CN100583549C - Filter - Google Patents
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- CN100583549C CN100583549C CN200610061856A CN200610061856A CN100583549C CN 100583549 C CN100583549 C CN 100583549C CN 200610061856 A CN200610061856 A CN 200610061856A CN 200610061856 A CN200610061856 A CN 200610061856A CN 100583549 C CN100583549 C CN 100583549C
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Abstract
A filter comprises an input terminal, an output terminal, a high impedance transmission part and a low impedance transmission part. The input terminal is used for feeding-in an electromagnetic wave signal and the output terminal is used for feeding-out the electromagnetic wave signal. The high impedance transmission part comprises a first high impedance transmission part, a second high impedance transmission part, a third high impedance transmission part, a first connection part and a second connection part. The first connection part is electrically connected with the first high impedance transmission part and the second high impedance transmission part, the second connection part is electrically connected with the second high impedance transmission part and a third high impedance transmission part and the second connection part also comprises a pair of protruding parts. The filter provided by the invention utilizes a plurality of high impedance transmission lines to form the high impedance transmission part in a serpentine way, thus enhancing the coupling between the high impedance transmission part and the low impedance transmission part and causing the transmission zeros to more close with cutoff frequency while reducing the area of the filter, and meanwhile the filter has low loss value within the pass-band frequency.
Description
Technical field
The present invention relates to a kind of filter, refer to a kind of printing filter especially.
Background technology
Filter is as the indispensable high frequency assembly in the mobile communication product, and its major function is to be used for crossover frequency,, blocks the signal of other frequencies by the signal of some frequencies that is.Desirable filter characteristic should be passband undamped and in cut-off frequency decay infinitely great, the saltus step of passband and cut-off frequency should be precipitous as much as possible, promptly should be close as much as possible between transmission zero and the cut-off frequency.Yet, most low pass filters realize between transmission zero and the cut-off frequency close in, the also corresponding increase of interior insertion loss, and can't realize that the two takes into account.
Summary of the invention
In view of this, need provide a kind of filter, can make transmission zero, have less interior insertion loss simultaneously near cut-off frequency.
A kind of filter comprises input, output, high impedance transport part and Low ESR transport part.Input is used for the feed-in electromagnetic wave signal.Output is used to feed out electromagnetic wave signal.The high impedance transport part electrically connects with described input and described output respectively, comprises the first high impedance transport part, the second high impedance transport part, the 3rd high impedance transport part, first connecting portion and second connecting portion.Wherein, the first high impedance transport part, the all rectangular ring-type in the second high impedance transport part and the 3rd high impedance transport part, first connecting portion electrically connects the first high impedance transport part and the second high impedance transport part, second connecting portion electrically connects the second high impedance transport part and the 3rd high impedance transport part, wherein, the described first high impedance transport part comprises first high-impedance transmission line, a pair of second high-impedance transmission line that is parallel to each other and two three high-impedance transmission line parallel with described first high-impedance transmission line, described first connecting portion comprises a pair of high-impedance transmission line that is parallel to each other, the described second high impedance transport part comprises a pair of the 4th high-impedance transmission line, the 5th high-impedance transmission line, and a pair of the 6th high-impedance transmission line, described the 4th high-impedance transmission line is all vertical with described the 5th high-impedance transmission line, and one of them the 4th high-impedance transmission line and described the 5th high-impedance transmission line electrically connect, the size of described the 6th high-impedance transmission line, shape is all identical with described the 4th high-impedance transmission line.Low ESR transport part and the described second high impedance transport part electrically connect, and comprise a pair of protuberance.
The filter that embodiment of the present invention provided, utilize a plurality of high-impedance transmission line to wriggle and form high impedance transport part structure, strengthened the coupling between the high Low ESR transport part, make filter more close cut-off frequency of transmission zero when reducing area, simultaneously, in the passband frequency range, has lower loss value.
Description of drawings
Fig. 1 is the structural representation of embodiment of the present invention median filter.
Fig. 2 is the resolution chart of invention execution mode median filter.
Embodiment
See also Fig. 1, be depicted as the structural representation of embodiment of the present invention median filter 10.
High impedance transport part 140 comprises the first high impedance transport part 142, the second high impedance transport part 144, the 3rd high impedance transport part 146, first connecting portion 143 and second connecting portion 145.In the present embodiment, the first high impedance transport part 142, all rectangular ring-type in the second high impedance transport part 144 and the 3rd high impedance transport part 146.
The first high impedance transport part 142 comprises first high-impedance transmission line 1421, a pair of second high-impedance transmission line 1423 that is parallel to each other and a pair of the 3rd high-impedance transmission line 1425.
First high-impedance transmission line 1421 electrically connects with input 100, and perpendicular to input 100.The two ends of first high-impedance transmission line 1421 connect an end of two second high-impedance transmission line 1423 respectively, and first high-impedance transmission line 1421 is perpendicular to second high-impedance transmission line 1423.The other end of two second high-impedance transmission line 1423 connects an end of two the 3rd high-impedance transmission line 1425 respectively.The 3rd high-impedance transmission line 1425 is parallel with first high-impedance transmission line 1421, and perpendicular to second high-impedance transmission line 1423.
In the present embodiment, the width of the high-impedance transmission line that the first high impedance transport part 142 is all is about 0.2 millimeter, the length of first high-impedance transmission line 1421 is about 2 millimeters, the length of second high-impedance transmission line 1423 is about 0.8 millimeter, and the length of the 3rd high-impedance transmission line 1425 is about 0.9 millimeter.In other execution mode, the length of two the 3rd high-impedance transmission line 1425 also can be different.
First connecting portion 143 comprises a pair of first connecting line 1431 that is parallel to each other.One end of two first connecting lines 1431 connects the other end of two the 3rd high-impedance transmission line 1425 respectively.In the present embodiment, the width of described first connecting line 1431 all is about 0.2 millimeter, and length is about 0.6 millimeter.
The second high impedance transport part 144 comprises a pair of the 4th high-impedance transmission line 1441, the 5th high-impedance transmission line 1443 and a pair of the 6th high-impedance transmission line 1445.One end of two the 4th high-impedance transmission line 1441 is connected with the other end of two first connecting lines 1431 respectively.One end of the 5th high-impedance transmission line 1443 is connected with the other end of one the 4th high-impedance transmission line 1441.The 5th high-impedance transmission line 1443 is vertical with the 4th high-impedance transmission line 1441.The other end of another the 4th high-impedance transmission line 1441 and Low ESR transport part 160 electrically connect.The 6th high-impedance transmission line 1445 and the 4th high-impedance transmission line 1441 shapes, size and all identical with the annexation of the 5th high-impedance transmission line 1443.
In the present embodiment, the width of the 4th high resistant transmission line 1441, the 5th high-impedance transmission line 1443 and the 6th high-impedance transmission line 1445 all is about 0.2 millimeter, wherein the length of the 5th high-impedance transmission line 1443 is about 1 millimeter, and the length of two the 4th high-impedance transmission line 1441 all is about 1.2 millimeters.In other execution mode, the length of two the 4th high-impedance transmission line 1441 also can be different.
Second connecting portion 145 is identical with the structure of first connecting portion 143, and is distributed in the both sides of the second high impedance transport part 144.The annexation that second connecting portion 145 connects the second high impedance transport part 144 is also identical with the annexation that first connecting portion 143 connects the second high impedance transport part 144.
The 3rd high impedance transport part 146 is identical with the structure of the first high impedance transport part 142, and is distributed in the both sides of the second high impedance transport part 144.The annexation that the 3rd high impedance transport part 146 connects second connecting portion 145 is also identical with the annexation that the first high impedance transport part 142 connects first connecting portion 143.
Low ESR transport part 160 comprises the first Low ESR transport part 1601 and the second Low ESR transport part 1602.In the present embodiment, the first Low ESR transport part 1601 is identical with the structure of the second Low ESR transport part 1602.The first Low ESR transport part 1601 is connected with one the 4th high-impedance transmission line 1441, and the second Low ESR transport part 1602 is connected with one the 6th high-impedance transmission line 1445.In the present embodiment, Low ESR transport part 1601 comprises Low ESR transmission line 1603 and protuberance 1605, and protuberance 1605 is stretched out by Low ESR transmission line 1603, also is rectangle, and protuberance 1605 is parallel with the 6th high-impedance transmission line 1445.
The length of Low ESR transmission line 1603 is about 2.9 millimeters, and width is about 1.8 millimeters, and the length of protuberance 1605 is about 0.6 millimeter, and width is about 0.2 millimeter.
See also Fig. 2, be depicted as resolution chart through electromagnetical analogies gained embodiment of the present invention median filter 10.Transverse axis is represented the frequency (unit: GHz) by the signal of filter 10 among the figure, the longitudinal axis represents that (identical element: dB), the quadrant district comprises the amplitude of the scattering parameter (S-parameter:S11) of the amplitude of scattering parameter (S-parameter:S21) of transmission and reflection to amplitude.The scattering parameter of transmission (S21) represents that its corresponding mathematical function is: power output/input power (dB)=20 * Log|S21| by the relation between the power output of the input power of the signal of filter 10 and signal.In the signals transmission of filter 10, the part power of signal is reflected back toward signal source.The power that is reflected back toward signal source is called reflection power.Relation between the input power of the signal by filter 10 and the reflection power of signal, its corresponding mathematical function is: reflection power/incident power (dB)=20 * Log|S11|.
As shown in Figure 2, the filter in the embodiment of the present invention 10 has good filtering usefulness.From curve | S21| can be observed, and form steep " transition slope " between passband frequency range and decay frequency range, and the insertion loss of the signal in passband frequency range is less.Simultaneously from curve | S11| can be observed, and the signal reflex loss absolute value in the passband frequency range is greater than 10dB, and outside the passband frequency range, then signal reflex loss absolute value is less than 10dB.
The filter 10 that embodiment of the present invention provided, utilize a plurality of high-impedance transmission line to form the structure of the high impedance transport part 140 of symmetry, strengthened the coupling between the high Low ESR transport part, make filter 10 more close cut-off frequency of transmission zero when reducing area, simultaneously, in the passband frequency range, has lower loss value.
Claims (10)
1. a filter is characterized in that, comprising:
Input is used for the feed-in electromagnetic wave signal;
Output is used to feed out electromagnetic wave signal;
The high impedance transport part, electrically connect with described input and described output respectively, comprise the first high impedance transport part, the second high impedance transport part, the 3rd high impedance transport part, first connecting portion, and second connecting portion, wherein, the described first high impedance transport part, the all rectangular ring-type in described second high impedance transport part and described the 3rd high impedance transport part, described first connecting portion electrically connects described first high impedance transport part and the described second high impedance transport part, described second connecting portion electrically connects described second high impedance transport part and described the 3rd high impedance transport part, wherein, the described first high impedance transport part comprises first high-impedance transmission line, a pair of second high-impedance transmission line that is parallel to each other and two three high-impedance transmission line parallel with described first high-impedance transmission line, described first connecting portion comprises a pair of high-impedance transmission line that is parallel to each other, the described second high impedance transport part comprises a pair of the 4th high-impedance transmission line, the 5th high-impedance transmission line, and a pair of the 6th high-impedance transmission line, described the 4th high-impedance transmission line is all vertical with described the 5th high-impedance transmission line, and one of them the 4th high-impedance transmission line and described the 5th high-impedance transmission line electrically connect, the size of described the 6th high-impedance transmission line, shape is all identical with described the 4th high-impedance transmission line; And
The Low ESR transport part electrically connects with the described second high impedance transport part, comprises a pair of protuberance.
2. filter as claimed in claim 1 is characterized in that, the two ends of described first high-impedance transmission line electrically connect an end of a pair of second high-impedance transmission line respectively.
3. filter as claimed in claim 2 is characterized in that, described first high-impedance transmission line is perpendicular to described second high-impedance transmission line.
4. filter as claimed in claim 3 is characterized in that an end of described the 3rd high-impedance transmission line connects the other end of described second high-impedance transmission line respectively.
5. filter as claimed in claim 1, it is characterized in that, described second connecting portion is identical with the described first connecting portion structure, be distributed in the both sides of the described second high impedance transport part, and described second connecting portion to connect the annexation of the described second high impedance transport part also identical with the annexation that described first connecting portion connects the described second high impedance transport part.
6. filter as claimed in claim 1 is characterized in that, described the 3rd high impedance transport part is identical with the structure of the described first high impedance transport part, and is distributed in the both sides of the described second high impedance transport part.
7. filter as claimed in claim 1 is characterized in that, described output is identical with described input end structure.
8. filter as claimed in claim 1 is characterized in that, described Low ESR transport part more comprises the first Low ESR transport part and the second Low ESR transport part, and the described first Low ESR transport part is identical with the structure of the described second Low ESR transport part.
9. filter as claimed in claim 8 is characterized in that, the described first Low ESR transport part comprises Low ESR transmission line and protuberance, and described protuberance is stretched out by described Low ESR transmission line and forms.
10. filter as claimed in claim 9 is characterized in that, described protuberance is the protuberance of rectangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610061856A CN100583549C (en) | 2006-07-28 | 2006-07-28 | Filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610061856A CN100583549C (en) | 2006-07-28 | 2006-07-28 | Filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101114726A CN101114726A (en) | 2008-01-30 |
| CN100583549C true CN100583549C (en) | 2010-01-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610061856A Active CN100583549C (en) | 2006-07-28 | 2006-07-28 | Filter |
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| CN (1) | CN100583549C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101533938B (en) * | 2008-03-14 | 2012-06-20 | 鸿富锦精密工业（深圳）有限公司 | Low-pass filter |
| CN104022319B (en) * | 2014-05-10 | 2016-04-13 | 中国计量学院 | There is the tunable low pass filter of Wide stop bands function |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060082424A1 (en) * | 2004-10-19 | 2006-04-20 | Alpha Networks Inc. | Harmonic spurious signal suppression filter |
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2006
- 2006-07-28 CN CN200610061856A patent/CN100583549C/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060082424A1 (en) * | 2004-10-19 | 2006-04-20 | Alpha Networks Inc. | Harmonic spurious signal suppression filter |
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| Publication number | Publication date |
|---|---|
| CN101114726A (en) | 2008-01-30 |
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Address after: No. 2, East Ring 2nd Road, Longhua Street, Longhua District, Shenzhen City, Guangdong Province Patentee after: Foxconn Technology Group Co.,Ltd. Patentee after: HON HAI PRECISION INDUSTRY Co.,Ltd. Address before: 518109, No. two, No. tenth, East Ring Road, Pinus tabulaeformis Industrial Zone, Longhua Town, Baoan District, Guangdong, Shenzhen, 2 Patentee before: HONG FU JIN PRECISION INDUSTRY (SHENZHEN) Co.,Ltd. Patentee before: HON HAI PRECISION INDUSTRY Co.,Ltd. |
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Effective date of registration: 20230803 Address after: 03-05, Gemdale building, 54 Jen Ding lane, Singapore Patentee after: Singapore Shanghong Yunke Co.,Ltd. Address before: 518109 No. 2, East Ring 2nd Road, Longhua Street, Longhua District, Shenzhen City, Guangdong Province Patentee before: Foxconn Technology Group Co.,Ltd. Patentee before: HON HAI PRECISION INDUSTRY Co.,Ltd. |