length and width of the small Y junction 22, set up in order to match the impedance transformation of different wavelength through the third grade at the same time. The 6Ghz-15Ghz composite ferrite microstrip circulator has the advantages of wide working frequency band, small volume, simple process, small debugging difficulty and excellent performance.

In the description above, references to "one embodiment," "an embodiment," "one example," "an example," etc., indicate that the embodiment or example so described may include a particular feature, structure, characteristic, property, element, or limitation, but every embodiment or example does not necessarily include the particular feature, structure, characteristic, property, element, or limitation. Moreover, repeated use of the phrase "in accordance with an embodiment of the present application" although it may possibly refer to the same embodiment, does not necessarily refer to the same embodiment.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A6 Ghz-15Ghz composite ferrite microstrip circulator comprises a substrate (1) and a circulator circuit (2) printed on the substrate (1); the method is characterized in that: the substrate (1) comprises a low magnetic moment substrate (11) and a high magnetic moment substrate (12) embedded on the inner side of the low magnetic moment substrate (11), the middle position of the circuit (2) is printed on the high magnetic moment substrate (12), and the peripheral position of the circuit (2) is printed on the low magnetic moment substrate (11).

2. The 6Ghz-15Ghz composite ferrite microstrip circulator of claim 1, wherein: the circuit (2) adopts a disc double-Y structure, a small Y junction (22) is additionally arranged on the basis of a large Y junction (21), and a Y arm of the small Y junction (22) is used as a lambda/4 open line.

3. The 6Ghz-15Ghz composite ferrite microstrip circulator of claim 2 wherein: the large Y-junction (21) is matched with impedance transformation of different wavelengths through three-stage arrangement, and the width of each stage is gradually reduced from the center to the port.

4. The 6Ghz-15Ghz composite ferrite microstrip circulator of claim 2 wherein: two Y arms of the large Y-shaped knot (21) are arranged in an inward bent arc shape and are in a horn shape.

5. The 6Ghz-15Ghz composite ferrite microstrip circulator of claim 1, wherein: the magnetic field intensity of the low-moment substrate (11) is 1500Gs-2500Gs, and the magnetic field intensity of the high-moment substrate (12) is 3000Gs-4000 Gs.

6. The 6Ghz-15Ghz composite ferrite microstrip circulator of claim 1, wherein: the back plate of the high-magnetic-moment substrate (12) at the inner side of the low-magnetic-moment substrate (11) is welded on the bottom plate (3), and the bottom plate (3) is a pure iron bottom plate.