Four-port circulator

Abstract

The invention provides a four-port circulator. The four-port circulator comprises a first port, a second port, a third port, a fourth port, ferrite and a microwave transmission chamber, the first port, the second port, the third port and the fourth port are symmetrically distributed at the periphery of the microwave transmission chamber and are communicated with the microwave transmission chamber; and the ferrite is transversely arranged on the upper surface or the lower surface of the central position in the microwave transmission cavity. The invention aims to reduce the size and the cost of the four-port waveguide circulator.

Description

Technical Field

[0001] The present invention relates to the technical field of microwave circulators, and particularly to a four-port circulator. Background Art

[0002] Waveguide circulators have made great progress in recent decades and have been widely used in high-power microwave systems such as long-range early warning radars, communication systems, high-power microwave radiators in medical applications, rock drilling in industry, and thermal drying systems. In systems such as radar transceiver and power synthesis, the currently widely used four-port differential phase shift circulator or a pair of three-port junction circulators connected in series to form four ports is very bulky, large in size, and quite expensive, which limits their integration in industrial applications, especially in future high-power applications. Facing the disadvantages of heavy weight and large size, how to miniaturize the four-port waveguide circulator is a challenging task. Summary of the Invention

[0003] Based on the above problems, the embodiments of the present application provide a four-port circulator, aiming to reduce the volume and cost of the four-port waveguide circulator.

[0004] The first aspect of the embodiments of the present application provides a four-port circulator, which includes a first port, a second port, a third port, a fourth port, a ferrite, and a microwave transmission chamber;

[0005] The first port, the second port, the third port, and the fourth port are symmetrically distributed around the microwave transmission chamber and communicate with the microwave transmission chamber;

[0006] The ferrite is horizontally disposed on the upper surface or the lower surface at the central position inside the microwave transmission chamber.

[0007] Optionally, each of the first port, the second port, the third port, and the fourth port is connected to the execution unit through a waveguide port or a coaxial port.

[0008] Optionally, when the port is connected to the execution unit through a coaxial port, the coaxial port is disposed on the upper top surface, or the lower bottom surface, or the side surface, or the end surface of the port.

[0009] Optionally, when the ferrite includes a first ferrite and a second ferrite, the ferrite is horizontally disposed on the upper surface or the lower surface at the central position inside the microwave transmission chamber, including:

[0010] The first ferrite is disposed on the upper surface or the lower surface inside the microwave transmission chamber at the intersection of the center lines of the first port and the second port;

[0011] The second ferrite is disposed on the upper surface or the lower surface within the microwave transmission cavity at the intersection of the centerlines of the third port and the fourth port.

[0012] Optionally, in the case where the ferrite pair includes a first ferrite pair and a second ferrite pair, the ferrite pair is horizontally disposed on the upper and lower surfaces at the central position within the microwave transmission cavity, including:

[0013] The first ferrite pair is disposed on the upper and lower surfaces within the microwave transmission cavity at the intersection of the centerlines of the first port and the second port;

[0014] The second ferrite pair is disposed on the upper and lower surfaces within the microwave transmission cavity at the intersection of the centerlines of the third port and the fourth port.

[0015] Optionally, the first ferrite is a ferrite disposed as a single-piece ferrite on the upper surface or the lower surface within the microwave transmission cavity, or the first ferrite is a ferrite disposed with a preset number of ferrite pieces on the upper surface or the lower surface within the microwave transmission cavity;

[0016] The second ferrite is a ferrite disposed as a single-piece ferrite on the upper surface or the lower surface within the microwave transmission cavity, or the second ferrite is a ferrite disposed with a preset number of ferrite pieces on the upper surface or the lower surface within the microwave transmission cavity.

[0017] Optionally, in the case where the ferrite includes a first ferrite column and a second ferrite column, the ferrite is horizontally disposed on the upper surface or the lower surface at the central position within the microwave transmission cavity, including:

[0018] The first ferrite column is disposed at the intersection of the centerlines of the first port and the second port and is connected to the upper and lower surfaces of the microwave transmission cavity or is connected to the upper surface of the microwave transmission cavity or is connected to the lower surface of the microwave transmission cavity;

[0019] The second ferrite column is disposed at the intersection of the centerlines of the third port and the fourth port and is connected to the upper and lower surfaces of the microwave transmission cavity or is connected to the upper surface of the microwave transmission cavity or is connected to the lower surface of the microwave transmission cavity.

[0020] Optionally, in the case where the ferrite includes a first ferrite and a second ferrite, or in the case where it includes a first ferrite column and a second ferrite column, the four-port circulator further includes: pins;

[0021] The pin is disposed at the central position of the microwave transmission chamber and is connected to the upper surface or the lower surface inside the microwave transmission chamber.

[0022] Optionally, the pin is cylindrical, or elliptical cylindrical, or rectangular columnar in shape.

[0023] Optionally, the upper and lower surfaces inside the microwave transmission chamber include first bosses protruding into the microwave transmission chamber, and second bosses are included on the first bosses.

[0024] A four-port circulator provided by an embodiment of the present application has the following advantages:

[0025] A four-port circulator provided by an embodiment of the present application includes a first port, a second port, a third port, a fourth port, a ferrite, and a microwave transmission chamber; the first port, the second port, the third port, and the fourth port are symmetrically distributed around the microwave transmission chamber and are in communication with the microwave transmission chamber; the ferrite faces the upper and lower surfaces disposed at the central position inside the microwave transmission chamber. Thus, in the actual application process, only one four-port circulator provided by the present invention is needed to achieve the circulating function of the four transmission channels (the high-power microwave signal passes through in the forward direction and enters the subsequent system, while bypassing and isolating the reflected signal that may be generated by the subsequent system. In addition, the microwave transmitting system and the receiving system are isolated to avoid the interference of the transmitting signal on the receiving signal), thereby being able to reduce the volume and cost of the four-port waveguide circulator. Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments of the present application will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 is a schematic diagram of a four-port circulator shown in an embodiment of the present application;

[0028] Figure 2 is a schematic diagram of an application scenario of a four-port circulator shown in an embodiment of the present application;

[0029] Figure 3 is a schematic diagram of the coaxial port setting in a four-port circulator shown in an embodiment of the present application;

[0030] Figure 4 is a schematic diagram of a four-port circulator with pins in a four-port circulator shown in an embodiment of the present application;

[0031] Figure 5 Another schematic diagram of a four-port circulator with pins in a four-port circulator shown in an embodiment of the present application;

[0032] Figure 6 Another schematic diagram of a four-port circulator shown in an embodiment of the present application.

[0033] Explanation of reference numerals:

[0034] First port 1; Second port 2; Third port 3; Fourth port 4; Ferrite 5; Microwave transmission chamber 6; First boss 7; Second boss 8; Outermost end face 9 of the port; Pin 10; Magnet 11; Water circulation 12; First ferrite 51; Second ferrite 52; First ferrite column 53; Second ferrite column 54. Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0036] To overcome the problems existing in the related art, the present application provides a four-port circulator. Figure 1 It is a schematic diagram of a four-port circulator shown in an embodiment of the present application. Referring to Figure 1 , the four-port circulator of the present application includes a first port, a second port, a third port, a fourth port, a ferrite, and a microwave transmission chamber; the first port, the second port, the third port, and the fourth port are symmetrically distributed around the microwave transmission chamber and communicate with the microwave transmission chamber; the ferrite is horizontally disposed on the upper surface or the lower surface at the central position inside the microwave transmission chamber.

[0037] In this embodiment, as Figure 1 shown, the four-port circulator provided by the present application has a hollow microwave transmission chamber 6. Four ports are symmetrically distributed around the hollow microwave transmission chamber 6, namely a first port 1, a second port 2, a third port 3, and a fourth port 4. The four ports are all communicated with the microwave transmission chamber 6. Ferrite 5 is distributed on the upper surface or the lower surface inside the microwave transmission chamber 6, Figure 1Shown is that ferrite 5 is distributed on the lower surface inside the microwave transmission chamber 6. The ferrite 5 is horizontally arranged at the central position of the microwave transmission chamber 6 and is connected to the lower surface of the microwave transmission chamber 6. In another embodiment, the ferrite 5 can also be a pair of ferrites, which are respectively distributed on the upper and lower surfaces inside the microwave transmission chamber 6. When the ferrite 5 is a pair of ferrites, one of the ferrites in the pair of ferrites is horizontally arranged at the central position of the microwave transmission chamber 6, and this one ferrite is connected to the upper surface of the microwave transmission chamber 6. The other ferrite in the pair of ferrites is horizontally arranged at the central position of the microwave transmission chamber 6, and this other ferrite is connected to the lower surface of the microwave transmission chamber 6. The two ferrites are symmetrically distributed on the upper and lower surfaces of the microwave transmission chamber 6.

[0038] In this embodiment, the four-port circulator provided by the present application can be used in various microwave and millimeter-wave transceiver systems, and two specific embodiments are described herein. One specific application scenario is as follows: The four ports are sequentially connected to an injection signal source, a magnetron, a processing unit, and a load. For example, the first port 1 is connected to the injection signal source, the second port 2 is connected to the magnetron, the third port 3 is connected to the processing unit, and the fourth port 4 is connected to the load. The injection signal source is used to inject a control signal to control the magnetron to input microwaves of a corresponding energy level. Then, the input microwaves will be unidirectionally transmitted to the third port 3 for use by the processing unit connected to the third port 3. The third port 3 can use the received microwaves for applications such as heating and drying. The load connected to the fourth port 4 is used to absorb the microwave energy reflected by the processing unit to prevent the reflected microwave energy from damaging the injection signal source connected to the first port 1, such as connecting a water load to the fourth port 4. Another specific application scenario is as Figure 2 shown, the four ports are sequentially connected to a transmitter, an antenna, a receiver, and a load. For example, the first port 1 is connected to the transmitter, the second port 2 is connected to the antenna, the third port 3 is connected to the receiver, and the fourth port 4 is connected to the load. The transmitter at the first port 1 is used to output a microwave signal, which is unidirectionally transmitted to the antenna at the second port 2. The antenna transmits the microwave signal into space. At the same time, the antenna at the second port 2 is also used to receive microwave signals in space and unidirectionally transmit the received microwave signals to the receiver at the third port 3. The load at the fourth port 4 is used to absorb the microwave energy reflected by the receiver, such as setting a water load at the fourth port 4.

[0039] In the present application, the upper and lower surfaces inside the microwave transmission chamber include a first boss protruding into the interior of the microwave transmission chamber, and a second boss is included on the first boss.

[0040] In this embodiment, as Figure 1As shown in the figure, to improve the port matching effect of microwaves in the microwave transmission chamber 6, that is, the microwaves input at each port can better enter the microwave transmission chamber 6 and have lower microwave reflection. In this application, the upper surface of the hollow microwave transmission chamber 6 has a first boss 7 protruding into the interior of the microwave transmission chamber 6, and the lower surface of the hollow microwave transmission chamber 6 also has a first boss 7 protruding into the interior of the microwave transmission chamber 6. At the same time, on the surface of the first boss 7 on the upper surface, there is a second boss 8 protruding into the interior of the microwave transmission chamber 6 and concentric with the first boss 7. On the surface of the first boss 7 on the lower surface, there is also a second boss 8 protruding into the interior of the microwave transmission chamber 6 and concentric with the first boss 7. At this time, one of the ferrite pairs 5 has a ferrite arranged horizontally at the center position of the second boss 8 on the upper surface inside the microwave transmission chamber 6, and the other ferrite in the ferrite pair 5 is arranged horizontally at the center position of the second boss 8 on the lower surface inside the microwave transmission chamber 6.

[0041] In this application, each of the first port, the second port, the third port, and the fourth port is connected to the execution unit through a waveguide port or a coaxial port.

[0042] In this embodiment, the four ports of the four-port circulator can be set with specific connection methods to the execution unit according to the magnitude of the microwave energy transmitted in the actual application scenario, such as waveguide ports and coaxial ports. When the microwave energy transmitted in the actual application scenario is relatively large, the four ports can be connected to the execution unit in the form of waveguide ports. As Figure 1 As shown in the figure, each port shown in the figure is a hollow structure. At this time, the connection method between each port and the execution unit is through a waveguide port. Among them, the execution unit includes, but is not limited to, an injection signal source, a magnetron, an antenna, a microwave signal transmitter, a microwave signal receiver, and a water load. When the microwave energy transmitted in the actual application scenario is relatively small, the four ports can be connected to the execution unit in the form of coaxial ports. As Figure 1 As shown in the figure, when the four ports are connected to each execution unit through coaxial ports, Figure 1 the outermost end surface 9 of the 4 ports shown is in a closed state, and then a coaxial port is opened on any one end surface of the four ports so that the execution unit can be connected to the four ports of the four-port circulator in the form of coaxial ports.

[0043] In this application, when the port is connected to the execution unit through a coaxial port, the coaxial port is set at the upper top surface of the port, or at the lower bottom surface of the port, or at the side surface of the port, or at the end surface of the port.

[0044] In this embodiment, when the four ports are connected to their respective corresponding execution units in the form of coaxial ports, the position where the coaxial ports are set can be on the upper top surface of the port, or on the lower bottom surface of the port, or on the left and right side surfaces of the port, or on the end surface of the port. As Figure 3 shown, Figure 3 Fig. shows a schematic diagram of setting a coaxial port on the end surface of a port.

[0045] In this application, when the ferrite includes a first ferrite and a second ferrite, the ferrite is horizontally arranged on the upper surface or the lower surface at the central position in the microwave transmission cavity, including:

[0046] The first ferrite is arranged on the upper surface or the lower surface in the microwave transmission cavity at the intersection of the center lines of the first port and the second port;

[0047] The second ferrite is arranged on the upper surface or the lower surface in the microwave transmission cavity at the intersection of the center lines of the third port and the fourth port.

[0048] In this application, when the ferrite pair includes a first ferrite pair and a second ferrite pair, the ferrite pair is horizontally arranged on the upper and lower surfaces at the central position in the microwave transmission cavity, including:

[0049] The first ferrite pair is arranged on the upper and lower surfaces in the microwave transmission cavity at the intersection of the center lines of the first port and the second port;

[0050] The second ferrite pair is arranged on the upper and lower surfaces in the microwave transmission cavity at the intersection of the center lines of the third port and the fourth port.

[0051] In this application, the first ferrite is a ferrite arranged as a single-piece ferrite on the upper surface or the lower surface in the microwave transmission cavity, or the first ferrite is a ferrite arranged with a preset number of ferrite pieces on the upper surface or the lower surface in the microwave transmission cavity;

[0052] The second ferrite is a ferrite arranged as a single-piece ferrite on the upper surface or the lower surface in the microwave transmission cavity, or the second ferrite is a ferrite arranged with a preset number of ferrite pieces on the upper surface or the lower surface in the microwave transmission cavity.

[0053] In this embodiment, as Figure 4 shown, another implementation manner of the ferrite 5 in the four-port circulator provided in this application is that the ferrite 5 includes a first ferrite 51 and a second ferrite 52.

[0054] In the case where the ferrite 5 includes a first ferrite 51 and a second ferrite 52, the first ferrite 51 is disposed on the upper surface or the lower surface within the microwave transmission chamber 6 at the intersection of the centerlines of the first port 1 and the second port 2. Figure 4 Shown in Figure 4 is that the first ferrite 51 is disposed on the lower surface within the microwave transmission chamber 6 at the intersection of the centerlines of the first port 1 and the second port 2. In another embodiment, the first ferrite 51 may also be a pair of first ferrites, which are respectively disposed on the upper and lower surfaces within the microwave transmission chamber 6 at the intersection of the centerlines of the first port 1 and the second port 2. When the first ferrite 51 is a pair of first ferrites, a part of the ferrite in the pair of first ferrites is disposed on the lower surface within the microwave transmission chamber 6 at the intersection of the centerlines of the first port 1 and the second port 2, and the other part of the first ferrite in the pair of first ferrites is disposed on the upper surface within the microwave transmission chamber 6 at the intersection of the centerlines of the first port 1 and the second port 2. The two parts of the ferrite are symmetrically distributed on the upper and lower surfaces within the microwave transmission chamber 6 at the intersection of the centerlines of the first port 1 and the second port 2.

[0055] In this embodiment, the first ferrite 51 disposed on the upper surface or the lower surface within the microwave transmission chamber 6 at the intersection of the centerlines of the first port 1 and the second port 2 may be a single piece of ferrite or a preset number of ferrite pieces. As Figure 4 shown, shown is that the first ferrite 51 is 3 pieces of ferrite disposed on the lower surface within the microwave transmission chamber 6 at the intersection of the centerlines of the first port 1 and the second port 2. When the first ferrite 51 may be a pair of first ferrites, the number of the two parts of the ferrite respectively distributed on the upper and lower surfaces within the microwave transmission chamber 6 at the intersection of the centerlines of the first port 1 and the second port 2 is the same. For example, if the number of ferrite pieces disposed on the upper surface within the microwave transmission chamber 6 at the intersection of the centerlines of the first port 1 and the second port 2 in a pair of first ferrites is 3, then the number of ferrite pieces disposed on the lower surface within the microwave transmission chamber 6 at the intersection of the centerlines of the first port 1 and the second port 2 in the other part of the pair of first ferrites is also 3. At the same time, the two parts are symmetrically distributed on the upper and lower surfaces within the microwave transmission chamber 6 at the intersection of the centerlines of the first port 1 and the second port 2.

[0056] The second ferrite 52 is disposed on the upper surface or the lower surface within the microwave transmission chamber 6 at the intersection of the centerlines of the third port 3 and the fourth port 4. Figure 4Shown is the lower surface of the second ferrite 52 within the microwave transmission chamber 6 at the intersection of the centerlines of the third port 3 and the fourth port 4. In another embodiment, the second ferrite 52 can also be a pair of second ferrites, which are respectively disposed on the upper and lower surfaces within the microwave transmission chamber 6 at the intersection of the centerlines of the third port 3 and the fourth port 4. When the second ferrite 52 is a pair of second ferrites, a part of the ferrite in the pair is disposed on the lower surface within the microwave transmission chamber 6 at the intersection of the centerlines of the third port 3 and the fourth port 4, and the other part of the second ferrite in the pair is disposed on the upper surface within the microwave transmission chamber 6 at the intersection of the centerlines of the third port 3 and the fourth port 4. The two parts of the ferrite are symmetrically distributed on the upper and lower surfaces within the microwave transmission chamber 6 at the intersection of the centerlines of the third port 3 and the fourth port 4.

[0057] In this embodiment, the second ferrite 52 disposed on the upper or lower surface within the microwave transmission chamber 6 at the intersection of the centerlines of the third port 3 and the fourth port 4 can be a single piece of ferrite or a preset number of ferrite pieces. As Figure 4 shown, the second ferrite 52 shown is 3 pieces of ferrite disposed on the lower surface within the microwave transmission chamber 6 at the intersection of the centerlines of the third port 3 and the fourth port 4. When the second ferrite 52 can be a pair of second ferrites, the number of ferrite pieces in the two parts respectively distributed on the upper and lower surfaces within the microwave transmission chamber 6 at the intersection of the centerlines of the third port 3 and the fourth port 4 is the same. For example, if the number of ferrite pieces disposed on the upper surface within the microwave transmission chamber 6 at the intersection of the centerlines of the third port 3 and the fourth port 4 in a pair of second ferrites is 3, then the number of ferrite pieces disposed on the lower surface within the microwave transmission chamber 6 at the intersection of the centerlines of the third port 3 and the fourth port 4 in the other part of the pair of second ferrites is also 3. At the same time, the two parts are symmetrically distributed on the upper and lower surfaces within the microwave transmission chamber 6 at the intersection of the centerlines of the third port 3 and the fourth port 4. Among them, the shape of each piece of ferrite can be circular, triangular or polygonal, and no specific limitation is made here.

[0058] In this embodiment, when the first ferrite 51 can be a pair of first ferrites and the second ferrite 52 can be a pair of second ferrites, the number of the pair of first ferrites and the pair of second ferrites can be different. For example, among the pair of first ferrites, 3 ferrite sheets are arranged on the upper surface of the microwave transmission chamber 6 at the intersection of the centerlines of the first port 1 and the second port 2, and among the pair of first ferrites, another 3 ferrite sheets are arranged on the lower surface of the microwave transmission chamber 6 at the intersection of the centerlines of the first port 1 and the second port 2; among the pair of second ferrites, 1 ferrite sheet is arranged on the upper surface of the microwave transmission chamber 6 at the intersection of the centerlines of the third port 3 and the fourth port 4, and among the pair of second ferrites, another 1 ferrite sheet is also arranged on the lower surface of the microwave transmission chamber 6 at the intersection of the centerlines of the third port 3 and the fourth port 4.

[0059] In this application, when the ferrite includes a first ferrite column and a second ferrite column, the ferrite is horizontally arranged on the upper surface or the lower surface at the central position in the microwave transmission chamber, including: the first ferrite column is arranged at the intersection of the centerlines of the first port and the second port and is connected to the upper and lower surfaces of the microwave transmission chamber or is connected to the upper surface of the microwave transmission chamber or is connected to the lower surface of the microwave transmission chamber; the second ferrite column is arranged at the intersection of the centerlines of the third port and the fourth port and is connected to the upper and lower surfaces of the microwave transmission chamber or is connected to the upper surface of the microwave transmission chamber or is connected to the lower surface of the microwave transmission chamber.

[0060] In this embodiment, as Figure 5 shown, another implementation manner of the ferrite in the four-port circulator provided in this application is that the ferrite 5 includes a first ferrite column 53 and a second ferrite column 54.

[0061] When the ferrite 5 includes a first ferrite column 53 and a second ferrite column 54, the first ferrite column 53 is arranged in the microwave transmission chamber 6 at the intersection of the centerlines of the first port 1 and the second port 2 and is connected to the upper and lower surfaces of the microwave transmission chamber 6, and can also be connected to only one of the upper and lower surfaces of the microwave transmission chamber 6. The second ferrite column 54 is arranged in the microwave transmission chamber 6 at the intersection of the centerlines of the third port 3 and the fourth port 4 and is connected to the upper and lower surfaces of the microwave transmission chamber 6, and can also be connected to only one of the upper and lower surfaces of the microwave transmission chamber 6.

[0062] In the present application, when the ferrite includes a first ferrite and a second ferrite, or includes a first ferrite column and a second ferrite column, the four-port circulator further includes: a pin; the pin is disposed at the central position of the microwave transmission chamber and is connected to the upper surface or the lower surface inside the microwave transmission chamber.

[0063] In this embodiment, as Figure 4 and Figure 5 shown, when one embodiment of the ferrite 5 includes a first ferrite 51 and a second ferrite 52, or when one embodiment of the ferrite 5 includes a first ferrite column 53 and a second ferrite column 54, the four-port circulator provided in the present application further includes a pin 10, and the pin 10 is disposed at the central position of the microwave transmission chamber 6 and is connected to the upper surface or the lower surface of the microwave transmission chamber 6.

[0064] In the present application, the pin is cylindrical, or ellipsoidal, or rectangular.

[0065] In this embodiment, the pin 10 provided in the four-port circulator can be cylindrical, or ellipsoidal, or rectangular, and can also be other columnar shapes, which are not specifically limited herein.

[0066] In this embodiment, the purpose of providing the ferrite 5 is to achieve non-reciprocal transmission of microwaves in the microwave transmission chamber 6, that is, one-way transmission. For the ferrite 5 to achieve non-reciprocal transmission of microwaves in the microwave transmission chamber 6, a bias magnetic field needs to be set at the positions on the upper and lower surfaces of the four-port circulator facing the ferrite 5 (such as setting magnets 11 to form a bias magnetic field) so as to achieve non-reciprocal transmission of microwaves in the microwave transmission chamber 6. As Figure 6 shown, Figure 6 shows a schematic diagram of the setting positions of the magnets 11. Two magnets 11 are respectively set at the positions on the upper surface of the four-port circulator facing the ferrite 5 and two magnets 11 are set at the positions on the lower surface of the four-port circulator facing the ferrite 5. It should be understood that this only schematically shows the positional relationship between the magnets 11 and the ferrite 5 and does not limit the present application. Similarly, larger-area magnets 11 can be set on the upper surface of the four-port circulator to cover the ferrite set on the upper surface inside the microwave transmission chamber 6, and larger-area magnets 11 can be set on the lower surface of the four-port circulator to cover the ferrite set on the lower surface inside the microwave transmission chamber 6, which are not specifically limited herein.

[0067] In this embodiment, to ensure the long-term normal operation of the four-port circulator, as Figure 6As shown, a water circulation path 12 is constructed between the magnet 11 and the ferrite inside the housing of the four-port circulator of the present application to cool the ferrite and the magnet 11 during operation, so as to ensure the long-term normal operation of the four-port circulator. As Figure 6 shown Figure 6 This is only an exemplary illustration of the water circulation path 12 constructed between the magnet 11 and the ferrite, and does not limit the present application. The water circulation path 12 constructed between the magnet 11 and the ferrite can also be a water circulation path 12 with other structures, and specific limitations are not made here.

[0068] In the embodiments of the present invention, since the circulator needs to have the characteristic of good unidirectional circular propagation and isolation in the reverse direction. When the embodiment of the ferrite 5 is the first ferrite 51 and the second ferrite 52, or when the embodiment of the ferrite 5 is the first ferrite column 53 and the second ferrite column 54, during the transmission process from the second port 2 to the third port 3, part of the microwave will return to the first port 1, resulting in insufficient excellent isolation performance of the four-port circulator. In order for the four-port circulator provided by the present invention to have the characteristic of high isolation in the actual application process, when the embodiment of the ferrite 5 is the first ferrite 51 and the second ferrite 52, the present application provides a pin 10 on the upper surface in the microwave transmission chamber 6 at the midpoint of the central connection line between the first ferrite 51 and the second ferrite 52, or a pin 10 is provided on the lower surface in the microwave transmission chamber 6 at the midpoint of the central connection line between the first ferrite 51 and the second ferrite 52, that is, the pin 10 is connected to one of the upper and lower surfaces in the microwave transmission chamber 6. When the embodiment of the ferrite 5 is the first ferrite column 53 and the second ferrite column 54, the present application provides a pin 10 on the upper surface in the microwave transmission chamber 6 at the midpoint of the central connection line between the first ferrite column 53 and the second ferrite column 54, or a pin 10 is provided on the lower surface in the microwave transmission chamber 6 at the midpoint of the central connection line between the first ferrite column 53 and the second ferrite column 54, that is, the pin 10 is connected to one of the upper and lower surfaces in the microwave transmission chamber 6. Among them, the pin 10 can be integrally formed with the surface in the microwave transmission chamber 6, or can be installed later after the microwave transmission chamber 6 is processed, and specific limitations are not made here. Among them, the material of the pin 107 is metal.

[0069] Each embodiment in this specification is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other.

[0070] Although the preferred embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications once they know the basic creative concept. Therefore, the appended claims are intended to be construed as including the preferred embodiments and all changes and modifications falling within the scope of the embodiments of the present invention.

[0071] Finally, it should also be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or terminal device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or terminal device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method, article or terminal device comprising the said element.

[0072] The above has introduced in detail a four-port circulator provided by the present invention. Specific examples are used in this text to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A four-port circulator, characterized in that, The four-port circulator includes a first port, a second port, a third port, a fourth port, a ferrite, and a microwave transmission chamber; The first port, the second port, the third port, and the fourth port are symmetrically distributed around the microwave transmission chamber and communicate with the microwave transmission chamber; The ferrite is horizontally disposed on the upper surface or the lower surface at the central position within the microwave transmission chamber.

2. The four-port circulator according to claim 1, characterized in that, Each of the first port, the second port, the third port, and the fourth port is connected to the execution unit through a waveguide port or a coaxial port.

3. The four-port circulator according to claim 2, wherein, When the port is connected to the execution unit through a coaxial port, the coaxial port is disposed at the upper top surface of the port, or at the lower bottom surface of the port, or at the side surface of the port, or at the end surface of the port.

4. The four-port circulator according to claim 1, characterized in that, When the ferrite includes a first ferrite and a second ferrite, the ferrite is horizontally disposed on the upper surface or the lower surface at the central position within the microwave transmission chamber, including: The first ferrite is disposed on the upper surface or the lower surface within the microwave transmission chamber at the intersection of the centerlines of the first port and the second port; The second ferrite is disposed on the upper surface or the lower surface within the microwave transmission chamber at the intersection of the centerlines of the third port and the fourth port.

5. The four-port circulator according to claim 1, characterized in that, When the ferrite pair includes a first ferrite pair and a second ferrite pair, the ferrite pair is horizontally disposed on the upper and lower surfaces at the central position within the microwave transmission chamber, including: The first ferrite pair is disposed on the upper and lower surfaces within the microwave transmission chamber at the intersection of the centerlines of the first port and the second port; The second ferrite pair is disposed on the upper and lower surfaces within the microwave transmission chamber at the intersection of the centerlines of the third port and the fourth port.

6. The four-port circulator according to claim 4, wherein, The first ferrite is a ferrite disposed as a single-piece ferrite on the upper surface or the lower surface within the microwave transmission chamber, or the first ferrite is a ferrite disposed with a preset number of ferrite pieces on the upper surface or the lower surface within the microwave transmission chamber; The second ferrite is a ferrite disposed as a single-piece ferrite on the upper surface or the lower surface within the microwave transmission chamber, or the second ferrite is a ferrite disposed with a preset number of ferrite pieces on the upper surface or the lower surface within the microwave transmission chamber.

7. The four-port circulator according to claim 6, wherein When the ferrite includes a first ferrite column and a second ferrite column, the ferrite is horizontally disposed on the upper surface or the lower surface at the central position within the microwave transmission chamber, including: The first ferrite column is disposed at the intersection of the centerlines of the first port and the second port and is connected to the upper and lower surfaces of the microwave transmission chamber, or is connected to the upper surface of the microwave transmission chamber, or is connected to the lower surface of the microwave transmission chamber; The second ferrite column is disposed at the intersection of the centerlines of the third port and the fourth port and is connected to the upper and lower surfaces of the microwave transmission chamber or is connected to the upper surface of the microwave transmission chamber or is connected to the lower surface of the microwave transmission chamber.

8. The four-port circulator according to claim 7, characterized in that, When the ferrite includes a first ferrite and a second ferrite, or includes a first ferrite column and a second ferrite column, the four-port circulator further includes: a pin; The pin is disposed at the central position of the microwave transmission chamber and is connected to the upper surface or the lower surface inside the microwave transmission chamber.

9. The four-port circulator according to claim 8, wherein, The pin has a cylindrical shape, or an elliptical cylindrical shape, or a rectangular column shape.

10. The four-port circulator according to claim 1, characterized in that, The upper and lower surfaces inside the microwave transmission chamber include a first boss protruding into the microwave transmission chamber, and a second boss is included on the first boss.

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