A millimeter wave waveguide filter power divider

Abstract

The application discloses a millimeter wave waveguide filtering power divider, which comprises an input port feeding part; the input port feeding part is arranged at the front end of a waveguide filtering part; the front end of a first waveguide filtering and power dividing part is connected with the upper side of the rear end of the waveguide filtering part; a first output port feeding part is arranged at the rear end of the first waveguide filtering and power dividing part; the front end of a second waveguide filtering and power dividing part is connected with the lower side of the rear end of the waveguide filtering part; a second output port feeding part is arranged at the rear end of the second waveguide filtering and power dividing part; the waveguide filtering part comprises a first waveguide part; SSPP blocks are symmetrically arranged on the upper side and the lower side of the first waveguide part; the first waveguide filtering and power dividing part comprises a second waveguide part; an SSPP block is arranged on the upper side of the second waveguide part; the second waveguide filtering and power dividing part comprises a third waveguide part; and an SSPP block is arranged on the lower side of the third waveguide part; the application has the advantages of wide filtering frequency, good impedance matching performance and good frequency selectivity, and is suitable for a millimeter wave communication system.

Description

Technical Field

[0001] This invention belongs to the field of microwave passive device technology, and specifically relates to a millimeter-wave waveguide filter power divider. Background Technology

[0002] A power divider is a passive device used to split the electromagnetic energy transmitted from the input port into two or more paths of equal or unequal quantity. Its performance has a significant impact on the overall performance of the system. In practical applications, bandpass filters and power dividers are often cascaded to filter out out-of-band interference signals and reduce signal interference between communication systems. However, existing cascading methods often result in significant losses for the communication system. Summary of the Invention

[0003] To address the technical problems existing in the prior art, this invention provides a millimeter-wave waveguide filter power divider to solve the technical problem that often causes significant losses in communication systems when bandpass filters and power dividers are cascaded.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] This invention provides a millimeter-wave waveguide filter power divider, including an input port feed section, a waveguide filter section, a first waveguide power divider filter section, a second waveguide power divider filter section, a first output port feed section, and a second output port feed section;

[0006] The input port power supply section is located at the front end of the waveguide filter section. The front end of the first waveguide power divider filter section is connected to the upper side of the rear end of the waveguide filter section. The first output port power supply section is located at the rear end of the first waveguide power divider filter section. The front end of the second waveguide power divider filter section is connected to the lower side of the rear end of the waveguide filter section. The second output port power supply section is located at the rear end of the second waveguide power divider filter section.

[0007] The waveguide filtering section includes a first waveguide section, on which SSPP blocks are symmetrically arranged on the upper and lower sides; the first waveguide power distribution section includes a second waveguide section, on which SSPP blocks are arranged on the upper side; the second waveguide power distribution section includes a third waveguide section, on which SSPP blocks are arranged on the lower side.

[0008] Furthermore, the input port feed section, the first output port feed section, and the second output port feed section all adopt the WR-34 standard rectangular waveguide.

[0009] Further, the input port transition part is arranged between the input port feeding part and the waveguide filter part, and is used for filtering from the input port feeding part to the waveguide filter part.

[0010] Further, the input port transition part comprises a fourth waveguide part, and SSPP blocks are symmetrically arranged on the upper and lower sides of the fourth waveguide part; wherein the width dimension of the fourth waveguide part gradually decreases from the front end to the rear end of the input port transition part, and the height dimension of the SSPP blocks in the fourth waveguide part gradually increases.

[0011] Further, the width of the first waveguide part is matched with the low-frequency cutoff frequency of the waveguide filter part, and the size and arrangement period of the SSPP blocks in the first waveguide part are matched with the high-frequency cutoff frequency of the waveguide filter part.

[0012] Further, the cutoff frequencies of the first waveguide power division filter part and the second waveguide power division filter part are the same as the cutoff frequency of the waveguide filter part.

[0013] Further, the first output port transition part is arranged between the first waveguide power division filter part and the first output port feeding part, and is used for transition from the first waveguide power division filter part to the first output port feeding part.

[0014] Further, the first output port transition part comprises a fifth waveguide part, and an SSPP block is arranged on the upper side of the fifth waveguide part; wherein the width dimension of the fifth waveguide part gradually increases from the front end to the rear end of the first output port transition part, and the height dimension of the SSPP block in the fifth waveguide part gradually decreases.

[0015] Further, the second output port transition part is arranged between the second waveguide power division filter part and the first output port feeding part, and is used for transition from the second waveguide power division filter part to the first output port feeding part.

[0016] Further, the second output port transition part comprises a sixth waveguide part, and an SSPP block is arranged on the lower side of the sixth waveguide part; wherein the width dimension of the sixth waveguide part gradually increases from the front end to the rear end of the second output port transition part, and the height dimension of the SSPP block in the sixth waveguide part gradually decreases.

[0017] Compared with the prior art, the present application has the following beneficial effects:

[0018] The application provides a millimeter wave waveguide filtering power divider, which integrates a waveguide filtering part, a first waveguide power dividing filtering part and a second waveguide power dividing filtering part, realizes the integration of filtering function and power dividing function in the same passive device, and realizes the equal-amplitude and in-phase output of electromagnetic energy from two output port feeding parts; wherein the waveguide filtering part is provided with SSPP blocks symmetrically on the upper and lower sides of the first waveguide part to realize the band-pass filtering function; the two waveguide power dividing parts are provided with SSPP blocks on the upper side or the lower side of the waveguide part and are respectively arranged on the upper and lower sides of the rear end of the waveguide filtering part, so that the equal-amplitude and in-phase power dividing function can be realized; the millimeter wave waveguide filtering power divider has the advantages of compact structure, wide filtering frequency, good impedance matching performance, good frequency selectivity, small output difference of the two output ports and uniform power distribution amplitude, and is suitable for a millimeter wave communication system.

[0019] Further, the input port feeding part and the two output port feeding parts are both WR-34 standard rectangular waveguides, which ensures the adaptability of the millimeter wave waveguide filtering power divider and improves the universality of the equipment.

[0020] Further, the input port transition part is arranged, and the waveguide size and the SSPP block size of the input port transition part are gradually changed, so as to ensure the impedance matching performance.

[0021] Further, the cutoff frequencies of the two waveguide power dividing filtering parts are the same as the cutoff frequency of the waveguide filtering part, so that the equal-amplitude and in-phase power dividing function is realized. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The overall structure schematic diagram of the millimeter wave waveguide filtering power divider described in the embodiment;

[0023] Figure 2 The top view of the millimeter wave waveguide filtering power divider described in the embodiment;

[0024] Figure 3 The side view of the millimeter wave waveguide filtering power divider described in the embodiment;

[0025] Figure 4 The top view of the input port feeding part, the input port transition part and the waveguide filtering part in the embodiment;

[0026] Figure 5 The side view of the input port feeding part, the input port transition part and the waveguide filtering part in the embodiment;

[0027] Figure 6 The top view of the first waveguide power dividing filtering part, the first output port transition part and the first output port feeding part in the embodiment;

[0028] Figure 7 side view of a second output port transition section and a second output port feed section for an embodiment;

[0029] Figure 8 S parameter magnitude plot for a millimeter wave waveguide filter power splitter for an embodiment;

[0030] Figure 9 S parameter phase plot for a millimeter wave waveguide filter power splitter for an embodiment.

[0031] Wherein, 1 input port feeding part, 2 input port transition part, 3 waveguide filter part, 4 first waveguide power division filter part, 5 second waveguide power division filter part, 6 first output port transition part, 7 second output port transition part, 8 first output port feeding part, 9 second output port feeding part;21 input transition section rectangular waveguide part, 22 input transition section double-sided SSPP unit;211 input transition section first rectangular waveguide section, 212 input transition section second rectangular waveguide section, 213 input transition section third rectangular waveguide section, 214 input transition section fourth rectangular waveguide section, 215 input transition section fifth rectangular waveguide section, 216 input transition section sixth rectangular waveguide section, 217 input transition section seventh rectangular waveguide section, 218 input transition section eighth rectangular waveguide section;221 input transition section first double-sided SSPP block, 222 input transition section second double-sided SSPP block, 223 input transition section third double-sided SSPP block, 224 input transition section fourth double-sided SSPP block, 225 input transition section fifth double-sided SSPP block, 226 input transition section sixth double-sided SSPP block, 227 input transition section seventh double-sided SSPP block, 228 input transition section eighth double-sided SSPP block;31 filter section rectangular waveguide part, 32 filter section double-sided SSPP unit;41 first curved waveguide power division part, 42 first straight waveguide power division part;61 first output transition section rectangular waveguide part, 62 first output transition section single-sided SSPP unit;71 second output transition section rectangular waveguide part, 72 second output transition section single-sided SSPP unit;711 second output transition section first rectangular waveguide section, 712 second output transition section second rectangular waveguide section, 713 second output transition section third rectangular waveguide section, 714 second output transition section fourth rectangular waveguide section, 715 second output transition section fifth rectangular waveguide section, 716 second output transition section sixth rectangular waveguide section, 717 second output transition section seventh rectangular waveguide section, 718 second output transition section eighth rectangular waveguide section;721 second output transition section first SSPP block, 722 second output transition section second SSPP block, 723 second output transition section third SSPP block, 724 second output transition section fourth SSPP block, 725 second output transition section fifth SSPP block, 726 second output transition section sixth SSPP block, 727 second output transition section seventh SSPP block, 728 second output transition section eighth SSPP block. DETAILED DESCRIPTION

[0032] In order to make the technical problems solved by the present application, the technical solutions and beneficial effects more clearly understood, the following specific embodiments, the present application is further described in detail. It should be understood that the specific embodiments described herein are merely intended to explain the present application, and are not intended to limit the present application.

[0033] The application provides a millimeter wave waveguide filter power divider, which comprises an input port feeding part 1, an input port transition part 2, a waveguide filter part 3, a first waveguide filter power division part 4, a second waveguide filter power division part 5, a first output port transition part 6, a second output port transition part 7, a first output port feeding part 8 and a second output port feeding part 9.

[0034] The input port feeding part 1 is used for inputting electromagnetic energy, and the input port feeding part 1 is arranged at the front end of the input port transition part 2; the input port transition part 2 is used for the transition of the input port feeding part 1 to the waveguide filter part 3, the front end of the input port transition part 2 is connected with the input port feeding part 1, and the rear end of the input port transition part 2 is connected with the front end of the waveguide filter part 3; the waveguide filter part 3 is used for realizing a filtering function; the first waveguide filter power division part 4 and the second waveguide filter power division part 5 are both used for realizing a power division function; the front end of the first waveguide filter power division part 4 is connected with the upper side of the rear end of the waveguide filter part 3, and the front end of the second waveguide filter power division part 5 is connected with the lower side of the rear end of the waveguide filter part 3; preferably, the cutoff frequencies of the first waveguide filter power division part 4 and the second waveguide filter power division part 5 are the same as the cutoff frequency of the waveguide filter part 3.

[0035] The first output port transition part 6 is arranged between the first waveguide filter power division part 4 and the first output port feeding part 8, and the first output port transition part 6 is used for the transition of the first waveguide filter power division part 4 to the first output port feeding part 8; the first output port feeding part 8 is used for outputting a first electromagnetic signal after filtering and power division; wherein the front end of the first output port transition part 6 is connected with the rear end of the first waveguide filter power division part 4, and the rear end of the first output port transition part 6 is connected with the first output port feeding part 8.

[0036] The second output port transition part 7 is arranged between the second waveguide filter power division part 5 and the second output port feeding part 9, and the second output port transition part 7 is used for the transition of the second waveguide filter power division part 5 to the second output port feeding part 9; the second output port feeding part 9 is used for outputting a second electromagnetic signal after filtering and power division; wherein the front end of the second output port transition part 7 is connected with the rear end of the second waveguide filter power division part 5, and the rear end of the second output port transition part 7 is connected with the second output port feeding part 9.

[0037] In the application, the input port feeding part 1, the first output port feeding part 8 and the second output port feeding part 9 all adopt WR-34 standard rectangular waveguide.

[0038] In the application, the waveguide filter part 3 comprises a first waveguide part, and SSPP blocks are symmetrically arranged on the upper and lower sides of the first waveguide part; the width of the first waveguide part matches the low-frequency cutoff frequency of the waveguide filter part 3; the size and arrangement period of the SSPP blocks in the first waveguide part match the high-frequency cutoff frequency of the waveguide filter part 3; the first waveguide power division part 4 comprises a second waveguide part, and an SSPP block is arranged on the upper side of the second waveguide part; the second waveguide power division part 5 comprises a third waveguide part, and an SSPP block is arranged on the lower side of the third waveguide part; the input port transition part 2 comprises a fourth waveguide part, and SSPP blocks are symmetrically arranged on the upper and lower sides of the fourth waveguide part; in the direction from the front end to the rear end of the input port transition part 2, the width size of the fourth waveguide part gradually decreases, and the height size of the SSPP blocks in the fourth waveguide part gradually increases; the first output port transition part 6 comprises a fifth waveguide part, and an SSPP block is arranged on the upper side of the fifth waveguide part; in the direction from the front end to the rear end of the first output port transition part 6, the width size of the fifth waveguide part gradually increases, and the height size of the SSPP blocks in the fifth waveguide gradually decreases; the second output port transition part 7 comprises a sixth waveguide part, and an SSPP block is arranged on the lower side of the sixth waveguide part; in the direction from the front end to the rear end of the second output port transition part 7, the width size of the sixth waveguide part gradually increases, and the height size of the SSPP blocks in the sixth waveguide part gradually decreases.

[0039] It should be noted that the SSPP block is a spoof surface plasmon polariton (SSPP) in the form of a rectangular parallelepiped.

[0040] Working principle:

[0041] The millimeter wave waveguide filter power divider provided by the application has the advantages that the electromagnetic signal is transmitted from the input port to the output port through the waveguide filter part, the waveguide power division part and the transition part, and the electromagnetic signal is transmitted in the form of a surface plasmon polariton (SSPP) in the waveguide filter part, the waveguide power division part and the transition part.

[0042] The input port feeding part 1 inputs, after passing through the input port transition part 2, to the waveguide filtering part 3; wherein the size of the rectangular waveguide and the SSPP block in the input port transition part 2 is gradually changed to realize impedance matching; the waveguide filtering part 3 has a filtering function, which is used for filtering processing of the input electromagnetic signal; wherein in the waveguide filtering part 3, the size and arrangement period of the SSPP block provide a high-frequency cutoff frequency, and the width of the rectangular waveguide determines a low-frequency cutoff frequency; the electromagnetic signal after filtering processing enters the first waveguide power division filtering part 4 and the second waveguide power division filtering part 5 for power division processing; wherein the first waveguide power division filtering part 4 and the second waveguide power division filtering part 5 have the same structure and are formed by the waveguide filtering part 3 to realize the equal-amplitude and in-phase power division function; wherein the filtering cutoff frequency formed by the first waveguide power division filtering part 4 and the second waveguide power division filtering part 5 is the same as the filtering cutoff frequency of the waveguide filtering part 3; the first route electromagnetic signal after filtering and power division passes through the first output port transition part 6 and is output by the first output port feeding part 8; the second route electromagnetic signal after filtering and power division passes through the second output port transition part 7 and is output by the second output port feeding part 9.

[0043] In the present application, the input port feeding part 1, the first output port feeding part 8 and the second output port feeding part 9 all adopt WR-34 standard rectangular waveguide; the input port transition part 2 is used to realize the transition from the input port feeding part 1 to the waveguide filtering part 3; wherein from the front end to the rear end of the input port transition part 2, the size of the rectangular waveguide in the input port transition part 2 gradually decreases, and the height of the SSPP block gradually increases to realize impedance matching; the waveguide filtering part 3 is a double-sided SSPP-rectangular waveguide structure, which is provided with SSPP blocks on the upper and lower sides of the rectangular waveguide in the waveguide filtering part 3, and realizes the band-pass filtering function when the electromagnetic wave passes through the waveguide filtering part 3; wherein the size and interval period of the SSPP block in the waveguide filtering part 3 provide a high-frequency cutoff frequency, and the width of the rectangular waveguide in the waveguide filtering part 3 determines a low-frequency cutoff frequency; the first waveguide power division filtering part 4 and the second waveguide power division filtering part 5 are single-sided SSPP-rectangular waveguide structures, the first waveguide power division filtering part 4 and the second waveguide power division filtering part 5 are formed by the upper and lower sides of the rear end of the waveguide filtering part 3, the cutoff frequency of the filtering passband formed by the first waveguide power division filtering part 4 and the second waveguide power division filtering part 5 is the same as the cutoff frequency of the waveguide filtering part 3, thereby realizing the equal-amplitude and in-phase power division function.

[0044] The millimeter wave waveguide filter power divider integrates the waveguide filter part realizing the filter function and the waveguide filter power divider part realizing the power division function in a passive device, realizes equal-amplitude and in-phase output of two output port feeding parts, has wide filter frequency, small output difference of two output port feeding parts, compact structure and is suitable for millimeter wave communication systems.

[0045] Embodiment

[0046] In the embodiment, a millimeter wave waveguide filter power divider made by a 3D printing process is taken as an example, wherein the overall size of the millimeter wave waveguide filter power divider is length x width x height = 40.88 mm x 30.54 mm x 11.86 mm.

[0047] As shown in the accompanying drawings, Figures 1-7 The millimeter wave waveguide filter power divider comprises an input port feeding part 1, an input port transition part 2, a waveguide filter part 3, a first waveguide filter power divider part 4, a second waveguide filter power divider part 5, a first output port transition part 6, a second output port transition part 7, a first output port feeding part 8 and a second output port feeding part 9. The front end of the input port transition part 2 is connected with the input port feeding part 1, the rear end of the input port transition part 2 is connected with the front end of the waveguide filter part 3, the upper side of the rear end of the waveguide filter part 3 is connected with the front end of the first waveguide filter power divider part 4, and the lower side of the rear end of the waveguide filter part 3 is connected with the front end of the second waveguide filter power divider part 5. The rear end of the first waveguide filter power divider part 4 is connected with the front end of the first output port filter part 6, the rear end of the first output port filter part 6 is connected with the first output port feeding part 8, the rear end of the second waveguide filter power divider part 5 is connected with the front end of the second output port filter part 7, and the rear end of the second output port filter part 7 is connected with the second output port feeding part 9.

[0048] In the embodiment, the input port feeding portion 1 is configured to input electromagnetic energy, the input port transition portion 2 is configured to transition between the input port feeding portion 1 and the waveguide filter portion 3, and the waveguide filter portion 3 is configured to implement a filtering function; the first waveguide power division filter portion 4 and the second waveguide power division filter portion 5 are configured to divide the power of the electromagnetic energy after filtering; the first output port transition portion 6 is configured to transition between the first waveguide power division filter portion 4 and the first output port feeding portion 8, and the second output port transition portion 7 is configured to transition between the second waveguide power division filter portion 5 and the second output port feeding portion 9; the first output port feeding portion 8 is configured to output a first electromagnetic signal after filtering and power division, and the second output port feeding portion 9 is configured to output a second electromagnetic signal after filtering and power division.

[0049] In the embodiment, the input port feeding portion 1 is a WR-34 standard rectangular waveguide.

[0050] In the embodiment, the input port transition portion 2 includes an input transition section rectangular waveguide portion 21 and input transition section double-sided SSPP units 22 arranged on the upper and lower sides of the input transition section rectangular waveguide portion 21; the input transition section rectangular waveguide portion 21 includes eight rectangular waveguides with different widths and heights, and the input transition section double-sided SSPP units 22 include eight groups of double-sided SSPP blocks with different heights, each group of double-sided SSPP blocks including two symmetrical SSPP blocks.

[0051] Specifically, the input transition section rectangular waveguide portion 21 includes an input transition section first rectangular waveguide section 211, an input transition section second rectangular waveguide section 212, an input transition section third rectangular waveguide section 213, an input transition section fourth rectangular waveguide section 214, an input transition section fifth rectangular waveguide section 215, an input transition section sixth rectangular waveguide section 216, an input transition section seventh rectangular waveguide section 217, and an input transition section eighth rectangular waveguide section 218 coaxially connected in sequence.

[0052] The width dimensions of the input transition section first rectangular waveguide section 211, the input transition section second rectangular waveguide section 212, the input transition section third rectangular waveguide section 213, the input transition section fourth rectangular waveguide section 214, the input transition section fifth rectangular waveguide section 215, the input transition section sixth rectangular waveguide section 216, the input transition section seventh rectangular waveguide section 217 and the input transition section eighth rectangular waveguide section 218 are 7.80 mm, 7.35 mm, 6.10 mm, 5.94 mm, 5.16 mm, 4.56 mm, 3.81 mm and 3.09 mm respectively, and the height dimensions are 4.34 mm, 4.69 mm, 4.8 mm, 5.06 mm, 5.25 mm, 5.57 mm, 5.62 mm and 5.73 mm respectively; and the interval period of adjacent two input transition section rectangular waveguide sections is 1.3 mm.

[0053] Specifically, the input transition section double-sided SSPP unit 22 includes an input transition section first double-sided SSPP block 221, an input transition section second double-sided SSPP block 222, an input transition section third double-sided SSPP block 223, an input transition section fourth double-sided SSPP block 224, an input transition section fifth double-sided SSPP block 225, an input transition section sixth double-sided SSPP block 226, an input transition section seventh double-sided SSPP block 227 and an input transition section eighth double-sided SSPP block 228.

[0054] The two SSPP blocks in the input transition section first double-sided SSPP block 221 are symmetrically arranged on the upper and lower sides of the input transition section first rectangular waveguide section 211; the two SSPP blocks in the input transition section second double-sided SSPP block 222 are symmetrically arranged on the upper and lower sides of the input transition section second rectangular waveguide section 212; the two SSPP blocks in the input transition section third double-sided SSPP block 223 are symmetrically arranged on the upper and lower sides of the input transition section third rectangular waveguide section 213; the two SSPP blocks in the input transition section fourth double-sided SSPP block 224 are symmetrically arranged on the upper and lower sides of the input transition section fourth rectangular waveguide section 214; the two SSPP blocks in the input transition section fifth double-sided SSPP block 225 are symmetrically arranged on the upper and lower sides of the input transition section fifth rectangular waveguide section 215; the two SSPP blocks in the input transition section sixth double-sided SSPP block 226 are symmetrically arranged on the upper and lower sides of the input transition section sixth rectangular waveguide section 216; the two SSPP blocks in the input transition section seventh double-sided SSPP block 227 are symmetrically arranged on the upper and lower sides of the input transition section seventh rectangular waveguide section 217; and the two SSPP blocks in the input transition section eighth double-sided SSPP block 228 are symmetrically arranged on the upper and lower sides of the input transition section eighth rectangular waveguide section 218.

[0055] The height dimensions of the input transition section first double-sided SSPP block 221, the input transition section second double-sided SSPP block 222, the input transition section third double-sided SSPP block 223, the input transition section fourth double-sided SSPP block 224, the input transition section fifth double-sided SSPP block 225, the input transition section sixth double-sided SSPP block 226, the input transition section seventh double-sided SSPP block 227, and the input transition section eighth double-sided SSPP block 228 are 0.25 mm, 0.55 mm, 1.02 mm, 1.14 mm, 1.39 mm, 1.62 mm, 1.93 mm, and 2.16 mm, respectively, and the width dimension is 1.2 mm; and the interval period between adjacent two double-sided SSPP blocks is 1.3 mm.

[0056] In the embodiment, the waveguide filter section 3 includes a filter section rectangular waveguide part 31 and filter section double-sided SSPP units 32 arranged on the upper and lower sides of the filter section rectangular waveguide part; the filter section rectangular waveguide part includes four identical filter section rectangular waveguide sections, each of which has a width dimension of 2.4 mm and a height dimension of 6 mm; the filter section double-sided SSPP units include four identical double-sided SSPP blocks; in the filter section double-sided SSPP units, the double-sided SSPP blocks have a height dimension of 2.4 mm, a width dimension of 1.2 mm, and an interval period of 1.3 mm.

[0057] In the embodiment, the first waveguide power division filter section 4 includes a first curved waveguide power division part 41 and a first straight waveguide power division part 42 connected in front and back; the front end of the first curved waveguide power division part 41 is connected to the upper side of the rear end of the waveguide filter section 3, the rear end of the first curved waveguide power division part 41 is connected to the front end of the first straight waveguide power division part 42, and the rear end of the first straight waveguide power division part 42 is connected to the front end of the first output port transition section 6.

[0058] Specifically, the first curved waveguide power division part 41 is connected in sequence by six curved single-sided SSPP-rectangular waveguide unit structures, each of which has a bending angle of 5°; the first straight waveguide power division part 42 is connected by two straight single-sided SSPP-rectangular waveguide unit structures; the single-sided SSPP-rectangular waveguide unit structure includes a rectangular waveguide section and an SSPP block arranged on the upper side of the rectangular waveguide section, and the rectangular waveguide section has a width dimension of 2.4 mm and a height dimension of 3 mm; the SSPP block has a height dimension of 2.4 mm, a width dimension of 1.2 mm, and an interval period of 1.3 mm.

[0059] In the embodiment, the structure of the second waveguide power division filtering part 5 is basically the same as that of the first waveguide power division filtering part 4, except that the single-sided SSPP-rectangular waveguide unit structure in the second waveguide power division filtering part 5 includes a rectangular waveguide segment and an SSPP block arranged at the lower side of the rectangular waveguide segment, and the rest of the structure is basically the same and will not be repeated here.

[0060] It should be noted that the first waveguide power division filtering part 4 is arranged upwardly inclined, and the second waveguide power division filtering part 5 is arranged downwardly inclined, so as to reduce the mutual influence between them and achieve better power division effect; preferably, the included angle between the first waveguide power division filtering part 4 and the second waveguide power division filtering part 5 is set to 6°.

[0061] In the embodiment, the first output port transition part 6 includes a first output transition segment rectangular waveguide part 61 and a first output transition segment single-sided SSPP block 62 arranged at the upper side of the first output transition segment rectangular waveguide part 61; wherein the first output transition segment rectangular waveguide part 61 includes eight rectangular waveguides with different widths and heights, and the first output transition segment single-sided SSPP block 62 includes eight single-sided SSPP blocks with different heights.

[0062] Specifically, the first output transition segment rectangular waveguide part 61 includes a first output transition segment first rectangular waveguide segment, a first output transition segment second rectangular waveguide segment, a first output transition segment third rectangular waveguide segment, a first output transition segment fourth rectangular waveguide segment, a first output transition segment fifth rectangular waveguide segment, a first output transition segment sixth rectangular waveguide segment, a first output transition segment seventh rectangular waveguide segment and a first output transition segment eighth rectangular waveguide segment coaxially connected in sequence.

[0063] The width dimensions of the first output transition segment first rectangular waveguide segment, the first output transition segment second rectangular waveguide segment, the first output transition segment third rectangular waveguide segment, the first output transition segment fourth rectangular waveguide segment, the first output transition segment fifth rectangular waveguide segment, the first output transition segment sixth rectangular waveguide segment, the first output transition segment seventh rectangular waveguide segment and the first output transition segment eighth rectangular waveguide segment are 3.02 mm, 3.86 mm, 5.01 mm, 5.46 mm, 6.93 mm, 6.97 mm, 7.735 mm and 7.8 mm in sequence, and the height dimensions are 3.15 mm, 3.21 mm, 3.44 mm, 3.71 mm, 3.44 mm, 3.88 mm, 3.86 mm and 4.2 mm in sequence; and the interval period of adjacent two rectangular waveguide segments is 1.3 mm.

[0064] Specifically, the first output transition section single-side SSPP unit 62 includes a first output transition section first SSPP block, a first output transition section second SSPP block, a first output transition section third SSPP block, a first output transition section fourth SSPP block, a first output transition section fifth SSPP block, a first output transition section sixth SSPP block, a first output transition section seventh SSPP block, and a first output transition section eighth SSPP block.

[0065] The first output transition section first SSPP block is arranged on the upper side of the first output transition section first rectangular waveguide section, the first output transition section second SSPP block is arranged on the upper side of the first output transition section second rectangular waveguide section, the first output transition section third SSPP block is arranged on the upper side of the first output transition section third rectangular waveguide section, the first output transition section fourth SSPP block is arranged on the upper side of the first output transition section fourth rectangular waveguide section, the first output transition section fifth SSPP block is arranged on the upper side of the first output transition section fifth rectangular waveguide section, the first output transition section sixth SSPP block is arranged on the upper side of the first output transition section sixth rectangular waveguide section, the first output transition section seventh SSPP block is arranged on the upper side of the first output transition section seventh rectangular waveguide section, and the first output transition section eighth SSPP block is arranged on the upper side of the first output transition section eighth rectangular waveguide section.

[0066] The height dimensions of the first output transition section first SSPP block, the first output transition section second SSPP block, the first output transition section third SSPP block, the first output transition section fourth SSPP block, the first output transition section fifth SSPP block, the first output transition section sixth SSPP block, the first output transition section seventh SSPP block, and the first output transition section eighth SSPP block are 2.31 mm, 1.90 mm, 1.87 mm, 1.38 mm, 1.16 mm, 0.77 mm, 0.55 mm, and 0.20 mm, respectively, and the width dimension of each of the SSPP blocks is 1.2 mm; and the interval period between adjacent two SSPP blocks is 1.3 mm.

[0067] The structure of the second output port transition section 7 is basically the same as that of the first output port transition section 6, except that the single-side SSPP unit in the second output port transition section 7 is arranged on the lower side of the rectangular waveguide section.

[0068] The specific structure of the second output port transition section 7 is as follows:

[0069] The second output port transition part 7 comprises a second output transition section rectangular waveguide part 71 and a second output transition section single-sided SSPP unit 72 arranged on the upper side of the second output transition section rectangular waveguide part 71; wherein the second output transition section rectangular waveguide part 71 comprises eight rectangular waveguides with different widths and heights, and the second output transition section single-sided SSPP block 62 comprises eight single-sided SSPP blocks with different heights.

[0070] Specifically, the second output transition section rectangular waveguide part 71 comprises a second output transition section first rectangular waveguide section 711, a second output transition section second rectangular waveguide section 712, a second output transition section third rectangular waveguide section 713, a second output transition section fourth rectangular waveguide section 714, a second output transition section fifth rectangular waveguide section 715, a second output transition section sixth rectangular waveguide section 716, a second output transition section seventh rectangular waveguide section 717 and a second output transition section eighth rectangular waveguide section 718 coaxially connected in sequence.

[0071] The width dimensions of the second output transition section first rectangular waveguide section 711, the second output transition section second rectangular waveguide section 712, the second output transition section third rectangular waveguide section 713, the second output transition section fourth rectangular waveguide section 714, the second output transition section fifth rectangular waveguide section 715, the second output transition section sixth rectangular waveguide section 716, the second output transition section seventh rectangular waveguide section 717 and the second output transition section eighth rectangular waveguide section 718 are 3.02 mm, 3.86 mm, 5.01 mm, 5.46 mm, 6.93 mm, 6.97 mm, 7.735 mm and 7.8 mm in sequence, and the height dimensions are 3.15 mm, 3.21 mm, 3.44 mm, 3.71 mm, 3.44 mm, 3.88 mm, 3.86 mm and 4.2 mm in sequence; and the interval period of adjacent two rectangular waveguide sections is 1.3 mm.

[0072] Specifically, the second output transition section single-sided SSPP unit 72 comprises a second output transition section first SSPP block 721, a second output transition section second SSPP block 722, a second output transition section third SSPP block 723, a second output transition section fourth SSPP block 724, a second output transition section fifth SSPP block 725, a second output transition section sixth SSPP block 726, a second output transition section seventh SSPP block 727 and a second output transition section eighth SSPP block 728.

[0073] The second output transition section first SSPP block 721 is arranged on the upper side of the second output transition section first rectangular waveguide section 711, the second output transition section second SSPP block 722 is arranged on the upper side of the second output transition section second rectangular waveguide section 712, the second output transition section third SSPP block 723 is arranged on the upper side of the second output transition section third rectangular waveguide section 713, the second output transition section fourth SSPP block 724 is arranged on the upper side of the second output transition section fourth rectangular waveguide section 714, the second output transition section fifth SSPP block 725 is arranged on the upper side of the second output transition section fifth rectangular waveguide section 715, the second output transition section sixth SSPP block 726 is arranged on the upper side of the second output transition section sixth rectangular waveguide section 716, the second output transition section seventh SSPP block 727 is arranged on the upper side of the second output transition section seventh rectangular waveguide section 717, and the second output transition section eighth SSPP block 728 is arranged on the upper side of the second output transition section eighth rectangular waveguide section 718.

[0074] The height dimensions of the second output transition section first SSPP block 721, the second output transition section second SSPP block 722, the second output transition section third SSPP block 723, the second output transition section fourth SSPP block 724, the second output transition section fifth SSPP block 725, the second output transition section sixth SSPP block 726, the second output transition section seventh SSPP block 727 and the second output transition section eighth SSPP block 728 are 2.31 mm, 1.90 mm, 1.87 mm, 1.38 mm, 1.16 mm, 0.77 mm, 0.55 mm and 0.20 mm respectively, and the width dimension of each of them is 1.2 mm; and the interval period between two adjacent SSPP blocks is 1.3 mm.

[0075] In the embodiment, the first output port feeding portion 8 and the second output port feeding portion 9 have the same structure, and each adopts a WR-34 standard rectangular waveguide.

[0076] As shown in FIG. 2, the S parameter amplitude curve of the millimeter wave waveguide filter in the embodiment is given in the accompanying drawings. Figure 8 As shown in FIG. 2, the S parameter amplitude curve of the millimeter wave waveguide filter in the embodiment is given in the accompanying drawings. Figure 8 Figure 8 ​As shown in the accompanying

[0077] As shown in the accompanying Figure 9 As shown in the accompanying Figure 9 The S parameter phase curve of the millimeter wave waveguide filter power divider in the embodiment is shown in the accompanying Figure 9 As shown in the accompanying

[0078] The millimeter wave waveguide filter power divider provided by the application, the input port feeding part, the first output port feeding part and the second output port feeding part all adopt WR-34 standard rectangular waveguides, the input port transition part, the first output port transition part and the second output port transition part are all used for realizing the transition from the WR-34 standard rectangular waveguide to the waveguide filter part; in order to realize impedance matching, the size of the rectangular waveguide of the transition part and the size of the SSPP block are both gradually changed; specifically, the waveguide size of the transition part is reduced and the height of the SSPP block is increased to realize impedance matching; the waveguide filter part is used for realizing the filtering function and is realized by adopting the combination structure of double-sided SSPP-rectangular waveguide; wherein the size of the SSPP block in the waveguide filter part is large and the interval period provides the high frequency cutoff frequency, and the width size of the rectangular waveguide in the waveguide filter part determines the low frequency cutoff frequency; the first waveguide power division filter part and the second waveguide power division filter part are both used for the power division function, the power division function is realized by dividing the double-sided SSPP-rectangular waveguide into two single-sided SSPP-rectangular waveguide structures, and the cutoff frequency of the filter passband of the single-sided SSPP-rectangular waveguide structure is the same as that of the double-sided SSPP-rectangular waveguide.

[0079] In the double-sided SSPP-rectangular waveguide structure of the waveguide filter part in the application, the SSPP blocks are arranged on the upper and lower sides of the rectangular waveguide, and when the electromagnetic wave passes through the double-sided SSPP-rectangular waveguide part, the band-pass filtering function is realized; the single-sided SSPP-rectangular waveguide structure of the first waveguide power division filter part and the second waveguide power division filter part is formed by separating the double-sided SSPP-rectangular waveguide structure, and the equal-amplitude and in-phase power division function is realized.

[0080] In the application, the filtering function and the power division function are integrated in a passive device, two output ports output in equal amplitude and in phase, the filtering function and the equal amplitude and in phase power division function can be realized simultaneously, and the application is suitable for a millimeter wave communication system; the application has the characteristics of wide filtering bandwidth, good frequency selectivity, small output difference of two output ports, compact structure, low cost, and is suitable for a millimeter wave communication system.

[0081] The above embodiment is only one of the implementation manners of the technical scheme of the application, and the scope of the application claimed is not limited to the embodiment, but also includes any changes, substitutions and other implementation manners easily thought of by those skilled in the art within the technical scope disclosed by the application.

Claims

1. A millimeter-wave waveguide filter power divider, characterized in that, It includes an input port power supply section (1), a waveguide filter section (3), a first waveguide power divider filter section (4), a second waveguide power divider filter section (5), a first output port power supply section (8), and a second output port power supply section (9). The input port power supply section (1) is located at the front end of the waveguide filter section (3), the front end of the first waveguide power divider filter section (4) is connected to the upper rear end of the waveguide filter section (3), the first output port power supply section (8) is located at the rear end of the first waveguide power divider filter section (4); the front end of the second waveguide power divider filter section (5) is connected to the lower rear end of the waveguide filter section (3), and the second output port power supply section (9) is located at the rear end of the second waveguide power divider filter section (5). The waveguide filtering section (3) includes a first waveguide section, and SSPP blocks are symmetrically arranged on the upper and lower sides of the first waveguide section; the first waveguide power divider filtering section (4) includes a second waveguide section, and SSPP blocks are arranged on the upper side of the second waveguide section; the second waveguide power divider filtering section (5) includes a third waveguide section, and SSPP blocks are arranged on the lower side of the third waveguide section.

2. The millimeter-wave waveguide filter power divider according to claim 1, characterized in that, The input port power supply section (1), the first output port power supply section (8), and the second output port power supply section (9) all adopt the WR-34 standard rectangular waveguide.

3. The millimeter-wave waveguide filter power divider according to claim 1, characterized in that, It also includes an input port transition section (2), which is disposed between the input port feed section (1) and the waveguide filter section (3); wherein the input port transition section (2) is used for the transition from the input port feed section (1) to the waveguide filter section (3).

4. A millimeter-wave waveguide filter power divider according to claim 3, characterized in that, The input port transition section (2) includes a fourth waveguide section, and SSPP blocks are symmetrically arranged on the upper and lower sides of the fourth waveguide section; wherein, from the front end to the rear end of the input port transition section (2), the width dimension of the fourth waveguide section decreases sequentially, and the height dimension of the SSPP blocks in the fourth waveguide section increases sequentially.

5. A millimeter-wave waveguide filter power divider according to claim 1, characterized in that, The width of the first waveguide section matches the low-frequency cutoff frequency of the waveguide filter section (3); the external dimensions and arrangement period of the SSPP block in the first waveguide section match the high-frequency cutoff frequency of the waveguide filter section (3).

6. A millimeter-wave waveguide filter power divider according to claim 1, characterized in that, The cutoff frequencies of the first waveguide power divider filter section (4) and the second waveguide power divider filter section (5) are the same as the cutoff frequency of the waveguide filter section (3).

7. A millimeter-wave waveguide filter power divider according to claim 1, characterized in that, It also includes a first output port transition section (6), which is disposed between the first waveguide power divider filter section (4) and the first output port feed section (8); wherein, the first output port transition section (6) is used for the first waveguide power divider filter section (4) to transition to the first output port feed section (8).

8. A millimeter-wave waveguide filter power divider according to claim 7, characterized in that, The first output port transition section (6) includes a fifth waveguide section, and an SSPP block is provided on the upper side of the fifth waveguide section; wherein, from the front end to the rear end of the first output port transition section (6), the width dimension of the fifth waveguide section increases sequentially, and the height dimension of the SSPP block in the fifth waveguide section decreases sequentially.

9. A millimeter-wave waveguide filter power divider according to claim 1, characterized in that, It also includes a second output port transition section (7); the second output port transition section (7) is disposed between the second waveguide power divider filter section (5) and the second output port feed section (9); wherein, the second output port transition section (7) is used for the transition from the second waveguide power divider filter section (5) to the second output port feed section (9).

10. A millimeter-wave waveguide filter power divider according to claim 9, characterized in that, The second output port transition section (7) includes a sixth waveguide section, and an SSPP block is provided on the lower side of the sixth waveguide section; wherein, from the front end to the rear end of the second output port transition section (7), the width dimension of the sixth waveguide section increases sequentially, and the height dimension of the SSPP block in the sixth waveguide section decreases sequentially.

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