CN100530957C - Two-channel band pass filter - Google Patents
Two-channel band pass filter Download PDFInfo
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- CN100530957C CN100530957C CNB2006100339482A CN200610033948A CN100530957C CN 100530957 C CN100530957 C CN 100530957C CN B2006100339482 A CNB2006100339482 A CN B2006100339482A CN 200610033948 A CN200610033948 A CN 200610033948A CN 100530957 C CN100530957 C CN 100530957C
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- connecting portion
- resonator
- pass filter
- band pass
- channel band
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Abstract
Being setup on base plate, the dual channel band-pass filter includes input end, output end, first resonator, and second resonator. The input end is in use for feeding in electromagnetic wave signal; and the output end is in use for feeding out electromagnetic wave signal. The input end and the output end are setup in parallel. Being formed on central portion of the first resonator approximately, first groove is connected to the input end electrically. Being formed on central portion approximately of the second resonator side by side to the first resonator, second groove is connected to the output end electrically. Being workable at adjacent closed two frequency bands, the dual channel band-pass filter possesses good filtering effect.
Description
[technical field]
The present invention relates to a kind of high frequency assembly, relate in particular to a kind of filter.
[background technology]
In recent years, because the market demand of mobile communication product heightens, make that the development of radio communication is more rapid, in numerous wireless communication standards, the most noticeable is that U.S.'s Institute of Electrical and Electronics Engineers is (hereinafter to be referred as IEEE) 802.11 WLAN of Zhi Dinging (Wireless Local AreaNetwork) agreement.This agreement was formulated in 1997, and it not only provides many unprecedented functions on the radio communication, and the solution that provides the wireless communications products that can make various different brands to be communicated with each other.The formulation of this agreement has been opened a new milestone for the radio communication development undoubtedly.
Mobile phone with WiFi (Wireless Fidelity) function, it is fast that the mobile network's that its signaling rate is more traditional transmission speed is wanted, the signaling rate of existing GSM (Global System for MobileCommunications) mobile phone is 9.6Kbps to the maximum, and its signaling rate of mobile phone with WiFi function reaches as high as 54Mbps (IEEE 802.11g).In addition, be the passage of the Internet because WiFi uses, so cost is lower.
Existing telephone manufacturer embeds GSM mobile handset (dual-mode handset) with the WiFi function, and both realizing can be at GSM (working band is 1900MHz) network, again can be in the purpose of WLAN (working band is 2.4GHz) conversation.Because 1900MHz and 2.4GHz are adjacent two very near frequency bands, therefore, when the dual-mode handset desire is used above-mentioned two kinds of communications protocol simultaneously, just require the filter of above-mentioned dual-mode handset can be operated in adjacent two very near frequency bands.Yet existing filter can't satisfy this demand, thereby causes the filtering performance of dual-mode handset not good.
[summary of the invention]
For solving the deficiency that above-mentioned prior art exists, a kind of two-channel band pass filter need be provided, this two-channel band pass filter can be worked under adjacent two very near frequency bands.
A kind of two-channel band pass filter is arranged on the substrate, and this two-channel band pass filter comprises an input, an output, one first resonator, and one second resonator.Input is used for the feed-in electromagnetic wave signal, and output is used to feed out electromagnetic wave signal, and be arranged in parallel with input.First resonator is electrically connected at input, comprise first in addition, with the described first parallel in addition setting and the first identical interior band of length, first connecting portion, and second connecting portion that equates and be parallel to each other with described first connecting portion length and width, band comprises and being arranged in described first in the middle part of the band and towards first protuberance of described first tyre in described first.First band in addition and in first and first connecting portion and second connecting portion be orthogonal to be connected and to form first groove in the centre of first resonator.Second resonator is electrically connected at output, comprise second in addition, with the described second parallel in addition setting and the second identical interior band of length, the 3rd connecting portion, and the 4th connecting portion that equates and be parallel to each other with described the 3rd connecting portion length and width, band comprises and being arranged in described second in the middle part of the band and towards second protuberance of second tyre in described second.Second band in addition and in second and the 3rd connecting portion and the 4th connecting portion be orthogonal to be connected and to form second groove in the centre of second resonator.
Two-channel band pass filter in the embodiment of the present invention, because the trench design of its resonator and being arranged side by side, thereby can under adjacent two very near frequency bands, work.
[description of drawings]
Fig. 1 is the schematic diagram of two-channel band pass filter in the embodiment of the present invention.
Fig. 2 is the application schematic diagram of two-channel band pass filter in the embodiment of the present invention.
Fig. 3 is the resolution chart of two-channel band pass filter in electromagnetical analogies gained embodiment of the present invention.
[embodiment]
See also Fig. 1, be depicted as the schematic diagram of two-channel band pass filter 10 in the embodiment of the present invention.
In the present embodiment, two-channel band pass filter 10 is arranged on the substrate 20, and two-channel band pass filter 10 comprises input 100, output 120, first resonator 140, and second resonator 160.
The 3rd connecting portion 163 and first connecting portion 143 are located along the same line, and the 4th connecting portion 164 and second connecting portion 144 are located along the same line.Be with in first and be with 162 adjacent settings in 142 and second.First protuberance 145 towards first in addition 141, the second protuberances 165 towards second in addition 161.
See also Fig. 2, be depicted as the application schematic diagram of two-channel band pass filter 10 in the embodiment of the present invention.
But for making two-channel band pass filter 10 operate as normal in the embodiment of the present invention, the input 100 at two-channel band pass filter 10 electrically connects first transducer 300 respectively, and output 120 electrically connects second transducer 400.First transducer 300 comprises first converter section 302, and second converter section 304.Second transducer 400 comprises the 3rd converter section 402, and the 4th converter section 404.One end of first converter section 302 and input 100 electrically connect, and the other end and second converter section 304 electrically connect.One end of second converter section 304 and first converter section 302 electrically connect, and the other end and radio-frequency module (not shown) electrically connect.One end of the 3rd converter section 402 and output 120 electrically connect, and the other end and the 4th converter section 404 electrically connect.One end of the 4th converter section 404 and the 3rd converter section 402 electrically connect, and the other end and antenna (not shown) electrically connect.
In the present embodiment, for making two-channel band pass filter 10 can work in two frequency bands that centre frequency is 1900MHz and 2.4GHz, the resistance of first converter section 302 and the 3rd converter section 402 is 95 ohm, and the resistance of second converter section 304 and the 4th converter section 404 is 68 ohm.
See also Fig. 3, the resolution chart after being depicted as in electromagnetical analogies gained embodiment of the present invention two-channel band pass filter 10 and first transducer 300 and second transducer 400 being connected.
Transverse axis is represented the frequency (unit: GHz) by the signal of two-channel band pass filter in the embodiment of the present invention 10 among the figure, the longitudinal axis is represented amplitude (unit: dB), comprise the amplitude of the scattering parameter (S-parameter:S11) of the amplitude of scattering parameter (S-parameter:S21) of transmission and reflection.The scattering parameter dB[(S2 of transmission, 1)] expression by the signal of two-channel band pass filter 10 in the embodiment of the present invention input power and the relation between the power output of signal, its corresponding mathematical function is: dB[(S2,1)]=20 * Log|S21|.In the signals transmission of two-channel band pass filter 10, the part power of signal is reflected back toward signal source in embodiment of the present invention.The power that is reflected back toward signal source is called reflection power.Relation between the input power of the signal by two-channel band pass filter in the embodiment of the present invention 10 and the reflection power of signal, its corresponding mathematical function is: dB[(S1,1)]=20 * Log|S11|.
As shown in Figure 3, two-channel band pass filter 10 cooperates first transducer 300 and second transducer 400 not only can work in adjacent two frequency bands (binary channels) in the embodiment of the present invention, and has good binary channels filter effect.From curve dB[(S2,1)] as can be known, form between passband frequency band and attenuation band on steep " transition slope ", and the insertion loss of the signal in passband frequency range is near 0.Simultaneously from curve dB[(S1,1)] can be observed, the signal reflex loss absolute value in passband frequency range is greater than 10, and outside the passband frequency band, signal reflex loss absolute value is less than 10.Show that thus two-channel band pass filter 10 is operated under the adjacent two very near frequency bands and has good filter effect.
The working band of two-channel band pass filter 10 is not limited in 1900MHz and 2.4GHz in the embodiment of the present invention, know those skilled in the art and in by first tyre 141, first that changes first resonator 140, be with the 162, the 3rd connecting portion 163 in second tyre 161, second with 142, first connecting portion 143, second connecting portion 144 and second resonator 160, and the length of the 4th connecting portion 164 and width, can reach the purpose of the working band that changes two-channel band pass filter 10.
Claims (5)
1. a two-channel band pass filter is arranged on the substrate, it is characterized in that described two-channel band pass filter comprises:
Input is used for the feed-in electromagnetic wave signal;
First resonator, be electrically connected at described input, comprise first in addition, with the described first parallel in addition setting and the first identical interior band of length, first connecting portion, reach second connecting portion that equates and be parallel to each other with described first connecting portion length and width, band comprises and is arranged at band middle part in described first and towards described first in addition first protuberance in described first, and described first band in addition and in first and described first connecting portion and second connecting portion be orthogonal to be connected and in the centre of described first resonator formation first groove;
Second resonator, be arranged side by side with described first resonator, comprise second in addition, with the described second parallel in addition setting and the second identical interior band of length, the 3rd connecting portion, reach the 4th connecting portion that equates and be parallel to each other with described the 3rd connecting portion length and width, band comprises and is arranged at band middle part in described second and towards second in addition second protuberance in described second, and described second band in addition and in second and described the 3rd connecting portion and the 4th connecting portion be mutual vertical to be connected and to form second groove in the centre of described second resonator; And
Output is used to feed out electromagnetic wave signal, and described output and described input be arranged in parallel, and is electrically connected at described second resonator.
2. two-channel band pass filter as claimed in claim 1 is characterized in that described first resonator and described second resonator are symmetrical arranged.
3. two-channel band pass filter as claimed in claim 1 is characterized in that the shape of described first resonator is identical with the shape of described second resonator.
4. two-channel band pass filter as claimed in claim 1 is characterized in that described the 3rd connecting portion and first connecting portion are located along the same line, and described the 4th connecting portion and second connecting portion are located along the same line.
5. two-channel band pass filter as claimed in claim 1 is characterized in that being with adjacent setting in the band and described second in described first.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100339482A CN100530957C (en) | 2006-02-24 | 2006-02-24 | Two-channel band pass filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100339482A CN100530957C (en) | 2006-02-24 | 2006-02-24 | Two-channel band pass filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101026372A CN101026372A (en) | 2007-08-29 |
| CN100530957C true CN100530957C (en) | 2009-08-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100339482A Expired - Fee Related CN100530957C (en) | 2006-02-24 | 2006-02-24 | Two-channel band pass filter |
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| Country | Link |
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| CN (1) | CN100530957C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10805015B1 (en) | 2020-02-21 | 2020-10-13 | Rohde & Schwarz Gmbh & Co. Kg | Method as well as test system for testing a device under test |
| CN111628256B (en) * | 2020-06-01 | 2021-10-22 | 中天宽带技术有限公司 | High-selectivity dual-passband filter |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1507108A (en) * | 2002-12-13 | 2004-06-23 | 清华大学 | Long microstrip resonator and its microwave filter |
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2006
- 2006-02-24 CN CNB2006100339482A patent/CN100530957C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1507108A (en) * | 2002-12-13 | 2004-06-23 | 清华大学 | Long microstrip resonator and its microwave filter |
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| CN101026372A (en) | 2007-08-29 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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: 20090819 Termination date: 20130224 |