CN107317082B - Waveguide two-dimensional single-pulse sum-difference network - Google Patents
Waveguide two-dimensional single-pulse sum-difference network Download PDFInfo
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- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/12—Coupling devices having more than two ports
Abstract
The invention relates to the technical field of microwaves, in particular to a waveguide two-dimensional single-pulse sum-difference network. The waveguide two-dimensional single-pulse sum-difference network comprises a phase-shifting network, a primary 3dB coupling network and a secondary 3dB coupling network which are sequentially connected; the phase-shifting network comprises four phase-shifting waveguides which are parallel to each other; the first-stage 3dB coupling network comprises four coupling waveguides I which are parallel to each other; the second-stage 3dB coupling network comprises four coupling waveguides II which are parallel to each other; the corresponding phase shifting waveguide, the coupling waveguide I and the coupling waveguide II respectively form a first network waveguide, a second network waveguide, a third network waveguide and a fourth network waveguide. The waveguide two-dimensional single-pulse sum-difference network adopts a combination form of a 3dB waveguide wide-side coupler and a 3dB waveguide narrow-side coupler, the whole structure only comprises four mutually parallel waveguides, the waveguides share a waveguide wide wall and a waveguide narrow wall, and the couplers are directly connected without transition waveguides, so the structure is compact, and the processing is simple and convenient.
Description
Technical Field
The invention relates to the technical field of microwaves, in particular to a waveguide two-dimensional single-pulse sum-difference network.
Background
The sum-difference network is also called as a sum-difference device, a comparator or a monopulse processor, is an important microwave passive device, is widely applied to the field of radar antenna feeder networks of monopulse systems and the like, and has the function of carrying out sum-difference comparison operation on two or four independent signals received by a radar antenna and simultaneously outputting sum-difference signals so as to obtain angle error signals and realize target tracking.
Generally, the received signals of two quadrants of the one-dimensional monopulse antenna can only output a sum signal and an azimuth difference signal or a pitch difference signal after one-time sum-difference comparison, while the two-dimensional monopulse antenna needs to compare the received signals of four quadrants by adding and difference in azimuth and then pitching or by pitching and then in azimuth, and finally output the sum signal, the azimuth difference signal and the pitch difference signal at the same time. Compared with the sum-difference network in the form of a microstrip or a stripline, the sum-difference network in the form of the waveguide has the advantages of large power capacity and small loss.
However, the existing waveguide two-dimensional single-pulse sum-difference network still has the following defects:
firstly, the sum and difference networks are all composed of a single-form annular mixer, a magic T, a bridge or a branch line hybrid coupler, the structure is not compact enough, and a large space is occupied;
secondly, in a two-dimensional sum-difference network structure formed by the annular mixer and the magic T, a plurality of waveguide bends, waveguide transitional connections, matching blocks and coupling seams are arranged, and the structures are not easy to process in a high-frequency section, can bring extra errors and have large influence on electrical performance;
thirdly, in a two-dimensional sum-difference network structure formed by bridges or branch line hybrid couplers with 90-degree phase difference, each bridge or coupler needs to perform 90-degree phase compensation and is distributed scattered, so that not only is space occupied, but also extra errors are brought by machining.
Disclosure of Invention
The invention aims to provide a waveguide two-dimensional single-pulse sum-difference network to solve at least one problem of the existing waveguide two-dimensional single-pulse sum-difference network.
The technical scheme of the invention is as follows:
a waveguide two-dimensional single-pulse sum-difference network comprises a phase-shifting network, a primary 3dB coupling network and a secondary 3dB coupling network, wherein the phase-shifting network is interconnected with the primary 3dB coupling network, and the primary 3dB coupling network is interconnected with the secondary 3dB coupling network;
the length of the phase-shifting network is 1-3 waveguide wavelengths, and the length of the secondary 3dB coupling network is 0.5-1.5 waveguide wavelengths;
the phase shifting network comprises a first phase shifting waveguide, a second phase shifting waveguide, a third phase shifting waveguide and a fourth phase shifting waveguide which are parallel to each other, the first phase shifting waveguide and the second phase shifting waveguide share a waveguide narrow wall, the third phase shifting waveguide and the fourth phase shifting waveguide share a waveguide narrow wall, the first phase shifting waveguide and the third phase shifting waveguide share a waveguide wide wall, and the second phase shifting waveguide and the fourth phase shifting waveguide share a waveguide wide wall;
the first-stage 3dB coupling network comprises a first coupling waveguide I, a second coupling waveguide I, a third coupling waveguide I and a fourth coupling waveguide I which are parallel to each other, the first coupling waveguide I and the second coupling waveguide I share a waveguide narrow wall, the third coupling waveguide I and the fourth coupling waveguide I share a waveguide narrow wall, the first coupling waveguide I and the third coupling waveguide I share a waveguide wide wall, and the second coupling waveguide I and the fourth coupling waveguide I share a waveguide wide wall;
the two-stage 3dB coupling network comprises a first coupling waveguide II, a second coupling waveguide II, a third coupling waveguide II and a fourth coupling waveguide II which are parallel to each other, the first coupling waveguide II and the second coupling waveguide II share a waveguide narrow wall, the third coupling waveguide II and the fourth coupling waveguide II share a waveguide narrow wall, the first coupling waveguide II and the third coupling waveguide II share a waveguide wide wall, and the second coupling waveguide II and the fourth coupling waveguide II share a waveguide wide wall; wherein
The first phase shifting waveguide, the first coupling waveguide I and the first coupling waveguide II are interconnected to form a first network waveguide, the second phase shifting waveguide, the second coupling waveguide and the second coupling waveguide II are interconnected to form a second network waveguide, the third phase shifting waveguide, the third coupling waveguide I and the third coupling waveguide II are interconnected to form a third network waveguide, and the fourth phase shifting waveguide, the fourth coupling waveguide I and the fourth coupling waveguide II are interconnected to form a fourth network waveguide;
the openings of the first network waveguide, the second network waveguide, the third network waveguide and the fourth network waveguide at one end of the phase shifting network are respectively a port A, a port B, a port C and a port D, which are used as sum and difference network input ports and are respectively connected with antenna receiving branch ports;
openings of the first network waveguide, the second network waveguide, the third network waveguide and the fourth network waveguide at one end of the secondary 3dB coupling network are respectively called as a port E, a port F, a port G and a port H, and the ports are all used as output ports of the sum and difference network and used for providing a sum and difference function of antenna receiving branch signals.
Optionally, the first phase-shifting waveguide, the second phase-shifting waveguide, the third phase-shifting waveguide and the fourth phase-shifting waveguide of the phase-shifting network all have a phase-shifting function from-90 ° to 90 °.
Optionally, the first phase-shifting waveguide, the second phase-shifting waveguide, the third phase-shifting waveguide and the fourth phase-shifting waveguide of the phase-shifting network all have a phase-shifting function of-180 ° to 0 °.
Optionally, a first waveguide broadside coupler and a second waveguide broadside coupler formed by slotting are respectively arranged on the shared waveguide broadside walls of the first coupling waveguide i and the third coupling waveguide i and the shared waveguide broadside walls of the second coupling waveguide i and the fourth coupling waveguide i, and the first waveguide broadside coupler and the second waveguide broadside coupler form the first-stage 3dB coupling network;
and respectively slotting a first waveguide narrow-edge coupler and a second waveguide narrow-edge coupler which are formed on the shared waveguide narrow wall of the first coupling waveguide II and the second coupling waveguide II and the shared waveguide narrow wall of the third coupling waveguide II and the fourth coupling waveguide II, wherein the first waveguide narrow-edge coupler and the second waveguide narrow-edge coupler form the two-stage 3dB coupling network.
Optionally, a first waveguide narrow-edge coupler and a second waveguide narrow-edge coupler formed by slotting are respectively arranged on the shared waveguide narrow walls of the first coupling waveguide i and the second coupling waveguide i and the shared waveguide narrow walls of the third coupling waveguide i and the fourth coupling waveguide i, and the first waveguide narrow-edge coupler and the second waveguide narrow-edge coupler form the first-stage 3dB coupling network;
and respectively slotting a first waveguide broadside coupler and a second waveguide broadside coupler on the shared waveguide broadside wall of the first coupling waveguide II and the third coupling waveguide II and the shared waveguide broadside wall of the second coupling waveguide II and the fourth coupling waveguide II, wherein the first waveguide broadside coupler and the second waveguide broadside coupler form the two-stage 3dB coupling network.
Optionally, the first waveguide broadside coupler and the second waveguide broadside coupler have the same structure and are both formed by a waveguide broadside bridge, and the first waveguide broadside coupler includes two mutually parallel first longitudinal slots and second longitudinal slots which are formed in the shared waveguide broadside wall along the waveguide axis direction.
Optionally, the first waveguide broadside coupler includes a first broadside step matching block and a second broadside step matching block.
Optionally, the first waveguide broadside coupler and the second waveguide broadside coupler have the same structure and are both formed by waveguide branch-node line hybrid couplers, and the first waveguide broadside coupler comprises a first transverse slit and a second transverse slit which are formed in the common waveguide broadside wall along the direction perpendicular to the waveguide axis.
Optionally, the first waveguide narrow-side coupler and the second waveguide narrow-side coupler have the same structure and are both formed by waveguide narrow-side bridges, and the first waveguide narrow-side coupler includes a narrow-side slit formed in a shared waveguide narrow wall.
Optionally, the first waveguide narrow-side coupler includes a first narrow-side step matching block and a second narrow-side step matching block.
The invention has the following effects:
the waveguide two-dimensional single-pulse sum-difference network adopts a combination form of a 3dB waveguide wide-edge coupler and a 3dB waveguide narrow-edge coupler, the whole structure only consists of four mutually parallel waveguides, the waveguides share a waveguide wide wall and a waveguide narrow wall, and the couplers are directly connected without transition waveguides, so the structure is compact; in addition, the four waveguides are parallel to each other to form a two-layer two-dimensional plane structure, and the processing is simple and convenient.
Drawings
FIG. 1 is a schematic (perspective) view of the structure of a waveguide two-dimensional single pulse sum and difference network of the present invention;
FIG. 2 is a schematic diagram (perspective) of the phase shifting network in a waveguide two-dimensional single pulse sum-difference network of the present invention;
FIG. 3 is a schematic structural diagram (perspective) of a one-stage 3dB coupling network in a waveguide two-dimensional single-pulse sum-difference network of the present invention;
FIG. 4 is a schematic (perspective) view of the structure of a two-stage 3dB coupling network in a waveguide two-dimensional single pulse sum-difference network of the present invention;
FIG. 5 is a schematic (perspective) view of the phase shifting network in a waveguide two-dimensional single pulse sum and difference network according to the present invention;
FIG. 6 is a schematic diagram (perspective view) of the structure of the longitudinal slot portion in the first 3dB coupling network of the waveguide two-dimensional single pulse sum and difference network of the present invention;
FIG. 7 is a schematic structural diagram (perspective view) of a broadside step matching block portion of a first-order 3dB coupling network of a waveguide two-dimensional single-pulse sum-difference network of the present invention;
FIG. 8 is a schematic structural view (perspective view) of a transverse slot portion in a first order 3dB coupling network of a waveguide two-dimensional single pulse sum and difference network of the present invention;
FIG. 9 is a schematic structural diagram (perspective view) of the narrow-side slot and narrow-side step matching block portion in the first-order 3dB coupling network of the waveguide two-dimensional single-pulse sum-difference network of the present invention;
fig. 10 is a schematic diagram of a waveguide two-dimensional single pulse sum and difference network of the present invention.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the scope of the present invention.
The waveguide two-dimensional single-pulse sum-difference network of the present invention will be described in further detail with reference to fig. 1 to 10.
The invention provides a waveguide two-dimensional single pulse sum-difference network; as shown in fig. 1, the waveguide two-dimensional single pulse sum and difference network may include a phase shifting network 1, a primary 3dB coupling network 2, and a secondary 3dB coupling network 3, the phase shifting network 1 being interconnected with the primary 3dB coupling network 2, the primary 3dB coupling network 2 being interconnected with the secondary 3dB coupling network 3. Wherein, the length of the phase shifting network 1 is 1-3 waveguide wavelengths, and the length of the second-stage 3dB coupling network 3 is 0.5-1.5 waveguide wavelengths.
Specifically, as shown in fig. 2, the phase shift network 1 may include a first phase shift waveguide 11, a second phase shift waveguide 12, a third phase shift waveguide 13, and a fourth phase shift waveguide 14, which are parallel to each other; wherein the first phase-shifting waveguide 11 and the second phase-shifting waveguide 12 share a waveguide narrow wall; the third phase-shifting waveguide 13 shares a waveguide narrow wall with the fourth phase-shifting waveguide 14; the first phase-shifting waveguide 11 and the third phase-shifting waveguide 13 share a waveguide broad wall; the second phase shifting waveguide 12 shares a waveguide broad wall with the fourth phase shifting waveguide 14. The first phase-shifting waveguide 11, the second phase-shifting waveguide 12, the third phase-shifting waveguide 13, and the fourth phase-shifting waveguide 14 are specifically rectangular cavity portions (the portions are hollow structures) in fig. 2.
Specifically, as shown in fig. 3, the first-stage 3dB coupling network 2 may include a first coupling waveguide i 21, a second coupling waveguide i 22, a third coupling waveguide i 23, and a fourth coupling waveguide i 24, which are parallel to each other. The first coupling waveguide I21 and the second coupling waveguide I22 share a waveguide narrow wall; the third coupling waveguide I23 and the fourth coupling waveguide I24 share a waveguide narrow wall; the first coupling waveguide I21 and the third coupling waveguide I23 share a waveguide broad wall; the second coupling waveguide I22 shares a waveguide broad wall with the fourth coupling waveguide I24. Similarly, the first coupling waveguide i 21, the second coupling waveguide i 22, the third coupling waveguide i 23, and the fourth coupling waveguide i 24 are specifically rectangular cavity portions (the portions are hollow structures) in fig. 3.
Specifically, as shown in fig. 4, the two-stage 3dB coupling network 3 may include a first coupling waveguide ii 31, a second coupling waveguide ii 32, a third coupling waveguide ii 33, and a fourth coupling waveguide ii 34, which are parallel to each other. The first coupling waveguide II 31 and the second coupling waveguide II 32 share a waveguide narrow wall; the third coupling waveguide II 33 and the fourth coupling waveguide II 34 share a waveguide narrow wall; the first coupling waveguide II 31 and the third coupling waveguide II 33 share a waveguide broad wall; the second coupling waveguide II 32 and the fourth coupling waveguide II 34 share a waveguide broad wall. Similarly, the first coupling waveguide ii 31, the second coupling waveguide ii 32, the third coupling waveguide ii 33, and the fourth coupling waveguide ii 34 are specifically rectangular cavity portions (the portions are hollow structures) in fig. 4.
Further, as shown in fig. 5, the first phase shifting waveguide 11, the first coupling waveguide i 21 and the first coupling waveguide ii 31 are interconnected in the same straight direction to form a first network waveguide 01; the second phase shifting waveguide 12, the second coupling waveguide 22 and the second coupling waveguide II 32 are interconnected to form a second network waveguide 02; the third phase shifting waveguide 13, the third coupling waveguide I23 and the third coupling waveguide II 33 are interconnected to form a third network waveguide 03; the fourth phase shifting waveguide 14, the fourth coupling waveguide I24 and the fourth coupling waveguide II 34 are interconnected to form a fourth network waveguide 04.
Further, as shown in fig. 5, the openings of the first network waveguide 01, the second network waveguide 02, the third network waveguide 03 and the fourth network waveguide 04 at one end of the phase shifting network 1 are respectively a port a, a port B, a port C and a port D, and these four ports are all used as sum and difference network input ports and are respectively connected with the antenna receiving branch ports.
In addition, the openings of the first network waveguide 01, the second network waveguide 02, the third network waveguide 03 and the fourth network waveguide 04 at one end of the secondary 3dB coupling network 3 are respectively referred to as a port E, a port F, a port G and a port H, and the four ports are all used as output ports of a sum-difference network and are used for providing a sum-difference function of an antenna receiving branch signal.
The waveguide two-dimensional single-pulse sum-difference network adopts a combination form of a 3dB waveguide wide-edge coupler and a 3dB waveguide narrow-edge coupler, the whole structure only consists of four mutually parallel waveguides, the waveguides share a waveguide wide wall and a waveguide narrow wall, and the couplers are directly connected without transition waveguides, so the structure is compact; in addition, the four waveguides are parallel to each other to form a two-layer two-dimensional plane structure, and the processing is simple and convenient.
In the waveguide two-dimensional single-pulse sum-and-difference network, the first phase-shifting waveguide 11, the second phase-shifting waveguide 12, the third phase-shifting waveguide 13 and the fourth phase-shifting waveguide 14 all have a phase-shifting function, and specific phase-shifting can be set appropriately according to requirements.
In one embodiment, the first phase-shifting waveguide 11, the second phase-shifting waveguide 12, the third phase-shifting waveguide 13, and the fourth phase-shifting waveguide 14 each have a phase-shifting function of-90 ° to 90 °. The specific implementation manner belongs to the prior art, and can be realized by squeezing the waveguide width, widening the waveguide width, filling a medium with a certain shape in the waveguide, and a combination method thereof.
In another embodiment, the first phase-shifting waveguide 11, the second phase-shifting waveguide 12, the third phase-shifting waveguide 13 and the fourth phase-shifting waveguide 14 of the phase-shifting network 1 each have a phase-shifting function of-180 ° to 0 °; similarly, the specific implementation manner is the prior art, and may be implemented by adding a waveguide bend or other methods, or by squeezing the waveguide width, widening the waveguide width, filling the waveguide with a medium with a certain shape, or a combination thereof.
Further, in the waveguide two-dimensional single-pulse sum-difference network of the present invention, the specific arrangement of each coupling waveguide in the primary 3dB coupling network 2 and the secondary 3dB coupling network 3 may be set appropriately.
In one embodiment, the first waveguide broadside coupler 41 and the second waveguide broadside coupler 42 are respectively formed by slotting on the shared waveguide broadside walls of the first coupling waveguide I21 and the third coupling waveguide I23 and the shared waveguide broadside walls of the second coupling waveguide I22 and the fourth coupling waveguide I24; the first waveguide broadside coupler 41 and the second waveguide broadside coupler 42 mainly form a first-stage 3dB coupling network 2.
Similarly, a first waveguide narrow-side coupler 51 and a second waveguide narrow-side coupler 52 which are respectively formed by slotting on the shared waveguide narrow wall of the first coupling waveguide II 31 and the second coupling waveguide II 32 and the shared waveguide narrow wall of the third coupling waveguide II 33 and the fourth coupling waveguide II 34; the first waveguide narrow-side coupler 51 and the second waveguide narrow-side coupler 52 mainly form a two-stage 3dB coupling network 3;
in another embodiment, the first waveguide narrow-side coupler 51 and the second waveguide narrow-side coupler 52 are respectively formed by slotting on the shared waveguide narrow walls of the first coupling waveguide I21 and the second coupling waveguide I22 and the shared waveguide narrow walls of the third coupling waveguide I23 and the fourth coupling waveguide I24; the first waveguide narrow-side coupler 51 and the second waveguide narrow-side coupler 52 mainly form the first-stage 3dB coupling network 2.
Similarly, a first waveguide broadside coupler 41 and a second waveguide broadside coupler 42 are respectively formed by slotting on the shared waveguide broadside wall of the first coupling waveguide II 31 and the third coupling waveguide II 33 and the shared waveguide broadside wall of the second coupling waveguide II 32 and the fourth coupling waveguide II 34; the first waveguide broadside coupler 41 and the second waveguide broadside coupler 42 mainly form a two-stage 3dB coupling network 3.
Furthermore, in the waveguide two-dimensional single-pulse sum-difference network, the first waveguide broadside coupler 41 and the second waveguide broadside coupler 42 have the same structure and are both formed by waveguide broadside bridges; referring to fig. 6 and 7, the first waveguide broadside coupler 41 includes two parallel first and second longitudinal slots 411 and 412 that are opened in the waveguide axis direction on the common waveguide broadside wall). Further, the first waveguide broadside coupler 41 includes a first broadside step matching block 413 and a second broadside step matching block 414.
Furthermore, in the waveguide two-dimensional single-pulse sum-difference network, the first waveguide broadside coupler 41 and the second waveguide broadside coupler 42 have the same structure and are both formed by waveguide branch-node line hybrid couplers; referring to fig. 8, the first waveguide broadside coupler 41 includes a first transverse slot 415 and a second transverse slot 416 opened in the waveguide axis perpendicular direction on the common waveguide broadside wall.
Similarly, the first waveguide narrow-side coupler 51 and the second waveguide narrow-side coupler 52 have the same structure and are each formed by a waveguide narrow-side bridge, and the first waveguide narrow-side coupler 51 includes a narrow-side slit 511 formed in a common waveguide narrow wall. Further, referring to fig. 9, the first waveguide narrow-side coupler 51 includes a first narrow-side step matching block 512 and a second narrow-side step matching block 513.
The working principle of the invention is as follows:
as shown in fig. 10, the received signals of the four quadrants of the antenna enter the phase shifting network 1 of the sum-and-difference network through the four input ports of the sum-and-difference network, i.e., port a, port B, port C, and port D, and then pass through the coupling network, and then output the sum, the azimuth difference, the pitch difference, and the diagonal difference from the output ports of the sum-and-difference network, i.e., port E, port F, port G, and port H, and usually the diagonal difference is not used, and only the load is required.
The coupling network in the sum-difference network is composed of a first-stage 3dB coupling network 2 and a second-stage 3dB coupling network 3 which are composed of two waveguide broadside couplers and two waveguide narrow-side couplers, and four waveguides which are internally communicated and parallel to each other and have a two-dimensional plane structure, namely a network waveguide 01, a network waveguide 02, a network waveguide 03 and a network waveguide 04, are formed by combining the two couplers in different forms; the structure is simple and compact because the four waveguides share the waveguide wide wall and the waveguide narrow wall, and the waveguide bend used in the traditional ring mixer and the transition waveguide used in the magic T and other couplers are avoided.
In addition, through the phase modulation function of the phase shifting network 1, each coupler in the first-stage 3dB coupling network 2 can be ensured to have a 90-degree phase difference before the sum-difference operation, the phase difference required by each coupler in the second-stage 3dB coupling network 3 before the sum-difference operation is still adjusted in the phase shifting network 1 and is transmitted to the second-stage 3dB coupling network 3 through the first-stage 3dB coupling network 2, and the mode avoids the condition that each coupler in the prior art needs a phase shifting waveguide to be adjusted, so that the number of phase shifting of the waveguide is reduced, the number of discontinuous waveguide segments is greatly reduced, and the sum-difference network is simpler and more compact. The tolerance of the coupling seams such as the longitudinal seam, the transverse seam, the narrow side seam and the like in the coupler and the tolerance of the step matching block are insensitive to the electrical performance, so the requirement is not high, and the mechanical processing is also convenient.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A waveguide two-dimensional single pulse sum and difference network is characterized by comprising a phase shifting network (1), a primary 3dB coupling network (2) and a secondary 3dB coupling network (3), wherein the phase shifting network (1) is interconnected with the primary 3dB coupling network (2), and the primary 3dB coupling network (2) is interconnected with the secondary 3dB coupling network (3);
the length of the phase shifting network (1) is 1-3 waveguide wavelengths, and the length of the secondary 3dB coupling network (3) is 0.5-1.5 waveguide wavelengths;
the phase shifting network (1) comprises a first phase shifting waveguide (11), a second phase shifting waveguide (12), a third phase shifting waveguide (13) and a fourth phase shifting waveguide (14) which are parallel to each other, the first phase shifting waveguide (11) and the second phase shifting waveguide (12) share a waveguide narrow wall, the third phase shifting waveguide (13) and the fourth phase shifting waveguide (14) share a waveguide narrow wall, the first phase shifting waveguide (11) and the third phase shifting waveguide (13) share a waveguide wide wall, and the second phase shifting waveguide (12) and the fourth phase shifting waveguide (14) share a waveguide wide wall;
the primary 3dB coupling network (2) comprises a first coupling waveguide I (21), a second coupling waveguide I (22), a third coupling waveguide I (23) and a fourth coupling waveguide I (24) which are parallel to each other, the first coupling waveguide I (21) and the second coupling waveguide I (22) share a waveguide narrow wall, the third coupling waveguide I (23) and the fourth coupling waveguide I (24) share a waveguide narrow wall, the first coupling waveguide I (21) and the third coupling waveguide I (23) share a waveguide wide wall, and the second coupling waveguide I (22) and the fourth coupling waveguide I (24) share a waveguide wide wall;
the two-stage 3dB coupling network (3) comprises a first coupling waveguide II (31), a second coupling waveguide II (32), a third coupling waveguide II (33) and a fourth coupling waveguide II (34) which are parallel to each other, the first coupling waveguide II (31) and the second coupling waveguide II (32) share a waveguide narrow wall, the third coupling waveguide II (33) and the fourth coupling waveguide II (34) share a waveguide narrow wall, the first coupling waveguide II (31) and the third coupling waveguide II (33) share a waveguide wide wall, and the second coupling waveguide II (32) and the fourth coupling waveguide II (34) share a waveguide wide wall; wherein
The first phase shifting waveguide (11), the first coupling waveguide I (21) and the first coupling waveguide II (31) are interconnected to form a first network waveguide (01), the second phase shifting waveguide (12), the second coupling waveguide (22) and the second coupling waveguide II (32) are interconnected to form a second network waveguide (02), the third phase shifting waveguide (13), the third coupling waveguide I (23) and the third coupling waveguide II (33) are interconnected to form a third network waveguide (03), and the fourth phase shifting waveguide (14), the fourth coupling waveguide I (24) and the fourth coupling waveguide II (34) are interconnected to form a fourth network waveguide (04);
openings of the first network waveguide (01), the second network waveguide (02), the third network waveguide (03) and the fourth network waveguide (04) at one end of the phase shifting network (1) are respectively a port A, a port B, a port C and a port D, and the ports are used as sum and difference network input ports and are respectively connected with antenna receiving branch ports;
the openings of the first network waveguide (01), the second network waveguide (02), the third network waveguide (03) and the fourth network waveguide (04) at one end of the second-stage 3dB coupling network (3) are respectively called as a port E, a port F, a port G and a port H, and all the ports are used as output ports of the sum and difference network and are used for providing a sum and difference function of an antenna receiving branch signal.
2. The waveguide two-dimensional single pulse sum and difference network according to claim 1, characterized in that the first phase shifting waveguide (11), the second phase shifting waveguide (12), the third phase shifting waveguide (13) and the fourth phase shifting waveguide (14) of the phase shifting network (1) each have a phase shifting function of-90 ° to 90 °.
3. The waveguide two-dimensional single pulse sum and difference network according to claim 1, characterized in that the first phase shifting waveguide (11), the second phase shifting waveguide (12), the third phase shifting waveguide (13) and the fourth phase shifting waveguide (14) of the phase shifting network (1) each have a phase shifting function of-180 ° to 0 °.
4. The waveguide two-dimensional single-pulse sum-difference network according to claim 1, characterized in that a first waveguide broadside coupler (41) and a second waveguide broadside coupler (42) are respectively formed by slotting on a common waveguide broadside wall of the first coupling waveguide i (21) and the third coupling waveguide i (23) and a common waveguide broadside wall of the second coupling waveguide i (22) and the fourth coupling waveguide i (24);
and a first waveguide narrow-edge coupler (51) and a second waveguide narrow-edge coupler (52) which are respectively formed by slotting on the shared waveguide narrow wall of the first coupling waveguide II (31) and the second coupling waveguide II (32) and the shared waveguide narrow wall of the third coupling waveguide II (33) and the fourth coupling waveguide II (34).
5. The waveguide two-dimensional single-pulse sum-difference network according to claim 1, characterized in that a first waveguide narrow-side coupler (51) and a second waveguide narrow-side coupler (52) are respectively formed by slotting on a common waveguide narrow wall of the first coupling waveguide i (21) and the second coupling waveguide i (22) and a common waveguide narrow wall of the third coupling waveguide i (23) and the fourth coupling waveguide i (24);
and a first waveguide broadside coupler (41) and a second waveguide broadside coupler (42) which are respectively formed by slotting on the shared waveguide broadside wall of the first coupling waveguide II (31) and the third coupling waveguide II (33) and the shared waveguide broadside wall of the second coupling waveguide II (32) and the fourth coupling waveguide II (34).
6. A waveguide two-dimensional single-pulse sum-difference network according to claim 4 or 5, characterized in that the first waveguide broadside coupler (41) and the second waveguide broadside coupler (42) have the same structure and are both formed by waveguide broadside bridges, and the first waveguide broadside coupler (41) comprises a first longitudinal slot (411) and a second longitudinal slot (412) which are parallel to each other and are arranged on a common waveguide broadside wall along the direction of the waveguide axis.
7. The waveguide two-dimensional single pulse sum and difference network according to claim 6, characterized in that the first waveguide broadside coupler (41) comprises a first broadside step matching block (413) and a second broadside step matching block (414).
8. A waveguide two-dimensional single-pulse sum-difference network according to claim 4 or 5, characterized in that the first waveguide broadside coupler (41) and the second waveguide broadside coupler (42) are identical in structure and are both formed by waveguide stub hybrid couplers, and the first waveguide broadside coupler (41) comprises a first transverse slit (415) and a second transverse slit (416) which are arranged on a common waveguide broadside wall along the direction perpendicular to the waveguide axis.
9. A waveguide two-dimensional single-pulse sum-difference network according to claim 4 or 5, characterized in that said first waveguide narrow-side coupler (51) and said second waveguide narrow-side coupler (52) are identical in structure and each formed by a waveguide narrow-side bridge, and said first waveguide narrow-side coupler (51) comprises a narrow-side slit (511) formed in a common waveguide narrow wall.
10. The waveguide two-dimensional single pulse sum and difference network according to claim 9, characterized in that the first waveguide narrow-side coupler (51) comprises a first narrow-side step matching block (512) and a second narrow-side step matching block (513).
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| CN108539339B (en) * | 2018-04-24 | 2019-09-06 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Strip line/line of rabbet joint mixing broadband two dimension sum-difference network |
| CN108872927A (en) * | 2018-05-09 | 2018-11-23 | 中国船舶重工集团公司第七二三研究所 | A kind of microwave and millimeter wave broadband sum-difference network and its construction method |
| CN109818114B (en) * | 2018-12-13 | 2021-06-08 | 西北核技术研究所 | Compact high-power-capacity waveguide phase shifter and waveguide phase shifting method |
| CN115051133B (en) * | 2022-07-19 | 2023-11-17 | 北京星英联微波科技有限责任公司 | Waveguide broadside broadband coupling bridge |
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