CN103684320A - Filter used for wireless transmission - Google Patents
Filter used for wireless transmission Download PDFInfo
- Publication number
- CN103684320A CN103684320A CN201310612417.9A CN201310612417A CN103684320A CN 103684320 A CN103684320 A CN 103684320A CN 201310612417 A CN201310612417 A CN 201310612417A CN 103684320 A CN103684320 A CN 103684320A
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- Prior art keywords
- capacitor
- inductance
- wireless transmission
- filter
- antenna
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Abstract
The invention discloses a filter used for wireless transmission. The filter comprises a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, an inductor L1, an inductor L2 and an antenna RF, the capacitor C1, the inductor L1, the capacitor C3 and the capacitor C2 are sequentially connected serially, common ends of the inductor L1 and the capacitor C3 are connected with the capacitor C5 which is connected with the antenna RF, common ends of the capacitor C1 and the inductor L1 are connected with the capacitor C4, common ends of the capacitor C2 and the capacitor C3 are connected with the inductor L2, and the capacitor C4, the capacitor C5, the inductor L2 and the antenna RF are grounded. By the above principle, coordination of high-capacity filter compensation and fine adjustment can be realized well, and the filter is better in filtering effect.
Description
Technical field
The present invention relates to field of wireless transmission, be specifically related to the filter for wireless transmission.
Background technology
Growing along with wireless technology, Radio Transmission Technology application is more and more accepted by all trades and professions.Wireless image transmission is also had an optimistic view of by users gradually as a Special use mode.The characteristics such as it is easy for installation, flexibility is strong, cost performance is high make the supervisory control system of conglomerate more adopt wireless transmission method, set up the connection between monitored Dian He Surveillance center.Wireless monitoring technology modern transportation, transportation, water conservancy, shipping, railway, public security, fire-fighting, Frontier Defence Inspection Station, forest fire protection, park, scenic spot, plant area, community, etc. field be widely used.In wireless transmission, need to use wireless antenna, antenna receiving signal, we need to carry out filtering to the signal receiving, selectively receive, the existing filter circuit carrying out for antenna all exists filtering undesirable, the coordination cooperation simultaneously realizing to large capacity filtering compensation and between finely tuning is not in place, causes filter effect not good.
Summary of the invention
The present invention has overcome the deficiencies in the prior art, is provided for the filter of wireless transmission, and large capacity filtering compensation and fine setting all can good cooperation be realized, and filter effect is better.
For solving above-mentioned technical problem, the present invention is by the following technical solutions: for the filter of wireless transmission, comprise capacitor C 1, capacitor C 2, capacitor C 3, capacitor C 4, capacitor C 5, inductance L 1, inductance L 2 and antenna RF, described capacitor C 1, inductance L 1, capacitor C 3 and capacitor C 2 are connected in series successively; Described inductance L 1 is connected capacitor C 5 with the common port of capacitor C 3, and capacitor C 5 connects antenna RF simultaneously; Described capacitor C 1 is connected capacitor C 4 with the common port of inductance L 1; Described capacitor C 2 is connected inductance L 2 with the common port of capacitor C 3; Capacitor C 4, capacitor C 5, inductance L 2 and the equal ground connection of antenna RF.
Preferably, one end of described capacitor C 1 and capacitor C 2 is also connected respectively different inputs.
Preferably, the equal and opposite in direction of described capacitor C 1 and capacitor C 2.
Preferably, described capacitor C 3 and capacitor C 4 equal and opposite in directions.
Preferably, the size of described capacitor C 3 is big or small twices of capacitor C 5.
Preferably, the size of described inductance L 1 and the equal and opposite in direction of inductance L 2.
Compared with prior art, the invention has the beneficial effects as follows: the present invention accesses inductance L 2 between capacitor C 2 and capacitor C 3 common ports, between capacitor C 1 and the common port of inductance L 1, access capacitor C 4, realization, to the best cooperation between large capacity filtering compensation and fine setting, reaches the best filtering to antenna receiving signal.
Accompanying drawing explanation
Fig. 1 is circuit diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further elaborated, and embodiments of the invention are not limited to this.
Embodiment:
As shown in 1 figure, the present invention includes capacitor C 1, capacitor C 2, capacitor C 3, capacitor C 4, capacitor C 5, inductance L 1, inductance L 2 and antenna RF, one end of capacitor C 1 and capacitor C 2 is also connected respectively different inputs, the equal and opposite in direction of capacitor C 1 and capacitor C 2, capacitor C 3 and capacitor C 4 equal and opposite in directions, the size of capacitor C 3 is big or small twices of capacitor C 5, the equal and opposite in direction of the size of inductance L 1 and inductance L 2.The capacitor C 1 of the present embodiment, inductance L 1, capacitor C 3 and capacitor C 2 are connected in series successively.The inductance L 1 of the present embodiment is connected capacitor C 5 with the common port of capacitor C 3, and capacitor C 5 connects antenna RF simultaneously; The common port of capacitor C 1 and inductance L 1 is connected capacitor C 4.The capacitor C 2 of the present embodiment is connected inductance L 2 with the common port of capacitor C 3; Capacitor C 4, capacitor C 5, inductance L 2 and the equal ground connection of antenna RF.
Between capacitor C 2 and capacitor C 3 common ports, access inductance L 2, between capacitor C 1 and the common port of inductance L 1, access capacitor C 4, between inductance L 1 and capacitor C 3 common ports and antenna, also access capacitor C 5, realization, to the best cooperation between large capacity filtering compensation and fine setting, reaches the best filtering to antenna receiving signal.
Just can realize this invention as mentioned above.
Claims (6)
1. for the filter of wireless transmission, it is characterized in that: comprise capacitor C 1, capacitor C 2, capacitor C 3, capacitor C 4, capacitor C 5, inductance L 1, inductance L 2 and antenna RF, described capacitor C 1, inductance L 1, capacitor C 3 and capacitor C 2 are connected in series successively; Described inductance L 1 is connected capacitor C 5 with the common port of capacitor C 3, and capacitor C 5 connects antenna RF simultaneously; Described capacitor C 1 is connected capacitor C 4 with the common port of inductance L 1; Described capacitor C 2 is connected inductance L 2 with the common port of capacitor C 3; Capacitor C 4, capacitor C 5, inductance L 2 and the equal ground connection of antenna RF.
2. the filter for wireless transmission according to claim 1, is characterized in that: described capacitor C 1 is also connected respectively different inputs with one end of capacitor C 2.
3. the filter for wireless transmission according to claim 1, is characterized in that: described capacitor C 1 and the equal and opposite in direction of capacitor C 2.
4. the filter for wireless transmission according to claim 1, is characterized in that: described capacitor C 3 and capacitor C 4 equal and opposite in directions.
5. the filter for wireless transmission according to claim 4, is characterized in that: the size of described capacitor C 3 is big or small twices of capacitor C 5.
6. the filter for wireless transmission according to claim 1, is characterized in that: the size of described inductance L 1 and the equal and opposite in direction of inductance L 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310612417.9A CN103684320A (en) | 2013-11-28 | 2013-11-28 | Filter used for wireless transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310612417.9A CN103684320A (en) | 2013-11-28 | 2013-11-28 | Filter used for wireless transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103684320A true CN103684320A (en) | 2014-03-26 |
Family
ID=50320825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310612417.9A Pending CN103684320A (en) | 2013-11-28 | 2013-11-28 | Filter used for wireless transmission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103684320A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1553585A (en) * | 2003-12-19 | 2004-12-08 | 金宝电子工业股份有限公司 | Radio emitting/receiving circulative communicating circuit |
| CN1582531A (en) * | 2001-11-01 | 2005-02-16 | 皇家飞利浦电子股份有限公司 | Tuneable filter |
| CN102144239A (en) * | 2008-09-02 | 2011-08-03 | 高通股份有限公司 | Bidirectional wireless power transmission |
| US20110235557A1 (en) * | 2008-10-31 | 2011-09-29 | Nortel Networks Limited | Self-matched band reject filter |
-
2013
- 2013-11-28 CN CN201310612417.9A patent/CN103684320A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1582531A (en) * | 2001-11-01 | 2005-02-16 | 皇家飞利浦电子股份有限公司 | Tuneable filter |
| CN1553585A (en) * | 2003-12-19 | 2004-12-08 | 金宝电子工业股份有限公司 | Radio emitting/receiving circulative communicating circuit |
| CN102144239A (en) * | 2008-09-02 | 2011-08-03 | 高通股份有限公司 | Bidirectional wireless power transmission |
| US20110235557A1 (en) * | 2008-10-31 | 2011-09-29 | Nortel Networks Limited | Self-matched band reject filter |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140326 |