CN201985824U - Low-frequency-division two-way filter - Google Patents
Low-frequency-division two-way filter Download PDFInfo
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- CN201985824U CN201985824U CN2011200244949U CN201120024494U CN201985824U CN 201985824 U CN201985824 U CN 201985824U CN 2011200244949 U CN2011200244949 U CN 2011200244949U CN 201120024494 U CN201120024494 U CN 201120024494U CN 201985824 U CN201985824 U CN 201985824U
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Abstract
The utility model relates to a low-frequency-division two-way filter, which belongs to a television and communication two-way transmission technology and comprises a high-pass filter and a low-pass filter, wherein the high-pass filter comprises a single-ring inductance coil, four capacitors and inductor and capacitor serial connection circuits, the single-ring inductance coil and the four capacitors are connected in series between a public end and a high-frequency end, the inductor and capacitor serial connection circuits are respectively connected between connecting points of every two capacitors and the ground, the low-pass filter comprises four inductors, a hollow inductance coil and capacitors, the four inductors and the hollow inductance coil are respectively connected in series between the public end and the low-frequency end, the capacitors are respectively connected between the connecting points of every two inductors and the ground, and a capacitor is respectively connected in parallel onto the back three inductors in the four inductors. All of the capacitors adopt 1206 surface pasting ceramic capacitors with the precision being 1 percent. The inductors adopt magnetic rings arranged in a plastic framework or magnetic-core-adjustable type inductors with the plastic framework. The circuit design of the low-frequency-division two-way filter is reasonable, so the consistency, the reliability and the technical characteristics of the two-way filter are improved. The low-frequency-division two-way filter can be widely applied to two-way amplifiers and other relevant circuits.
Description
Technical field
The utility model belongs to TV and communication transmitted in both directions technical field, more particularly relates to the design improvement of low frequency division bidirectional filter.
Background technology
Bidirectional filter is the vitals that two-way amplifier is realized transmitted in both directions, comprises high pass filter and low pass filter.The general employing of the transmission of TV signal is low cuts apart the frequency division method, promptly adopts the frequency range of up 5MHz-30MHz/65MHz, descending 50MHz-550MHz/870MHz to transmit the uplink and downlink signal respectively.The common port of bidirectional filter is the point that is connected with other coaxial cable, and the signal in entire spectrum 5MHz～550MHz/870MHz can both pass through.Front end is the output port of high pass filter, because high pass filter has the high resistant characteristic to low frequency signal, the low frequency signal that appears at low frequency end and common port is stoped by high pass filter can not arrive front end.Equally, the high-frequency signal of supply high frequency end or common port is subjected to the low pass filter prevention and can not arrives low frequency end.High-frequency signal can freely pass through high pass filter from both direction, but exists only between common port and the front end.Low frequency signal can freely pass through low pass filter from both direction, but exists only between common port and the low frequency end.
The electric capacity of tradition bidirectional filter adopts 0805 patch capacitor mostly, and precision is lower; Size dimension is less, be 1.6mmx0.8mm, thereby radiating condition is relatively poor.The inductance value of the magnet ring that its inductance element adopts and the discreteness of size are bigger, and consistency is relatively poor, and the Q value is hanged down in machine debugging can not carry out fine adjustment.Therefore, the consistency of traditional bidirectional filter, reliability and performance parameter are all relatively poor.
Summary of the invention
The purpose of this utility model just is to overcome above-mentioned shortcoming and defect, and a kind of low frequency division bidirectional filter is provided.Its circuit design is reasonable, and all to adopt precision be 1% 1206 surface mount ceramic condensers to electric capacity, and inductance adopts that discreteness is little, high conformity, Q value are higher is installed in the magnet ring in the plastic skeleton or is with the adjustable magnetic-core type inductance of plastic skeleton.Fine adjustment be can in debugging, carry out, thereby consistency, reliability and the technical characteristic of bidirectional filter improved.
In order to achieve the above object, the utility model comprise be connected the high pass filter between common port and the front end and be connected common port and low frequency end between low pass filter.High pass filter comprises individual pen inductance coil and 4 electric capacity that are connected between common port and the front end and tie point and inductance between the ground and the capacitor seriesing circuit that is connected to above-mentioned per two electric capacity; Low pass filter comprises 4 inductance and air-core inductances and tie point that is connected to above-mentioned per two inductance and the electric capacity between the ground that is connected between common port and the low frequency end, electric capacity also in parallel respectively on back 3 inductance in 4 inductance.
All all to adopt precision be 1% 1206 surface mount ceramic condensers to electric capacity.The size of 1206 surface mount ceramic condensers is bigger, is 2.0mmx1.2mm, and radiating condition is better.Inductance adopts magnet ring that is installed in the plastic skeleton or the adjustable magnetic-core type inductance of being with plastic skeleton.Its discreteness is little, high conformity, Q value are higher, and result of use is good.
Task of the present utility model comes to this and finishes.
The utility model circuit design is reasonable, and all to adopt precision be 1% 1206 surface mount ceramic condensers to electric capacity, and inductance adopts that discreteness is little, high conformity, Q value are higher is installed in the magnet ring in the plastic skeleton or is with the adjustable magnetic-core type inductance of plastic skeleton.Fine adjustment be can carry out, thereby consistency, reliability and the technical characteristic of bidirectional filter improved.It can be widely used in two-way amplifier and other interlock circuit.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
Embodiment 1.A kind of low frequency division bidirectional filter, as shown in Figure 1.
It comprises be connected the high pass filter 4 between common port 1 and the front end 2 and be connected common port 1 and low frequency end 3 between low pass filter 5.High pass filter 4 comprises individual pen inductance coil 14 and 4 electric capacity 6 that are connected between common port 1 and the front end 2 and is connected to the tie point 7 of above-mentioned per two electric capacity 6 and the series circuit of inductance 8 between the ground and electric capacity 9; Low pass filter 5 comprise 4 inductance 10 and air-core inductances 15 that are connected between common port 1 and the low frequency end 3 and be connected to the tie point of above-mentioned per two inductance 10 and air-core inductance 15 and back 3 inductance in 13,4 inductance 10 of the electric capacity between the ground on electric capacity 12 also in parallel respectively.
It is 1% 1206 surface mount ceramic condensers that above-mentioned whole electric capacity all adopts precision.Inductance adopts that discreteness is little, high conformity, Q value are higher is installed in the magnet ring in the plastic skeleton or is with the adjustable magnetic-core type inductance of plastic skeleton, can carry out fine adjustment.Inductance 8 is totally 3 among the figure, and two of close front end 2 is adjustable magnetic-core type inductance, and all the other 1 is magnet ring.In 4 inductance 10, middle two is adjustable magnetic-core type inductance, and two of both sides is magnet ring.
Claims (3)
1. one kind low frequency division bidirectional filter, comprise be connected the high pass filter between common port and the front end and be connected common port and low frequency end between low pass filter, it is characterized in that high pass filter comprises individual pen inductance coil and 4 electric capacity that are connected between common port and the front end and tie point and inductance between the ground and the capacitor seriesing circuit that is connected to above-mentioned per two electric capacity; Low pass filter comprises 4 inductance and air-core inductances and tie point that is connected to above-mentioned per two inductance and the electric capacity between the ground that is connected between common port and the low frequency end, electric capacity also in parallel respectively on back 3 inductance in 4 inductance.
2. according to the described low frequency division bidirectional filter of claim 1, it is characterized in that it is 1% 1206 surface mount ceramic condensers that said whole electric capacity all adopts precision.
3. according to claim 1 or 2 described low frequency division bidirectional filters, it is characterized in that said inductance adopts that discreteness is little, high conformity, Q value are higher is installed in the magnet ring in the plastic skeleton or is with the adjustable magnetic-core type inductance of plastic skeleton.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200244949U CN201985824U (en) | 2011-01-21 | 2011-01-21 | Low-frequency-division two-way filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200244949U CN201985824U (en) | 2011-01-21 | 2011-01-21 | Low-frequency-division two-way filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201985824U true CN201985824U (en) | 2011-09-21 |
Family
ID=44613274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200244949U Expired - Fee Related CN201985824U (en) | 2011-01-21 | 2011-01-21 | Low-frequency-division two-way filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201985824U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111884621A (en) * | 2020-07-24 | 2020-11-03 | 北京航天新风机械设备有限责任公司 | Chip-scale micro-packaged band-pass filter and packaging method thereof |
-
2011
- 2011-01-21 CN CN2011200244949U patent/CN201985824U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111884621A (en) * | 2020-07-24 | 2020-11-03 | 北京航天新风机械设备有限责任公司 | Chip-scale micro-packaged band-pass filter and packaging method thereof |
| CN111884621B (en) * | 2020-07-24 | 2021-10-08 | 北京新风航天装备有限公司 | Chip-scale micro-packaged band-pass filter and packaging method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110921 Termination date: 20180121 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |