CN203151446U - Five-in-one electrically tunable filter - Google Patents
Five-in-one electrically tunable filter Download PDFInfo
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- CN203151446U CN203151446U CN2013200419904U CN201320041990U CN203151446U CN 203151446 U CN203151446 U CN 203151446U CN 2013200419904 U CN2013200419904 U CN 2013200419904U CN 201320041990 U CN201320041990 U CN 201320041990U CN 203151446 U CN203151446 U CN 203151446U
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- filter
- frequency
- inductance
- radio
- switch
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Abstract
The utility model discloses a five-in-one electrically tunable filter comprising the following elements: a filter module provided with a first filter, a second filter, a third filter, a fourth filter and a fifth filter; a first radio frequency switch and a second radio frequency switch respectively connected with a front end and a rear end of the filter module; and a main control module connected with the filter module, the first radio frequency switch and the second radio frequency switch. The five-in-one electrically tunable filter combines five filters with the radio frequency switches switching between 30MHz-1000MHz so as to obtain a wide coverage effect; and also has the advantages of miniaturization and low-power.
Description
Technical field
The utility model relates to a kind of filter, in particular, and the particularly 30MHz of a kind of miniaturization and low-power consumption～1000MHz five in one type electrically tunable filter.
Background technology
In recent years, along with the develop rapidly of electronic technology, the application of radio communication technology more and more widely.And the important component part that radio-frequency front-end is received and dispatched as communication equipment, main function is will receive high-frequency signal to screen when receiving; In the effective useless emission clutter frequency of filtering of when emission, and prevent that the air interference signal of other transmitter from entering this transmitter.Along with the raising of user to volume, power consumption and other specification requirements of radio-frequency front-end, radio-frequency front-end need develop towards the direction of more and more miniaturization and low power consumption.
The utility model content
The purpose of this utility model is to provide five in one type electrically tunable filter a kind of miniaturization and low-power consumption, that cover 30MHz～1000MHz.
In order to solve problem set forth above, the technical solution adopted in the utility model is: a kind of five in one type electrically tunable filter, it comprise have first filter, the filter module of second filter, the 3rd filter, the 4th filter and the 5th filter, be connected to first radio-frequency (RF) switch and second radio-frequency (RF) switch of filter module front-end and back-end, and the master control module that is connected with filter module, first radio-frequency (RF) switch and second radio-frequency (RF) switch.
Preferably, described first radio-frequency (RF) switch and second radio-frequency (RF) switch are five and select a radio-frequency (RF) switch.
Preferably, described first filter, second filter, the 3rd filter, the 4th filter is identical with the model of the 5th filter, include diode (D1, D2, D3, D4, D5, D6, D7, D8), resistance (R1, R2), electric capacity (C1, C2, C3, C4), inductance (L1, L2, L3, L4, L5, L6, L7), resistance (R1 wherein, R2) end connects power Vcc, resistance R 1 other end and electric capacity (C1, C2) end, diode (D1, D2, D3, D4) negative electrode connects, electric capacity (C1, C2) other end ground connection, diode (D1, D2, D3, D4) anode and inductance (L1, L2) end connects, and inductance L 2 other ends are connected with inductance L 3, and ground connection; Resistance R 2 other ends are connected with electric capacity (C3, a C4) end, diode (D5, D6, D7, D8) negative electrode, electric capacity (C1, C2) other end ground connection, diode (D5, D6, D7, D8) anode is connected with inductance (L5, a L6) end, and inductance L 5 other ends connect and ground connection with inductance L 6; Inductance (L1, the L6) other end is through inductance L 4 ground connection.
Preferably, described diode (D1, D2, D3, D4, D5, D6, D7, D8) holds the change diode.
Preferably, the tuning range of described first filter is 30MHz～90 MHz, the tuning range of described second filter is 90MHz～225MHz, the tuning range of described the 3rd filter is 225MHz～512MHz, the tuning range of described the 4th filter is 512MHz～750MHz, and the tuning range of described the 5th filter is 750MHz～1000MHz.
Compared with prior art, the beneficial effects of the utility model are: the radio-frequency (RF) switch that combines five filters and switch in 30MHz～1000MHz has reached the effect of wide coverage, also has miniaturization and advantage of low power consumption simultaneously.
Description of drawings
Fig. 1. be the schematic diagram of five in one type electrically tunable filter of the present utility model.
Fig. 2. be the circuit diagram of the radio-frequency (RF) switch in the five in one type electrically tunable filter of the present utility model.
Fig. 3. be the circuit diagram of the filter in the five in one type electrically tunable filter of the present utility model.
Embodiment
Below in conjunction with embodiment and accompanying drawing the utility model is described in further detail, but execution mode of the present utility model is not limited thereto.
Consult shown in Figure 1 because 30MHz～frequency range that 1000MHz covers is wideer, can not satisfy instructions for use as the tuning range that adopts single filter, and the performance index of single filter is poor; Based on this, the utility model provides the five in one type electrically tunable filter of a kind of 30 MHz of satisfying～1000MHz, it comprise have first filter 1, the filter module 6 of second filter 2, the 3rd filter 3, the 4th filter 4 and the 5th filter 5, be connected to first radio-frequency (RF) switch 7 and second radio-frequency (RF) switch 8 of filter module 6 front-end and back-end, and the master control module CPU that is connected with filter module 6, first radio-frequency (RF) switch 7 and second radio-frequency (RF) switch 8.And on concrete tuning range is divided, the tuning range that adopts first filter 1 is 30MHz～90 MHz, the tuning range of second filter 2 is 90MHz～225MHz, the tuning range of the 3rd filter 3 is 225MHz～512MHz, the tuning range of the 4th filter 4 is 512MHz～750MHz, the tuning range of the 5th filter 5 is 750MHz～1000MHz, and every index obtains reasonable optimization behind the filter segmented tuning of Hua Fening like this.
Consult shown in Figure 2, more specifically, first radio-frequency (RF) switch 7 and second radio-frequency (RF) switch 8 are five and select a radio-frequency (RF) switch, adopt identical model, realize being connected with adopting five parallel resistor R between the master control module CPU, and with first filter 1, second filter 2, the 3rd filter 3, the 4th filter 4 and the 5th filter 5(are RF1, RF2, RF3, RF4 and RF5) between adopt five capacitor C to realize connecting, employing first radio-frequency (RF) switch 7 and second radio-frequency (RF) switch 8 can be at first filters 1 like this, second filter 2, the 3rd filter 3, switch between the 4th filter 4 and the 5th filter 5, to reach different frequency modulation results.Simultaneously, first radio-frequency (RF) switch 7 and second radio-frequency (RF) switch 8 all have extremely low insertion loss, high switch isolation degree, and crosstalking of radiofrequency signal solved extremely excellent effect.
Consult shown in Figure 3, first filter 1, second filter 2, the 3rd filter 3, the 4th filter 4 is identical with the model of the 5th filter 5, include diode (D1, D2, D3, D4, D5, D6, D7, D8), resistance (R1, R2), electric capacity (C1, C2, C3, C4), inductance (L1, L2, L3, L4, L5, L6, L7), resistance (R1 wherein, R2) end connects power Vcc, resistance R 1 other end and electric capacity (C1, C2) end, diode (D1, D2, D3, D4) negative electrode connects, electric capacity (C1, C2) other end ground connection, diode (D1, D2, D3, D4) anode and inductance (L1, L2) end connects, and inductance L 2 other ends are connected with inductance L 3, and ground connection; Resistance R 2 other ends are connected with electric capacity (C3, a C4) end, diode (D5, D6, D7, D8) negative electrode, electric capacity (C1, C2) other end ground connection, diode (D5, D6, D7, D8) anode is connected with inductance (L5, a L6) end, and inductance L 5 other ends connect and ground connection with inductance L 6; Inductance (L1, the L6) other end is through inductance L 4 ground connection.And diode (D1, D2, D3, D4, D5, D6, D7, D8) holds the change diode.And because five filters of filter module 6 all are to adopt high Q variable capacitance diode as the double tunning coupling filter of tuned cell, it is little that it inserts loss, it is big that near-end suppresses, every indexs such as sensitivity, selectivity and dynamic range of transceiver have so just been improved, and five filters are integrated in an inside modules, integrated level has only 1/4th sizes of common cigarette case volume, realized high integration, improved the interior fluctuation of sensitivity, noise factor, low strap of receiver, high signal-selectivity, closely interior frequency with vicinity is not disturbed mutually.Simultaneously, the tuning switched capacitor array that replaced of variable capacitance diode (D1, D2, D3, D4, D5, D6, D7, D8) that adopts is tuning, power consumption of the present utility model has been reduced more than 2/3rds, for more miniaturization, the low power consumption of radio-frequency front-end brought convenience.On mounting structure, five in one type electrically tunable filter of the present utility model adopts the metal shell encapsulation to guarantee the anti-interference condition of complicated electromagnetism at last.
Above-described embodiment is the utility model preferred implementation; but execution mode of the present utility model is not restricted to the described embodiments; other any do not deviate from change, the modification done under spiritual essence of the present utility model and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within the protection range of the present utility model.
Claims (5)
1. five in one type electrically tunable filter, it is characterized in that: comprise have first filter (1), the filter module (6) of second filter (2), the 3rd filter (3), the 4th filter (4) and the 5th filter (5), be connected to first radio-frequency (RF) switch (7) and second radio-frequency (RF) switch (8) of filter module (6) front-end and back-end, and the master control module (CPU) that is connected with filter module (6), first radio-frequency (RF) switch (7) and second radio-frequency (RF) switch (8).
2. five in one type electrically tunable filter according to claim 1, it is characterized in that: described first radio-frequency (RF) switch (7) and second radio-frequency (RF) switch (8) are five and select a radio-frequency (RF) switch.
3. five in one type electrically tunable filter according to claim 1, it is characterized in that: described first filter (1), second filter (2), the 3rd filter (3), the 4th filter (4) is identical with the model of the 5th filter (5), include diode (D1, D2, D3, D4, D5, D6, D7, D8), resistance (R1, R2), electric capacity (C1, C2, C3, C4), inductance (L1, L2, L3, L4, L5, L6, L7), resistance (R1 wherein, R2) end connects power Vcc, resistance (R1) other end and electric capacity (C1, C2) end, diode (D1, D2, D3, D4) negative electrode connects, electric capacity (C1, C2) other end ground connection, diode (D1, D2, D3, D4) anode and inductance (L1, L2) end connects, and inductance (L2) other end is connected with inductance (L3), and ground connection; Resistance (R2) other end is connected with electric capacity (C3, a C4) end, diode (D5, D6, D7, D8) negative electrode, electric capacity (C1, C2) other end ground connection, diode (D5, D6, D7, D8) anode is connected with inductance (L5, a L6) end, and inductance (L5) other end connects and ground connection with inductance (L6); Inductance (L1, the L6) other end is through inductance (L4) ground connection.
4. five in one type electrically tunable filter according to claim 3 is characterized in that: described diode (D1, D2, D3, D4, D5, D6, D7, D8) appearance change diode.
5. according to each described five in one type electrically tunable filter of claim 1-4, it is characterized in that: the tuning range of described first filter (1) is 30MHz～90 MHz, the tuning range of described second filter (2) is 90MHz～225MHz, the tuning range of described the 3rd filter (3) is 225MHz～512MHz, the tuning range of described the 4th filter (4) is 512MHz～750MHz, and the tuning range of described the 5th filter (5) is 750MHz～1000MHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200419904U CN203151446U (en) | 2013-01-27 | 2013-01-27 | Five-in-one electrically tunable filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200419904U CN203151446U (en) | 2013-01-27 | 2013-01-27 | Five-in-one electrically tunable filter |
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| Publication Number | Publication Date |
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| CN203151446U true CN203151446U (en) | 2013-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013200419904U Expired - Fee Related CN203151446U (en) | 2013-01-27 | 2013-01-27 | Five-in-one electrically tunable filter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112073030A (en) * | 2020-08-12 | 2020-12-11 | 武汉博畅通信设备有限责任公司 | Electrically tunable filter |
-
2013
- 2013-01-27 CN CN2013200419904U patent/CN203151446U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112073030A (en) * | 2020-08-12 | 2020-12-11 | 武汉博畅通信设备有限责任公司 | Electrically tunable filter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20130821 Termination date: 20140127 |