A composite junction ferrite circulator

Abstract

The present invention discloses a composite junction ferrite circulator, which relates to the field of communication technology, and comprises an upper permanent magnet ring, an upper cavity, an upper ferrite ring, a central conductor, a lower ferrite ring, a lower cavity, and a lower permanent magnet ring; the central conductor is centered, and an upper ferrite ring and a lower ferrite ring are respectively arranged above and below the central conductor, and the central conductor, the upper ferrite ring, and the lower ferrite ring form a composite ferrite junction; the upper cavity and the lower cavity together constitute a circulator cavity, and the upper cavity and the lower cavity each have a circular groove inside, which are respectively used to place the upper ferrite ring and the upper ferrite ring; the lower cavity is provided with three rectangular grooves from the circular groove to the outside, which form three conductive signal transmission ports of the circulator with the central conductor; the present invention uses a composite ferrite junction to double the isolation of the circulator. It overcomes the problem that the existing circulator uses a single ferrite junction and has a low isolation.

Description

Technical Field

[0001] The invention belongs to the field of communication technology, and in particular relates to a composite junction ferrite circulator. Background Art

[0002] The circulators currently used in the field of microwave communications are all implemented using a single ferrite junction, and the typical value of the isolation between any two ports is 20dB. In microwave communications, the circulator is a key component, with one port connected to the transmitter, two ports connected to the antenna, and three ports connected to the receiver. The transmitter sends a signal, which is transmitted from the two ports of the circulator to the antenna. The received signal is transmitted from the antenna to the three ports through the two ports and enters the receiver, thus completing the transmission and reception of the signal.

[0003] In microwave communications, it is generally required that the isolation between the receiver and the antenna, the antenna and the transmitter, and the transmitter and the receiver be as large as possible to prevent mutual interference between the transmitted signal and the received signal. However, since the existing circulator uses a single ferrite junction, its typical isolation value is 20dB, which cannot completely eliminate the interference between the transmitted signal and the received signal, affecting the communication quality. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a composite junction ferrite circulator in response to the deficiencies in the background technology, which overcomes the problem that the existing circulator uses a single ferrite junction and has a low isolation. The present invention uses a composite ferrite junction to increase the isolation of the circulator exponentially, thus overcoming the problem that the existing circulator uses a single ferrite junction and has a low isolation.

[0005] The present invention adopts the following technical solutions to solve the above technical problems:

[0006] A composite junction ferrite circulator comprises an upper permanent magnet ring, an upper cavity, an upper ferrite ring, a central conductor, a lower ferrite ring, a lower cavity, and a lower permanent magnet ring;

[0007] The central conductor is centered, and an upper ferrite ring is provided on the upper and lower parts of the central conductor.

[0008] The lower ferrite ring, the central conductor, the upper ferrite ring and the lower ferrite ring form a composite ferrite junction;

[0009] The upper cavity and the lower cavity together form a circulator cavity, and each of the upper cavity and the lower cavity has a circular groove inside, which is used to place the upper ferrite ring and the lower ferrite ring respectively;

[0010] The lower cavity is provided with three rectangular grooves extending outward from the circular groove, which together with the central conductor form three signal transmission ports of the circulator.

[0011] As a further preferred embodiment of the composite ferrite circulator of the present invention, the composite ferrite junction is placed in a circulator cavity to provide an external magnetic field to the composite ferrite junction.

[0012] As a further preferred embodiment of the composite junction ferrite circulator of the present invention, the composite ferrite junction central conductor is composed of three single junctions, including sub-junction A, sub-junction B, and sub-junction C.

[0013] As a further preferred embodiment of a composite junction ferrite circulator of the present invention, the sub-junction A comprises a central disk and three 120° rotationally symmetrical metal strips, wherein the strip A1 and the rectangular groove of the lower cavity constitute a port of the circulator; the other two strips A2 and A3 are respectively connected to the strips B1 and C corresponding to the sub-junction B and sub-junction C.

[0014] As a further preferred embodiment of the composite junction ferrite circulator of the present invention, the sub-junction B and the sub-junction C each have a thin strip and a rectangular groove of the cavity to form the other two ports of the circulator; the sub-junction B and the sub-junction C each have another thin strip connected to each other;

[0015] The three sub-junctions are connected to each other to form a composite junction central conductor.

[0016] Compared with the prior art, the present invention adopts the above technical solution and has the following technical effects:

[0017] 1. A composite ferrite circulator of the present invention uses a composite ferrite junction. Because the composite ferrite junction is used, the isolation of microwave signals during reverse transmission in the circulator is doubled compared to that of ordinary circulators. The typical isolation value of ordinary circulators is -20Db, while the typical isolation value of the circulator of the present invention is -40Db.

[0018] 2. The present invention is a composite ferrite circulator, in which the ferrite and permanent magnet used are both in a ring shape, rather than the disc shape used in ordinary circulators. The ring-shaped ferrite can reduce the weight of the circulator and effectively suppress high-frequency harmonics; the ring-shaped permanent magnet can reduce the weight of the circulator and make the external magnetic field it generates more uniform, thereby ensuring the uniform magnetization of the ferrite. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1It is a schematic diagram of the structure of the composite ferrite junction circulator of the present invention;

[0021] Figure 2 It is a schematic diagram of the central conductor of the composite ferrite junction circulator of the present invention.

[0022] The specific numbers in the figure are as follows: 1-upper permanent magnet ring, 2-upper cavity, 3-upper ferrite ring, 4-center conductor, 5-lower ferrite ring, 6-lower cavity, 7-lower permanent magnet ring. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings:

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] A composite ferrite circulator comprises an upper permanent magnet ring 1, an upper cavity 2,

[0026] Upper ferrite ring 3, central conductor 4, lower ferrite ring 5, lower cavity 6, lower permanent magnet ring 7;

[0027] The central conductor 4 is in the center, and an upper ferrite ring 3 and a lower ferrite ring 5 are respectively provided above and below the central conductor 4. The central conductor 4, the upper ferrite ring 3 and the lower ferrite ring 5 form a composite ferrite junction;

[0028] The upper cavity 2 and the lower cavity 6 together constitute a circulator cavity, and each of the upper cavity 2 and the lower cavity 6 has a circular groove inside, which is used to place the upper ferrite ring 3 and the lower ferrite ring 3 respectively;

[0029] The lower cavity 6 is provided with three rectangular grooves extending outward from the circular groove, which together with the central conductor 4 form three signal transmission ports of the circulator.

[0030] The composite ferrite junction is placed in the circulator cavity and is used to provide an external magnetic field to the composite ferrite junction.

[0031] The composite ferrite junction center conductor is composed of three single junctions, including sub-junctions A,

[0032] Sub-knot B, sub-knot C.

[0033] The sub-node A comprises a central disk and three 120° rotationally symmetrical metal thin strips, wherein the thin strip A1 and the rectangular groove of the lower cavity form a port of the circulator;

[0034] The other two thin strips A2 and A3 are connected to the thin strips B1 and C corresponding to the sub-nodes B and C respectively.

[0035] Connected.

[0036] The sub-junction B and the sub-junction C each have a thin strip and the rectangular slot of the cavity to form the other two ports of the circulator; the sub-junction B and the sub-junction C each have another thin strip connected to each other; the three sub-junctions are connected to each other to form a composite junction central conductor.

[0037] The specific working process and principle of this product are explained with the attached drawings:

[0038] The present invention is a circulator using a composite ferrite junction. A microwave signal enters the circulator from port A1. In sub-junction A, due to the tensor magnetic permeability of the ferrite ring, a gyromagnetic effect occurs under the action of a static magnetic field generated by a permanent magnet ring outside the cavity. The microwave signal rotates 120° in sub-junction A and is transmitted from A2 to the B1 end of sub-junction B. Similarly, a gyromagnetic effect occurs inside sub-junction B, rotates 120°, and is output from the B2 end.

[0039] When a microwave signal is input from B2, it will be output from C3, and the microwave signal input from C3 will be output from A1, thus realizing the microwave signal circulation function of the circulator, that is, A1→B2→C3→A1.

[0040] At the same time, when the microwave signal is transmitted from A1 to B2 via sub-junctions A and B, there is no microwave signal transmission between A1 and C3, thus achieving isolation between A1 and C3. Therefore, when the microwave signal realizes the circulation function in the circulator, it must have the isolation function in the opposite direction, that is, the microwave signal is isolated between B2 and A1, C3 and B2, and A1 and C3.

[0041] The present invention uses a composite ferrite junction. Because the composite ferrite junction is used, the isolation of the microwave signal during reverse transmission therein is doubled compared to that of an ordinary circulator. The typical isolation value of an ordinary circulator is -20Db, while the typical isolation value of the circulator of the present invention is -40Db.

[0042] The ferrite and permanent magnet used in the present invention both adopt a ring-shaped structure, rather than a disc-shaped structure used in ordinary circulators. The ring-shaped ferrite can reduce the weight of the circulator and effectively suppress high-frequency harmonics; the ring-shaped permanent magnet can reduce the weight of the circulator and make the external magnetic field generated by it more uniform, thereby ensuring the uniform magnetization of the ferrite.

[0043] All technical features in this embodiment can be freely combined according to actual needs.

[0044] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A composite ferrite circulator, characterized in that: It comprises an upper permanent magnet ring (1), an upper cavity (2), an upper ferrite ring (3), a central conductor (4), a lower ferrite ring (5), a lower cavity (6), and a lower permanent magnet ring (7); The central conductor (4) is centered, and an upper ferrite ring (3) and a lower ferrite ring (5) are respectively provided above and below the central conductor (4). The central conductor (4) and the upper ferrite ring (3) and the lower ferrite ring (5) form a composite ferrite junction; the upper cavity (2) and the lower cavity (6) together form a circulator cavity, and each of the upper cavity (2) and the lower cavity (6) has a circular groove inside, which is used to place the upper ferrite ring (3) and the upper ferrite ring (3) respectively; the lower cavity (6) is provided with three rectangular grooves from the circular groove to the outside, and together with the central conductor (4) form three signal transmission ports of the circulator; the composite ferrite junction is placed in the circulator cavity, and is used to provide an external magnetic field to the composite ferrite junction; the central conductor is composed of three single junctions, including sub-junction A, sub-junction B, and sub-junction C; the sub-junction A includes a central disk and three 120° rotationally symmetrical metal strips, wherein the strip A1 Together with the rectangular groove of the lower cavity, it forms a port of the circulator; the other two thin strips A2 and A3 are connected to the thin strips B1 and C1 corresponding to the sub-node B and sub-node C respectively; The sub-junction B and sub-junction C each have a thin strip and the rectangular slot of the cavity to form the other two ports of the circulator; the sub-junction B and sub-junction C each have another thin strip connected to each other; the three sub-junctions are connected to each other to form a composite junction central conductor.

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