CN220628205U - Low-frequency ultra-wideband microstrip one-to-four power divider - Google Patents
Low-frequency ultra-wideband microstrip one-to-four power divider Download PDFInfo
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- CN220628205U CN220628205U CN202320082626.6U CN202320082626U CN220628205U CN 220628205 U CN220628205 U CN 220628205U CN 202320082626 U CN202320082626 U CN 202320082626U CN 220628205 U CN220628205 U CN 220628205U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The utility model discloses a low-frequency ultra-wideband microstrip one-to-four power divider, which belongs to the field of low-frequency ultra-wideband technology application, and comprises a microstrip circuit, a shell and a cover plate, wherein the microstrip circuit is arranged on a circuit board and comprises a first stepped power divider, a second stepped power divider and a third stepped power divider, two output lines are led out from the output end of the first stepped power divider, and the two output lines are respectively connected with the input ends of the second stepped power divider and the third stepped power divider; the second and third stepped power dividers are symmetrically arranged and connected with the output ends of the first stepped power divider, and the output ends of the second and third stepped power dividers respectively lead out two output lines. Compared with the existing structure, the microstrip power divider utilizes a method of cascading multiple sections of impedance converters to form the first, second and third ladder-type power dividers, so that the power dividers with preset sections are distributed in a ladder shape, the passband bandwidth of the power divider can be obviously improved, and the bandwidth of the ultra-wideband power divider reaches 12.5 octaves.
Description
Technical Field
The utility model belongs to the field of low-frequency ultra-wideband technology application, and particularly relates to a low-frequency ultra-wideband microstrip one-to-four power divider.
Background
A power divider (simply called a power divider) is a passive device that divides an input signal into two or more equal or unequal power signals. The bisection power divider is a three-port network, and the common lossless reciprocal three-port network cannot achieve complete matching, the output ports are not isolated, the isolation requirements on the ports in engineering are higher, and the Wilkinson power divider introduces an isolation resistor R in the simple power divider, so that the matching of the ports and the high isolation between the output ports are realized.
The working broadband of the existing single-section Wilkinson power divider is narrow, and the broadband power divider cannot be realized. Particularly, when the working frequency range is 70 MHz-900 MHz, the design requirement frequency is low, the bandwidth is wide, the number of stages is large, the microstrip line length is too long, and wiring is difficult in the limited structural size, so that how to use the minimum number of nodes to meet the bandwidth requirement is a technical problem to be solved urgently, and particularly how to design a low-frequency ultra-wideband microstrip quarter-power divider which is miniaturized as much as possible.
Disclosure of Invention
Aiming at the technical problems, the utility model provides a low-frequency ultra-wideband microstrip one-to-four power divider, which adopts a method that the microstrip power divider utilizes a plurality of sections of impedance converters to form a first step-shaped power divider, a second step-shaped power divider and a third step-shaped power divider, so that the power dividers with preset sections are distributed in a step shape, the passband bandwidth of the power divider can be obviously improved, and the bandwidth of the ultra-wideband power divider reaches 12.5 octaves.
The utility model solves the problems by the following technical means:
the utility model provides a low frequency ultra wide band microstrip divides four merit to divide ware, its characterized in that includes the microstrip circuit who sets up on the circuit board, microstrip circuit includes first cascaded merit and divides ware, second cascaded merit and divides ware and third cascaded merit and divide ware, wherein: two output lines are led out from the output end of the first stepped power divider, and the two output lines are respectively connected with the input ends of the second stepped power divider and the third stepped power divider; the second stepped power divider and the third stepped power divider are symmetrically arranged and are positioned at one side of the first stepped power divider, and two output lines are respectively led out from the output ends of the second stepped power divider and the third stepped power divider; the first stepped power divider, the second stepped power divider and the third stepped power divider comprise 5-10 power divider units, and each power divider unit consists of a 1/4 wavelength multisection impedance converter and an isolation resistor in the middle.
Preferably, the first stepped power divider, the second stepped power divider and the third stepped power divider each comprise 7 wilkinson power divider units.
Preferably, the circuit board is a T-type circuit board structure.
Preferably, the power divider further comprises a housing for mounting the circuit board and the power divider, wherein: a T-shaped cavity is formed in the shell, and isolation cavities are symmetrically formed in two sides of the bottom of the T-shaped cavity; an input port is arranged on one side of the shell, and a radio frequency connector for connecting the input end of the first stepped power divider is arranged on the input port; one side of the shell is provided with four output ports, the output ports are provided with radio frequency connections, and the radio frequency connectors are correspondingly connected with four output ends of the second step power divider and the third step power divider.
Preferably, the circuit board further comprises a cover plate arranged on the shell, a top connecting hole is formed in the cover plate, a middle connecting hole is formed in the position, corresponding to the top connecting hole, of the circuit board, and a bottom connecting hole is formed in the position, corresponding to the middle connecting hole, of the shell.
Preferably, four corners of the shell are concaved downwards to form a connecting table, and through holes are formed in the connecting table.
The low-frequency ultra-wideband microstrip one-to-four power divider has the following beneficial effects:
the utility model provides a low-frequency ultra-wideband power divider, which is characterized in that a first stepped power divider, a second stepped power divider and a third stepped power divider are formed by adopting a method that a microstrip power divider utilizes a plurality of sections of impedance converters to be cascaded, so that the power dividers with preset sections are distributed in a stepped manner, the passband bandwidth of the power divider can be improved, the bandwidth of the ultra-wideband power divider can reach 12.5 octaves, and 10 octaves exceeding a theoretical value can cover the whole frequency band of 70 MHz-900 MHz. And the product defect of the microstrip type power divider in the ultra-wideband of the low frequency band less than 1GHz is overcome. In addition, the standing wave ratio of the power divider is less than 1.35, the insertion loss is less than or equal to 8.5dB, and the output isolation is more than 20dB. The performance of the whole frequency band is good, and the requirements of low standing wave and high isolation can be realized.
Drawings
In order to more clearly illustrate the technical solutions of the present utility model, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a multi-section 1/4 wavelength stepped impedance transformer;
FIG. 2 is a schematic diagram of the overall structure of the power divider of the present utility model;
FIGS. 3 and 4 are schematic diagrams of microstrip circuit boards of the present utility model;
fig. 5 is a schematic view of the housing structure of the present utility model.
The multi-section impedance transformer comprises a 1-circuit board, a 101-middle connecting hole, a 2-microstrip circuit, a 201-first stepped power divider, a 202-second stepped power divider, a 203-third stepped power divider, a 204-1/4 wavelength multi-section impedance transformer, a 205-isolation resistor, a 3-shell, a 301-T cavity, a 302-isolation cavity, a 303-input port, a 304-output port, a 305-bottom connecting hole, a 306-connecting table, a 4-cover plate and a 401-top connecting hole.
Description of the embodiments
In the description of the present utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.
The present utility model will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1 to 5, a low-frequency ultra-wideband microstrip quarter-turn power divider comprises a microstrip circuit 2 arranged on a circuit board 1, wherein the microstrip circuit 2 comprises a first stepped power divider 201, a second stepped power divider 202 and a third stepped power divider 203, two output lines are led out from the output end of the first stepped power divider 201, and the two output lines are respectively connected with the input ends of the second stepped power divider 202 and the third stepped power divider 203; the second stepped power divider 202 and the third stepped power divider 203 are symmetrically arranged and are located at one side of the first stepped power divider 201, two output lines are respectively led out from the output ends of the second stepped power divider 202 and the third stepped power divider 203, it is to be noted that the first stepped power divider 201, the second stepped power divider 202 and the third stepped power divider 203 all comprise 5 to 10 power divider units, each power divider unit is composed of a 1/4 wavelength multisection impedance transformer 204 and an isolation resistor 205 in the middle, devices connected between microstrip lines are all isolation resistors 205, and the specification values of the isolation resistors are different.
In this embodiment, two output ports of the first stepped power divider are connected to an input port of the second stepped power divider and an input port of the third stepped power divider, and the 4-way equal power divider is realized through a one-to-two, two-to-four structure, and each stepped power divider is completed in a phase cascade manner, and three stepped power dividers are connected to complete the design of the entire one-to-four power divider circuit board. Specifically, the first stepped power divider 201, the second stepped power divider 202 and the third stepped power divider 203 all include 7 Wilkinson power divider units, the working broadband of the single Wilkinson power divider is a narrow band, and the broadband power divider cannot be realized, so that the working band is widened by adopting a mode of cascading multiple 1/4 wavelength impedance converters, and fig. 1 is a schematic diagram of an N-section 1/4 wavelength stepped impedance converter.
In the figure, the circuit board 1 is of a T-shaped circuit board structure, a T-shaped cavity 301 is arranged in the shell 3, and isolation cavities 302 are symmetrically arranged on two sides of the bottom of the T-shaped cavity 301; an input port 303 is arranged on one side of the shell 3, and a radio frequency connector for connecting the input end of the first stepped power divider 201 is arranged on the input port 303; four output ports 304 are arranged on one side of the shell 3, radio frequency connection is arranged on the output ports 304, and the radio frequency connector is correspondingly connected with four output ends of the second stepped power divider 202 and the third stepped power divider 203. Specifically, be provided with apron 4 on casing 3, be provided with top connecting hole 401 on the apron 4, circuit board 1 corresponds the position of top connecting hole 401 and is provided with middle part connecting hole 101, and casing 3 corresponds the position of middle part connecting hole 101 and is provided with bottom connecting hole 305, and the four corners of casing 3 is concave downwards to form the connection platform 306, is provided with the through-hole on the connection platform 306, passes through screw connection between casing 3 and the apron 4.
During actual production, the first stepped power divider, the second stepped power divider and the third stepped power divider all adopt microstrip transmission lines with characteristic impedance of 50 omega, isolation resistors all adopt thin film resistors for improving isolation, a Rogowski substrate is selected as a circuit board, a substrate material is a ceramic powder filled glass fiber reinforced hydrocarbon laminated board, microstrip line metal layers are uniformly distributed on the circuit board substrate, an input port and an output port are connected with radio frequency connectors, the input port and the output port are all 50 ohm SMA female heads, and a cavity and a cover plate are made of conductive aluminum oxide alloy materials.
It should be further described that, in this embodiment, the microstrip power divider adopting Wilkinson structure is designed by utilizing a method of cascade connection of multiple impedance transformers in low frequency band and ultra wideband, so that a power divider capable of realizing 12.5 octaves through 7-section 1/4-wavelength stepped impedance transformers is designed, which is greater than the theoretical value of 10 octaves achieved by 7 energy conservation, and the product defect of ultra wideband of the microstrip power divider in the low frequency band less than 1GHz is overcome. On the premise of keeping the transmission impedance of the connector to 50 omega and under the condition that the external structural dimension allows, the low-frequency ultra-wideband power divider with the frequency multiplication of more than 10 frequency multiplication can be designed by increasing the node number of the impedance converter, such as the mode of 8-node phase cascade connection by means of the design structure of the utility model.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (6)
1. The utility model provides a low frequency ultra wide band microstrip divides four merit respectively, its characterized in that includes microstrip circuit (2) that set up on circuit board (1), microstrip circuit (2) include first cascaded merit divide ware (201), second cascaded merit divide ware (202) and third cascaded merit divide ware (203), wherein:
two output lines are led out from the output end of the first stepped power divider (201), and are respectively connected with the input ends of the second stepped power divider (202) and the third stepped power divider (203);
the second stepped power divider (202) and the third stepped power divider (203) are symmetrically arranged and are positioned on one side of the first stepped power divider (201), and two output lines are respectively led out from the output ends of the second stepped power divider (202) and the third stepped power divider (203);
the first stepped power divider (201), the second stepped power divider (202) and the third stepped power divider (203) comprise 5 to 10 power divider units, and each power divider unit consists of a 1/4 wavelength multisection impedance converter (204) and an isolation resistor (205) in the middle.
2. The low frequency ultra wideband microstrip quarter wave power divider of claim 1, wherein the first stepped power divider (201), the second stepped power divider (202), and the third stepped power divider (203) each comprise a 7-section wilkinson power divider unit.
3. The low-frequency ultra-wideband microstrip quarter-turn splitter according to claim 1, wherein said circuit board (1) is a T-shaped circuit board structure.
4. The low frequency ultra wideband microstrip quarter wave divider according to claim 1, further comprising a housing (3) for mounting the circuit board (1) and the microstrip circuit (2), wherein:
a T-shaped cavity (301) is formed in the shell (3), and isolation cavities (302) are symmetrically formed in the two sides of the bottom of the T-shaped cavity (301);
an input port (303) is arranged on one side of the shell (3), and a radio frequency connector for connecting the input end of the first step-type power divider (201) is arranged on the input port (303);
four output ports (304) are arranged on one side of the shell (3), radio frequency connection is arranged on the output ports (304), and the radio frequency connector is correspondingly connected with four output ends of the second step power divider (202) and the third step power divider (203).
5. The low-frequency ultra-wideband microstrip quarter-turn splitter according to claim 1, further comprising a cover plate (4) disposed on the housing (3), wherein a top connection hole (401) is disposed on the cover plate (4), a middle connection hole (101) is disposed at a position of the circuit board (1) corresponding to the top connection hole (401), and a bottom connection hole (305) is disposed at a position of the housing (3) corresponding to the middle connection hole (101).
6. The low-frequency ultra-wideband microstrip quarter-turn splitter according to claim 5, wherein four corners of said housing (3) are recessed to form a connection stage (306), and a through hole is provided on the connection stage (306).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320082626.6U CN220628205U (en) | 2023-01-28 | 2023-01-28 | Low-frequency ultra-wideband microstrip one-to-four power divider |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320082626.6U CN220628205U (en) | 2023-01-28 | 2023-01-28 | Low-frequency ultra-wideband microstrip one-to-four power divider |
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| Publication Number | Publication Date |
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| CN220628205U true CN220628205U (en) | 2024-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320082626.6U Active CN220628205U (en) | 2023-01-28 | 2023-01-28 | Low-frequency ultra-wideband microstrip one-to-four power divider |
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|---|---|
| CN (1) | CN220628205U (en) |
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2023
- 2023-01-28 CN CN202320082626.6U patent/CN220628205U/en active Active
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