Ultra-wideband multi-nested microstrip two-section circulator

Abstract

The utility model discloses an ultra wide band multi-nested microstrip two-section circulator, which comprises a base, a ceramic substrate, a microstrip circuit, ferrite, a ferrite substrate, a ceramic gasket and a samarium cobalt permanent magnet, the ferrite substrate is nested in a hole groove in the ceramic substrate through a nesting process to form a whole, the ceramic substrate is welded on the base through welding flux, the microstrip circuit is arranged on the upper surface of the ferrite substrate, the ceramic gasket is arranged on the microstrip circuit, and the samarium-cobalt permanent magnet is arranged on the ceramic gasket; the circulator is simple in structure, is suitable for surface mounting and microcircuit integration, and has the obvious advantages of good consistency, batch production, miniaturization and wide frequency band compared with a traditional circulator.

Description

Technical Field

[0001] This utility model relates to a circulator, and more particularly to an ultra-wideband multi-nested microstrip dual-section circulator, belonging to the field of microwave communication and radar detection. Background Technology

[0002] With the rapid development of microwave integration technology, the application of microwave electronic equipment is becoming increasingly widespread, leading to increased demand for circulators and isolators that are easy to integrate, miniaturized, and have wide bandwidth. Higher requirements are also being placed on electrical performance. Embedded circulators can no longer meet the surface-mount requirements of many systems. In response to market demand, a broadband ultra-miniaturized micro dual-junction band circulator has emerged, integrating the isolator and circulator into one unit. It boasts advantages such as light weight, smaller size, wider bandwidth, better consistency, and easy integration. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of the existing technology by providing an ultra-wideband multi-nested microstrip dual-section circulator with a simple structure, suitable for surface mounting and microcircuit integration. Compared with traditional circulators, it has significant advantages: good consistency, mass production capability, miniaturization, and wide bandwidth.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An ultrawideband multi-nested microstrip dual-junction circulator includes a base, a ceramic substrate, a microstrip circuit, a ferrite core, a ferrite substrate, a ceramic spacer, and a samarium cobalt permanent magnet. The ferrite core is integrated with the ferrite substrate through a nesting process. The ferrite substrate is nested within a cavity in the ceramic substrate through the same nesting process. The ceramic substrate is soldered onto the base. The microstrip circuit is disposed on the upper surface of the ferrite substrate. The ceramic spacer is disposed on the microstrip circuit, and the samarium cobalt permanent magnet is disposed on the ceramic spacer.

[0006] This utility model further defines the technical solution as follows:

[0007] Furthermore, the microstrip circuit is a dual-junction microstrip circuit, with three branches connected to the edge of the central circuit. The angle between two adjacent branches is 120°. Each branch is connected to an L / C circuit. There are protrusions extending outward from the edge of the central junction. The two T-junctions are connected to each other through one port. Three ports of the overall circuit are used for bonding, and the other port is connected to the load resistor.

[0008] Furthermore, the dual-ring microstrip circuit uses sputtering technology to sputter a gold layer onto a ceramic substrate, and then uses photolithography to etch the desired microstrip circuit onto the surface of the ceramic substrate.

[0009] Furthermore, the ceramic pad is bonded to the microstrip circuit with an epoxy resin layer, and the central axis of the ceramic pad overlaps with the central axis of the annulus of the microstrip circuit.

[0010] Furthermore, the samarium cobalt permanent magnet is bonded to the ceramic gasket using epoxy resin, and the central axis of the samarium cobalt permanent magnet overlaps with the central axis of the ceramic gasket.

[0011] Furthermore, the ferrite is made of high-density garnet material with a polished upper surface, and the ceramic substrate is made of high-density material with a polished surface.

[0012] Furthermore, the lower surface of the ferrite substrate is plated with gold, and the base is made of Kovar alloy with a silver-plated surface.

[0013] Compared with the prior art, the advantages of the technical solution of this utility model are as follows:

[0014] (1) This utility model is an ultra-wideband multi-nested microstrip dual-section circulator, which is suitable for surface mount technology and is connected to microwave circuits through gold wire bonding technology. It has small size, wide bandwidth, good consistency, excellent performance, simple structure and convenient use.

[0015] (2) This utility model ensures that the permanent magnet magnetizes the ferrite substrate longitudinally, the ferrite substrate edge is magnetized uniformly, the grounding is good, and since the thermal expansion coefficient of the base and the ferrite substrate are similar, the ferrite substrate can be protected during welding, reducing the risk of cracking of the ferrite substrate due to welding or other factors, and improving the reliability of the product.

[0016] (3) The ferrite is made of high-density garnet material. The upper surface is polished and the surface oil and impurity particles are removed by chemical methods. The surface is activated and adsorbed by physical methods to ensure the adhesion of the circuit film layer. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is an exploded view of the structure of this utility model. Detailed Implementation

[0019] Example

[0020] To make this utility model clearer, the following description, in conjunction with the accompanying drawings, further illustrates an ultrawideband multi-nested microstrip dual-section circulator of this utility model. The specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this utility model.

[0021] See Figure 1 and Figure 2 An ultrawideband multi-nested microstrip dual-junction circulator includes a base 2, a ceramic substrate 3, a microstrip circuit 6, a ferrite 5, a ferrite substrate 4, a ceramic pad 7, and a samarium cobalt permanent magnet 8. Two ferrites 5 with different parameters are integrated with the corresponding ferrite substrate 4 through a nesting process. The ferrite substrate 4 is nested in the slot of the ceramic substrate 3 through a nesting process, making them integrated. The ceramic substrate 3 is soldered to the base 2. The microstrip circuit 6 is set on the upper surface of the ferrite substrate 4, and the lower surface of the ferrite substrate is gold-plated.

[0022] The microstrip circuit is a dual-junction microstrip circuit, with three branches connected to the edge of the central circuit. The angle between two adjacent branches is 120°. Each branch is connected to an L / C circuit. There are protrusions extending outward from the edge of the central junction. The two T-junctions are connected to each other through one port. Three ports of the overall circuit are used for bonding, and the other port is connected to the load resistor 1. The dual-ring microstrip circuit 6 uses sputtering technology to sputter a gold layer onto the ceramic substrate 3, and then uses photolithography to etch the required microstrip circuit onto the surface of the ceramic substrate.

[0023] The ceramic pad 7 is bonded to the microstrip circuit 6 with an epoxy resin layer. The central axis of the ceramic pad 7 overlaps with the central axis of the annulus of the microstrip circuit 6. The samarium cobalt permanent magnet 8 is bonded to the ceramic pad 7 with epoxy resin. The central axis of the samarium cobalt permanent magnet 8 overlaps with the central axis of the ceramic pad 7.

[0024] In this embodiment, the ferrite is made of high-density garnet material with a polished upper surface, the ceramic substrate is made of high-density material with a polished surface, and the base is made of Kovar alloy with a silver-plated surface.

[0025] This embodiment of an ultrawideband multi-nested microstrip dual-junction circulator is suitable for surface mount technology and is connected to microwave circuits via gold wire bonding technology. Its main technical specifications are shown in the table below:

[0026]

[0027] In addition to the embodiments described above, this utility model may have other implementations. All technical solutions formed by equivalent substitution or equivalent transformation fall within the protection scope claimed by this utility model.

Claims

1. An ultra-wideband multiple nested microstrip dual-section circulator comprising a base (2), a ceramic substrate (3), a microstrip circuit (6), a ferrite (5), a ferrite substrate (4), a ceramic spacer (7) and a samarium-cobalt permanent magnet (8), characterized in that: The ferrite is integrated with the ferrite substrate (4) through a nesting process, the ferrite substrate (4) is nested in the hole slot in the ceramic substrate (3) through a nesting process, and the ceramic substrate is welded on the base (2) through solder, the microstrip circuit (6) is arranged on the upper surface of the ferrite substrate, the ceramic gasket (7) is arranged on the microstrip circuit (6), and the samarium-cobalt permanent magnet (8) is arranged on the ceramic gasket (7).

2. The ultra-wideband multi-nested microstrip dual-section circulator of claim 1, wherein: The microstrip circuit is a double-T microstrip circuit, the edge of the center circuit is connected with three branches, the included angle between two adjacent branches is 120°, each branch is connected with an L / C circuit, and the edge of the center joint is provided with protrusions distributed outward, the double-T branches are connected with each other through one port of each of the double-T branches, three ports of the whole circuit are used for bonding, and the other port is connected with a load resistor.

3. The ultra-wideband multi-nested microstrip dual-section circulator of claim 2, wherein: The microstrip circuit (6) is sputtered with a gold layer on the ceramic substrate (3) through a sputtering technology, and then the required microstrip circuit is etched on the upper surface of the ceramic substrate through a photoetching technology.

4. The ultra-wideband multi-nested microstrip dual-section circulator of claim 2, wherein: The ceramic gasket (7) is glued on the microstrip circuit (6) by an epoxy resin layer, and the center axis of the ceramic gasket (7) is overlapped with the center axis of the circular ring of the microstrip circuit (6).

5. The ultrawideband multi-nested microstrip dual-junction circulator according to claim 4, characterized in that: The samarium-cobalt permanent magnet (8) is glued on the ceramic gasket (7) by using an epoxy resin, and the center axis of the samarium-cobalt permanent magnet (8) is overlapped with the center axis of the ceramic gasket (7).

6. The ultra-wideband multi-nested microstrip dual-section circulator of claim 1, wherein: The ferrite is made of high-density material garnet, and the upper surface is polished; the ceramic substrate is made of high-density material, and the surface is polished.

7. The ultra- wideband multi-nested microstrip dual-section circulator of claim 1, wherein: The lower surface of the ferrite substrate is plated with gold, and the base is made of Kovar alloy and plated with silver.

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