CN214626935U - Triple broadband filter - Google Patents
Triple broadband filter Download PDFInfo
- Publication number
- CN214626935U CN214626935U CN202120142365.3U CN202120142365U CN214626935U CN 214626935 U CN214626935 U CN 214626935U CN 202120142365 U CN202120142365 U CN 202120142365U CN 214626935 U CN214626935 U CN 214626935U
- Authority
- CN
- China
- Prior art keywords
- capacitor
- filter
- inductor
- electrically connected
- uplink
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Filters And Equalizers (AREA)
Abstract
The utility model discloses a triple broadband filter, its technical scheme main points are: the WI-FI wireless sensor network system comprises an uplink suppression filter, a WI-FI suppression filter and a downlink low-pass filter, wherein the rear end of the uplink suppression filter is electrically connected with the WI-FI suppression filter through a capacitor C10, the rear end of the WI-FI suppression filter is electrically connected with a downlink module, the uplink suppression filter is electrically connected with the downlink low-pass filter, the rear end of the downlink low-pass filter is electrically connected with an uplink module, the uplink suppression filter adopts a four-order high-pass filter, the WI-FI suppression filter adopts a three-order low-pass filter, and the downlink low-pass filter adopts a four-order low-pass filter; by utilizing the triple broadband filter, the cable digital television signal filter has high out-of-band rejection and low in-band insertion loss, can effectively filter various interferences in the cable digital television signal, and realizes the passing of in-band signals of each part of modules and the filtering of out-of-band interference signals.
Description
Technical Field
The utility model relates to a broadband filter field, in particular to triple broadband filter.
Background
The filter is a filter circuit consisting of a capacitor, an inductor and a resistor. The filter can effectively filter the frequency point of the specific frequency in the power line or the frequencies except the frequency point to obtain a power signal of the specific frequency or eliminate the power signal of the specific frequency.
Referring to the prior chinese patent publication No. CN101719577A, a wideband dual-mode filter is disclosed, which includes two input/output structures, at least two rectangular dual-mode resonators located between the two input/output structures, and a coupling structure located between adjacent rectangular dual-mode resonators or between an input/output structure and a rectangular dual-mode resonator, and is characterized in that a metal boss is disposed inside or near at least one coupling structure of the wideband dual-mode filter.
The broadband dual-mode filter has the characteristics of small in-band insertion loss and good out-of-band rejection, solves the problem of narrow bandwidth of the conventional similar filter, has a simple structure, is convenient to process, has low production cost, and can be used in electronic systems of various microwave bands, particularly in the fields of radars, communication, missile guidance and the like. However, the above-mentioned wide-band dual-mode filter still has some disadvantages, such as: high out-of-band rejection and low in-band insertion loss cannot be realized, and various interferences in the cable digital television signal cannot be effectively filtered.
SUMMERY OF THE UTILITY MODEL
To solve the problems mentioned in the background art, the present invention is directed to a triple broadband filter to solve the problems mentioned in the background art.
The above technical purpose of the present invention can be achieved by the following technical solutions:
a triple broadband filter comprises an uplink suppression filter, a WI-FI suppression filter and a downlink low-pass filter, wherein the rear end of the uplink suppression filter is electrically connected with the WI-FI suppression filter through a capacitor C10, the rear end of the WI-FI suppression filter is electrically connected with a downlink module, the uplink suppression filter is electrically connected with the downlink low-pass filter, the rear end of the downlink low-pass filter is electrically connected with the uplink module, the uplink suppression filter adopts a fourth-order high-pass filter, the WI-FI suppression filter adopts a third-order low-pass filter, and the downlink low-pass filter adopts a fourth-order low-pass filter.
By adopting the technical scheme, the uplink suppression filter is a four-order high-pass filter and filters uplink signals of CABLE MODEM, EOC and other modules; the WI-FI suppression filter is a third-order low-pass filter and filters signals such as WI-FI, a mobile phone, MOCA and the like; the uplink suppression filter and the WI-FI suppression filter are connected in series front and back to realize broadband band-pass from the initial frequency of 110MHz to the cutoff frequency of 1000MHz, and signals input by the RF interface are transmitted to the downlink module after being filtered. The downlink low-pass filter is a fourth-order low-pass filter, broadband band-pass within the range from the initial frequency of 5MHz to the cut-off frequency of 65MHz is realized, and the signals filtered by the uplink module are transmitted to the RF interface and return to the wired network. The triple broadband filter has high out-of-band rejection and low in-band insertion loss, can effectively filter various interferences in cable digital television signals, and is suitable for product applications such as intelligent gateways, set top boxes and the like. The low frequency EOC and Cable modem of the gateway product need strong uplink strong signals, and the downlink module of the gateway product needs to receive cleaner RF signals to ensure the high quality of the received signals.
Preferably, one end of the uplink rejection filter and one end of the downlink low-pass filter are electrically connected to a capacitor C1.
Through adopting above-mentioned technical scheme, electric capacity C1 can realize carrying out preliminary filtration stability to the input signal.
Preferably, the uplink suppression filter is sequentially connected in series with an inductor L1, a capacitor C2, a capacitor C4, a capacitor C6 and a capacitor C8, one side of the capacitor C2 of the uplink suppression filter is electrically connected with a capacitor C3 and an inductor L2, one side of the capacitor C4 is electrically connected with an inductor L3 and a capacitor C5, one side of the capacitor C6 is electrically connected with an inductor L4 and a capacitor C7, one side of the capacitor C8 is electrically connected with a capacitor C9 and an inductor L5, and the inductors L2, the capacitor C5, the capacitor C7 and the inductor L5 are electrically grounded.
By adopting the technical scheme, the uplink suppression filter is a four-order high-pass filter and filters uplink signals of modules such as CABLE MODEM, EOC and the like.
Preferably, the WI-FI suppression filter is sequentially connected in series with an inductor L6, an inductor L7, an inductor L8, and an inductor L9, one side of the inductor L6 is electrically connected with a capacitor C11, one side of the inductor L7 is electrically connected with a capacitor C12, one side of the inductor L8 is electrically connected with a capacitor C13, the capacitor C11, the capacitor C12, and the capacitor C13 are respectively electrically grounded, and the downstream low-pass filter includes an inductor L10, an inductor L11, an inductor L12, an inductor L13, an inductor L14, and a capacitor C23, which are sequentially connected in series.
By adopting the technical scheme, the WI-FI suppression filter is a third-order low-pass filter and filters signals such as WI-FI, mobile phones and MOCA.
Preferably, the upper and lower ends of the inductor L11 are respectively connected in parallel with a capacitor C14, a capacitor C15 and a capacitor C16, the upper and lower ends of the inductor L12 are respectively connected in parallel with a capacitor C17, a capacitor C16 and a capacitor C18, the upper and lower ends of the inductor L13 are respectively connected in parallel with a capacitor C19, a capacitor C18 and a capacitor 20, the upper and lower ends of the inductor L14 are respectively connected in parallel with a capacitor C21, a capacitor C20 and a capacitor C22, and the capacitor C15, the capacitor C16, the capacitor C18, the capacitor C20 and the capacitor C22 are respectively electrically grounded.
By adopting the technical scheme, the downlink low-pass filter is a fourth-order low-pass filter, so that broadband band-pass from the initial frequency of 5MHz to the cut-off frequency of 65MHz is realized, and the signal filtered by the downlink low-pass filter is transmitted to the RF interface and returns to the wired network.
To sum up, the utility model discloses mainly have following beneficial effect:
the utility model discloses a triple broadband filter, have high outband suppression, low in-band insertion loss, various interference in can effective filtering cable digital television signal, be applicable to intelligent gateway, product such as STB is used, partial gateway product need be strong going up strong signal, and its down module need receive comparatively clean RF signal, can guarantee received signal's high quality, consequently, use triple broadband filter, can realize passing through and the outband interference signal filtering of the required in-band signal of each part module, intelligent gateway has been improved, product adaptability such as STB, successfully be applied to in the product practice.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1
Referring to fig. 1, a triple broadband filter includes an uplink suppression filter, a WI-FI suppression filter, and a downlink low-pass filter, where a rear end of the uplink suppression filter is electrically connected to the WI-FI suppression filter through a capacitor C10, a rear end of the WI-FI suppression filter is electrically connected to a downlink module, the uplink suppression filter is electrically connected to the downlink low-pass filter, a rear end of the downlink low-pass filter is electrically connected to the uplink module, the uplink suppression filter employs a fourth-order high-pass filter, the WI-FI suppression filter employs a third-order low-pass filter, and the downlink low-pass filter employs a fourth-order low-pass filter.
By adopting the technical scheme, when in use, the uplink suppression filter is a four-order high-pass filter and filters uplink signals of CABLE MODEM, EOC and other modules; the WI-FI suppression filter is a third-order low-pass filter and filters signals such as WI-FI, a mobile phone, MOCA and the like; the uplink suppression filter and the WI-FI suppression filter are connected in series front and back to realize broadband band-pass from the initial frequency of 110MHz to the cutoff frequency of 1000MHz, and signals input by the RF interface are transmitted to the downlink module after being filtered. The downlink low-pass filter is a fourth-order low-pass filter, broadband band-pass within the range from the initial frequency of 5MHz to the cut-off frequency of 65MHz is realized, and the signals filtered by the uplink module are transmitted to the RF interface and return to the wired network. The triple broadband filter has high out-of-band rejection and low in-band insertion loss, can effectively filter various interferences in cable digital television signals, and is suitable for product applications such as intelligent gateways, set top boxes and the like. The low frequency EOC and Cable modem of the gateway product need strong uplink strong signals, and the downlink module of the gateway product needs to receive cleaner RF signals to ensure the high quality of the received signals.
Referring to fig. 1, for the purpose of stably inputting input information, one end of the upstream suppression filter and one end of the downstream low-pass filter are electrically connected to a capacitor C1. The effect is that the capacitor C1 can realize the preliminary filtering stabilization of the input signal.
Referring to fig. 1, in order to achieve the purpose of effectively filtering an uplink signal, an inductor L1, a capacitor C2, a capacitor C4, a capacitor C6, and a capacitor C8 are sequentially connected in series to the uplink suppression filter, a capacitor C3 and an inductor L2 are electrically connected to one side of a capacitor C2 of the uplink suppression filter, an inductor L3 and a capacitor C5 are electrically connected to one side of a capacitor C4, an inductor L4 and a capacitor C7 are electrically connected to one side of a capacitor C6, a capacitor C9 and an inductor L5 are electrically connected to one side of a capacitor C8, and an inductor L2, a capacitor C5, a capacitor C7, and an inductor L5 are electrically grounded. The effect is that the uplink suppression filter is a four-order high-pass filter, and filters uplink signals of the CABLE MODEM, EOC and other modules.
Referring to fig. 1, in order to achieve the purpose of effectively filtering the communication signal, the WI-FI suppression filter is sequentially connected in series with an inductor L6, an inductor L7, an inductor L8, and an inductor L9, one side of the inductor L6 is electrically connected to a capacitor C11, one side of the inductor L7 is electrically connected to a capacitor C12, one side of the inductor L8 is electrically connected to a capacitor C13, the capacitor C11, the capacitor C12, and the capacitor C13 are respectively electrically grounded, and the downlink low-pass filter includes an inductor L10, an inductor L11, an inductor L12, an inductor L13, an inductor L14, and a capacitor C23, which are sequentially connected in series. The WI-FI suppression filter is a third-order low-pass filter and filters signals such as WI-FI, mobile phones and MOCA.
Referring to fig. 1, for the purpose of filtering the downlink signal, the upper and lower ends of the inductor L11 are respectively connected in parallel with a capacitor C14, a capacitor C15, and a capacitor C16, the upper and lower ends of the inductor L12 are respectively connected in parallel with a capacitor C17, a capacitor C16, and a capacitor C18, the upper and lower ends of the inductor L13 are respectively connected in parallel with a capacitor C19, a capacitor C18, and a capacitor 20, the upper and lower ends of the inductor L14 are respectively connected in parallel with a capacitor C21, a capacitor C20, and a capacitor C22, and the capacitor C15, the capacitor C16, the capacitor C18, the capacitor C20, and the capacitor C22 are respectively electrically grounded. The effect is that the downlink low-pass filter is a fourth-order low-pass filter, so that broadband band-pass from the initial frequency of 5MHz to the cut-off frequency of 65MHz is realized, and signals filtered by the downlink low-pass filter are transmitted to the RF interface and return to the wired network.
The use principle and the advantages are as follows:
when the filter is used, the uplink suppression filter is a four-order high-pass filter and filters uplink signals of CABLE MODEM, EOC and other modules; the WI-FI suppression filter is a third-order low-pass filter and filters signals such as WI-FI, a mobile phone, MOCA and the like; the uplink suppression filter and the WI-FI suppression filter are connected in series front and back to realize broadband band-pass from the initial frequency of 110MHz to the cutoff frequency of 1000MHz, and signals input by the RF interface are transmitted to the downlink module after being filtered. The downlink low-pass filter is a fourth-order low-pass filter, broadband band-pass within the range from the initial frequency of 5MHz to the cut-off frequency of 65MHz is realized, and the signals filtered by the uplink module are transmitted to the RF interface and return to the wired network. The triple broadband filter has high out-of-band rejection and low in-band insertion loss, can effectively filter various interferences in cable digital television signals, and is suitable for product applications such as intelligent gateways, set top boxes and the like. The low frequency EOC and Cable modem of the gateway product need strong uplink strong signals, and the downlink module of the gateway product needs to receive cleaner RF signals to ensure the high quality of the received signals.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A triple broadband filter comprising an upstream suppression filter, a WI-FI suppression filter, and a downstream low pass filter, characterized in that: the rear end of the uplink suppression filter is electrically connected with a WI-FI suppression filter through a capacitor C10, the rear end of the WI-FI suppression filter is electrically connected with a downlink module, the uplink suppression filter is electrically connected with a downlink low-pass filter, the rear end of the downlink low-pass filter is electrically connected with an uplink module, the uplink suppression filter adopts a four-order high-pass filter, the WI-FI suppression filter adopts a three-order low-pass filter, and the downlink low-pass filter adopts a four-order low-pass filter.
2. A triple broadband filter according to claim 1, wherein: one end of the uplink suppression filter and one end of the downlink low-pass filter are electrically connected with a capacitor C1.
3. A triple broadband filter according to claim 1, wherein: the uplink suppression filter is sequentially connected with an inductor L1, a capacitor C2, a capacitor C4, a capacitor C6 and a capacitor C8 in series.
4. A triple wide band filter according to claim 3, wherein: one side of the uplink suppression filter capacitor C2 is electrically connected with a capacitor C3 and an inductor L2, one side of the capacitor C4 is electrically connected with an inductor L3 and a capacitor C5, one side of the capacitor C6 is electrically connected with an inductor L4 and a capacitor C7, and one side of the capacitor C8 is electrically connected with a capacitor C9 and an inductor L5.
5. A triple wide band filter according to claim 4, wherein: the inductor L2, the capacitor C5, the capacitor C7 and the inductor L5 are electrically grounded.
6. A triple broadband filter according to claim 1, wherein: the WI-FI suppression filter is sequentially connected with an inductor L6, an inductor L7, an inductor L8 and an inductor L9 in series, one side of the inductor L6 is electrically connected with a capacitor C11, one side of the inductor L7 is electrically connected with a capacitor C12, one side of the inductor L8 is electrically connected with a capacitor C13, and the capacitor C11, the capacitor C12 and the capacitor C13 are respectively and electrically grounded.
7. A triple broadband filter according to claim 1, wherein: the downlink low-pass filter comprises an inductor L10, an inductor L11, an inductor L12, an inductor L13, an inductor L14 and a capacitor C23 which are sequentially connected in series.
8. A triple wide band filter according to claim 7, wherein: the upper end and the lower end of the inductor L11 are respectively connected with a capacitor C14, a capacitor C15 and a capacitor C16 in parallel, the upper end and the lower end of the inductor L12 are respectively connected with a capacitor C17, a capacitor C16 and a capacitor C18 in parallel, the upper end and the lower end of the inductor L13 are respectively connected with a capacitor C19, a capacitor C18 and a capacitor 20 in parallel, the upper end and the lower end of the inductor L14 are respectively connected with a capacitor C21, a capacitor C20 and a capacitor C22 in parallel, and the capacitor C15, the capacitor C16, the capacitor C18, the capacitor C20 and the capacitor C22 are respectively electrically grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120142365.3U CN214626935U (en) | 2021-01-19 | 2021-01-19 | Triple broadband filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120142365.3U CN214626935U (en) | 2021-01-19 | 2021-01-19 | Triple broadband filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214626935U true CN214626935U (en) | 2021-11-05 |
Family
ID=78437274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120142365.3U Active CN214626935U (en) | 2021-01-19 | 2021-01-19 | Triple broadband filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214626935U (en) |
-
2021
- 2021-01-19 CN CN202120142365.3U patent/CN214626935U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103597744B (en) | Channel-splitting filter | |
| CN101662056A (en) | Tri-frequency microwave bandpass filter | |
| CN112202417A (en) | Low-frequency lumped parameter band-pass filter | |
| CN214626935U (en) | Triple broadband filter | |
| CN114584095A (en) | Amplitude equalization filter circuit based on narrowband carrier frequency modulation | |
| CN112803917A (en) | Low group delay fluctuation and high inhibition filter and implementation method thereof | |
| CN112072242A (en) | Filter structure and filter | |
| CN106454190A (en) | Band-pass filter having high out-of-band rejection of broad band | |
| CN101038977A (en) | Open loop coupling band-pass filter based on microstrip capacitive load | |
| CN209658373U (en) | A kind of low intermodulation wideband two-way combiner | |
| CN107689782B (en) | Filter for inhibiting second harmonic | |
| CN116032243A (en) | Band-pass filter circuit of high roll-off of big bandwidth | |
| US20090237183A1 (en) | Low-pass filter | |
| CN212434808U (en) | Filter structure and filter | |
| CN206135846U (en) | There is high suppression degree of outband just to require high pass filter of in -band flatness | |
| CN209787130U (en) | High-power band-pass filter | |
| CN101853975A (en) | Low-loss band-pass filter based on defected ground structure | |
| CN211791459U (en) | MOCA filter | |
| CN208797149U (en) | A kind of ultra wide band bandpass filter based on mirror image open circuit step electric impedance resonator | |
| CN215452899U (en) | EMI suppression circuit and EMI suppressor | |
| CN210351141U (en) | Broadband mixing filter circuit compatible with 5G communication frequency band | |
| CN211209677U (en) | Low-pass filter with small dynamic high out-of-band rejection | |
| CN218632397U (en) | Coupling line band-pass filter | |
| CN215186667U (en) | Band-stop filter and multi-frequency band-stop filter | |
| CN218941065U (en) | Dual-channel filter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |