CN201749929U - Wilkinson power divider based on left-hand microstrip lines - Google Patents
Wilkinson power divider based on left-hand microstrip lines Download PDFInfo
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- CN201749929U CN201749929U CN2010202404492U CN201020240449U CN201749929U CN 201749929 U CN201749929 U CN 201749929U CN 2010202404492 U CN2010202404492 U CN 2010202404492U CN 201020240449 U CN201020240449 U CN 201020240449U CN 201749929 U CN201749929 U CN 201749929U
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- power divider
- wilkinson power
- hand transmission
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- power splitter
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Abstract
The utility model discloses a Wilkinson power divider based on left-hand microstrip lines, which is characterized in that an input end and an output end are both provided with right-hand transmission lines with the lengths of lambda/8; and a Y branch arm adopts left-hand transmission lines with the lengths of lambda/4, the lambda is a central working wavelength, the left-hand transmission lines are realized by adopting a gathered L-C element, namely that a unit structure comprises a series-connection capacitor CL and a parallel-inductor LL. The Wilkinson power divider has the advantages that the width of an isolated strip is increased by about 50%, which is 1.5 f0; and the size of the power divider is smaller than that of the traditional power divider.
Description
Technical field
The utility model relates to the power splitter in a kind of microwave communication, particularly a kind of Wilkinson power splitter based on left-hand microstrip line.
Background technology
Microwave power distributor is to be used in the microwave circuit input signal power demultiplexing output critical function device, is one of core devices of forming microwave and wireless network.Can be divided into two kinds of simple power splitter and isolation power dividers according to electric circuit characteristic.Usually do not settle isolation resistance between the simple power splitter output, its advantage is more easily to realize the multichannel distribution, can obtain higher input and output isolation at bigger bandwidth range.Because the type power splitter adopts more piece impedance conversion line to come spread bandwidth mostly, its size is bigger usually, is difficult for realizing integrated.And lacking isolation between its output port, performance and application scenario are all limited to.Nineteen sixty, Wilkinson has proposed isolation power divider first, is also referred to as the Wilkinson power splitter, and its advantage is to introduce isolation resistance makes output obtain isolation performance preferably between each port, thereby the scope of application is wider.Its major defect is there is not enough big isolation bandwidth.
Tradition Wilkinson power splitter is introduced isolation resistance R between output port, when an output because of reason generation reflex times such as impedance mismatchings, reflection power arrives by left hand transmission line and two branch roads of isolation resistance between the two paths of signals of another output and exists the π phase difference to cancel out each other, thereby reaches the purpose of isolating output.But, adopt λ/8 right hand transmission lines as a minute support arm, when the bandwidth travel frequency changed, the phase difference of output reflected signal no longer was π but with the frequency change linear deflection.When side-play amount is big, thereby reflection power is no longer cancelled out each other the bandwidth of isolation signals is restricted.
The utility model content
Technical problem to be solved in the utility model is that a kind of isolation bandwidth and little Wilkinson power splitter based on left-hand microstrip line of volume of increasing will be provided.
In order to solve above technical problem, the utility model provides a kind of Wilkinson power splitter based on left-hand microstrip line, and it is characterized in that: input and output are right hand transmission line, and length is λ/8; Its Y divides support arm to adopt left hand transmission line, and length is λ/4, and λ is the central task wavelength, and left hand transmission line adopts general collection L-C element to realize that promptly cellular construction is made of series capacitance CL and shunt inductance LL.
The utility model proposes with the original right hand transmission line of left hand transmission line replacement, when frequency change, the phase difference of reflected signal is less with the non-linear skew of frequency change, therefore effectively reduces the restriction of traditional power splitter to bandwidth.
Superior effect of the present utility model is:
1) traditional Wilkinson power splitter its-the 10dB isolation bandwidth is generally in the scope of f0, it is nearly 50% that the utility model power splitter isolation bandwidth increases, and is 1.5 f0;
2) the utility model power splitter size is littler than traditional power splitter: the Y branch arm length of the utility model power splitter is about 20.4mm, and traditional Wilkinson power splitter uses 1/4 wavelength transmission line, and its length surpasses 40mm.
Description of drawings
Fig. 1 is a functional-block diagram of the present utility model.
Embodiment
See also shown in the accompanying drawing, the utility model will be further described.
As shown in Figure 1, the utility model provides a kind of Wilkinson power splitter based on left-hand microstrip line, and it is characterized in that: input and output are right hand transmission line, and length is λ/8; Its Y divides support arm to adopt left hand transmission line, and length is λ/4, and λ is the central task wavelength, and left hand transmission line adopts general collection L-C element to realize that promptly cellular construction is made of series capacitance CL and shunt inductance LL.
Select the baseplate material of FR4 epoxy resin (dielectric constant 4.4) as the utility model power splitter.Substrate thickness is 1.5mm, and the metallic conductor layer thickness is 0.035mm, and conductivity is 5.88 * 107S/m.In the manufacturing process of device, λ/8 right hand transmission lines all adopt microstrip line to realize, λ/4 left hand transmission lines are then realized by lump L-C element.The microstrip line characteristic impedance is Z0=50 Ω.Central task frequency f=the 0.9GHz of device.According to the homogeneous medium theory, the phase shift β Δ z of single transmission line unit is much smaller than 2 π.When | φ |=pi/2, get β Δ z=π/12.When the transmission line unit is made as N=6, can obtain CL=9.5527pF, LL=47.763nH.
Claims (1)
1. Wilkinson power splitter based on left-hand microstrip line, it is characterized in that: input and output are right hand transmission line, and length is λ/8; Its Y divides support arm to adopt left hand transmission line, and length is λ/4, and λ is the central task wavelength, and left hand transmission line adopts general collection L-C element to realize.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202404492U CN201749929U (en) | 2010-06-29 | 2010-06-29 | Wilkinson power divider based on left-hand microstrip lines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202404492U CN201749929U (en) | 2010-06-29 | 2010-06-29 | Wilkinson power divider based on left-hand microstrip lines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201749929U true CN201749929U (en) | 2011-02-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202404492U Expired - Fee Related CN201749929U (en) | 2010-06-29 | 2010-06-29 | Wilkinson power divider based on left-hand microstrip lines |
Country Status (1)
| Country | Link |
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| CN (1) | CN201749929U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104676670A (en) * | 2014-05-28 | 2015-06-03 | 广东美的厨房电器制造有限公司 | Semiconductor microwave oven and semiconductor microwave source thereof |
-
2010
- 2010-06-29 CN CN2010202404492U patent/CN201749929U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104676670A (en) * | 2014-05-28 | 2015-06-03 | 广东美的厨房电器制造有限公司 | Semiconductor microwave oven and semiconductor microwave source thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110216 Termination date: 20110629 |