CN207732731U - A kind of choke circuit of low cost ultra wide band - Google Patents
A kind of choke circuit of low cost ultra wide band Download PDFInfo
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- CN207732731U CN207732731U CN201721791909.9U CN201721791909U CN207732731U CN 207732731 U CN207732731 U CN 207732731U CN 201721791909 U CN201721791909 U CN 201721791909U CN 207732731 U CN207732731 U CN 207732731U
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- choke circuit
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Abstract
The utility model belongs to choking-winding technical field more particularly to a kind of choke circuit of inexpensive ultra wide band, including：No less than 4 magnetic beads (E1, E2, E3, E4), an inductance and a resistance；Inductance and resistor coupled in parallel one end are direct-flow input end, and magnetic bead E4 is linked with amplifier.The choke circuit works rated current more than 200mA.Choke circuit working frequency 100KHz to 8GHz.The utility model has the advantage that relative to other choke circuits：1) it has excellent performance, S21 is more than 0.5dB in 100KHz to 8GHz frequency ranges.2) the case where choke circuit relative to series inductance composition, the gain flatness of amplifier tube is more excellent, and there is no abrupt gains.3) relative to single broadband choking-winding, price is cheaper, more flexible in PCB layouts due to being constituted using multiple gadgets, has great advantage for the PCB design for having space to limit.4) it can be reference with this circuit, by increasing and decreasing magnetic bead quantity, change magnetic bead and inductance parameters etc..
Description
Technical field
The utility model is related to choking-winding technical fields, refer specifically to a kind of choke circuit of inexpensive ultra wide band.
Background technology
It is continuously improved with the requirement of Mobile communication bandwidth, increasingly higher demands is proposed to test equipment, should be met
Broadband character meets certain sensitivity again, so test equipment front end needs to install wideband low noise amplifier.Amplifier
Choking-winding is needed to provide direct current biasing, the purpose is to AC signal is isolated to DC power supply and is injected a direct current biasing.
Ideally all AC signals on direct current biasing circuit can all be choked inductance loop seclusion, and AC signal is prevented to be distorted.
In wideband biasing application, all not enough impedance bandwidth of most of inductance.By three or four inductance series connection
Bandwidth can be increased, but contain that the flatness of signal is less desirable (for example amplifier output gain is uneven).It can also adopt
Wide bandwidth is provided in single inductance with wideband choke coil, wideband choke coil price on the market is very high, although broadband
It is very wide, but actual test gets off to find that the low-band gain of amplifier and the gain flatness of entire frequency range are not to manage very much
Think.
Utility model content
The utility model overcomes the shortcomings of the prior art, technical problem to be solved to be：A kind of low cost is provided
The choke circuit of ultra wide band.
In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model is：A kind of low cost ultra wide band is gripped
Current circuit, including：No less than 4 magnetic beads (E1, E2, E3, E4), an inductance and a resistance；Inductance and resistor coupled in parallel one end
For direct-flow input end, magnetic bead E4 is linked with amplifier.
As a kind of optimal technical scheme of the utility model, which works rated current more than 200mA.
As a kind of optimal technical scheme of the utility model, choke circuit working frequency 100KHz to 8GHz.
The utility model has the advantages that compared with prior art：The utility model core is by 4 magnetic beads, one
Inductance and resistance composition, can be applied to it is any required control AC signal frequency from 100KHz to 8GHz in circuit
In.It is had the advantage that relative to other choke circuits：
1) it has excellent performance, S21 is more than -0.5dB in 100KHz to 8GHz frequency ranges.
2) choke circuit relative to series inductance composition, the gain flatness of amplifier tube is more excellent, and gain is not present
The case where mutation.
3) relative to single broadband choking-winding, price is cheaper, due to being constituted using multiple gadgets, in PCB cloth
It is more flexible in office, have great advantage for the PCB design for thering is space to limit.
4) it can be reference with this circuit, by increasing and decreasing magnetic bead quantity, change magnetic bead and inductance parameters etc., design more
The circuit that the practical frequency range of fitting and amplifier current require.
Description of the drawings
The utility model is described in more detail below in conjunction with the accompanying drawings.
Fig. 1 is the circuit link relational graph of the utility model.
Fig. 2 is the broadband LNA circuits link relational graph designed with the choke circuit of the utility model.
Specific implementation mode
It is new below in conjunction with this practicality to keep the purpose, technical scheme and advantage of the utility model embodiment clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is a part of the embodiment of the utility model, instead of all the embodiments；Based on the reality in the utility model
Example is applied, the every other embodiment that those of ordinary skill in the art are obtained without creative efforts all belongs to
In the range of the utility model protection.
As shown in Figure 1, a kind of choke circuit of inexpensive ultra wide band of the utility model, including：No less than 4 magnetic beads
(E1, E2, E3, E4), an inductance and a resistance；Inductance and resistor coupled in parallel one end are direct-flow input end, magnetic bead E4 and amplification
Device links.The choke circuit works rated current more than 200mA.Choke circuit working frequency 100KHz to 8GHz.
Inductance and resistor coupled in parallel one end are direct-flow input end, and magnetic bead E4 is linked with amplifier, and entire circuit is equivalent to one
Choking-winding, effect are the AC signals for providing direct current biasing for amplifier, while controlling amplifier chain, and anti-stop signal loses
Very, it is ensured that amplifier works normally in entire wide-band.
Fig. 2 is the broadband LNA circuits designed with the choke circuit of the utility model, using this choke circuit as LNA
Direct current biasing component part.LNA uses HMC8410 (0.01GHz to 10GHz).Test result finds that the gain of LNA is non-
Very close to the yield value of the databook of LNA devices, change in gain is very continuous in entire frequency range.
The utility model core can be applied to any need and controlled by 4 magnetic beads, an inductance and a resistance composition
AC signal frequency from 100KHz to 8GHz in circuit in.It is had the advantage that relative to other choke circuits：
1) it has excellent performance, S21 is more than -0.5dB in 100KHz to 8GHz frequency ranges.
2) choke circuit relative to series inductance composition, the gain flatness of amplifier tube is more excellent, and gain is not present
The case where mutation.
3) relative to single broadband choking-winding, price is cheaper, due to being constituted using multiple gadgets, in PCB cloth
It is more flexible in office, have great advantage for the PCB design for thering is space to limit.
4) it can be reference with this circuit, by increasing and decreasing magnetic bead quantity, change magnetic bead and inductance parameters etc., design more
The circuit that the practical frequency range of fitting and amplifier current require.
Finally it should be noted that：The above various embodiments is only to illustrate the technical solution of the utility model, rather than limits it
System；Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should
Understand：It still can be with technical scheme described in the above embodiments is modified, either to which part or whole
Technical characteristic carries out equivalent replacement；And these modifications or replacements, this practicality that it does not separate the essence of the corresponding technical solution are new
The range of each embodiment technical solution of type.
Claims (3)
1. a kind of choke circuit of low cost ultra wide band, which is characterized in that including：No less than 4 magnetic beads (E1, E2, E3, E4),
One inductance and a resistance；Inductance and resistor coupled in parallel one end are direct-flow input end, and magnetic bead E4 is linked with amplifier.
2. a kind of choke circuit of inexpensive ultra wide band according to claim 1, which is characterized in that the choke circuit works
Rated current is more than 200mA.
3. a kind of choke circuit of inexpensive ultra wide band according to claim 2, which is characterized in that the choke circuit works
Frequency 100KHz to 8GHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721791909.9U CN207732731U (en) | 2017-12-20 | 2017-12-20 | A kind of choke circuit of low cost ultra wide band |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721791909.9U CN207732731U (en) | 2017-12-20 | 2017-12-20 | A kind of choke circuit of low cost ultra wide band |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207732731U true CN207732731U (en) | 2018-08-14 |
Family
ID=63085437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721791909.9U Active CN207732731U (en) | 2017-12-20 | 2017-12-20 | A kind of choke circuit of low cost ultra wide band |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207732731U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109302154A (en) * | 2017-12-20 | 2019-02-01 | 上海创远仪器技术股份有限公司 | A kind of choke circuit of low cost ultra wide band |
-
2017
- 2017-12-20 CN CN201721791909.9U patent/CN207732731U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109302154A (en) * | 2017-12-20 | 2019-02-01 | 上海创远仪器技术股份有限公司 | A kind of choke circuit of low cost ultra wide band |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: Block C, No. 7, Lane 205, Gaoji Road, Songjiang District, Shanghai, 201601 Patentee after: Chuangyuan Xinke (Shanghai) Technology Co.,Ltd. Address before: 200000 building 6, No. 351, siban Road, Sijing Town, Songjiang District, Shanghai Patentee before: TRANSCOM INSTRUMENTS Co.,Ltd. |
|
| CP03 | Change of name, title or address |