CN111755790A - TE based on coaxial waveguide01Modulo arbitrary multi-path power divider/combiner - Google Patents
TE based on coaxial waveguide01Modulo arbitrary multi-path power divider/combiner Download PDFInfo
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- CN111755790A CN111755790A CN202010563409.XA CN202010563409A CN111755790A CN 111755790 A CN111755790 A CN 111755790A CN 202010563409 A CN202010563409 A CN 202010563409A CN 111755790 A CN111755790 A CN 111755790A
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- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/12—Coupling devices having more than two ports
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Abstract
The invention mainly relates to the technical field of millimeter wave power synthesis, and particularly provides a TE based coaxial waveguide01Any multi-path power splitting/combining device of mode to meet the power splitting/combining of coaxial waveguide structures of different sizes. The invention comprises the following steps: coaxial input waveguide, N transition waveguide structures, N standard rectangular waveguides and working mode TE of coaxial input waveguide01And in the mode, one end of the waveguide is used as an input/output port, N transition waveguide structures are arranged at equal intervals along the side wall at the other end of the waveguide, and the other end of each transition waveguide structure is connected with a standard rectangular waveguide to form N output/input ports. The input waveguide adopts the coaxial waveguide to realize equal-amplitude power division and higher power synthesis efficiency of multipath signals, and simultaneously adopts a transition waveguide structure to form reactance matching between the coaxial waveguide and the rectangular waveguide, thereby effectively widening the working bandwidth of the multipath power divider/synthesizer; in addition, the invention has simple structure, few parts, good integrity and easy processing.
Description
Technical Field
The invention mainly relates to the technical field of millimeter wave power synthesis, and particularly provides a TE based coaxial waveguide01Modulo arbitrary multi-way power divider/combiner.
Background
The millimeter wave power source is one of the core components of the millimeter wave system, is a research hotspot in the millimeter wave field, is widely applied to the fields of military radar system space, short-distance wireless high-speed transmission and the like, and has great application value and market prospect. Generally, there are two main approaches to microwave millimeter wave high power acquisition: vacuum electronic power devices and solid state power devices; the electric vacuum device comprises a traditional klystron and a traveling wave tube power amplifier, which can provide high-power output, but have the disadvantages of difficult process realization, mass production incapability, high working voltage, large volume, low reliability, short service life and low linearity, and the application of the electric vacuum device in the microwave and millimeter wave field is limited; the solid-state power amplifier has the advantages of small volume, light weight, low working voltage, good reliability and the like, but as the frequency rises to a millimeter wave frequency band, the size of a solid-state chip is reduced, the solid-state power amplifier is influenced by factors such as semiconductor physical characteristics, processing technology, impedance matching, chip heat dissipation and the like, the output power of a single chip is limited, and the requirements of a high-power system cannot be met.
In practical application, although the electric vacuum device can provide high power, the single tube power is too large, and power distribution is needed, so that the integration level of the vacuum device is influenced; solid state devices, in contrast, require power combining due to the limited output power provided by a single chip. A class of devices is needed that meets the above power allocation or combining requirements and has strong versatility. In recent years, power and technology of microwave millimeter wave have been developed rapidly, and various power distribution and synthesis circuits have been proposed and applied successively. Therefore, waveguide-based spatial power synthesis techniques have been in place in the nineties. The space power synthesis technology based on the waveguide has the advantages of high synthesis efficiency, wide bandwidth ratio, capability of effectively preventing radiation loss, good heat dissipation performance, simple structure, easiness in implementation and the like. Meanwhile, the waveguide-based high-power output device can work in microwave, millimeter wave and higher submillimeter wave frequency bands without being limited by working frequency and waveguide size, and effectively solves the problem of realizing high-power output in higher frequency bands.
The power divider is used as a key device in the power combining circuit, directly influences the power combining efficiency, and not only requires that the distribution amplitude and the distribution phase have consistency, but also requires that the ports have higher isolation. The power divider based on the coaxial waveguide form has the characteristics of interference resistance, low loss, wide working frequency band and the like while meeting related indexes, and has incomparable advantages compared with the conventional power divider; based on the technical scheme, the invention adopts a coaxial waveguide technical route and provides a TE based on a coaxial waveguide01Modulo arbitrary multi-way power divider/combiner.
Disclosure of Invention
The present invention is directed to overcoming the above-mentioned shortcomings of the prior art and providing a TE based coaxial waveguide01Any multi-path power divider/combiner of modes to meet the power division/combination of coaxial waveguide structures of different sizes.
In order to achieve the purpose, the invention adopts the technical scheme that:
TE based on coaxial waveguide01A modular arbitrary multi-path power divider/combiner comprising: the waveguide structure comprises a coaxial input waveguide, N transition waveguide structures and N standard rectangular waveguides; characterized in that the operating mode TE of the coaxial input waveguide01In the mode, one end of a coaxial input waveguide is used as an input/output port, and N transition waveguide structures are arranged at equal intervals along the side wall at the other end of the coaxial input waveguide; the N transition waveguide structures have the same structure, the other end of each transition waveguide structure is connected with a standard rectangular waveguide, and the N standard rectangular waveguides are used as N output/input ports; n is more than or equal to 2.
Further, the axial length of the coaxial input waveguide is larger than 1 lambda, the inner radius of the coaxial input waveguide is smaller than the outer radius by 0.5 lambda-0.55 lambda, and lambda is the working wavelength.
Furthermore, the arc length of the connecting port of the transition waveguide structure and the coaxial input waveguide is 0.86 lambda-0.96 lambda, and the circumferential distance between the two transition waveguide structures is 1.19 lambda-1.59 lambda.
Further, the rectangular waveguide has a length of at least 2 λ.
Further, the transition waveguide structure adopts a straight-side trapezoidal waveguide, a curved-side trapezoidal waveguide or a step waveguide.
Compared with the prior art, the invention has the following beneficial effects:
(1) the input waveguide adopts the coaxial waveguide, and has the advantages of interference resistance, low loss, wide working frequency band and the like; the optimized inner and outer diameters of the coaxial waveguide ensure that the coaxial waveguide is at TE01Stable operation in mode for a long time and TE in coaxial waveguide01The field structure of the mode has space-time symmetry about the circle center, and can be better used for radial power distribution to obtain equal-amplitude power distribution of a plurality of paths of signals; thus, a high power combining efficiency can be achieved when the power combiner is used.
(2) The number of the distributing/synthesizing branches is large, the power distributor with more branches is realized by increasing the inner radius and the outer radius of the coaxial waveguide, the width of the transition waveguide structure is larger than that of the standard rectangular waveguide, reactance matching is formed between the coaxial waveguide and the rectangular waveguide, the working bandwidth of the transition structure can be effectively widened, and therefore the working bandwidth of the multi-path power distributor/synthesizer is widened.
(3) The invention adopts the metal waveguide, and has lower insertion loss and higher power capacity; each part of the device has simple structure, few parts, good integrity, easy processing and effectively ensured assembly precision.
Drawings
FIG. 1 shows a coaxial waveguide TE-based device of the present invention01A schematic diagram of a modular arbitrary multi-path power divider/combiner;
FIG. 2 is a schematic diagram of the structure of various transition waveguides in the present invention;
FIG. 3 shows a coaxial waveguide-based TE in an embodiment of the present invention01An S parameter map of arbitrary multi-path power allocation of the modes;
wherein: 1 is a coaxial input waveguide, 2 is a transition waveguide structure, and 3 is a standard rectangular waveguide; 2-1, 2-2, 2-3 and 2-4 are transition waveguides with various shapes.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflicting with each other. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described and thus the scope of the present invention is not limited by the specific embodiments disclosed below.
In this embodiment, the working frequency is 35Ghz (the corresponding working wavelength λ is about 8.6mm) and the TE is operated01An 8-way coaxial power divider in a mode state is taken as an example, and the structure of the power divider is shown in fig. 1; the method comprises the following steps: the coaxial waveguide comprises 1 coaxial input waveguide, 8 transition waveguide structures 2 and N standard rectangular waveguides 3; one end of the coaxial input waveguide 1 serves as an input port, 8 transition waveguide structures are arranged at equal intervals along the side wall at the other end of the coaxial input waveguide 1, the other end of each transition waveguide structure is connected with a standard rectangular waveguide (BJ320) to form 8 paths of output, and the other ends of the 8 standard rectangular waveguides serve as output ports respectively; more specifically, TE01Waves are input from a coaxial input port and distributed to various output ports, TE, in constant amplitude01Conversion of waves into TE via transition waveguides10The modes are output through a standard rectangular waveguide.
In this embodiment, the arc length a of the connection port between the transition waveguide structure 2 and the coaxial input waveguide 1 is 0.89 λ, and the circumferential distance b between the two transition waveguide structures is 1.25 λ, so the outer circumference of the coaxial input waveguide is 8 × (a + b), and the outer diameter is calculated, and the inner radius is smaller than the outer radius by 0.54 λ; the transition waveguide structure can be made of a straight-side trapezoid, a curved-side trapezoid, a step waveguide and the like, as shown in fig. 2, 2-1, 2-2, 2-3 and 2-4 are respectively a trapezoid transition waveguide, a rounded rectangular transition waveguide, a curved-side trapezoid transition waveguide and a corner-cut rectangular transition waveguide; the present embodiment employs a straight-sided trapezoidal waveguide.
More specifically, in this embodiment, the axial length of the coaxial input waveguide is 20.0mm, the nominal size of the radius of the inner conductor of the coaxial input waveguide is 7.7mm, the radius of the outer conductor of the coaxial input waveguide is 12.4mm, and the material of the coaxial input waveguide is oxygen-free copper; the wider port of the transition waveguide (compared with the standard rectangular waveguide) is embedded into the coaxial waveguide by 1.50mm, the arc length of the port is 8.65mm, the height of the port is 7.112mm, the radial length of the transition waveguide is 7.0mm, and the other port of the transition waveguide is connected with the standard rectangular waveguide BJ320(7.112mm multiplied by 3.556 mm); the rectangular waveguide length is 20 mm.
After simulation test, the S parameter diagram of the power divider is shown in FIG. 3, when the operating frequency is 35Ghz and TE is input01When the device works in a mode, the insertion loss is less than 0.3dB in a frequency range of 34.2-35.8 GHz, and the device has the characteristics of wide frequency band, low insertion loss and high-efficiency synthesis; can be used as a distribution/synthesis device of high-power output. The present embodiment may also add existing mature matching techniques at the bottom of the coaxial input waveguide to further reduce insertion loss and improve bandwidth.
While the invention has been described with reference to specific embodiments, any feature disclosed in this specification may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise; all of the disclosed features, or all of the method or process steps, may be combined in any combination, except mutually exclusive features and/or steps.
Claims (5)
1. TE based on coaxial waveguide01A modular arbitrary multi-path power divider/combiner comprising: the waveguide structure comprises a coaxial input waveguide, N transition waveguide structures and N standard rectangular waveguides; characterized in that the operating mode TE of the coaxial input waveguide01In the mode, one end of a coaxial input waveguide is used as an input port, and N transition waveguide structures are arranged at equal intervals along the side wall at the other end of the coaxial input waveguide; the N transition waveguide structures have the same structure, and the other end of each transition waveguide structure is connected with a standard rectangular waveguide; n is more than or equal to 2.
2. TE based on coaxial waveguide according to claim 101Any multi-path power divider/combiner of modes, characterized in that the axial length of the waveguide of the coaxial input waveguide is larger than 1 lambda, and the inner radius of the coaxial input waveguide is larger than the outer radius0.5 lambda-0.55 lambda smaller, and lambda is the working wavelength.
3. TE based on coaxial waveguide according to claim 101The arbitrary multi-path power divider/combiner of the mode is characterized in that the arc length of a connecting port of the transition waveguide structure and the coaxial input waveguide is 0.94 lambda-0.96 lambda, and the circumferential distance between the two transition waveguide structures is 1.19 lambda-1.59 lambda.
4. TE based on coaxial waveguide according to claim 101Arbitrary multi-power divider/combiner of modes, characterized in that said rectangular waveguide length is at least 2 λ.
5. TE based on coaxial waveguide according to claim 101The arbitrary multi-path power divider/synthesizer of the mode is characterized in that the transition waveguide structure adopts a straight-side trapezoid, a curved-side trapezoid or a step waveguide.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010563409.XA CN111755790A (en) | 2020-06-19 | 2020-06-19 | TE based on coaxial waveguide01Modulo arbitrary multi-path power divider/combiner |
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| CN202010563409.XA CN111755790A (en) | 2020-06-19 | 2020-06-19 | TE based on coaxial waveguide01Modulo arbitrary multi-path power divider/combiner |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112701435A (en) * | 2020-12-01 | 2021-04-23 | 电子科技大学 | Coaxial TE based on angular period matching01Modal power combiner/divider |
| CN112928421A (en) * | 2021-01-21 | 2021-06-08 | 电子科技大学 | Design method of multi-path radial power divider/synthesizer |
| CN113224493A (en) * | 2021-04-30 | 2021-08-06 | 电子科技大学 | N-path waveguide space radial power distribution combiner based on coaxial TE01 mode |
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| US7385462B1 (en) * | 2005-03-18 | 2008-06-10 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Wideband radial power combiner/divider fed by a mode transducer |
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2020
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| US7385462B1 (en) * | 2005-03-18 | 2008-06-10 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Wideband radial power combiner/divider fed by a mode transducer |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112701435A (en) * | 2020-12-01 | 2021-04-23 | 电子科技大学 | Coaxial TE based on angular period matching01Modal power combiner/divider |
| CN112701435B (en) * | 2020-12-01 | 2022-03-15 | 电子科技大学 | Coaxial TE based on angular period matching01Modal power combiner/divider |
| CN112928421A (en) * | 2021-01-21 | 2021-06-08 | 电子科技大学 | Design method of multi-path radial power divider/synthesizer |
| CN112928421B (en) * | 2021-01-21 | 2022-03-15 | 电子科技大学 | Design method of multi-path radial power divider/synthesizer |
| CN113224493A (en) * | 2021-04-30 | 2021-08-06 | 电子科技大学 | N-path waveguide space radial power distribution combiner based on coaxial TE01 mode |
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