CN1731621A - Microwave trap based on left-right-hand composite transmission line - Google Patents
Microwave trap based on left-right-hand composite transmission line Download PDFInfo
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- CN1731621A CN1731621A CN 200510050431 CN200510050431A CN1731621A CN 1731621 A CN1731621 A CN 1731621A CN 200510050431 CN200510050431 CN 200510050431 CN 200510050431 A CN200510050431 A CN 200510050431A CN 1731621 A CN1731621 A CN 1731621A
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- transmission line
- composite transmission
- hand composite
- microwave trap
- handed
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 30
- 239000002131 composite material Substances 0.000 title claims description 27
- 239000000463 material Substances 0.000 claims abstract description 33
- 239000003990 capacitor Substances 0.000 claims abstract description 16
- 238000004891 communication Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 230000001413 cellular effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The invention discloses a microwave trap that bases on left-right hand combined transmission lines. It comprises a plurality of left-right hand combined transmission line units: left hand material capacitor CL; right hand material inductor LR; left hand material inductor LL and right hand material capacitor CR. CL is parallel connected with LR and series connected with LL and CR. And then decide the number of left-right hand combined transmission line units according to the trap depth. The invention has the advantages of low bandwidth loss, high trap bandwidth and depth.
Description
Technical field
The present invention relates to a kind of microwave trap based on left-right-hand composite transmission line.
Background technology
Microwave trap is widely used in microwave communication, satellite communication, radio communication, cable TV, the electronic countermeasures, removes unwanted frequency.
At present, the right-handed material structure that known microwave trap normally is made up of capacitor C, inductance L, but existing microwave trap shortcoming is that pass-band loss is big, stopband edge is slowly fallen, notch-width is narrow and notch depth is big inadequately, can not well satisfy the needs of microwave communication, satellite communication, radio communication, cable TV, electronic countermeasures.
In order to enlarge the narrow and raising notch depth of notch-width, many scholars have proposed certain methods, as: adopt the ceramic trapper structure, but whole trapper manufacture difficulty increases, and trapper-the 20dB notch-width is 300kHz, notch-width does not improve; Employing has the LC right-handed material trapper structure of resonator, but (as this notch depth with LC right-handed material trapper of resonator is 15dB still can't to overcome the narrow limitation of notch-width,-3dB notch-width is 600kHz), increase whole trapper manufacture difficulty and cost of manufacture again.
Summary of the invention
The deficiency that the objective of the invention is slow to fall in order to overcome existing microwave trap stopband edge, notch-width is little provides a kind of microwave trap based on left-right-hand composite transmission line.
The objective of the invention is to realize by following proposal:
It has a plurality of left-right-hand composite transmission lines unit, and the left-right-hand composite transmission line unit is: the left-handed materials capacitor C
L, the right-handed material inductance L
RAnd connect the back with the left-handed materials inductance L
L, the right-handed material capacitor C
RBe connected in series, determine the number of left-right-hand composite transmission line unit then according to needed notch depth.
The present invention has low bandpass loss, big notch bandwidth, high notch depth; Cost is low, small-sized simultaneously, is convenient to make and integrated novel microwave trapper.
Description of drawings
Fig. 1 is a left-right-hand composite transmission line cellular construction schematic diagram of the present invention;
Fig. 2 is a left-right-hand composite transmission line of the present invention unit dispersion curve;
Fig. 3 is the trapper S that 20,40,60 left-right-hand composite transmission line unit of the present invention are formed
21The performance schematic diagram.
Embodiment
Left-right-hand composite transmission line of the present invention unit is 20～60.The left-handed materials capacitor C
L=0.0015pF～1.593nF.The right-handed material inductance L
R=0.0192nH～0.9945 μ H.The left-handed materials inductance L
L=1.988 μ H～1.989 μ H.The right-handed material capacitor C
R=0.00519pF～0.0161pF.
As shown in Figure 1, in the left-right-hand composite transmission line unit: C
R, C
LBe electric capacity, L
R, L
LBe inductance.L
RWith C
RForm right-handed material, L
LWith C
LForm left-handed materials.The left-handed materials capacitor C
L, the right-handed material inductance L
RAnd connect the back with the left-handed materials inductance L
L, the right-handed material capacitor C
RSerial connection has been formed the left-right-hand composite transmission line unit.Signal is imported by port one, by port 2 outputs.Obtain required microwave trap performance index by selecting increase and decrease left-right-hand composite transmission line number of unit to connect.
Obtain left-right-hand composite transmission line dispersion curve as described in Figure 2 according to the required frequency of removing that falls into, thereby obtain the pairing capacitor C in left-right-hand composite transmission line unit
R, C
LAnd inductance L
R, L
LNumerical value, i.e. left-handed materials capacitor C
L=1.593nF, the right-handed material inductance L
R=0.0192nH, the left-handed materials inductance L
L=1.988 μ H, the right-handed material capacitor C
R=0.0161pF.Carry out the microwave trap of 20,40,60 left-right-hand composite transmission line cell design at last respectively, obtain as shown in Figure 3 microwave trap performance based on left-right-hand composite transmission line.
Claims (6)
1. the microwave trap based on left-right-hand composite transmission line is characterized in that, it has a plurality of left-right-hand composite transmission lines unit, and the left-right-hand composite transmission line unit is: the left-handed materials capacitor C
L, the right-handed material inductance L
RAnd connect the back with the left-handed materials inductance L
L, the right-handed material capacitor C
RSerial connection.
2. a kind of microwave trap based on left-right-hand composite transmission line according to claim 1 is characterized in that, described a plurality of left-right-hand composite transmission lines unit is 20～60.
3. a kind of microwave trap based on left-right-hand composite transmission line according to claim 1 is characterized in that, described left-handed materials capacitor C
L=0.0015pF～1.593nF.
4. a kind of microwave trap based on left-right-hand composite transmission line according to claim 1 is characterized in that, described right-handed material inductance L
R=0.0192nH～0.9945 μ H.
5. a kind of microwave trap based on left-right-hand composite transmission line according to claim 1 is characterized in that, described left-handed materials inductance L
L=1.988 μ H～1.989 μ H.
6. a kind of microwave trap based on left-right-hand composite transmission line according to claim 1 is characterized in that, described right-handed material capacitor C
R=0.00519pF～0.0161pF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510050431XA CN100490245C (en) | 2005-06-24 | 2005-06-24 | Microwave trap based on left-right-hand composite transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510050431XA CN100490245C (en) | 2005-06-24 | 2005-06-24 | Microwave trap based on left-right-hand composite transmission line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1731621A true CN1731621A (en) | 2006-02-08 |
| CN100490245C CN100490245C (en) | 2009-05-20 |
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ID=35963939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200510050431XA Expired - Fee Related CN100490245C (en) | 2005-06-24 | 2005-06-24 | Microwave trap based on left-right-hand composite transmission line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100490245C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101022182B (en) * | 2007-03-20 | 2010-04-07 | 浙江大学 | Wide band balun based on left-right-hand composite transmitting line |
-
2005
- 2005-06-24 CN CNB200510050431XA patent/CN100490245C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101022182B (en) * | 2007-03-20 | 2010-04-07 | 浙江大学 | Wide band balun based on left-right-hand composite transmitting line |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100490245C (en) | 2009-05-20 |
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| C14 | Grant of patent or utility model | ||
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090520 Termination date: 20110624 |