CN211556091U - Full-wave-band magic T based on double-sided stepped rectangular waveguide - Google Patents
Full-wave-band magic T based on double-sided stepped rectangular waveguide Download PDFInfo
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- CN211556091U CN211556091U CN202020427487.2U CN202020427487U CN211556091U CN 211556091 U CN211556091 U CN 211556091U CN 202020427487 U CN202020427487 U CN 202020427487U CN 211556091 U CN211556091 U CN 211556091U
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Abstract
The utility model provides a full wave band magic T based on two-sided ladder rectangular waveguide forms by E-T and H-T joint, including four rectangular waveguide, be respectively by first waveguide pipe, second waveguide pipe and third waveguide pipe constitute H-T waveguide pipe and E face branch festival waveguide pipe jointly, standard waveguide port of every rectangular waveguide configuration, H-T waveguide pipe and E face branch festival waveguide pipe junction are equipped with the matching frustum and match the cylinder, first waveguide pipe, second waveguide pipe and third waveguide pipe and E face branch festival waveguide pipe all do the same and subtract high processing. The height and the width of the waveguide magic T are reduced, so that the working bandwidth of the magic T is effectively widened, the existing 80% waveguide bandwidth is expanded into a full-wave band, and the waveguide magic T has the advantages of large working bandwidth, excellent performance and good amplitude phase consistency. And the matching structure is simple, the processing and the manufacturing are easy, and the device has the characteristics of high production efficiency and low production cost.
Description
The technical field is as follows:
the utility model belongs to the technical field of waveguide device technique among wireless transmission systems such as radar, microwave, communication and specifically relates to a full wave band magic T based on two-sided ladder rectangular waveguide is related to.
Background art:
the magic T is formed by combining an E-T branch and an H-T branch and adding matching in a joint to eliminate reflection of each path, can be used as a power divider, a sum-difference device, a phase shifter, a tuner, a waveguide switch, a high-power circulator and other devices, and is an important passive device in a microwave millimeter wave system. Although the conventional rectangular waveguide magic T has the advantages of simple structure, high power capacity, good port characteristics and the like, tuning is difficult, and the insertion loss, standing-wave ratio and bandwidth performance of each port are also greatly limited, so that many researchers still strive to improve the full-band performance of the waveguide magic T by improving the waveguide structure and matching design.
In the text of the design of a novel broadband waveguide magic T of the Mongolian Cao Weiping, the publication of the university of Guilin electronic technology, published by 2013 for 12 months. According to the matching structure of the traditional magic T, a multi-step metal cone is placed at the offset center position of the inner cavity of the magic T, so that the purposes of impedance matching and bandwidth improvement are achieved; in Dingjie, Lin Weitao design of broadband ridge waveguide magic T, published as modern Radar, published as 2019, month 1. The upper ridge of the H-face of the magic T is connected to the double ridge of the E-face by two metal rods and a metal matching block is added at the interface of the ET and HT joints to improve the index. However, compared with the rectangular waveguide magic T structure, the design and manufacturing process is complex, the frequency response with the flat full frequency band is not realized, and the breakthrough on the design of the rectangular waveguide magic T is not realized. In addition, the existing commercial products such as series magic T of Millitech, Quinstar, etc. can only cover 80% of frequency bandwidth within the specified band bandwidth range, and the performance is seriously deteriorated at the edge of each band bandwidth.
Therefore, the rectangular waveguide magic T capable of realizing full-band frequency response is not reported in the existing products and commercial documents.
The invention content is as follows:
the utility model discloses to the work bandwidth that current magic T exists is limited in engineering application, whole wave band frequency band edge performance is poor, the preparation technology is complicated etc. not enough, provide a full wave band magic T based on two-sided ladder rectangular waveguide.
The utility model discloses a concrete technical scheme as follows:
a full-wave-band magic T based on double-sided stepped rectangular waveguides is formed by connecting E-T and H-T and comprises four rectangular waveguide tubes, wherein the four rectangular waveguide tubes are respectively an H-T waveguide tube and an E-face branch waveguide tube which are formed by a first waveguide tube, a second waveguide tube and a third waveguide tube together, each rectangular waveguide tube is provided with a standard waveguide port, a matching frustum and a matching cylinder are arranged at the joint of the H-T waveguide tube and the E-face branch waveguide tube, and the first waveguide tube, the second waveguide tube, the third waveguide tube and the E-face branch waveguide tube are subjected to the same height reduction treatment.
The height reduction processing means that the heights and widths of four rectangular waveguides are reduced, and for the Q wave band, the height A of the rectangular waveguide is reduced1Taking 2.5-2.7mm, reducing the width B of the rectangular waveguide1＝1/2A1；
For the U wave band, the height A of the rear rectangular waveguide is reduced1Taking 2.1-2.3mm as the width B of the rectangular waveguide1＝1/2A1。
In matching, for the Q-band, four rectangular waveguide lengths L1Taking 5.0; radius R of lower side of matching frustum1Take 3.0, the radius of the upper cylinder R2Take 0.25, height L2Taking 1.6; length L of column of matching column3Taking 1.6; the distance from the axis of the matched cylinder to the end surface of the E-surface branch waveguide tube is M1Taking 1.2; in mm.
In contrast, for the U-band, four rectangular waveguide lengths L1Taking 5.0; radius R of lower side of matching frustum1Take 2.6, radius of upper cylinder R2Taken at 0.2, height L2Taking 1.3; length L of column of matching column3Taking 1.3; radius of the upper cylinder R1And A has a central straight line distance of M1Taking 1.0; in mm.
The utility model discloses following beneficial effect has:
compare with current magic T, the utility model discloses based on two-sided rectangle waveguide stair structure, through the height and the width that reduce waveguide magic T, effectively widened magic T's working bandwidth, extended to the full wave band from current 80% waveguide bandwidth, it is big to have working bandwidth, superior performance, the advantage that range phase place uniformity is good.
The utility model discloses based on two-sided rectangular waveguide stair structure, matching structure is simple, easily manufacturing, and it is high to have production efficiency, low in production cost's characteristics.
Drawings
FIG. 1 is a three-dimensional block diagram of the present invention;
FIG. 2 shows that the present invention follows B at the Q-band S parameter1A graph of varying simulation results;
FIG. 3 shows that the present invention is applied to the U-band S parameter with B1A graph of varying simulation results;
in the figure: 1-a first waveguide; 2-a second waveguide; 3-a third waveguide; 4-E surface branch waveguide tube; 5-matching a frustum; 6-matching cylinders; 7-standard waveguide port; 8-standard waveguide port; 9-standard waveguide port.
Detailed Description
The first embodiment is as follows:
the utility model discloses a full wave band magic T based on two-sided ladder rectangular waveguide, three-dimensional structure chart is shown in fig. 1, is formed by E-T and H-T joint, including four rectangular waveguide pipes, be respectively by first waveguide pipe 1, second waveguide pipe 2 and third waveguide pipe 3 constitute H-T waveguide pipe and E face stub waveguide pipe 4 jointly, every rectangular waveguide configuration a standard waveguide port, be respectively accurate waveguide port 7, standard waveguide port 8, standard waveguide port 9; the connecting part of the H-T waveguide tube and the E-surface branch waveguide tube is provided with a matching frustum 5 and a matching cylinder 6, and the first waveguide tube 1, the second waveguide tube 2, the third waveguide tube 3 and the E-surface branch waveguide tube 4 are subjected to the same height reduction treatment.
The height reduction processing means that the heights and widths of four rectangular waveguides are reduced, and for the Q wave band, the height A of the rectangular waveguide is reduced1Taking 2.5-2.7mm, reducing the width B of the rectangular waveguide1＝1/2A1；
For the U wave band, the height A of the rear rectangular waveguide is reduced1Taking 2.1-2.3mm as the width B of the rectangular waveguide1＝1/2A1。
In matching, for the Q-band, four rectangular waveguide lengths L1Taking 5.0; radius R of lower side of matching frustum1Get 30, radius of upper cylinder is R2Take 0.25, height L2Taking 1.6; length L of column of matching column3Taking 1.6; the distance from the axis of the matched cylinder to the end surface of the E-surface branch waveguide tube is M1Taking 1.2; in mm.
In contrast, for the U-band, four rectangular waveguide lengths L1Taking 5.0; radius R of lower side of matching frustum1Take 2.6, radius of upper cylinder R2Taken at 0.2, height L2Taking 1.3; length L of column of matching column3Taking 1.3; radius of the upper cylinder R1And A has a central straight line distance of M1Taking 1.0; in mm.
One end of the H-T waveguide tube is communicated with the inner cavity of the E-surface branch waveguide tube, the center of the H-T waveguide tube is positioned on the same plane where the section of the E-surface branch waveguide tube is positioned, the matching frustum 5 is arranged on the inner wall of the middle part of the E-surface branch waveguide tube, and one end of the matching cylinder 6 is fixed at the top of the matching frustum 5.
The rectangular waveguide magic T is a four-port coupler, an input signal on a first waveguide tube port is equally divided into two phase signals with balanced amplitude, the phase signals on a collinear port are isolated from an E-surface port, the signal input to the E-surface port is equally divided into two signals with 180-degree amplitude balanced phase difference at the collinear port (E surface), and the two signals are isolated from the first waveguide tube port. The in-phase and constant amplitude signals input to the two collinear ports produce a combined signal at the first waveguide port and a cancellation signal at the E-plane port. Because the magic T belongs to a reciprocal device, the positions of the second waveguide port and the third waveguide port can be changed when the magic T is used, and the functions are the same.
The utility model is L to length1The size of the waveguide tube is reduced, and the matching frustum 5 and the matching cylinder 6 play a role in adjusting the impedance between the waveguide tubes. As shown in FIG. 1, variables A and B are the height and width dimensions of a standard waveguide, A1And B1Is the waveguide size after the height reduction, L1Is the waveguide length (unchanged, not reduced). The lower radius of the internal matching cone is R1Radius of the upper cylinder being R2The height of the matching frustum is L2(ii) a The length of the matching column is L3Of (i) aRadius of the matching cylinder is R2(ii) a The distance from the axis of the matched cylinder to the end surface of the E-surface branch waveguide tube is M1。
Example two:
the example is specifically designed as follows:
the utility model discloses a full wave band magic T structure based on two-sided ladder rectangular waveguide, its performance index requires as follows:
table 1 is the present invention shows the dimension list of each waveguide corresponding to Q band and U band.
FIG. 2 shows the waveguide size table corresponding to the Q-band and U-band mixers of the present invention, wherein A and A1Are respectively B and B1B of magic T with two different frequency bands1Final application values were 2.7mm and 2.3 mm; a of magic T with two different frequency bands1The final application values were 5.4mm and 4.6 mm.
Four rectangular waveguide lengths L for the Q-band1Taking 5.0; radius R of lower side of matching frustum1Take 3.0, the radius of the upper cylinder R20.25 is taken and matched with the height L of the frustum2Taking 1.6; length L of column of matching column3Taking 1.6; radius of the upper cylinder R1And A has a central straight line distance of M1Taking 1.2; in mm.
For the U-band, four rectangular waveguide lengths L1Taking 5.0; radius R of lower side of matching frustum1Take 2.6, radius of upper cylinder R2Take 0.2, match the frustum height L2Taking 1.3; length L of column of matching column3Taking 1.3; radius of the upper cylinder R1And A has a central straight line distance of M1Taking 1.0; in mm.
The utility model discloses to Q wave band and U wave band S parameter along with B1The simulation results of the changes are graphically shown in fig. 3. It can be found that the conventional Magic Tees (B)1＝B,A1Performance degradation at high band edge of a), introduction of double-sided stepped rectangular waveguide, with B1When the values of (a) and (b) are respectively reduced to 2.5-2.7mm and 2.1-2.3mm, the insertion loss (| S) of the high-frequency edge is reduced21Greatly increased, | S return loss11|) is greatly reduced. Magic T for Q wave band and U wave bandThe resonant frequency point moves to a higher frequency band and the response curve flattens out within the specified frequency band.
The magic T after the height reduction treatment has flat frequency response curves in a Q wave band of 33-55GHz and a U wave band of 40-60GHz, input return loss of less than 14dB and additional insertion loss of less than 0.3dB, and has the characteristics of low insertion loss and flat frequency response in the whole wave band range.
Typical operating bandwidth: for the full frequency bands of Q and U wave bands, the return loss is larger than 14 dB; the additional insertion losses are all less than 0.3 dB.
Above example only is for convenient the description the utility model discloses, the utility model discloses can be applied to the magic T design of other frequency bands, the rectangle paster is confirmed according to corresponding working frequency channel with size, quantity, interval and circuit layout etc. between each paster of radial paster.
TABLE 1
Claims (4)
1. The utility model provides a full wave section magic T based on two-sided ladder rectangular waveguide, forms by E-T and H-T joint, includes four rectangular waveguide pipes, is respectively for forming H-T waveguide pipe and E face tributary waveguide pipe jointly by first waveguide pipe, second waveguide pipe and third waveguide pipe, and every rectangular waveguide disposes a standard waveguide port, and H-T waveguide pipe and E face tributary waveguide pipe junction are equipped with and match frustum and match cylinder, its characterized in that: the first waveguide, the second waveguide, the third waveguide and the E-plane branched waveguide are subjected to the same height reduction treatment.
2. The full-wave-band magic T based on the double-sided stepped rectangular waveguide as claimed in claim 1, wherein: the height reduction processing means that the heights and the widths of four rectangular waveguides are reduced, and for a Q wave band, the height A of the rectangular waveguide is reduced1Taking 2.5-2.7mm, reducing the width B of the rectangular waveguide1=1/2A1(ii) a For the U wave band, the height A of the rear rectangular waveguide is reduced1Taking 2.1-2.3mm, reduced rectangular waveguideWidth B1=1/2A1。
3. The full-waveband magic T based on the double-sided stepped rectangular waveguide as claimed in claim 2, wherein: in matching, for the Q-band, four rectangular waveguide lengths L1Taking 5.0; radius R of lower side of matching frustum1Take 3.0, the radius of the upper cylinder R2Take 0.25, height L2Taking 1.6; length L of column of matching column3Taking 1.6; the distance from the axis of the matched cylinder to the end surface of the E-surface branch waveguide tube is M1Taking 1.2; in mm.
4. The full-waveband magic T based on the double-sided stepped rectangular waveguide as claimed in claim 2, wherein: in contrast, for the U-band, four rectangular waveguide lengths L1Taking 5.0; radius R of lower side of matching frustum1Take 2.6, radius of upper cylinder R2Taken at 0.2, height L2Taking 1.3; length L of column of matching column3Taking 1.3; radius of the upper cylinder R1And A has a central straight line distance of M1Taking 1.0; in mm.
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| CN202020427487.2U CN211556091U (en) | 2020-03-30 | 2020-03-30 | Full-wave-band magic T based on double-sided stepped rectangular waveguide |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113161709A (en) * | 2021-03-30 | 2021-07-23 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Broadband millimeter wave hybrid waveguide magic T power divider/synthesizer |
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2020
- 2020-03-30 CN CN202020427487.2U patent/CN211556091U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113161709A (en) * | 2021-03-30 | 2021-07-23 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Broadband millimeter wave hybrid waveguide magic T power divider/synthesizer |
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