CN116190961A - A millimeter-wave one-to-three-waveguide power splitter carrying DGS - Google Patents

Abstract

The invention discloses a millimeter wave one-to-three waveguide power divider, which has the power distribution ratio of 1:1, the output end of the equal power divider is respectively connected with a power distribution ratio carrying DGS, wherein the power distribution ratio is 2:1, wherein adjacent output ends of the two unequal power splitters are respectively connected with a joint circuit, the output end of the joint circuit is one power splitting output port, the other two output ends of the two unequal power splitters are respectively connected with an H-plane 90-degree bent waveguide with a phase compensation function, and the output ends of the two H-plane 90-degree bent waveguides are the other two power splitting output ports, so that the millimeter wave band one-to-three waveguide power splitter is formed. The power divider and the combiner are designed by adopting a multi-step impedance transformation technology, so that a wide bandwidth can be realized. The DGS structure added by the invention plays a role in inhibiting out-of-band harmonic wave, and meanwhile, the sprayed metal after 3D printing processing can be more uniform.

Description

A millimeter-wave one-to-three-waveguide power splitter carrying DGS

technical field

The invention belongs to the technical field of radio frequency and microwave power synthesis, and in particular relates to a millimeter-wave one-to-three waveguide power splitter carrying DGS.

Background technique

Power divider is a microwave passive device widely used in satellite communication, radar detection, navigation and other fields. The power splitter is to divide the energy of one input signal into two or multiple outputs with equal or unequal energy to meet the multi-output needs of the system; it can also conversely combine the energy of multiple signals into one output, which can also be called at this time As a combiner, it can be used to meet the needs of high power output of the system.

In the millimeter wave band, compared with power splitters of other types of feeders, waveguide power splitters have the advantages of low loss, good standing waves, and wide transmission bandwidth. The number of channels of the existing power dividers is mostly 2 to the nth power, and it is difficult to realize a power divider with odd or even channels.

Multi-channel waveguide power splitters generally have multiple regular or irregular protrusions or curved structures, which lead to complex out-of-band harmonics of the signal and introduce interference.

Contents of the invention

In order to solve the problems existing in the prior art, the present invention provides a millimeter-wave one-to-three-waveguide power splitter with a DGS structure. Both the power splitter and the combiner are designed with multi-step impedance transformation technology, which can The bandwidth is wide; the DGS structure added by the present invention plays a role in suppressing out-of-band harmonics.

In order to achieve the above object, the technical solution adopted by the present invention is: a millimeter-wave one-to-three waveguide power splitter carrying DGS, including equal power splitter, unequal power splitter, combiner and H-plane 90° curved waveguide , the equal power divider carries a DGS, and the two output ends of the equal power divider are respectively connected to the unequal power divider carrying the DGS. The power distribution ratio of the unequal power divider is 2:1, and the two unequal power dividers The adjacent output ends of the combiner are respectively connected to the combiner, the output end of the combiner is one of the output ports of the power division, and the other output end of the unequal power divider is respectively connected to the H-plane 90° bend waveguide with phase compensation function, the two The output end of the H-plane 90°bent waveguide is the other two power splitter output ports, forming a millimeter-wave band one-point three-waveguide power splitter, and the input and output ports of the equal power splitter, unequal power splitter, and combiner are all A multi-step ladder impedance transformation structure is adopted.

The waveguide corner of the equal power splitter uses a 45° cut angle to make a 90° turn.

Set a DGS hole at the input port of the equal power divider.

The unequal power divider realizes unequal power splitting by changing the position of the protrusion away from the center line, the width and height of the protrusion.

Add a DGS hole to the input port of the unequal power splitter.

The ladder matching structure of the input end of the equal power divider is connected to the first port of the equal power divider of the standard waveguide port BJ320, and the first port of the equal power divider is directly connected to the first matching section of the input equal power divider, and then connected to the input equal power divider in turn The second matching section, the input matching section; the ladder matching structure of the output end is connected to the second port of the equal power divider of the standard waveguide port BJ320 and the T-junction, and the T-junction is directly connected to the first output matching section of the equal power divider, and connected in turn The second output matching section of the equal power divider and the third output matching section of the equal power divider are connected to the second port of the equal power divider.

The ladder matching structure of the input end of the unequal power divider is connected to the first port of the unequal power divider of the standard waveguide port BJ320, and the first port of the unequal power divider is directly connected to the first input matching section of the unequal power divider, and then connected to the The second input matching section of the equal power divider; the ladder matching structure at the output end is connected to the second port of the unequal power divider of the standard waveguide port BJ320 and the T-junction of the unequal power divider, and the T-junction of the unequal power divider is directly connected The first output matching section of the unequal power divider is connected to the second output matching section of the unequal power divider, and finally the second port of the unequal power divider is connected.

The ladder matching structure of the input end of the combiner is connected to the first port of the combiner of the standard waveguide port BJ320, the first port of the combiner is directly connected to the first input matching section of the combiner, and then connected to the second input matching section of the combiner ;The ladder matching structure at the output end is connected to the second port of the combiner of the standard waveguide port BJ320 and the T-junction of the combiner. The T-junction of the combiner is directly connected to the first output matching node of the combiner, and then connected to the second Connect the output matching section, the third connection output matching section of the combiner, and then connect the second port of the combiner.

The H-plane 90° bend waveguide with phase compensation uses two sizes of 403 chamfer 2.4×90° and 404 chamfer (2.4+7.112)×90° at the 90° turn, and the input port 402 is 4.4mm long.

Compared with the prior art, the present invention has at least the following beneficial effects:

Both the power divider and the combiner of the present invention adopt the multi-step impedance transformation technology, and realize the excellent performances such as small insertion loss, relatively consistent amplitude and phase, and good standing wave ratio in a wide bandwidth: the DGS added in the present invention is for band External harmonics have a better suppression effect, reduce interference, and at the same time make the metal spraying more uniform after subsequent 3D printing processing; the design of the invention is simple, and only need to design each component independently and connect them directly without optimizing the whole simulation.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a schematic structural diagram of an embodiment of the present invention without DGS.

Figure 3 is a schematic diagram of the structure of each part of the components in the embodiment of the present invention, wherein (a) is an equal power splitter with a power distribution ratio of 1:1, (b) is an unequal power splitter with a power distribution ratio of 2:1, (c) is a combiner, (d) is an H-plane 90° curved waveguide with phase compensation.

Fig. 4 is the simulation result schematic diagram of the embodiment of the present invention, wherein (a) is the insertion loss diagram of the one-to-three power splitter, (b) the phase diagram of the one-to-three power splitter, (c) is the resident of the one-to-three power splitter Porto.

Fig. 5 is the comparison chart of the simulation results of two types of one-point three-power splitters carrying and not carrying DGS in the embodiment of the present invention, wherein (a) is a simulation result figure of one-point three-power splitters not carrying DGS, and (b) is Simulation result diagram of one-point three-power splitter with DGS.

In the figure: 1 is equal power splitter, 2 is unequal power splitter, 3 is combiner, 4 is H plane 90° bend waveguide, 5 is DGS hole.

Detailed ways

The present invention will be described in detail through the accompanying drawings and examples below. It must be pointed out that this example is only used to further illustrate the present invention, and should not be construed as limiting the protection scope of the present invention.

Referring to Fig. 1, the present invention provides a millimeter-wave one-to-three waveguide power splitter carrying DGS (Defected Ground Structure), including: an equal power splitter 1 with a power distribution ratio of 1:1 carrying DGS5, and an equal power splitter The output terminals of 1 are respectively connected to the unequal power divider 2 carrying DGS5 with a power distribution ratio of 2:1, and the adjacent output terminals of the two unequal power dividers 2 are respectively connected to the combiner 3, and the output of the combiner 3 end is one of the output ports of the power divider, and the other two output ends of the two unequal power dividers 2 are respectively connected to the H-plane 90° bend waveguide 4 with phase compensation, and the output ends of the two H-plane 90° bend waveguides are The other two power division output ports form a one-to-three-waveguide power divider in the millimeter wave band.

Referring to Figure 3, the ladder matching structure at the input end of the equal power divider with a power distribution ratio of 1:1 is connected to the first port 101 of the equal power divider of the standard waveguide port BJ320, and the first port 101 of the equal power divider is directly connected to the input equal power The first matching section 102 of the splitter is connected to the second matching section 103 and the input matching section 104 of the input equal power splitter in turn; the ladder matching structure at the output end is connected to the second port 109 of the equal power splitter and the T-junction of the standard waveguide port BJ320 105, the T-junction 105 is directly connected to the first output matching section 106 of the equal power divider, connected to the second output matching section 107 of the equal power divider, the third output matching section 108 of the equal power divider, and then connected to the first output matching section 108 of the equal power divider. Two ports 109; the width of the first output matching section 106 of the equal power divider, the second output matching section 107 of the equal power divider and the third output matching section 108 of the equal power divider gradually decrease; the power distribution ratio is 2:1 The ladder matching structure at the input end of the unequal power divider is connected to the first port 201 of the unequal power divider of the standard waveguide port BJ320, and the first port 201 of the unequal power divider is directly connected to the first input matching section 202 of the unequal power divider. Then connect the second input matching section 203 of the unequal power divider; the ladder matching structure at the output end is connected to the second port 207 of the unequal power divider of the standard waveguide port BJ320 and the T-junction 204 of the unequal power divider, the unequal power divider The T-junction 204 of the unequal power divider is directly connected to the first output matching section 205 of the unequal power divider, then connected to the second output matching section 206 of the unequal power divider, and finally connected to the second port 207 of the unequal power divider, and the combiner (3 ) is connected to the first port 301 of the combiner of the standard waveguide port BJ320, the first port 301 of the combiner is directly connected to the first input matching section 302 of the combiner, and then connected to the second input matching section of the combiner Section 302; the ladder matching structure at the output end is connected to the second port 308 of the combiner of the standard waveguide port BJ320 and the T-junction 304 of the combiner, and the T-junction 304 of the combiner is directly connected to the first output matching section 305 of the combiner, followed by Connect the second output matching section 306 of the combiner, the third output matching section 307 of the combiner, and then connect the second port 308 of the combiner.

In this preferred embodiment, as shown in Figure 1 and Figure 2, the size of the input waveguide port and the three output ports of the one-point three-power splitter are all the size of the standard waveguide port BJ320, 7.112mm×3.556mm, three The dimensions of the DGS holes are 4mm in length, 0.2mm in width and 3mm in thickness.

See Figure 3. In the embodiment of the present invention, the equal power splitter with a power distribution ratio of 1:1 has a completely symmetrical structure. The first ports 101 and 109 of the equal power splitter are both the size of the standard waveguide port BJ320, and the first port 101 of the equal power splitter is Width 7.112mm, length 4mm, equal power divider second port 109 width 7.112mm, length 6mm, input equal power divider first matching section 102 width 11.9mm, length 2.6mm, input equal power divider second matching section 103 Width 7.3mm, length 1.8mm, input matching section 104 width 9.6mm, length 3mm, T-junction 105 width 6.8mm, length 10.8mm, equal power splitter first output matching section 106 width 6.1mm, length 4.2mm, etc. The second output matching section 107 of the power divider is 5.6mm wide and 3.5mm long, the third output matching section 108 of the equal power divider is 5.4mm wide and 2.5mm long, the a of the 45°cutting angle 110 is 4.3mm, and the center is raised 208 The width is 1mm, the height is 2.9mm, and the power distribution ratio is 1:1. In the embodiment of the present invention, the power distribution ratio of the unequal power divider is 2:1. The first ports 201 and 207 of the unequal power divider are both the size of the standard waveguide port BJ320. The width of the first port 201 of the unequal power divider is 7.112 mm, length 3.2mm, the second port 207 of the unequal power divider is 7.112mm wide and 1.5mm long, the first input matching section 202 of the unequal power divider is 6.5mm wide and 1.6mm long, the second input of the unequal power divider The matching section 203 is 6.1mm wide and 1.3mm long, the T-junction 204 of the unequal power divider is 6.7mm wide and 8.7mm long, and the first output matching section 205 of the unequal power divider is 5.5mm wide and 1.3mm long, with unequal power The second output matching section 206 of the splitter has a width of 5.8 mm and a length of 1.7 mm. The protrusion 208 has a width of 0.7 mm and a height of 3.2 mm. The deviation from the center line b is 1.2 mm, realizing an unequal power splitter with a power distribution ratio of 2:1. The structure in the embodiment of the present invention is completely symmetrical. The first ports 301 and 308 of the combiner are both the size of the standard waveguide port BJ320. The first port 301 of the combiner is 7.112mm wide and 2.3mm long, and the second port of the combiner 308 is 7.112mm wide and 4mm long. The first input matching section 302 of the combiner is 10.7mm wide and 1.3mm long. The second input matching section 302 of the combiner is 5.9mm wide and 2.2mm long. The T-junction 304 of the combiner is wide 6.7mm, length 9.2mm, the first output matching section 305 of the combiner is 9.8mm wide and 2.2mm long, the second connecting output matching section 306 of the combiner is 6.6mm wide, and 1.2mm long, the third connecting output matching section of the combiner The section 307 is 11 mm wide and 1.6 mm long, and the central protrusion 309 is 0.8 mm wide and 2.5 mm high to realize a combiner. In the H-plane 90° curved waveguide (d) with phase compensation function in the embodiment of the present invention, the ports 401 and 402 are both the size of the standard waveguide port BJ320, the port 401 is 7.112mm wide and 16.1mm long, and the port 402 is 7.112mm wide and long 4.4mm, curved structure 403 chamfer 2.4×90°, curved structure 404 chamfer (2.4+7.112)×90°, realize H-plane 90° curved waveguide with phase compensation function.

Fig. 4 is a simulation result diagram of the embodiment of the present invention, it can be seen from the diagram that in the frequency range of 35GHz-40GHz, the insertion loss is <0.57dB, the phase difference is <9.7°, and the standing wave is <1.33. It can be clearly seen from the comparison chart of the simulation results in Figure 5 that the out-of-band harmonics of the one-point three-power splitter carrying DGS are obviously suppressed.

Claims (9)

1. The millimeter wave one-to-three waveguide power divider is characterized by comprising an equal power divider (1), an unequal power divider (2), a combiner (3) and an H-plane 90-degree bent waveguide (4), wherein the equal power divider (1) carries one DGS, two output ends of the equal power divider (1) are respectively connected with the unequal power divider (2) carrying the DGS, the power distribution ratio of the unequal power divider (2) is 2:1, adjacent output ends of the two unequal power dividers are respectively connected with a joint circuit breaker (3), the output end of the combiner (3) is one power division output port, the other output end of the unequal power divider (2) is respectively connected with the H-plane 90-degree bent waveguide (4) with a phase compensation function, the output ends of the two H-plane 90-degree bent waveguides (4) are the other two power division output ports, and a stepped impedance conversion structure is adopted for the equal power divider (1), the unequal power divider (2) and the combiner (3).

2. The DGS-carrying millimeter wave one-to-three waveguide power divider of claim 1, wherein the waveguide corner of the power divider (1) makes a 90 ° turn using a 45 ° cut angle.

3. The millimeter wave one-to-three waveguide power divider carrying DGS according to claim 1, wherein a DGS orifice is provided at the input port of the power divider (1).

4. The DGS-carrying millimeter wave one-to-three waveguide power divider of claim 1, wherein the unequal power divider (2) achieves unequal power ratios by varying the position of the protrusion off-center line, the width and height of the protrusion.

5. The millimeter wave one-to-three waveguide power divider carrying DGS according to claim 1, wherein a DGS orifice is added at the input port of the unequal power divider (2).

6. The millimeter wave one-to-three waveguide power divider carrying DGS according to claim 1, wherein the step matching structure of the input end of the power divider (1) is connected to the first port (101) of the power divider of the standard waveguide port BJ320, the first port (101) of the power divider is directly connected to the first matching section (102) of the power divider, and is sequentially connected to the second matching section (103) of the power divider and the input matching section (104); the stepped matching structure of the output end is connected to the second port (109) of the equal power divider and the T-shaped junction (105) of the standard waveguide port BJ320, the T-shaped junction (105) is directly connected with the first output matching section (106) of the equal power divider, and sequentially connected with the second output matching section (107) of the equal power divider and the third output matching section (108) of the equal power divider, and then connected with the second port (109) of the equal power divider.

7. The millimeter wave one-to-three waveguide power divider carrying DGS according to claim 1, wherein the step matching structure of the input end of the unequal power divider is connected to the first port (201) of the unequal power divider of the standard waveguide port BJ320, and the first port (201) of the unequal power divider is directly connected to the first input matching section (202) of the unequal power divider and then to the second input matching section (203) of the unequal power divider; the step matching structure of the output end is connected to the unequal power divider second port (207) of the standard waveguide port BJ320 and the unequal power divider T-shaped junction (204), the unequal power divider T-shaped junction (204) is directly connected with the unequal power divider first output matching section (205), then connected with the unequal power divider second output matching section (206), and finally connected with the unequal power divider second port (207).

8. The DGS-carrying millimeter wave one-to-three waveguide power divider of claim 1, wherein the stepped matching structure of the input of the combiner (3) is connected to the one port (301) of the combiner Lu Qidi of the standard waveguide port BJ320, and the one port (301) of the combiner Lu Qidi is directly connected to the first input matching section (302) of the combiner and then to the second input matching section (302) of the combiner; the step matching structure of the output end is connected to the two ports (308) of the combiner Lu Qidi of the standard waveguide port BJ320 and the T-shaped junction (304) of the combiner, the T-shaped junction (304) of the combiner is directly connected with the first output matching node (305) of the combiner, the second output matching node (306) of the combiner is sequentially connected, the third output matching node (307) of the combiner is connected with the Lu Qidi, and the second port (308) of the combiner is connected with the third output matching node.

9. The DGS-carrying millimeter wave one-to-three waveguide power divider of claim 1, wherein the H-plane 90 ° bend waveguide (4) with phase compensation is chamfered by using 90 ° turns 403 to chamfer 2.4×90 ° and 404 to chamfer (2.4+7.112) ×90° two dimensions and input port 402 is 4.4mm long.

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