CN219959391U - P-band Gao Hudiao broadband circulator/isolator with one-inch size - Google Patents

Abstract

The utility model discloses a P-band Gao Hudiao broadband circulator/isolator with a size of one inch, which comprises a central conductor, wherein ferrite is respectively arranged on the upper surface and the lower surface of the central conductor, a ceramic dielectric ring is sleeved on the side wall of the ferrite, the central conductor comprises a central junction and three matching circuits, and the matching circuits comprise an inductance type transmission line, a capacitance type transmission line and a microwave transmission line. In the utility model, the radius of the center junction is larger than that of the ferrite, and the projection of the ferrite on the horizontal plane is positioned in the projection area of the center junction on the horizontal plane, so that the intermodulation performance can be effectively improved, and the intermodulation performance can be improved by about 60%; the inductance type transmission line is arranged along the circumferential direction of the outer wall of the center junction, and the projection of the inductance type transmission line and the capacitance type transmission line on the horizontal plane is positioned in the projection area of the ceramic dielectric ring on the horizontal plane, so that the matching of the center junction can be successfully realized in the limited space size, the bandwidth of 25% is achieved, and the intermodulation performance is improved while the broadband performance is improved.

Description

P-band Gao Hudiao broadband circulator/isolator with one-inch size

Technical Field

The utility model relates to a circulator/isolator, in particular to a P-band Gao Hudiao broadband circulator/isolator with a size of one inch.

Background

Along with the development trend of miniaturization, users put high index requirements on a circulator/isolator, but broadband performance and high intermodulation performance are difficult to realize simultaneously on the basis of miniaturization. In the prior art, intermodulation performance of the circulator mainly depends on normalized saturation magnetic moment P value and normalized internal field ratio sigma, and when the existing P-band circulator realizes certain high intermodulation performance, wider bandwidth is difficult to realize.

For the P-band circulator/isolator with the size limited to 1 inch, the design that the normalized internal field value sigma is larger than 2.2 is generally adopted to realize higher intermodulation performance, the circuit structure adopts a double-Y junction or a deformation circuit of the double-Y junction to compress the whole size, and realize certain electrical performance, and the design is a design method related to the P-band circulator/isolator with intermodulation requirement in the industry, but only can realize 5-10% of bandwidth.

For the circulator/isolator with the working frequency of 758-960 MHz and the size of 1 inch, the bandwidth requirement reaches 24%, and according to the general design thought, the circulator/isolator can only achieve the return loss of < -18dB, the insertion loss of < 0.4dB, the intermodulation performance of 2X 50W, and the bandwidth requirement can only reach the level of-50 dBc under the test condition of 1MHz of double-tone interval. The intermodulation performance and the bandwidth performance of the optical fiber cannot meet the requirements of users on the indexes of the circulator/isolator.

Disclosure of Invention

The present utility model aims to provide a P-band Gao Hudiao wideband circulator/isolator with one inch size, which solves the above problems and can improve intermodulation performance and wideband performance at the same time.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the P-band Gao Hudiao broadband circulator/isolator with the size of one inch comprises a central conductor, wherein ferrite is respectively arranged on the upper surface and the lower surface of the central conductor, the ferrite and the central conductor are coaxially arranged, a ceramic dielectric ring is sleeved on the side wall of the ferrite, and the central conductor comprises a central junction and three matching circuits;

the three matching circuits are uniformly distributed on the outer wall of the center junction, the matching circuits comprise an inductance type transmission line, a capacitance type transmission line and a microwave transmission line which are sequentially connected, wherein the inductance type transmission line is arranged along the circumferential direction of the outer wall of the center junction, one end of the inductance type transmission line is bent by 90 degrees to form a connecting part to be connected with the center junction, the other end of the inductance type transmission line is connected with the capacitance type transmission line, the microwave transmission line is bent by 90 degrees to one side far away from the center junction, and the three microwave transmission lines are respectively used for connecting three ports;

the radius of the center junction is larger than that of the ferrite, and the projection of the ferrite on the horizontal plane is positioned in the projection area of the center junction on the horizontal plane;

and the projection of the inductance type transmission line and the capacitance type transmission line in the matching circuit on the horizontal plane is positioned in the projection area of the ceramic dielectric ring on the horizontal plane.

As preferable: the inner field of the circulator is 1.2-1.8.

Compared with the prior art, the utility model has the advantages that: the radius of the center junction is larger than that of the ferrite, and the projection of the ferrite on the horizontal plane is positioned in the projection area of the center junction on the horizontal plane, so that the intermodulation performance can be effectively improved, and the intermodulation performance can be improved by about 60%; the inductance type transmission line is arranged along the circumferential direction of the outer wall of the center junction, and the projection of the inductance type transmission line and the capacitance type transmission line on the horizontal plane is positioned in the projection area of the ceramic dielectric ring on the horizontal plane, so that the matching of the center junction can be successfully realized in the limited space size, and the bandwidth of 25% is achieved.

Based on the structure of the utility model, the intermodulation performance can be improved and the broadband performance can be improved.

Drawings

Fig. 1 is a schematic diagram showing an exploded structure of a P-band circulator/isolator according to the prior art;

FIG. 2 is a schematic illustration of the assembled FIG. 1;

FIG. 3 is a schematic view of the structure of the center conductor of the present utility model;

fig. 4 is a relative positional relationship of the center conductor to the ferrite and ceramic dielectric ring.

In the figure: 1. a cavity; 2. constant magnetic property of strontium; 3. a ground plate; 401. a ferrite; 402. a ceramic dielectric ring; 5. a center conductor; 501. a center knot; 502. a connection part; 503. an inductive transmission line; 504. a capacitive transmission line; 505. a microwave transmission line; 6. a compensation sheet; 7. and a cover plate.

Description of the embodiments

The utility model will be further described with reference to the accompanying drawings.

Example 1: referring to fig. 1 and 2, a P-band circulator/isolator in the prior art comprises a cavity 1, and further comprises two horizontal strontium permanent magnets 2, wherein the two strontium permanent magnets 2 are arranged up and down and the projections of the horizontal planes coincide, two grounding plates 3 are arranged between the two strontium permanent magnets 2, two ferrites 401 are arranged between the two grounding plates 3, a central conductor 5 is arranged between the two ferrites 401, a ceramic medium ring 402 is arranged on the outer wall of the ferrite 401, the whole body formed by the strontium permanent magnets 2, the grounding plates 3, the ferrites 401 and the central conductor 5 is placed in the cavity 1, a compensation sheet 6 is arranged at the top, a cover plate 7 is covered, and the cover plate 7 is matched with the cavity 1 to form a whole body.

The working principle of the electromagnetic wave-shielding device is that a magnetic circuit is formed by pressing a cavity 1 and a cover plate 7, a magnetic field is provided by a strontium constant magnet 2, the magnetic field generated by the strontium constant magnet 2 is uniformly transmitted to a ferrite 401 by a grounding plate 3, the ferrite 401 is magnetized to provide gyromagnetic action, a central conductor 5 enables microwave signals to be transmitted, a ceramic dielectric ring 402 is used for optimizing the size of the central conductor 5 and improving circuit matching, and a compensation sheet 6 enables the P-band circulator/isolator to have wide-temperature working capacity.

Example 2: referring to fig. 1 to 4, the present utility model is improved on the basis of embodiment 1, mainly by improving the structures of the central conductor 5 and the ferrite 401, and the lamination relationship between the cavity 1 and the cover plate 7, the strontium permanent magnet 2, the grounding plate 3, the ferrite 401, the central conductor 5 and the compensation sheet 6 is unchanged. Specifically, the P-band Gao Hudiao broadband circulator/isolator with the size of one inch comprises a central conductor 5, wherein ferrite 401 is respectively arranged on the upper surface and the lower surface of the central conductor 5, the ferrite 401 and the central conductor are coaxially arranged, a ceramic dielectric ring 402 is sleeved on the side wall of the ferrite 401, and the central conductor 5 comprises a central junction 501 and three matching circuits;

the three matching circuits are uniformly distributed on the outer wall of the center junction 501, and each matching circuit comprises an inductance type transmission line 503, a capacitance type transmission line 504 and a microwave transmission line 505 which are sequentially connected, wherein the inductance type transmission line 503 is arranged along the circumferential direction of the outer wall of the center junction 501, one end of each inductance type transmission line is bent by 90 degrees to form a connecting part 502 to be connected with the center junction 501, the other end of each inductance type transmission line is connected with the capacitance type transmission line 504, the microwave transmission line 505 is bent by 90 degrees to one side far away from the center junction 501, and the three microwave transmission lines 505 are respectively used for connecting three ports;

the radius of the center junction 501 is larger than that of the ferrite 401, and the projection of the ferrite 401 on the horizontal plane is positioned in the projection area of the center junction 501 on the horizontal plane;

the projections of the inductive transmission line 503 and the capacitive transmission line 504 in the matching circuit on the horizontal plane are located in the projection area of the ceramic dielectric ring 402 on the horizontal plane.

In this embodiment, the field in the circulator is 1.2-1.8.

In addition, P1, P2, P3 in fig. 3 are three ports of the circulator/isolator product, respectively, and three microwave transmission lines 505 of the matching circuit are connected to the three ports, respectively. The distributed parameter connection part 502, the inductive transmission line 503 and the capacitive transmission line 504 are all technical approaches adopting the surrounding of the central junction 501, and the matching of the central junction 501 can be successfully realized in a limited space size.

For the product of the utility model with the working frequency of 758-960 MHz and the size of 1 inch, the intermodulation performance reaches full frequency band-80 dBc under the test condition of 2X 50W and 1MHz in double-tone interval under the condition of 24% bandwidth.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (2)

1. The utility model provides a P wave band Gao Hudiao broadband circulator/isolator under one inch size, includes that center conductor, center conductor upper and lower surface are equipped with a ferrite respectively, and the coaxial setting of three, ferrite lateral wall cup joints a ceramic dielectric ring, center conductor includes central knot and three matching circuit, its characterized in that:

the three matching circuits are uniformly distributed on the outer wall of the center junction, the matching circuits comprise an inductance type transmission line, a capacitance type transmission line and a microwave transmission line which are sequentially connected, wherein the inductance type transmission line is arranged along the circumferential direction of the outer wall of the center junction, one end of the inductance type transmission line is bent by 90 degrees to form a connecting part to be connected with the center junction, the other end of the inductance type transmission line is connected with the capacitance type transmission line, the microwave transmission line is bent by 90 degrees to one side far away from the center junction, and the three microwave transmission lines are respectively used for connecting three ports;

the radius of the center junction is larger than that of the ferrite, and the projection of the ferrite on the horizontal plane is positioned in the projection area of the center junction on the horizontal plane;

and the projection of the inductance type transmission line and the capacitance type transmission line in the matching circuit on the horizontal plane is positioned in the projection area of the ceramic dielectric ring on the horizontal plane.

2. The one inch sized P-band Gao Hudiao broadband circulator/isolator set forth in claim 1, wherein: the inner field of the circulator is 1.2-1.8.