Millimeter wave magnetic shielding type coaxial isolator

Abstract

The utility model discloses a millimeter wave magnetic shielding type coaxial isolator, which comprises a cavity and a mounting flange, the cavity comprises an upper cavity and a lower cavity, an inner conductor is arranged in the cavity between the upper cavity and the lower cavity, a first dielectric ring and a first gyromagnetic ferrite are sequentially arranged below the inner conductor from top to bottom, and a second dielectric ring and a second gyromagnetic ferrite are sequentially arranged below the first dielectric ring and the second gyromagnetic ferrite from top to bottom. A second dielectric ring and a second gyromagnetic ferrite are sequentially arranged above the inner conductor from bottom to top, a first permanent magnet and a second permanent magnet are correspondingly mounted in the circular cavity of the lower cavity and the circular cavity of the upper cavity, a fixing hole is formed in the middle of the mounting flange, and the upper cavity and the lower cavity are both fixed in the fixing hole; according to the utility model, interference of external electromagnetic waves on the isolator can be effectively shielded, and signal leakage can be effectively reduced, so that the working efficiency of the isolator in a millimeter wave frequency band is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to microwave communication technical field, specifically is a millimeter wave magnetic shielding formula coaxial isolator. BACKGROUND

[0002] With the application of millimeter wave device in military radar, electronic countermeasure, satellite communication, remote control, telemetry and other aspects is more and more extensive, the working environment around the whole machine is also more and more complex, therefore the reliability requirement of radio frequency isolator circulator is also more and more high, and the existing coaxial isolator structure processing consumable is big, and the working magnetic field is low, and the magnetic circuit is not completely closed, and the magnetic flux leakage is big, and the magnetic circuit efficiency is low. CONTENT OF UTILITY MODEL

[0003] In order to solve the problems of prior art, the utility model provides a millimeter wave magnetic shielding formula coaxial isolator, can effectively shield the interference of outside electromagnetic wave to isolator, effectively reduce signal leakage simultaneously, thereby improve the working efficiency of isolator in millimeter wave frequency band.

[0004] In order to realize the above purpose, the utility model adopts the following technical scheme:

[0005] A kind of millimeter wave magnetic shielding formula coaxial isolator, including cavity and mounting flange, the cavity includes upper cavity and lower cavity, inner conductor is arranged in the cavity between the upper cavity and lower cavity, located the lower of the inner conductor, and first dielectric ring, first spin-magnetic ferrite are sequentially arranged from top to bottom, located the upper of the inner conductor, and second dielectric ring and second spin-magnetic ferrite are sequentially arranged from bottom to top, and the first spin-magnetic ferrite and second spin-magnetic ferrite are embedded in the first dielectric ring and second dielectric ring hole slot respectively;

[0006] First permanent magnet and second permanent magnet are correspondingly installed in the round cavity of the lower cavity and upper cavity, the upper cavity top is provided with magnetic shielding clip, the magnetic shielding clip is installed from the upper cavity top to down, the lower cavity bottom is installed with lower baffle;

[0007] Fixed hole is installed in the middle of the mounting flange, the upper cavity and lower cavity are fixed in the fixed hole, and the mounting flange is fixedly connected with the magnetic shielding clip, lower baffle, upper cavity and lower cavity by screw.

[0008] The utility model further limits technical scheme:

[0009] Further, the magnetic shielding clip is of U-shaped structure.

[0010] Further, the magnetic shielding clip and lower baffle are made of high-permeability steel material.

[0011] Further, the inner conductor has three lead-out lines, two of which are connected to the first and second connectors respectively, and the upper and lower ends of the first and second connectors are fixed on the upper and lower cavities by screws respectively, and the other lead-out line of the inner conductor is fixed by absorbing load.

[0012] Further, the first and second connectors are both 2.92mm radio frequency connectors.

[0013] Further, the first and second dielectric rings are both one-piece structures, which can fix the spin magnetic ferrite and compress the inner conductor.

[0014] Compared with the prior art, the technical scheme of the utility model has the advantages that:

[0015] (1) The cavity of the utility model is divided into two cavities, which is convenient for the installation of internal parts, the magnetic shielding clip and the lower baffle are made of steel material with high magnetic permeability, and are installed on the upper and lower cavities to form a complete magnetic loop, which can effectively prevent external electromagnetic wave interference and reduce signal leakage, thereby improving the working efficiency of the isolator in the millimeter wave frequency band.

[0016] (2) The connector of the utility model is a 2.92mm radio frequency connector, which has the advantages of low insertion loss, low reflection loss and high signal transmission efficiency, is suitable for high-frequency radio frequency signal transmission, can reach a frequency of 40GHz or higher, and the standard impedance of the connector is 50Ω, which can match the impedance of various radio frequency devices and cables. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural diagram of the utility model;

[0018] Figure 2 is a structural exploded view of the utility model;

[0019] In the figure: 1 lower cavity, 2 upper cavity, 3 inner conductor, 4a first spin magnetic ferrite, 4b second spin magnetic ferrite, 5a first dielectric ring, 5b second dielectric ring, 6a first permanent magnet, 6b second permanent magnet, 7a first absorbing load, 7b second absorbing load, 8 magnetic shielding clip, 9 lower baffle, 10a first connector, 10b second connector, 11 mounting flange. DETAILED DESCRIPTION EMBODIMENT

[0020] In order to make the utility model more clear and understandable, the X-band high-isolation five-section strip-line isolator of the utility model will be further described below in combination with the drawings, and the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model.

[0021] Referring to Figure 1 and Figure 2 A millimeter wave magnetic shielding coaxial isolator comprises a cavity and a mounting flange 11, the cavity comprises an upper cavity 2 and a lower cavity 1, an inner conductor 3 is arranged in the cavity between the upper cavity 2 and the lower cavity 1, a first magnetic ring 5a and a first spin-magnetic ferrite 4a are arranged below the inner conductor 3 in sequence from top to bottom, a second magnetic ring 5b and a second spin-magnetic ferrite 4b are arranged above the inner conductor 3 in sequence from bottom to top, the first magnetic ring and the second magnetic ring are both one-piece structures, and the first spin-magnetic ferrite 4a and the second spin-magnetic ferrite 4b are respectively embedded in the holes and grooves of the first magnetic ring 5a and the second magnetic ring 5b;

[0022] A first permanent magnet 6a and a second permanent magnet 6b are correspondingly arranged in the circular cavities of the lower cavity 1 and the upper cavity 2, a U-shaped magnetic shielding clip 8 is arranged on the top of the upper cavity 2, and a lower baffle 9 is arranged on the bottom of the lower cavity 1; the magnetic shielding clip and the lower baffle are made of steel material with high magnetic permeability;

[0023] The inner conductor 3 has three outgoing lines, two of which are respectively connected to a connector one 10a and a connector two 10b, both the connector one and the connector two are 2.92mm radio frequency connectors, and the upper and lower ends of the connector one 10a and the connector two 10b are respectively fixed on the two ends of the upper cavity 2 and the lower cavity 1 through screws, and the other outgoing line of the inner conductor is fixed in the lower cavity 1 through two upper and lower absorbing loads 7a, 7b;

[0024] A fixing hole is arranged in the middle of the mounting flange 11, and the upper and lower cavities are fixed in the fixing hole, and the mounting flange 11, the magnetic shielding clip 8 and the lower baffle 9 are fixedly connected with the upper cavity 2 and the lower cavity 1 through screws.

[0025] The cavity of the embodiment adopts a split cavity form, which is convenient for installing internal parts, the magnetic shielding clip and the lower baffle are made of steel material with high magnetic permeability, are arranged on the upper cavity and the lower cavity, and form a complete magnetic loop, which can effectively prevent external electromagnetic wave interference and reduce signal leakage, thereby improving the working efficiency of the isolator in the millimeter wave frequency band;

[0026] The connector of the embodiment is a 2.92mm radio frequency connector, which has the advantages of low insertion loss, low reflection loss and high signal transmission efficiency, is suitable for high-frequency radio frequency signal transmission, can reach a frequency of 40GHz or higher, and the standard impedance of the connector is 50Ω, which can match the impedance of various radio frequency devices and cables.

[0027] In addition to the above embodiments, the utility model can have other implementation manners. Any technical scheme formed by equivalent replacement or equivalent transformation falls within the protection scope required by the utility model.

Claims

1. A millimeter wave magnetic shielded coaxial isolator comprising a cavity and a mounting flange, characterized in that: The cavity includes an upper cavity and a lower cavity, an inner conductor is arranged in the cavity between the upper cavity and the lower cavity, a first dielectric ring (5a) and a first gyromagnetic ferrite (4a) are arranged below the inner conductor in sequence from top to bottom, a second dielectric ring (5b) and a second gyromagnetic ferrite (4b) are arranged above the inner conductor in sequence from bottom to top, and the first gyromagnetic ferrite (4a) and the second gyromagnetic ferrite (4b) are respectively embedded in the holes and grooves of the first dielectric ring (5a) and the second dielectric ring (5b); A first permanent magnet (6a) and a second permanent magnet (6b) are respectively arranged in the circular cavities of the lower cavity (1) and the upper cavity (2), a magnetic shielding clip (8) is arranged at the top of the upper cavity (2), the magnetic shielding clip (8) is arranged from top to bottom on the upper cavity (2), and a lower baffle (9) is arranged at the bottom of the lower cavity (1); A fixing hole is arranged in the middle of the mounting flange, the upper cavity and the lower cavity are fixed in the fixing hole, and the mounting flange (11), the magnetic shielding clip (8) and the lower baffle (9) are fixedly connected with the upper cavity (2) and the lower cavity (1) through screws.

2. A millimeter wave magnetic shielded coaxial isolator according to claim 1, characterized in that: The magnetic shielding clip (8) is in a U-shaped structure.

3. The millimeter wave magnetic shielded coaxial isolator of claim 1, wherein: The magnetic shielding clip (8) and the lower baffle (9) are made of a steel material with high magnetic permeability.

4. The millimeter wave magnetic shielded coaxial isolator of claim 1, wherein: The inner conductor (3) has three outgoing lines, two of which are respectively connected with a connector one (10a) and a connector two (10b), the upper and lower ends of the connector one (10a) and the connector two (10b) are respectively fixedly connected with the two ends of the upper cavity (2) and the lower cavity (1) through screws, and the other outgoing line of the inner conductor is fixedly connected through an absorption load (7a, 7b).

5. The millimeter wave magnetic shielded coaxial isolator of claim 4, wherein: The connector one (10a) and the connector two (10b) are both 2.92mm radio frequency connectors.

6. The millimeter wave magnetic shielded coaxial isolator of claim 1, wherein: The first dielectric ring (5a) and the second dielectric ring (5b) are both in a one-piece structure.

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