CN202160173U - Front-end micro-strip filter of receiver - Google Patents
Front-end micro-strip filter of receiver Download PDFInfo
- Publication number
- CN202160173U CN202160173U CN2011203076201U CN201120307620U CN202160173U CN 202160173 U CN202160173 U CN 202160173U CN 2011203076201 U CN2011203076201 U CN 2011203076201U CN 201120307620 U CN201120307620 U CN 201120307620U CN 202160173 U CN202160173 U CN 202160173U
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- filter
- preselection
- receiver
- prime
- utility
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Abstract
The utility model discloses a front-end micro-strip filter of a receiver, comprising a pre-stage preselector filter, a low noise amplifier, a post preselector filter, a band rejection filter and a mixer orderly connected. The pre-stage preselector filter and the post preselector filter are in common connection with a variable capacitance diode. The front-end micro-strip filter of receiver of the utility model can process the received high-frequency signal to obtain 63 MHz of signal so as to be amplified by a preamplifier.
Description
Technical field
The utility model belongs to technical field of electronic equipment, relates to a kind of receiver front end microstrip filter.
Background technology
Receiver receives the signal from earth station as the reception extension set of LDME-4 type distance measuring equipment, after amplification, control, detection, delivers to signal processing unit with the mode of vision signal, supplies the usefulness of range finding, has self-checking function simultaneously.
Need be provided with the receiver front end microstrip filter on the receiver, can the high-frequency signal that receive be handled the signal that obtains 63MHz like this and supply preamplifier to amplify, and also not have the receiver front end filter to occur now.
Summary of the invention
The purpose of the utility model provides a kind of receiver front end microstrip filter, can the high-frequency signal that receive be handled the signal that obtains 63MHz and supply preamplifier to amplify.
The technical scheme that the utility model adopted is; The receiver front end microstrip filter; Comprise the prime preselection filter, low noise amplifier, back level preselection filter, band stop filter, the frequency mixer that link to each other successively, the prime preselection filter is connected with variable capacitance diode jointly with back level preselection filter.
The characteristic of the utility model also is,
Variable capacitance diode comprises microstrip line, and the two ends of microstrip line connect prime preselection filter and back level preselection filter respectively, and microstrip line is provided with electric capacity, and the two ends of electric capacity also are respectively arranged with first diode, second diode.
The beneficial effect of the utility model receiver front end microstrip filter is: 1, multifrequency point filtering, frequency is from 960MHz～1216 MHz, stepping 1MHz, totally 256 frequencies.2, differential loss is little, 2dB.3, thermal noise is little :-40dB.
Description of drawings
Fig. 1 is the structural representation of the utility model receiver front end microstrip filter.
Fig. 2 is the structural representation of variable capacitance diode in the utility model.
Among the figure, 1. prime preselection filter, 2. low noise amplifier, 3. back grade preselection filter, 4. band stop filter, 5. frequency mixer, 6. variable capacitance diode, 7. electric capacity, 8. first diode, 9. second diode, 10. microstrip line.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is elaborated.
The structure of the utility model receiver front end microstrip filter; As shown in Figure 1; Comprise the prime preselection filter 1, low noise amplifier 2, back level preselection filter 3, band stop filter 4, the frequency mixer 5 that link to each other successively, prime preselection filter 1 is connected with variable capacitance diode 6 jointly with back level preselection filter 3.
The structure of variable capacitance diode 6 is as shown in Figure 2; The two ends of the microstrip line 10 of little band plate connect prime preselection filter 1 and back level preselection filter 3 respectively; The electric capacity 7 that is provided with on the microstrip line 10 also is respectively arranged with first diode 8, second diode 9 at the two ends of electric capacity 7.
In the utility model receiver front end microstrip filter, the N of low noise amplifier 2
P≤1.5dB, G>=25dB ± 1dB.Prime preselection filter 1 requires passband wide, and Insertion Loss is little; Back level preselection filter 3 requires passband narrow, and band is outer to suppress big.For the image frequency that realizes 60dB suppresses, the mode that adopts band resistance microstrip filter to absorb is carried out.Because prime preselection filter 1 is an electrically tunable filter with back level preselection filter 3, therefore requires band stop filter 4 also can have electric conditioning function.So band stop filter 4 adopts little three joint band resistances of being with, and cooperates the form with variable capacitance diode 6 to realize electric conditioning function.Band stop filter 4 tuning range 2V-28V, 252 radio frequency channels of corresponding X/Y pattern respectively.Frequency mixer 5 adopts balanced mixer, and volume is little, and reliability is high, conversion loss＜7dB, isolation＞20dB.
The utility model receiver front end microstrip filter, the holding wire that receives carries out frequency-selecting through prime preselection filter 1, amplifies through low noise amplifier 2 again; Simultaneously white noise is suppressed; Carry out filtering through back level preselection filter 3 more afterwards, obtain through band stop filter 4 possible adjacent wave road (interference) signal being carried out filtering through the useful signal after amplifying; Get into frequency mixer 5 and local oscillation signal mixing afterwards, mixing output 63MHz intermediate-freuqncy signal.
Claims (2)
1. receiver front end microstrip filter; It is characterized in that; Comprise the prime preselection filter (1), low noise amplifier (2), back level preselection filter (3), band stop filter (4), the frequency mixer (5) that link to each other successively, prime preselection filter (1) is connected with variable capacitance diode (6) jointly with back level preselection filter (3).
2. receiver front end microstrip filter according to claim 1; It is characterized in that; Said variable capacitance diode (6) comprises microstrip line (10); The two ends of microstrip line (10) connect said prime preselection filter (1) and back level preselection filter (3) respectively, and said microstrip line (10) is provided with electric capacity (7), and the two ends of said electric capacity (7) also are respectively arranged with first diode (8), second diode (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203076201U CN202160173U (en) | 2011-08-23 | 2011-08-23 | Front-end micro-strip filter of receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203076201U CN202160173U (en) | 2011-08-23 | 2011-08-23 | Front-end micro-strip filter of receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202160173U true CN202160173U (en) | 2012-03-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203076201U Expired - Fee Related CN202160173U (en) | 2011-08-23 | 2011-08-23 | Front-end micro-strip filter of receiver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202160173U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110034770A (en) * | 2017-12-07 | 2019-07-19 | 英飞凌科技股份有限公司 | System and method for radio-frequency filter |
-
2011
- 2011-08-23 CN CN2011203076201U patent/CN202160173U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110034770A (en) * | 2017-12-07 | 2019-07-19 | 英飞凌科技股份有限公司 | System and method for radio-frequency filter |
| US11245381B2 (en) | 2017-12-07 | 2022-02-08 | Infineon Technologies Ag | System and method for a radio frequency filter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shaanxi Lingyun Technology Co.,Ltd. Assignor: Shaanxi Lingyun Technology Co., Ltd.|Shaanxi Lingyun Electrical Appliance Group Co., Ltd. Contract record no.: 2015610000092 Denomination of utility model: Front-end micro-strip filter of receiver Granted publication date: 20120307 License type: Exclusive License Record date: 20151030 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120307 Termination date: 20180823 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |