CN217788763U

CN217788763U - Ultra-wideband circulator

Info

Publication number: CN217788763U
Application number: CN202222045945.8U
Authority: CN
Inventors: 倪全林
Original assignee: Nanjing Bangwei Electronic Technology Co ltd
Current assignee: Nanjing Bangwei Electronic Technology Co ltd
Priority date: 2022-08-04
Filing date: 2022-08-04
Publication date: 2022-11-11
Anticipated expiration: 2032-08-04

Abstract

The utility model provides an ultra-wideband circulator, which comprises an upper shell and a lower shell, a cavity wall for separating the inner cavity of the upper shell and the lower shell into an upper cylindrical groove and a lower cylindrical groove, and a ferrite assembly arranged in the upper cylindrical groove and used for transmitting electromagnetic waves; permanent magnet sheets installed inside the lower cylindrical groove and used for maintaining a uniform and constant magnetic field; the ferrite assembly comprises two groups of microwave ferrites which are respectively arranged in the upper cylindrical groove and used for generating gyromagnetic characteristics; the conductor sheet is arranged between the two groups of microwave ferrites and is used for communicating and transmitting electromagnetic waves; the cover is located the microwave ferrite outside of location and is used for installing the microwave medium ring on last shells inner wall, the utility model discloses ultra wide band circulator compares with prior art, and it is little to have the loss, the high power, and high temperature stability, and the device wholeness can be good, can easily characteristics such as batch production manufacturing and integrated manufacturing are applicable to radar communication, among electronic countermeasure and the anti-interference microwave system.

Description

Ultra-wideband circulator

Technical Field

The utility model relates to a circulator technical field, concretely relates to ultra wide band circulator.

Background

A circulator is a multi-port device in which the transmission of electromagnetic waves can only circulate in a single direction, with isolation in the opposite direction. Devices with unidirectional ring characteristics are used in modern radar and microwave multi-path communication systems; for example, a circulator is commonly used as a duplexer in a radar system in which a transceiver device shares a pair of antennas, signals with different frequencies can be separated by the circulator in a microwave multi-path communication system, and the microwave ferrite circulator is mainly applied to the microwave system and plays roles of isolation, circulation, duplexing, protection and improvement of matching of standing waves;

however, the existing circulator is applied to radar communication, electronic countermeasure and anti-interference microwave systems, and has the problems of poor performance index, large loss, small bandwidth, small power, poor temperature stability and the like.

SUMMERY OF THE UTILITY MODEL

In view of the above shortcomings of the prior art, an object of the present invention is to provide an ultra-wideband circulator, which is used for solving the problems of large loss, small bandwidth, small power and poor temperature stability in the prior art.

An ultra-wideband circulator comprises an upper shell, a lower shell, a cavity wall for dividing the inner cavity of the upper shell and the lower shell into an upper cylindrical groove and a lower cylindrical groove, and a ferrite assembly arranged in the upper cylindrical groove and used for transmitting electromagnetic waves; the permanent magnet sheets are arranged in the lower cylindrical groove and used for keeping a uniform and constant magnetic field;

the ferrite assembly comprises two groups of microwave ferrites which are respectively arranged in the upper cylindrical groove and used for generating gyromagnetic characteristics; the conductor sheet is arranged between the two groups of microwave ferrites and is used for communicating and transmitting electromagnetic waves; the microwave dielectric ring is sleeved outside the positioning microwave ferrite and is arranged on the inner wall of the upper shell.

As an optimal scheme of the utility model, still including installing in the conductor upper surface and being used for restraining microwave ferrite the polytetrafluoroethylene film that resonance front appears.

As a preferred scheme of the utility model, still include first apron and second apron, first apron is placed in the first end top of last casing, the second apron is placed in the second end bottom of casing down, go up casing and lower casing fixed mounting each other.

As a preferred scheme of the utility model, still including installing the polytetrafluoroethylene medium piece of port in the second end lateral wall of casing.

As an optimized scheme of the utility model, the port has been seted up on the conductor, and the port department installs the lead-out wire.

As a preferred scheme of the present invention, the permanent magnet sheet is a strontium calcium permanent magnet sheet.

As an optimized proposal of the utility model, the size of the upper cylindrical groove and the lower cylindrical groove is 25mm to 26mm.

As a preferred embodiment of the present invention, the microwave ferrite is made of garnet doped material.

The utility model has the advantages that:

microwave ferrite adopts garnet to add miscellaneous material in this scheme, adopts the combination mode of two microwave ferrites and conductor piece, reduces the method in normalization magnetic field and reduces the loss and improve temperature stability, increases and adds the polytetrafluoroethylene film and has played stable field structure and reduce high order membrane and reduce the loss effect, through improving, inserts the loss index and be 0.8DB, -40- +70 ℃ down and insert the loss index and be 1.20DB, the utility model discloses ultra wide band circulator compares with prior art, has that the loss is little, the high power, high temperature stability, and device wholeness can be good, but characteristics such as easy batch production manufacturing and integrated manufacturing are applicable to radar communication, in electronic countermeasure and the anti-interference microwave system.

Drawings

Fig. 1 is a schematic diagram of an internal structure of an ultra-wideband circulator;

FIG. 2 is a schematic diagram of a ferrite assembly;

fig. 3 is a schematic diagram of an external structure of an ultra-wideband circulator.

In the figure: 1-an upper shell; 11-a lower housing; 2-a ferrite composite; 3-permanent magnetic sheet; 4-microwave ferrite; 5-a conductor sheet; 6-microwave dielectric ring; 7-a polytetrafluoroethylene film; 8-a first cover plate; 9-second cover plate.

Detailed Description

The following description is given for illustrative embodiments of the present invention, and other advantages and effects of the present invention will be apparent to those skilled in the art from the disclosure of the present invention.

Referring to fig. 1 to 3, it should be understood that the structures, ratios, sizes, etc. shown in the drawings attached to the present specification are only used for matching with the disclosure of the specification to be known and read by those skilled in the art, and are not used to limit the practical limitations of the present invention, so that they do not have the essential technical meaning, and any modifications of the structures, changes of the ratio relationship or adjustments of the sizes should still fall within the scope of the present invention without affecting the functions and the achievable objects of the present invention. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.

Referring to fig. 1, the present invention provides an ultra-wideband circulator, including: the magnetic field generating device comprises an upper shell 1, a lower shell 11, a cavity wall for dividing the inner cavity of the upper shell 1 and the lower shell 11 into an upper cylindrical groove and a lower cylindrical groove, a ferrite assembly 2 which is arranged in the upper cylindrical groove and used for transmitting electromagnetic waves, and a permanent magnet sheet 3 which is arranged in the lower cylindrical groove and used for keeping a uniform and constant magnetic field.

As shown in fig. 2-3, the ferrite assembly 2 includes two sets of microwave ferrites 4 respectively installed inside the upper cylindrical slot and used for generating gyromagnetic characteristics; a conductor sheet 5 which is arranged between the two groups of microwave ferrites 4 and is used for communicating and transmitting electromagnetic waves; and the microwave dielectric ring 6 is sleeved outside the microwave ferrite 4 and used for positioning and mounting the microwave ferrite 4 on the inner wall of the upper shell 1.

Specifically, the microwave ferrite 4 generates gyromagnetic characteristics under the combined action of the external magnetic field and the microwave field, the microwave ferrite 4 has tensor permeability characteristics, and the gyromagnetic characteristics enable the polarization rotation (faraday effect) of electromagnetic waves propagating in the microwave ferrite 4 and the strong absorption (ferromagnetic resonance) of electromagnetic wave energy, so that the attenuation of electromagnetic waves transmitted in the forward direction of a circulator made of the microwave ferrite 4 is very small, the reverse electromagnetic waves are strongly absorbed, the conductor sheet 5 plays a role in the transmission of the circulator, the Y-shaped central conductor is arranged between the two pieces of microwave ferrite 4 to form a sample junction, and the microwave dielectric ring 6 is used for positioning the microwave ferrite 4 inside the upper cylindrical groove.

In this embodiment, the microwave ferrite further comprises a teflon film 7 mounted on the upper surface of the conductor strip 5 for suppressing the resonance front of the microwave ferrite 4. Specifically, when the circulator is powered on, the microwave ferrite 4 in the circulator generates nonlinear magnetization characteristics, the circulator generates a resonance peak, and the polytetrafluoroethylene film 7 can inhibit and reduce the resonance peak.

Still include first apron 8 and second apron 9, first apron 8 is placed in the first end top of upper housing 1, second apron 9 is placed in the second end bottom of lower casing 11, upper housing 1 and lower casing 11 fixed mounting each other, upper housing 1 and lower casing 11 are fixed through the cooperation of first apron 8 and second apron 9.

In this embodiment, the module further includes a teflon dielectric block mounted on the inner wall of the lower housing 11.

Specifically, the polytetrafluoroethylene dielectric block is used for playing a role in impedance matching of the standing wave port.

In this embodiment, the conductor piece is provided with a port, and an outgoing line is installed at the port.

Specifically, the outgoing line is used for being externally connected with the radio frequency connector.

The permanent magnetic sheet 3 is a strontium calcium permanent magnetic sheet 3.

Specifically, the strontium calcium permanent magnetic sheet 3 is used for generating a uniform and constant magnetic field.

In this embodiment, the diameter of the upper cylindrical groove and the diameter of the lower cylindrical groove are 25mm to 26mm.

The microwave ferrite 4 is made of garnet doped material, which can reduce the loss of the circulator and improve the temperature stability of the circulator.

To sum up, the utility model provides an ultra wide band circulator, microwave ferrite 4 produces the gyromagnetic characteristic under the combined action of external magnetic field and microwave field, have tensor permeability characteristic, it makes the rotation (faraday effect) that the electromagnetic wave that propagates in the ferrite takes place polarization just to this gyromagnetic characteristic, and electromagnetic wave energy strong absorption (ferromagnetic resonance), the decay is very little when circulator forward transmission electromagnetic wave made with microwave ferrite 4, reverse electromagnetic wave is by strong absorption, conductor sheet 5 has played the transmission effect of circulator, Y shape central conductor arranges the constitution sample knot between two microwave ferrite 4 in, microwave dielectric ring 6 is used for fixing a position microwave ferrite 4 inside last cylindrical column groove, and microwave ferrite 4 adopts garnet to add miscellaneous material, adopt the combination mode of two microwave ferrite 4 and conductor sheet 5, the method that reduces the normalization magnetic field reduces the loss of circulator and improves temperature stability, increase polytetrafluoroethylene film 7 and restrain and reduce the resonance peak, has played and has maintained high order circulator stable field structure and has reduced the membrane and has reduced the loss effect.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. An ultra-wideband circulator is characterized by comprising an upper shell, a lower shell, a cavity wall for separating an inner cavity of the upper shell from an inner cavity of the lower shell into an upper cylindrical groove and a lower cylindrical groove, and a ferrite assembly arranged in the upper cylindrical groove and used for transmitting electromagnetic waves; the permanent magnet sheets are arranged in the lower cylindrical groove and used for keeping a uniform and constant magnetic field;

the ferrite assembly comprises two groups of microwave ferrites which are respectively arranged in the upper cylindrical groove and used for generating gyromagnetic characteristics; the conductor sheet is arranged between the two groups of microwave ferrites and is used for communicating and transmitting electromagnetic waves; and the microwave dielectric ring is sleeved outside the microwave ferrite and used for positioning and installing the microwave ferrite on the inner wall of the upper shell.

2. The ultra-wideband circulator of claim 1, further comprising a teflon film mounted on an upper surface of the conductor plate for suppressing a resonance front of the microwave ferrite.

3. The ultra-wideband circulator of claim 1, further comprising a first cover plate and a second cover plate, wherein the first cover plate is disposed on top of the first end of the upper housing, the second cover plate is disposed on bottom of the second end of the lower housing, the upper housing and the lower housing are fixedly mounted to each other, and the upper housing and the lower housing are fixed to each other by the first cover plate and the second cover plate.

4. The ultra-wideband circulator of claim 1, further comprising a block of teflon dielectric mounted to an inner wall of the lower housing.

5. The ultra-wideband circulator of claim 1, wherein the conductor plate is ported with an outlet lead mounted thereto.

6. The ultra-wideband circulator of claim 1, wherein said permanent magnet slab is a strontium calcium permanent magnet slab.

7. The ultra-wideband circulator of claim 1, wherein the diameter of the upper cylindrical recess and the diameter of the lower cylindrical recess are between 25mm and 26mm.

8. The ultra-wideband circulator of claim 1, wherein said microwave ferrite is made of garnet doped material.