CN105977599A - Power divider based on multistage branch structure and design method thereof - Google Patents
Power divider based on multistage branch structure and design method thereof Download PDFInfo
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- CN105977599A CN105977599A CN201610372626.4A CN201610372626A CN105977599A CN 105977599 A CN105977599 A CN 105977599A CN 201610372626 A CN201610372626 A CN 201610372626A CN 105977599 A CN105977599 A CN 105977599A
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- transmission line
- branch structure
- power splitter
- multilevel
- impedance
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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
- H01P5/16—Conjugate devices, i.e. devices having at least one port decoupled from one other port
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- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
The invention relates to the microwave technology field, and discloses a power divider based on a multistage branch structure and a design method thereof. The power divider comprises an input port, N output ports, and 2N-2 transmission lines. The input port is connected with the output ports by the multistage structure, and a node of every stage of the multistage structure is connected with the node of the last stage by one transmission line, and is connected with two nodes of the next stage by two transmission lines. The power divider is advantageous in that by adopting the multistage cascading way, power signals are divided; the structure is simple, the isolation performance is good, and the output power is large.
Description
Technical field
The present invention relates to microwave technical field, particularly relate to a kind of power splitter based on multilevel branch structure and design side
Method.
Background technology
Microwave power distributor/synthesizer is a kind of important microwave passive components and parts, is indispensable pass in communication system
One of key components and parts, are widely used in the functional circuits such as the feeding network of antenna array, power combing, RF mixing.Nineteen sixty,
Wilkinson (Wilkinson) proposes the merit separation structure of a kind of constant amplitude homophase output, and this structural principle is clear, and design parameter is simple
Understand, simultaneously by bridging resistance between the output ports, it is achieved the high-isolation between output port, thus at microwave circuit
In extensively apply.But Wilkinson power divider volume of the prior art is big, insertion loss is big, and has two and enter
The obvious shortcoming of power combiner processed, if i.e. to make output somewhat increase on having synthesized, then needs according to two
System requires to increase a series of amplifier and the power splitter of 3dB.Therefore, existing Wilkinson power divider obtains
Output is limited.
Summary of the invention
The present invention provides a kind of power splitter based on multilevel branch structure and method for designing, solves in prior art
The limited technical problem of output that Wilkinson power divider obtains.
It is an object of the invention to be achieved through the following technical solutions:
A kind of power splitter based on multilevel branch structure, including: 1 input port and N number of output port, 2N-2 bar transmits
Line, described input port is connected with described output port by multilevel hierarchy, and the every first nodes of described multilevel hierarchy, by 1
Described transmission line connects even higher level of node, is connected 2 nodes of next stage by 2 described transmission lines.
The method for designing of a kind of power splitter based on multilevel branch structure, uses multilevel hierarchy that 1 input port is divided into N
Individual output port, every first nodes in multilevel hierarchy, connect even higher level of node by 1 described transmission line, by 2 described biographies
Defeated line connects 2 nodes of next stage, and design procedure includes:
Step a: determine the working frequency range of power splitter；
Step b: according to characteristic impedance, dielectric constant, calculate flakiness ratio w/d of transmission line；
Step c: determine length of transmission line and isolation resistance impedance.
The present invention provides a kind of power splitter based on multilevel branch structure and method for designing, including: 1 input port and N
Individual output port, 2N-2 transmission lines, described input port is connected with described output port by multilevel hierarchy, described multistage knot
The every first nodes of structure, connects even higher level of node by 1 described transmission line, is connected 2 of next stage by 2 described transmission lines
Node.By the way of multi-stage cascade, being allocated power signal, simple in construction, isolation performance is good, and output is big.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
The accompanying drawing used is needed to be briefly described, it should be apparent that, the accompanying drawing in describing below is only some enforcements of the present invention
Example, for those of ordinary skill in the art, on the premise of not paying creative work, also can obtain according to these accompanying drawings
Obtain other accompanying drawing.
Fig. 1 is the structural representation of a kind of based on multilevel branch structure the power splitter of the embodiment of the present invention.
Detailed description of the invention
Understandable for enabling the above-mentioned purpose of the present invention, feature and advantage to become apparent from, real with concrete below in conjunction with the accompanying drawings
The present invention is further detailed explanation to execute mode.
As it is shown in figure 1, a kind of based on multilevel branch structure the power splitter provided for the embodiment of the present invention, including: 1 is defeated
Inbound port and N number of output port, 2N-2 transmission lines, described input port is connected with described output port by multilevel hierarchy,
The every first nodes of described multilevel hierarchy, connects even higher level of node by 1 described transmission line, is connected by 2 described transmission lines
2 nodes of next stage.
Wherein, the identical length of described 2N-2 transmission lines with, and equal to working frequency range center frequency wavelength four/
One.
When the characteristic impedance of described transmission line is Z0, the impedance of each transmission line is √ 2*Z0, and isolation resistance impedance is 2*Z0.
Described transmission line is microstrip line, and the dielectric substrate of microstrip line is politef, and dielectric constant is 2.65, and substrate is thick
Degree 0.96mm, conduction band thickness 0.035mm.
The present invention provides a kind of power splitter based on multilevel branch structure, including: 1 input port and N number of output port,
2N-2 transmission lines, described input port is connected with described output port by multilevel hierarchy, and the every one-level of described multilevel hierarchy saves
Point, connects even higher level of node by 1 described transmission line, is connected 2 nodes of next stage by 2 described transmission lines.Pass through
The mode of multi-stage cascade, is allocated power signal, simple in construction, and isolation performance is good, and output is big.
The embodiment of the present invention additionally provides the method for designing of a kind of power splitter based on multilevel branch structure, uses multistage knot
1 input port is divided into N number of output port by structure, every first nodes in multilevel hierarchy, connects upper one by 1 described transmission line
Level node, connects 2 nodes of next stage by 2 described transmission lines, and design procedure includes:
Step a: determine the working frequency range of power splitter；
Step b: according to characteristic impedance, dielectric constant, calculate flakiness ratio w/d of transmission line；
Step c: determine length of transmission line and isolation resistance impedance.
Wherein, step b specifically may include that
When w/d is more than 2, w/d is equal to
When w/d is less than or equal to 2, w/d is equal to
Wherein, ε r is dielectric constant,
Step c specifically may include that
Determine that the length of transmission line is equal to 1/4th of working frequency range center frequency wavelength；
The impedance determining each transmission line is √ 2*Z0, and isolation resistance impedance is 2*Z0.
Being described in detail the present invention above, specific case used herein is to the principle of the present invention and embodiment party
Formula is set forth, and the explanation of above example is only intended to help to understand method and the core concept thereof of the present invention；Meanwhile, right
In one of ordinary skill in the art, according to the thought of the present invention, the most all can change
Part, in sum, this specification content should not be construed as limitation of the present invention.
Claims (7)
1. a power splitter based on multilevel branch structure, it is characterised in that including: 1 input port and N number of output port,
2N-2 transmission lines, described input port is connected with described output port by multilevel hierarchy, and the every one-level of described multilevel hierarchy saves
Point, connects even higher level of node by 1 described transmission line, is connected 2 nodes of next stage by 2 described transmission lines.
Power splitter based on multilevel branch structure the most according to claim 1, it is characterised in that described 2N-2 transmission lines
Identical length with, and equal to working frequency range center frequency wavelength 1/4th.
Power splitter based on multilevel branch structure the most according to claim 1, it is characterised in that the characteristic of described transmission line
When impedance is Z0, the impedance of each transmission line is, isolation resistance impedance is 2*Z0.
4. according to the power splitter based on multilevel branch structure of any one described in claims 1 to 3, it is characterised in that described
Transmission line is microstrip line, and the dielectric substrate of microstrip line is politef, and dielectric constant is 2.65, and substrate thickness 0.96mm is led
Tape thickness 0.035mm.
5. the method for designing of a power splitter based on multilevel branch structure, it is characterised in that use multilevel hierarchy by 1 input
Port is divided into N number of output port, every first nodes in multilevel hierarchy, connects even higher level of node by 1 described transmission line, passes through
Article 2, described transmission line connects 2 nodes of next stage, and design procedure includes:
Step a: determine the working frequency range of power splitter；
Step b: according to characteristic impedance, dielectric constant, calculate flakiness ratio w/d of transmission line；
Step c: determine length of transmission line and isolation resistance impedance.
The method for designing of power splitter based on multilevel branch structure the most according to claim 5, it is characterised in that described
According to characteristic impedance, dielectric constant, calculate flakiness ratio w/d of transmission line, including:
When w/d is more than 2, w/d is equal to
When w/d is less than or equal to 2, w/d is equal to
Wherein, ε r is dielectric constant,
The method for designing of power splitter based on multilevel branch structure the most according to claim 5, it is characterised in that described really
Determine length of transmission line and isolation resistance impedance, including:
Determine that the length of transmission line is equal to 1/4th of working frequency range center frequency wavelength；
The impedance determining each transmission line is √ 2*Z0, and isolation resistance impedance is 2*Z0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610372626.4A CN105977599A (en) | 2016-05-30 | 2016-05-30 | Power divider based on multistage branch structure and design method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610372626.4A CN105977599A (en) | 2016-05-30 | 2016-05-30 | Power divider based on multistage branch structure and design method thereof |
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| CN105977599A true CN105977599A (en) | 2016-09-28 |
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| CN201610372626.4A Pending CN105977599A (en) | 2016-05-30 | 2016-05-30 | Power divider based on multistage branch structure and design method thereof |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102956948A (en) * | 2011-08-29 | 2013-03-06 | 黄森 | Novel ultra wide band Wilkinson power divider |
| CN105226365A (en) * | 2015-10-20 | 2016-01-06 | 成都威频通讯技术有限公司 | A kind of 16 points of power splitter Miniaturization Designs |
-
2016
- 2016-05-30 CN CN201610372626.4A patent/CN105977599A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102956948A (en) * | 2011-08-29 | 2013-03-06 | 黄森 | Novel ultra wide band Wilkinson power divider |
| CN105226365A (en) * | 2015-10-20 | 2016-01-06 | 成都威频通讯技术有限公司 | A kind of 16 points of power splitter Miniaturization Designs |
Non-Patent Citations (1)
| Title |
|---|
| DAVID M.POZAR: "《微波工程（第三版）》", 30 June 2015 * |
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Application publication date: 20160928 |