CN102193084B - Broadband equalizer capable of realizing cross cold standby of signals with high isolation - Google Patents
Broadband equalizer capable of realizing cross cold standby of signals with high isolation Download PDFInfo
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- CN102193084B CN102193084B CN2010102508570A CN201010250857A CN102193084B CN 102193084 B CN102193084 B CN 102193084B CN 2010102508570 A CN2010102508570 A CN 2010102508570A CN 201010250857 A CN201010250857 A CN 201010250857A CN 102193084 B CN102193084 B CN 102193084B
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Abstract
The invention discloses a broadband equalizer capable of realizing cross cold standby of signals with high isolation and relates to a microwave remote sensing technology. An equalizer circuit consists of two operational amplifiers, three resistors, two inductors and three capacitors, and is provided with a master input port, a standby input port and two video signal output ports. The broadband equalizer is applied to a radar receiver; and the inband fatnesses of master-standby video signals are adjusted respectively, and the cross cold standby of the master-standby video signals with high isolation is realized. The broadband equalizer has the characteristics of simple use, convenience in debugging and high reliability, and is suitable for practical application of engineering.
Description
Technical field
The invention belongs to the microwave remote sensing technique application, is a kind ofly both can regulate active and standby flatness in signal band respectively, can realize the wideband balance device circuit of the intersection cold standby of active and standby signal high-isolation again.
Background technology
In radar receiver, very high to the inband flatness requirement, can in receiver, design balance device (see figure 1) regulate inband flatness usually.In the spaceborne radar receiver, require very high system reliability again, therefore can adopt active and standby output signal cross cold standby circuit.This intersection cold standby circuit is realized (see figure 2) by two reverse cascades of power splitter usually.Evener and active and standby output signal cross cold standby circuit are two functional modules independently in the receiver; The workload of debugging respectively is big and be unfavorable for that the miniaturization of receiver develops; Simultaneously; The two-way output sigtnal interval of the intersection cold standby circuit of being realized by the reverse cascades of two power splitters is little from degree, phase mutual interference easily.
Summary of the invention
The wideband balance device that the present invention seeks to disclose a kind of isolation height and realize the signal cross cold standby; Can realize the function of evener and active and standby output signal cross cold standby circuit simultaneously; The simplified receiver circuit; Make debugging simple, and can improve the isolation that intersects between cold standby circuit two-way output signal.
For achieving the above object, technical solution of the present invention is:
A kind of isolation is high and realize the wideband balance device of signal cross cold standby, and it has also realized the intersection cold standby of active and standby signal high-isolation when regulating active and standby flatness in signal band respectively;
This wideband balance device comprises two operational amplifiers, three resistance, two inductance and three electric capacity, is divided into one main one and is equipped with two input ports and two VT mouths; Wherein,
The primary input signal is through operational amplifier (N1) back and resistance (R1) cascade; Be equipped with input signal through operational amplifier (N2) back and resistance (R2) cascade; Be connected inductance (L1) and inductance (L2) respectively behind resistance (R1) and resistance (R2) short circuit; Electric capacity (C1) and resistance (R3) are connected in parallel on the output terminal of inductance (L1) and inductance (L2); Inductance (L1) and electric capacity (C2) cascade; Inductance (L2) and electric capacity (C3) cascade; Electric capacity (C2) and output port (1) cascade; Electric capacity (C3) and output port (2) cascade.
Described isolation is high and realize the wideband balance device of signal cross cold standby, and it regulates cascade resistance (R1, R2) behind operational amplifier to regulate the signal flatness in the passband; Will certainly change the full gain of receiver when regulating resistance, come the variation of compensated receiver full gain, the full gain of receiver is remained unchanged through the enlargement factor that changes operational amplifier (N1, N2).
Described isolation is high and realize that the wideband balance device of signal cross cold standby, its active and standby two paths of signals realize intersecting cold standby; Active and standby two paths of signals does not power up simultaneously; Be that equalizer circuit one main is equipped with two input ports the signal input is not arranged simultaneously; But no matter be that the primary input port has the signal input or is equipped with input port the signal input is arranged, two output ports have signal output always and do not disturb mutually.
Described isolation is high and realize the wideband balance device of signal cross cold standby, and it regulates inductance (L1, L2) and electric capacity (C1), to occur the frequency of maximum isolation degree between change output port (1) and the output port (2); Regulate resistance (R3) to change the size of isolation between output port (1) and the output port (2).
The invention has the beneficial effects as follows: the present invention is applied in the radar receiver, when regulating active and standby vision signal inband flatness respectively, has also realized the intersection cold standby of active and standby vision signal high-isolation.The present invention have use simple, debugging is convenient, high reliability features.Be applicable to the practical application of engineering.
Description of drawings
Fig. 1 is the circuit theory diagrams of normally used evener;
Fig. 2 is the schematic diagram by the intersection cold standby circuit of two reverse cascades realizations of power splitter;
Fig. 3 is a kind of isolation height of the present invention and the wideband balance device circuit theory diagrams of realizing the signal cross cold standby;
Fig. 4 is a kind of isolation height of the present invention and realizes the influence synoptic diagram of the wideband balance device of signal cross cold standby to signal flatness in the passband;
Fig. 5 is the isolation synoptic diagram between a kind of isolation height of the present invention and wideband balance device two output end signals of realizing the signal cross cold standby.
Embodiment
As shown in Figure 3, be a kind of isolation height of the present invention and the circuit diagram of realizing the wideband balance device of signal cross cold standby, the primary input signal passes through behind the operational amplifier N1 and resistance R 1 cascade; Be equipped with behind the input signal process operational amplifier N2 and resistance R 2 cascades; Be connected inductance L 1 and inductance L 2 behind resistance R 1 and resistance R 2 short circuits respectively; Capacitor C 1 and resistance R 3 are connected in parallel on the output terminal of inductance L 1 and inductance L 2; Inductance L 1 and capacitor C 2 cascades; Inductance L 2 and capacitor C 3 cascades; Capacitor C 2 and 1 cascade of VT mouth; Capacitor C 3 and 2 cascades of VT mouth.
During the circuit operate as normal, regulate resistance R 1 and can regulate the flatness in the main signal passband, regulate resistance R 2 and can regulate the interior flatness of signal passband fully; Regulate resistance R 1 (resistance R 2) and will certainly change the receiver main path signal full gain of (being equipped with the road signal); Come the variation of compensated receiver main path signal (being equipped with the road signal) full gain through the enlargement factor that changes operational amplifier N1 (N2), the full gain of receiver main path signal (being equipped with the road signal) is remained unchanged; Regulate inductance L 1, L2 and capacitor C 1, can change the frequency that occurs the maximum isolation degree between output port 1 and the output port 2; Adjusting resistance R 3 can change the size of isolation between output port 1 and the output port 2; Main signal and input simultaneously of signal fully, no matter but be main signal input or signal input fully, output port 1 and output port 2 all have signal output, realize the intersection cold standby of active and standby signal.
In the present invention, N1 and N2 select AD8001 for use; R1, R2 select 80 Ω for use; R3 selects 100 Ω for use; L1, L2 select 150nH for use; C1 selects 18pF for use; C2, C3 select 0.47uF for use.
According to embodiments of the invention, the cascade resistance behind the adjusting operational amplifier can be regulated the signal flatness in the passband, sees Fig. 4; Will certainly change the full gain of receiver when regulating resistance, come the variation of compensated receiver full gain, the full gain of receiver is remained unchanged through the enlargement factor that changes operational amplifier; Active and standby signal has also been realized the intersection cold standby, and has improved the isolation between two-way output signal, sees Fig. 5.
Claims (4)
1. an isolation is high and realize it is characterized in that the wideband balance device of signal cross cold standby: when regulating active and standby vision signal inband flatness respectively, also realized the intersection cold standby of active and standby vision signal high-isolation;
This wideband balance device comprises two operational amplifiers, three resistance, two inductance and three electric capacity, is divided into one main one and is equipped with two input ports and two output ports; Wherein:
The primary input signal passes through behind the operational amplifier N1 and resistance R 1 cascade; Be equipped with behind the input signal process operational amplifier N2 and resistance R 2 cascades; Be connected inductance L 1 and inductance L 2 behind resistance R 1 and resistance R 2 short circuits respectively; Capacitor C 1 and resistance R 3 are connected in parallel on the output terminal of inductance L 1 and inductance L 2; Inductance L 1 and capacitor C 2 cascades; Inductance L 2 and capacitor C 3 cascades; Capacitor C 2 and output port 1 cascade; Capacitor C 3 and output port 2 cascades.
2. isolation according to claim 1 is high and realize it is characterized in that the wideband balance device of signal cross cold standby: regulate cascade resistance R 1 behind the operational amplifier, R2 to regulate the signal flatness in the passband; Will certainly change the full gain of receiver when regulating resistance, come the variation of compensated receiver full gain, the full gain of receiver is remained unchanged through the enlargement factor that changes operational amplifier N1, N2.
3. isolation according to claim 1 is high and realize it is characterized in that the wideband balance device of signal cross cold standby: active and standby two paths of signals realizes intersecting cold standby; Active and standby two paths of signals does not power up simultaneously; Be that equalizer circuit one main is equipped with two input ports the signal input is not arranged simultaneously; But no matter be that the primary input port has the signal input or is equipped with input port the signal input is arranged, two output ports have signal output always and do not disturb mutually.
4. isolation according to claim 1 is high and realize it is characterized in that the wideband balance device of signal cross cold standby: regulate inductance L 1, L2 and capacitor C 1, to change the frequency that occurs the maximum isolation degree between output port 1 and the output port 2; Regulate resistance R 3 to change the size of isolation between output port 1 and the output port 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102508570A CN102193084B (en) | 2010-03-18 | 2010-08-10 | Broadband equalizer capable of realizing cross cold standby of signals with high isolation |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010126469.1 | 2010-03-18 | ||
| CN201010126469 | 2010-03-18 | ||
| CN2010102508570A CN102193084B (en) | 2010-03-18 | 2010-08-10 | Broadband equalizer capable of realizing cross cold standby of signals with high isolation |
Publications (2)
| Publication Number | Publication Date |
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| CN102193084A CN102193084A (en) | 2011-09-21 |
| CN102193084B true CN102193084B (en) | 2012-09-26 |
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| CN2010102508570A Expired - Fee Related CN102193084B (en) | 2010-03-18 | 2010-08-10 | Broadband equalizer capable of realizing cross cold standby of signals with high isolation |
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| CN105259551B (en) * | 2015-11-26 | 2019-03-22 | 上海无线电设备研究所 | Satellite-borne microwave radar system grade and channel level redundancy cold standby structure |
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| US7105949B2 (en) * | 2004-01-22 | 2006-09-12 | Delta Electronics, Inc. | Emergent power supply system and method of achieving input current balance in such system |
| CN201274005Y (en) * | 2008-09-28 | 2009-07-15 | 尹建国 | Automatic cold backup energy-saving program controller |
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Granted publication date: 20120926 Termination date: 20180810 |