CN211980847U - Broadband three-port microstrip circulator - Google Patents

Broadband three-port microstrip circulator Download PDF

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CN211980847U
CN211980847U CN202020949465.2U CN202020949465U CN211980847U CN 211980847 U CN211980847 U CN 211980847U CN 202020949465 U CN202020949465 U CN 202020949465U CN 211980847 U CN211980847 U CN 211980847U
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broadband
permanent magnet
microstrip
circuit
tributaries
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蒋兰
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Nanjing Guangshun Electronic Technology Research Institute Co ltd
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Nanjing Guangshun Electronic Technology Research Institute Co ltd
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Abstract

The utility model relates to a broadband three-port microstrip circulator, include and follow supreme base, ferrite substrate, microstrip circuit, the permanent magnet of arranging in proper order down, set up ceramic pad between permanent magnet and the microstrip circuit, microstrip circuit is including the center knot that is the hexagon structure, the edge part of center knot is connected with three tributaries, and the contained angle between two adjacent tributaries is 120, connects the L/C circuit on every tributary. The utility model discloses a design of microstrip circuit structure, with the design of center knot for the hexagon, set up horizontal bar and fishbone form arch on a road, it is small to have, the frequency band is wide, the uniformity is good, the performance is excellent, simple structure, convenient to use.

Description

Broadband three-port microstrip circulator
Technical Field
The utility model relates to a circulator technical field, concretely relates to broadband three-port microstrip circulator.
Background
With the rapid development of microwave integration technology, the application of microwave electronic devices is becoming more and more extensive, and the demand for easy integration, miniaturization and broadband characteristics of circulators and isolators is increasing. The embedded circulator can not meet the requirements of a plurality of system patches basically, a broadband Y-node three-port microstrip circulator appears according to market requirements, the circulator can realize unidirectional circulation of microwave power, and the reverse direction is isolation. However, the existing circulator has large volume and narrow frequency.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems existing in the prior art, the utility model provides a broadband three-port microstrip circulator.
In order to achieve the above object, the utility model adopts the following technical scheme:
the utility model provides a three port microstrip circulator in broadband, includes from supreme base, ferrite substrate, microstrip circuit, the permanent magnet of arranging in proper order down, set up the ceramic pad between permanent magnet and the microstrip circuit, the microstrip circuit is including the center knot that is the hexagon structure, the edge part of center knot is connected with three tributaries, and the contained angle between two adjacent tributaries is 120, connects the L/C circuit on every tributary, and wherein outwards extend respectively on the lateral wall of two tributaries and on the both sides wall of another tributary has the horizontal bar, and wherein two tributaries buckle respectively 60 and use the center of center knot to form symmetrical structure as the symmetry center line, and the center knot edge part between two adjacent tributaries outwards extends has fishbone form protruding.
Preferably, the number of the fishbone-shaped bulges between two adjacent branches is two, the fishbone-shaped bulges are distributed in parallel, and the fishbone-shaped bulges are vertical to the central knot.
In any of the above embodiments, preferably, the cross bar is perpendicular to the connected branches.
In any of the above schemes, preferably, the ferrite substrate is fixed on the upper surface of the base, the microstrip circuit is fixed on the upper surface of the ferrite substrate, the ceramic gasket is glued on the microstrip circuit, and the permanent magnet is glued on the ceramic gasket.
In any of the above schemes, preferably, the center lines of the microstrip circuit center junction, the permanent magnet, and the ceramic spacer coincide.
In any of the above aspects, preferably, the permanent magnet is a samarium cobalt permanent magnet.
In any of the above embodiments, preferably, the ferrite substrate is made of a spinel material.
Compared with the prior art, the utility model provides a pair of three port microstrip circulators in broadband has following beneficial effect:
1. through the design of a micro-strip circuit structure, the central knot is designed into a hexagon, the volume is reduced, and the transverse strip and the fishbone-shaped bulge are arranged on the branch road, so that the micro-strip micro;
2. the central lines of the full-open structure, the base, the ferrite substrate, the ceramic gasket and the permanent magnet are on the same straight line, so that the installation is better. And the volume is reduced to the maximum extent, and the micro-assembly is convenient.
Drawings
Fig. 1 is a schematic overall structure diagram of a preferred embodiment of a broadband three-port microstrip circulator provided in the present invention;
FIG. 2 is an exploded view of the embodiment of FIG. 1;
fig. 3 is a schematic structural diagram of the microstrip circuit in the embodiment shown in the figure.
The figures are labeled as follows: 1. a base; 2. a ferrite substrate; 3. a microstrip circuit; 301. a central knot; 302. a first branch; 303. a second branch circuit; 304. a third branch; 305. fishbone-shaped bulges; 306. a horizontal bar; 307. an L/C circuit; 4. a ceramic gasket; 5. and a permanent magnet.
Detailed Description
In order to further understand the inventive content of the present invention, the present invention will be explained in detail with reference to the specific embodiments.
As shown in fig. 1-3, an embodiment of a broadband three-port microstrip circulator provided by the present invention comprises a base 1, a ferrite substrate 2, a microstrip circuit 3, and a permanent magnet 5 arranged in sequence from bottom to top, a ceramic gasket 4 is arranged between the permanent magnet 5 and the microstrip circuit 3, the microstrip circuit 3 comprises a central junction 301 in a hexagonal structure, the edge part of the central junction 301 is connected with three branches, the included angle between two adjacent branches is 120 degrees, each branch is connected with an L/C circuit 307, wherein, a lateral wall of the two branches and a lateral wall of the other branch extend outwards to form a horizontal bar 306, and two branches are respectively bent by 60 degrees to form a symmetrical structure by taking the center of the central knot 301 as a symmetrical center line, and fishbone-shaped bulges 305 extend outwards from the edge part of the central knot 301 between two adjacent branches. The ends of the three branches far away from the central junction 301 form ports of the microstrip circuit 3, the three branches form three ports, and any port is externally connected with an SMA load through a connector to test the electrical performance. The design of the structure of the microstrip circuit 3 not only ensures the performance of products, but also reduces the volume of the products, and the center junction adopts a hexagonal structure, thereby being beneficial to reducing the whole volume. The LC circuit has the effect of extending the operating bandwidth.
The number of the fishbone-shaped bulges 305 between two adjacent branches is two, the fishbone-shaped bulges 305 are distributed in parallel, the fishbone-shaped bulges 305 are perpendicular to the central knot 301, and the fishbone-shaped bulges 305 are used for matching with the L/C circuit 307.
The cross bar 306 remains perpendicular to the connected legs for performance tuning.
The ferrite substrate 2 is fixed on the upper surface of the base 1 through lead-free soldering paste welding, proper temperature needs to be added when the substrate and the base 1 are welded through the lead-free soldering paste, the micro-strip circuit 3 is fixed on the upper surface of the ferrite substrate 2 through a photoetching technology, the ceramic gasket 4 is glued on the micro-strip circuit 3, the permanent magnet 5 is glued on the ceramic gasket 4, and epoxy resin glue can be adopted in a gluing mode.
The base 1 is made of magnetic metal material, preferably iron or iron alloy, and has a silver-plated surface, and the lower surface of the ferrite substrate 2 is plated with gold.
The central lines of the central junction 301, the permanent magnet 5 and the ceramic gasket 4 are superposed.
The permanent magnet 5 is a samarium cobalt permanent magnet 5.
The locating slot has been seted up respectively to the central point on 4 tops of ceramic gasket and bottom, 5 bottoms of permanent magnet and the central point on center knot 301 top extend outward respectively have with locating slot complex location arch, when location arch was inserted in the locating slot, the central line of center knot 301, permanent magnet 5, ceramic gasket 4 was on a straight line. The ceramic gasket 4 is provided with the positioning groove and the permanent magnet 5 and the center knot 301 are provided with the positioning bulges, so that the positioning modes of the center knot 301, the ceramic gasket 4 and the permanent magnet 5 are simple and quick, and the central lines of the center knot 301, the ceramic gasket 4 and the permanent magnet 5 can be quickly overlapped in gluing and fixing.
The ferrite substrate 2 is made of spinel materials, adopts high-density materials, improves the surface polishing smoothness of the ferrite, and meets the requirements of users on excellent electrical performance indexes and broadband characteristics.
The structure designed by the embodiment ensures that the permanent magnet 5 magnetizes the ferrite substrate 2 longitudinally, the edge of the ferrite substrate 2 is magnetized uniformly, the grounding is good, and the base 1 has the same thermal expansion coefficient with the ferrite substrate 2, so that the ferrite substrate 2 can be protected during welding, the risk of cracking of the ferrite substrate 2 caused by welding is reduced, and the reliability of the product is improved.
Meanwhile, the upper surface of the ferrite substrate 2 is polished, and surface oil stains and impurity particles are removed by a chemical method; the physical method activates and removes the adsorption on the surface of the circuit film, thereby ensuring the adhesive force of the circuit film.
The main technical indexes of the broadband three-port microstrip circulator provided by the embodiment are as follows:
Figure BDA0002515980590000031
Figure BDA0002515980590000041
it will be understood by those skilled in the art that any combination of the elements of the present invention, including the summary and detailed description of the invention provided in the foregoing description and illustrated in the accompanying drawings, is not to be considered limiting in scope and in order to make the description more concise, and not to describe every element of the combination. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. The utility model provides a broadband three-port microstrip circulator, includes base, ferrite substrate, microstrip circuit, the permanent magnet of arranging in proper order down supreme, its characterized in that: set up ceramic pad between permanent magnet and the microstrip circuit, the microstrip circuit is including the center knot that is the hexagon structure, the marginal part of center knot is connected with three tributaries, and the contained angle between two adjacent tributaries is 120, connects the L/C circuit on every tributary, wherein outwards extends respectively on the lateral wall of two tributaries and on the both sides wall of another tributary has the horizontal bar, and wherein two tributaries buckle respectively 60 and use the center of center knot to form symmetrical structure as the center line of symmetry, and the center knot marginal part between two adjacent tributaries outwards extends has the fishbone form protruding.
2. The broadband three-port microstrip circulator of claim 1, wherein: the number of the fishbone-shaped bulges between two adjacent branches is two, the fishbone-shaped bulges are distributed in parallel, and the fishbone-shaped bulges are vertical to the central knot.
3. The broadband three-port microstrip circulator of claim 1, wherein: the horizontal bar and the connected branch are kept in a vertical state.
4. The broadband three-port microstrip circulator of claim 1, wherein: the ferrite substrate is fixed on the upper surface of the base, the microstrip circuit is fixed on the upper surface of the ferrite substrate, the ceramic gasket is glued on the microstrip circuit, and the permanent magnet is glued on the ceramic gasket.
5. The broadband three-port microstrip circulator of claim 1, wherein: the central lines of the central junction, the permanent magnet and the ceramic gasket are superposed.
6. The broadband three-port microstrip circulator of claim 1, wherein: the permanent magnet is a samarium cobalt permanent magnet.
7. The broadband three-port microstrip circulator of claim 1, wherein: the central lines of the base, the ferrite substrate, the ceramic gasket and the permanent magnet are on the same straight line.
8. The broadband three-port microstrip circulator of claim 1, wherein: the ferrite substrate is made of spinel material.
CN202020949465.2U 2020-05-29 2020-05-29 Broadband three-port microstrip circulator Active CN211980847U (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113745783A (en) * 2021-09-08 2021-12-03 浙江省东阳市东磁诚基电子有限公司 Printed circuit board type circulator and implementation method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113745783A (en) * 2021-09-08 2021-12-03 浙江省东阳市东磁诚基电子有限公司 Printed circuit board type circulator and implementation method thereof

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