Ultra-wideband h-plane waveguide t-junction power divider

Abstract

Disclosed is an ultra-wideband H-plane waveguide T-junction power divider, comprising an input rectangular waveguide, a matched rectangular waveguide, a matching post, a rectangular septum, two output rectangular waveguides, and two tuning cavities; a center line of the matching post coincides with a center line where a vertical cross section and a longitudinal cross section of the output rectangular waveguides intersect, and a bottom surface of the matching post is flush with a bottom surface of the output rectangular waveguides; the rectangular septum is located on a side opposite the input rectangular waveguide and is inserted in a direction from the top toward the input rectangular waveguide; the two tuning cavities are located on the side opposite the input rectangular waveguide and are respectively arranged on either side of the rectangular septum. The described structure allows for a very simple and compact power divider structure that is easy to fabricate. Moreover, in a frequency band of 4.44 GHz-8.71 GHz, an impedance bandwidth of an input port of the power divider, defined by S11≤ -20 dB, is greater than 64.9%, and two signals output by the power divider exhibit good amplitude and phase consistency within the aforementioned frequency band, thereby resulting in good potential for wide application.

Description

Ultra-wideband H-plane waveguide T-junction power divider TECHNICAL FIELD

[0001] The present application relates to the field of power dividers, in particular to an ultra-wideband H-plane waveguide T-junction power divider. BACKGROUND

[0002] A power divider is a device that divides the energy of an input signal into two or more equal or unequal energy output channels, or combines multiple signal energy into one output channel, which is also called a combiner. Power dividers can be divided into microstrip line structure, coaxial structure, dielectric integrated waveguide and metal waveguide structure, etc. Among them, the H-plane waveguide T-junction power divider, also known as rectangular waveguide H-T branch, is a commonly used waveguide power / combiner in microwave engineering. Rectangular waveguide H-T branch has the characteristics of simple structure, high power capacity and low insertion loss, and is widely used in power distribution / composition and array antenna feed network.

[0003] With the advancement of social informatization, the emerging businesses represented by network video, cloud computing, big data and Internet of Things have greatly increased the demand for transmission capacity and rate of microwave communication systems, thereby putting forward higher and higher bandwidth requirements for microwave feed systems. The traditional rectangular waveguide H-T branch has narrow impedance bandwidth, that is, even if the bandwidth is expanded by loading metal adjusting pins, conical bodies and metal spacers, the impedance bandwidth of S11≤-20dB is usually only about 20%. The existing rectangular waveguide H-T branch broadband technology mainly includes Y-type junction and multi-stage stepped impedance matching. The former has limited bandwidth improvement, and the impedance bandwidth of S11≤-20dB is usually only about 30%. The latter introduces multi-stage impedance transformation, resulting in complex processing and large size, which often cannot meet the miniaturization requirement and has certain application limitations. The rectangular planar matching boss of the loaded ridge waveguide can also be used to expand the bandwidth, and the effect is significant. The impedance bandwidth of S11≤-20dB can reach 54%, but this scheme still cannot meet the requirement of wider bandwidth, such as more than 64%.

[0004] Therefore, there is an urgent need for an H-plane waveguide T-junction power divider with simple and compact structure, easy processing and impedance bandwidth of S11≤-20dB higher than 64% to solve the above problems. SOLUTION

[0005] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application proposes an ultra-wideband H-plane waveguide T-junction power divider.

[0006] One embodiment of the present invention provides a technical solution to solve its technical problem: an ultra-wideband H-plane waveguide T-junction power divider, comprising an input rectangular waveguide, a matching rectangular waveguide, a matching cylinder, a rectangular partition, two output rectangular waveguides, and two adjustment cavities;

[0007] The two output rectangular waveguides are through and orthogonal to the input rectangular waveguide to form an H-plane waveguide T-junction;

[0008] The matching rectangular waveguide connects the input rectangular waveguide and the output rectangular waveguide;

[0009] The centerline of the matching cylinder coincides with the centerline of the intersection of the vertical and longitudinal cross-sections of the output rectangular wave, and the bottom surface is in contact with the bottom surface of the output rectangular waveguide.

[0010] The rectangular partition is located on the opposite side of the input rectangular waveguide and is embedded from the top toward the input rectangular waveguide. The rectangular partition is geometrically symmetrical about the vertical cross-section of the two output rectangular waveguides.

[0011] The two adjustment cavities are located on opposite sides of the input rectangular waveguide and are arranged on both sides of the rectangular partition. The adjustment cavities are geometrically symmetrical about the vertical cross-section of the two output rectangular waveguides.

[0012] The TE10 mode input to the rectangular waveguide is split into two signals of equal amplitude and in phase, and output from two separate rectangular waveguides.

[0013] As one of the preferred embodiments of the present invention, the width of the matching rectangular waveguide is 85%-95% of the length of the wide side of the output rectangular waveguide;

[0014] Height of the matched rectangular waveguide: 85%-95% of the narrow side length of the output rectangular waveguide;

[0015] The length of the matching rectangular waveguide is 1 / 8 to 1 / 4 of the waveguide wavelength.

[0016] Matching cylinder diameter range: 30%-70% of the wide side length of the output rectangular waveguide;

[0017] Matching cylinder height range: 20%-40% of the narrow side length of the output rectangular waveguide.

[0018] As one of the preferred embodiments of the present invention, the matching cylinder is shifted to the left or right along the symmetry line of the H-plane waveguide T-junction by a distance less than 5% of the length of the wide side of the output rectangular waveguide.

[0019] As one of the preferred embodiments of the present invention, the lower limit of the range of values ​​for the height of the rectangular partition is: the narrow side length of the output rectangular waveguide minus the height of the matching cylinder;

[0020] Upper limit of the rectangular partition height range: the narrow side length of the output rectangular waveguide;

[0021] Embedding depth of rectangular septum: 30%-70% of the width of the output rectangular waveguide;

[0022] Thickness of the rectangular partition: 6%-22% of the width of the output rectangular waveguide.

[0023] In one preferred embodiment of the present invention, the height of the adjustment cavity is equal to the length of the narrow side of the output rectangular waveguide;

[0024] The length of the adjustment cavity can be ranged from 35% to 65% of the width of the output rectangular waveguide.

[0025] The width of the adjustable cavity can be 5%-25% of the length of the wide side of the output rectangular waveguide. Beneficial effects

[0026] The beneficial effects of this invention are as follows: An ultra-wideband H-plane waveguide T-junction power divider includes an input rectangular waveguide, a matching rectangular waveguide, a matching cylinder, a rectangular partition, two output rectangular waveguides, and two adjustment cavities. The centerline of the matching cylinder coincides with the centerline of the intersection of the vertical and longitudinal cross-sections of the output rectangular waveguides, and its bottom surface is in contact with the bottom surface of the output rectangular waveguides. The rectangular partition is located on the opposite side of the input rectangular waveguide and is embedded from the top towards the input rectangular waveguide. The two adjustment cavities are located on the opposite side of the input rectangular waveguide and are arranged on both sides of the rectangular partition. Through the above structure, the power divider can be made very simple and compact, easy to manufacture, and in the 4.44GHz-8.71GHz frequency band, the impedance bandwidth of the input port S11≤-20dB is higher than 64.9%, and the amplitude and phase consistency of the two output signals are good in the above frequency band, which has good promotional value. Attached Figure Description

[0027] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0028] Figure 1 is a three-dimensional diagram of a simulation model of a first embodiment of an ultra-wideband H-plane waveguide T-junction power divider;

[0029] Figure 2 is a top view of a simulation model of a first embodiment of an ultra-wideband H-plane waveguide T-junction power divider;

[0030] Figure 3 is a three-dimensional simulation model of a second embodiment of an ultra-wideband H-plane waveguide T-junction power divider;

[0031] Figure 4 is a top view of a simulation model of a second embodiment of an ultra-wideband H-plane waveguide T-junction power divider;

[0032] Figure 5 is a structural assembly diagram of a first embodiment of an ultra-wideband H-plane waveguide T-junction power divider;

[0033] Figure 6 is a structural assembly diagram of a second embodiment of an ultra-wideband H-plane waveguide T-junction power divider;

[0034] Figure 7 shows the instantaneous electric field distribution of a first embodiment of an ultra-wideband H-plane waveguide T-junction power divider;

[0035] Figure 8 is a schematic diagram of the S-parameter curves of a first embodiment of an ultrawideband H-plane waveguide T-junction power divider;

[0036] Figure 9 is a schematic diagram of the phase curves of the two branches of a first embodiment of an ultra-wideband H-plane waveguide T-junction power divider. The best embodiment of the present invention

[0037] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0038] In the description of this invention, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0039] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0040] In this invention, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integrally formed connection; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0041] Referring to Figures 1 to 9, an ultrawideband H-plane waveguide T-junction power divider includes an input rectangular waveguide 10, a matching rectangular waveguide 20, a matching cylinder 30, a rectangular partition 40, two output rectangular waveguides 50, and two adjustment cavities 60.

[0042] The two output rectangular waveguides 50 are through and orthogonal to the input rectangular waveguide 10 to form an H-plane waveguide T-junction;

[0043] Matching rectangular waveguide 20 connects input rectangular waveguide 10 and output rectangular waveguide 50;

[0044] The centerline of the matching cylinder 30 coincides with the centerline of the intersection of the vertical and longitudinal cross-sections of the output rectangular wave, and the bottom surface is in contact with the bottom surface of the output rectangular waveguide 50.

[0045] The rectangular partition 40 is located on the opposite side of the input rectangular waveguide 10 and is embedded from the top toward the input rectangular waveguide 10. The rectangular partition 40 is geometrically symmetrical about the vertical cross-section of the two output rectangular waveguides 50.

[0046] The two adjustment cavities 60 are located on opposite sides of the input rectangular waveguide 10 and are arranged on both sides of the rectangular partition 40. The adjustment cavities 60 are geometrically symmetrical about the vertical cross-section of the two output rectangular waveguides 50.

[0047] The TE10 mode input to the input rectangular waveguide 10 is split into two signals of equal amplitude and in phase, and output from the two output rectangular waveguides 50 respectively.

[0048] 1) Referring to Figures 1-6, in this invention, the two output rectangular waveguides 50 are directly connected, and the longitudinal cross-section where the center lines of the upper and lower wide sides of the output rectangular waveguide 50 are located is orthogonal to the longitudinal cross-section where the center lines of the upper and lower wide sides of the input rectangular waveguide 10 are located; the transverse cross-section where the center lines of the left and right narrow sides of the output rectangular waveguide 50 are located is on the same plane as the transverse cross-section where the left and right narrow sides of the input rectangular waveguide 10 are located; the vertical cross-section where the center lines of the front and rear long sides of the output rectangular waveguide 50 are located is on the same plane as the longitudinal cross-section of the input rectangular waveguide 10, that is, the two output rectangular waveguides 50 are geometrically symmetrical about this plane.

[0049] 2) The matching rectangular waveguide 20 connects the input rectangular waveguide 10 and the output rectangular waveguide 50, and the longitudinal and transverse cross sections of the matching rectangular waveguide 20 coincide with those of the input rectangular waveguide 10. In some embodiments, to obtain a wider impedance bandwidth, preferred methods include: ① adjusting the width of the matching rectangular waveguide 20, preferably 85%-95% of the length of the wide side of the output rectangular waveguide 50; ② adjusting the height of the matching rectangular waveguide 20, preferably 85%-95% of the length of the narrow side of the output rectangular waveguide 50; ③ adjusting the length of the matching rectangular waveguide 20, preferably 1 / 8-1 / 4 of the waveguide wavelength.

[0050] 3) The centerline of the matching cylinder 30 coincides with the centerline of the intersection of the vertical and longitudinal cross-sections of the output rectangular wave, and the bottom surface is in contact with the bottom surface of the output rectangular waveguide 50. In some embodiments, in order to obtain a wider impedance bandwidth, preferred means include: ① adjusting the diameter of the matching cylinder 30, which is preferably 30%-70% of the width of the output rectangular waveguide 50; ② adjusting the height of the matching cylinder 30, which is preferably 20%-40% of the width of the output rectangular waveguide 50; ③ adjusting the position of the matching cylinder 30, specifically by shifting it to the left or right along the symmetry line of the H-plane waveguide T-junction by a distance less than 5% of the width of the output rectangular waveguide 50.

[0051] 4) The rectangular partition 40 is located on the opposite side of the input rectangular waveguide 10 and is embedded from the top toward the input rectangular waveguide 10. The rectangular partition 40 is geometrically symmetrical about the vertical cross-section of the two output rectangular waveguides 50. In some embodiments, to obtain a wider impedance bandwidth, preferred methods include: ① Adjusting the height of the rectangular partition 40, which has upper and lower limits. The lower limit corresponds to the first embodiment in Figures 1-2, and the upper limit corresponds to the second embodiment in Figures 3-4. As shown in Figures 1-2, the lower limit of the height range is: the narrow side length of the output rectangular waveguide 50 minus the height of the matching cylinder 30. As shown in Figures 3-4, the upper limit of the height range is: the narrow side length of the output rectangular waveguide 50. Considering actual processing, it is preferred to take the upper or lower limit; ② Adjusting the embedding depth of the rectangular partition 40, which is preferably 30%-70% of the wide side length of the output rectangular waveguide 50; ③ Adjusting the thickness of the rectangular partition 40, which is preferably 6%-22% of the wide side length of the output rectangular waveguide 50.

[0052] 5) The two adjustment cavities 60 are located on opposite sides of the input rectangular waveguide 10 and are arranged on both sides of the rectangular partition 40. The adjustment cavities 60 are geometrically symmetrical about the vertical cross-section of the two output rectangular waveguides 50. Referring to Figures 2 and 4, from a top view, it is equivalent to loading two protrusions on the top of the T-junction. In some embodiments, in order to obtain a wider impedance bandwidth, the preferred means are: ① adjusting the height of the adjustment cavity 60, which is preferably equal to the narrow side length of the output rectangular waveguide 50; ② adjusting the length of the adjustment cavity 60, which is preferably in the range of 35%-65% of the wide side length of the output rectangular waveguide 50; ③ adjusting the width of the protrusion of the adjustment cavity 60, which is preferably in the range of 5%-25% of the wide side length of the output rectangular waveguide 50.

[0053] 6) Through the above comprehensive methods and combined with the optimization algorithm of the three-dimensional electromagnetic simulation software, good input return loss and good amplitude-phase consistency of the two output branches can be obtained within a wide impedance bandwidth. Taking the first embodiment provided by the present invention as an example, referring to Figures 8-9, the optimized impedance bandwidth simulation result is that the impedance bandwidth of the input port S11≤-20dB is higher than 64.9% (4.44GHz-8.71GHz), and the amplitude and phase consistency of the two output signals are good within the above frequency band. The second embodiment provided by the present invention can also achieve similar results. To avoid repetition, only the results of the first embodiment are given. In addition, referring to Figures 5-6, the structural assembly diagrams of the first and second embodiments in actual engineering are shown, which are composed of the upper shell 80 and the lower shell 90. As can be seen from the figures, the present invention has the advantages of simple structure and easy processing, and has good engineering value.

[0054] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications and substitutions are included within the scope defined by the claims of this application.

Claims

An ultrawideband H-plane waveguide T-junction power divider, characterized in that: It includes an input rectangular waveguide (10), a matching rectangular waveguide (20), a matching cylinder (30), a rectangular septum (40), two output rectangular waveguides (50), and two tuning cavities (60); The two output rectangular waveguides (50) are through and orthogonal to the input rectangular waveguide (10) to form an H-plane waveguide T-junction; The matching rectangular waveguide (20) connects the input rectangular waveguide (10) and the output rectangular waveguide (50). The centerline of the matching cylinder (30) coincides with the centerline of the vertical and longitudinal cross sections of the output rectangular wave, and the bottom surface is in contact with the bottom surface of the output rectangular waveguide (50). The rectangular partition (40) is located on the opposite side of the input rectangular waveguide (10) and is embedded from the top toward the input rectangular waveguide (10). The rectangular partition (40) is geometrically symmetrical about the vertical cross-section of the two output rectangular waveguides (50). The two adjustment cavities (60) are located on opposite sides of the input rectangular waveguide (10) and are arranged on both sides of the rectangular partition (40). The adjustment cavities (60) are geometrically symmetrical about the vertical cross-section of the two output rectangular waveguides (50). The TE10 mode input to the input rectangular waveguide (10) is split into two signals of equal amplitude and in phase and output from the two output rectangular waveguides (50) respectively. The ultrawideband H-plane waveguide T-junction power divider according to claim 1 is characterized in that: The width of the matching rectangular waveguide (20) is 85%-95% of the width of the output rectangular waveguide (50). The height of the matching rectangular waveguide (20) is 85%-95% of the narrow side length of the output rectangular waveguide (50); The length of the matching rectangular waveguide (20) is 1 / 8 to 1 / 4 of the waveguide wavelength. The ultrawideband H-plane waveguide T-junction power divider according to claim 1 is characterized in that: The diameter range of the matching cylinder (30) is 30%-70% of the width of the output rectangular waveguide (50); The height range of the matching cylinder (30) is 20%-40% of the narrow side length of the output rectangular waveguide (50). The ultrawideband H-plane waveguide T-junction power divider according to claim 1 is characterized in that: The matching cylinder (30) is shifted to the left or right along the symmetry line of the H-plane waveguide T-junction by a distance less than 5% of the width of the output rectangular waveguide (50). The ultrawideband H-plane waveguide T-junction power divider according to claim 1 is characterized in that: The lower limit of the height range of the rectangular partition (40) is: the narrow side length of the output rectangular waveguide (50) minus the height of the matching cylinder (30); The upper limit of the height range of the rectangular partition (40) is: the narrow side length of the output rectangular waveguide (50); The embedding depth of the rectangular partition (40) is 30%-70% of the width of the output rectangular waveguide (50); The thickness of the rectangular partition (40) is 6%-22% of the width of the output rectangular waveguide (50). [Revised according to Rule 26, 03.12.2024] A super-wideband H-plane waveguide T-junction power divider according to claim 1, characterized in that: The height of the adjustment cavity (60) is equal to the length of the narrow side of the output rectangular waveguide (50); The length of the adjustment cavity (60) is in the range of 35%-65% of the width of the output rectangular waveguide (50); The width of the adjustment cavity (60) ranges from 5% to 25% of the width of the output rectangular waveguide (50).

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