CN114142202A - Ultra-wideband two-path high-power distributor - Google Patents
Ultra-wideband two-path high-power distributor Download PDFInfo
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- CN114142202A CN114142202A CN202111431005.6A CN202111431005A CN114142202A CN 114142202 A CN114142202 A CN 114142202A CN 202111431005 A CN202111431005 A CN 202111431005A CN 114142202 A CN114142202 A CN 114142202A
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- outer conductor
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- wideband
- inner conductor
- conductor
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- H—ELECTRICITY
- 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 relates to an ultra-wideband two-path high-power distributor, and belongs to the technical field of radars. The purpose of low-loss transmission of high-power signals in a full frequency band of 6-18 GHz is achieved by selecting a square coaxial line filled with an air medium as a transmission line; the discontinuity of the T-shaped structure is compensated by introducing the lug boss at the outer conductor; by introducing an impedance transformation section at the inner conductor, a good matching of the impedance is achieved. Through the design of the links, the two-path high-power distributor with the working frequency range covering 6-18 GHz based on square coaxiality is realized.
Description
Technical Field
The invention relates to the technical field of radars, in particular to a square coaxial two-path power divider which can be applied to a radar transmitter with the working frequency range of 6-18 GHz.
Background
In radar systems, in order to increase the detection and range, the output power of the transmitter needs to be increased. With the increase of frequency, the output power of a single solid-state device can be rapidly reduced, and the output power of the devices in a microwave frequency band is only several watts; meanwhile, the frequency is increased, the wavelength is shortened, so that the space for heat dissipation and matching is smaller, and the processing difficulty is increased. Therefore, in practical application of the radar transmitter, a power divider is mostly adopted to realize high-power output.
Since the main operating frequency band of the current radar transmitter covers C-band, X-band and Ku-band, however, the operating frequency band of most radar transmitters is limited to a single band, and it is difficult to cover multiple continuous bands. Meanwhile, along with the increasing of radar functions, the requirement on the output power of a radar transmitter is higher and higher. In domestic and foreign literature, a power synthesis technology in a frequency range of 6 to 18GHz is not introduced, but a wide operating frequency range and high-power output are considered separately in most cases.
Disclosure of Invention
Technical problem to be solved
In order to avoid the defects of the prior art, the invention provides the two-path power distributor which can meet the requirement that the working frequency band is 6-18 GHz and can realize high-power output.
Technical scheme
An ultra-wideband two-path high-power distributor is characterized by comprising an outer conductor and an inner conductor; the outer conductor comprises an outer conductor shell and an outer conductor cover plate, the cross section of the port of the outer conductor is square, the inside of the port of the outer conductor is filled with air, two bosses are symmetrically arranged at the T-shaped junction of the outer conductor shell, and grooves are arranged below the corresponding bosses; the inner conductor is placed in the outer conductor, the inner conductor is solid, and the cross section of the port is square.
The inner conductor comprises 3 sections of impedance transformation sections and is in a T-shaped structure, wherein one section of impedance transformation section is positioned at the input end, and the other two sections are symmetrically positioned at the output end.
The impedance transformation section at the output end is composed of six transmission sections with different side lengths.
The boss is cylindrical.
The groove is provided with a round chamfer.
The outer conductor shell is made of aluminum.
The outer conductor cover plate is made of aluminum.
The inner conductor is made of aluminum.
Advantageous effects
According to the two-path high-power distributor with the frequency of 6-18 GHz, the square coaxial line filled with the air medium is selected as the transmission line, so that the purpose of low-loss transmission of high-power signals in a full frequency band of 6-18 GHz is achieved; the discontinuity of the T-shaped structure is compensated by introducing the lug boss at the outer conductor; by introducing an impedance transformation section at the inner conductor, a good matching of the impedance is achieved. Through the design of the links, the two-path high-power distributor with the working frequency range covering 6-18 GHz based on square coaxiality is realized. Has the following beneficial effects:
1) ultra-wideband. The whole power distribution/synthesizer adopts a T-shaped structure, and the working frequency range of the power distribution/synthesizer is ensured to cover 6-18 GHz by adopting effective compensation measures, so that the ultra-wideband is realized.
2) The power capacity is large. The air-filled square coaxial cable is used as a transmission line, and the low loss characteristic of the coaxial cable ensures that the power divider can transmit high-power signals.
3) The processing is easy. The integral structure is realized by adopting square coaxiality, and compared with the traditional circular coaxiality, the processing is easier.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout.
FIG. 1 is a schematic diagram of an overall structure of a two-way high-power distributor with the frequency of 6-18 GHz;
1-outer conductor shell, 2-outer conductor cover plate, 3-inner conductor;
FIG. 2 is a view of the outer conductor housing structure;
FIG. 3 is a schematic view of an outer conductor cover plate;
fig. 4 is a view showing the structure of an inner conductor.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The overall structure of the ultra-wideband two-path high-power distributor is schematically shown in fig. 1, the whole power distributor consists of an outer conductor shell, an outer conductor cover plate and an inner conductor, and the outer conductor shell, the outer conductor cover plate and the inner conductor are all made of aluminum. The outer conductor is a hollow cavity with three square-shaped cross sections, and comprises an outer conductor shell and an outer conductor cover plate, and the inside of the outer conductor is filled with air. Because stray fields or higher-order modes exist at the discontinuous part of the square coaxial T-shaped junction, a compensation measure needs to be adopted on the outer conductor; a groove is added right below a T-shaped junction so as to offset an inductive component caused by discontinuity of the junction; two inductive bosses are symmetrically added at the input end close to the discontinuity to counteract capacitive components caused by the discontinuity, and the bosses are cylindrical; and simultaneously, chamfering is carried out on the corner after the groove is formed so as to further reduce the reflection amount. The detailed structural dimensions of the outer conductor shell and the outer conductor cover plate are shown in tables 1 and 2.
The inner conductor is solid, the cross sections of the three ports are square, the whole body is T-shaped, the inner conductor is suspended and arranged in the outer conductor in the air, the inner conductor comprises three sections, one section is positioned at the input end, two sections of impedance transformation sections are symmetrically arranged on two sides of the T-shaped junction of the inner conductor, and each transformation section is composed of six transmission sections with different side lengths. Because the characteristic impedance of the input port is 50 omega, the characteristic impedance of the two output ports is 100 omega, when the size of the outer conductor is unchanged, the size of the inner conductor of the two support arms is 2.32 times of the size of the inner conductor of the input port, and the size of the contact surface is obviously changed suddenly. The transition section is added at the junction abrupt change position of the inner conductor, so that the remarkable deterioration of the performance index of the power divider caused by the change is alleviated; by adopting the impedance transformer, the characteristic impedance of the two output ports is transformed from 100 omega to 50 omega; broadband impedance matching is achieved by adopting a Chebyshev impedance transformer, and finally the working frequency of 6-18 GHz is covered by adopting four transformation sections. The detailed structural dimensions of the inner conductor are shown in table 3.
Through actual processing tests, the ultra-wideband two-path high-power distributor is in a full frequency band of 6-18 GHz, standing waves of an input port of the power distributor are smaller than 1.25, the amplitude difference of an output port is within 0.8dB, and the phase difference is about 10 degrees, so that the design requirements can be completely met, and the ultra-wideband two-path high-power distributor has the characteristic of high-power transmission by adopting a coaxial design based on air filling.
TABLE 1 outer conductor housing construction size
| Parameter(s) | Name (R) | Design value of the invention | Suggesting parameter values |
| a | Length of air cavity side | 5.8mm | 5.75～5.85mm |
| t1 | Outer conductor shell thickness | 6.1mm | 6.1～7.1mm |
| m3 | Inner side length of square groove | 9mm | 9mm |
| m4 | Lower side length of air cavity support arm | 25.8mm | 25.8mm |
| m5 | Upper side length of air cavity support arm | 27.9mm | 27.9mm |
| n3 | Length of air cavity input section | 16.1mm | 15.1～17.1mm |
| φ1 | Diameter of circular boss | 1.6mm | 1.6mm |
| r1 | Radius of fillet of square groove | 1mm | 1mm |
TABLE 2 structural dimensions of outer conductor cover plate
| Parameter(s) | Name (R) | Design value of the invention | Suggesting parameter values |
| m1 | Length of side of input end of external conductor | 18mm | 18～20mm |
| m2 | Outer conductorSide length of support arm | 22.3mm | 22.3mm |
| n1 | Length of input section of outer conductor | 11mm | 10～12mm |
| n2 | Length of side of output end of external conductor | 18mm | 18～20mm |
| t2 | Outer conductor cover thickness | 6.1mm | 6.1～7.1mm |
TABLE 3 inner conductor Structure dimensions
| Parameter(s) | Name (R) | Design value of the invention | Suggesting parameter values |
| b | Length of inner conductor side | 2.3mm | 2.28～2.32mm |
| b1 | Length of side of |
1mm | 1mm |
| b2 | Length of side of inner conductor |
1.44mm | 1.44mm |
| b3 | Length of side of inner conductor |
1.68mm | 1.68mm |
| b4 | Length of 4 sides of inner conductor impedance transformation section | 1.9mm | 1.9mm |
| b5 | Length of side of inner conductor impedance transformation section 5 | 2.14mm | 2.14mm |
| d1 | Length of inner conductor |
3.4mm | 3.4mm |
| d2 | Length of inner conductor |
6mm | 6mm |
| d3 | Length of inner conductor |
5.4mm | 5.4mm |
| d4 | Length of inner conductor impedance transformation section 4 | 5.4mm | 5.4mm |
| d5 | Length of the inner conductor impedance transformation section 5 | 5.4mm | 5.4mm |
| d6 | Length of inner conductor impedance transformation section 6 | 4.55mm | 4.5～4.6mm |
| b6 | Length of side of transition section of inner conductor | 2mm | 2mm |
| h1 | Length of input section of inner conductor | 17.75mm | 17～18mm |
| h2 | Length of transition section of inner conductor | 1.8mm | 1.8mm |
The invention adopts a unique air medium filled square shaft to realize the functions of a 6-18 GHz two-path high-power distributor. Its advantages are ultra-wide band, high power capacity and easy machining. The whole design is based on the square coaxial filled by the air medium, and the requirement of transmitting high-power signals is met. The working frequency range of the two-path power divider covers 6-18 GHz by introducing the lug boss and the multi-section impedance conversion section.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications or substitutions can be easily made by those skilled in the art within the technical scope of the present disclosure.
Claims (8)
1. An ultra-wideband two-path high-power distributor is characterized by comprising an outer conductor and an inner conductor (3); the outer conductor comprises an outer conductor shell (1) and an outer conductor cover plate (2), the cross section of the port of the outer conductor is square, the inside of the port of the outer conductor is filled with air, two bosses are symmetrically arranged at the T-shaped junction of the outer conductor shell, and grooves are arranged below the corresponding bosses; the inner conductor (3) is placed in the outer conductor, the inner conductor (3) is solid, and the cross section of the port is square.
2. The ultra-wideband two-way high-power divider according to claim 1, characterized in that the inner conductor (3) comprises 3 impedance transformation sections in a T-shaped structure, wherein one impedance transformation section is located at the input end, and the other two impedance transformation sections are symmetrically located at the output end.
3. The ultra-wideband two-way high-power divider as claimed in claim 2, wherein the impedance transformation section at the output end is formed by six transmission sections with different side lengths.
4. The ultra-wideband two-way high-power distributor according to claim 1, wherein the boss is cylindrical.
5. The ultra-wideband two-way high-power divider as claimed in claim 1, wherein the grooves are rounded.
6. The ultra-wideband two-way high-power divider according to claim 1, wherein the outer conductor housing is made of aluminum.
7. The ultra-wideband two-way high-power divider according to claim 1, wherein the outer conductor cover plate is made of aluminum.
8. The ultra-wideband two-way high-power divider according to claim 1, wherein the inner conductor is made of aluminum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111431005.6A CN114142202A (en) | 2021-11-29 | 2021-11-29 | Ultra-wideband two-path high-power distributor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111431005.6A CN114142202A (en) | 2021-11-29 | 2021-11-29 | Ultra-wideband two-path high-power distributor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114142202A true CN114142202A (en) | 2022-03-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111431005.6A Pending CN114142202A (en) | 2021-11-29 | 2021-11-29 | Ultra-wideband two-path high-power distributor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116799465A (en) * | 2023-07-05 | 2023-09-22 | 西南科技大学 | Ultra-wideband square coaxial power distribution synthesis structure |
-
2021
- 2021-11-29 CN CN202111431005.6A patent/CN114142202A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116799465A (en) * | 2023-07-05 | 2023-09-22 | 西南科技大学 | Ultra-wideband square coaxial power distribution synthesis structure |
| CN116799465B (en) * | 2023-07-05 | 2024-03-15 | 西南科技大学 | Ultra-wideband square coaxial power distribution synthesis structure |
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