CN210380792U - Double-tuning frequency hopping filter - Google Patents
Double-tuning frequency hopping filter Download PDFInfo
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- CN210380792U CN210380792U CN201921713685.9U CN201921713685U CN210380792U CN 210380792 U CN210380792 U CN 210380792U CN 201921713685 U CN201921713685 U CN 201921713685U CN 210380792 U CN210380792 U CN 210380792U
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Abstract
The utility model relates to a double-tuning frequency hopping filter, which comprises a frequency hopping filter and a digital control circuit board, wherein the filter module comprises a first matching inductor, a first tuning inductor, a coupling inductor, a second matching inductor and a second tuning inductor which are connected in sequence, and the first tuning inductor and the second tuning inductor are also electrically connected with the digital control circuit board; the digital control circuit board comprises a capacitor array circuit, a switch driving circuit and a relay switch circuit; the capacitor array circuit is electrically connected with the first tuning inductor and the second tuning inductor respectively, the capacitor array circuit is also electrically connected with the switch driving circuit, and the relay switch circuit is electrically connected with the coupling inductor.
Description
Technical Field
The field relates to the technical field of communication, in particular to a double-tuned frequency hopping filter.
Background
The filter is a filter circuit consisting of a capacitor, an inductor and a resistor. The filter can effectively filter the frequency point of the specific frequency in the power line or the frequencies except the frequency point to obtain a power signal of the specific frequency or eliminate the power signal of the specific frequency.
The frequency hopping filter is one of filters, in the existing frequency hopping filter, a resonator and a coupler are fixed, and the design of the frequency hopping filter is completed by changing a tuning capacitor. However, in a wider frequency range, the mode of fixing the coupler and the resonator is difficult to ensure the optimization of the comprehensive performance of the frequency hopping filter, especially in a high frequency band and a low frequency band, the comprehensive performance of the frequency hopping filter is adjusted only by singly changing the tuning capacitor, so that the performance of the whole frequency band is greatly fluctuated, and the performance is seriously deteriorated especially at high and low frequency points, for example, the problems of increased insertion loss, poor standing wave, poor suppression and the like can occur.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a double tuned frequency hopping filter is provided to solve the frequency hopping filter and worsen the problem at the frequency point of high band and low band.
The utility model discloses a following technical means realizes solving above-mentioned technical problem:
a double-tuning frequency hopping filter comprises a filter module and a digital control circuit board, wherein the filter module comprises a first matching inductor, a first tuning inductor, a coupling inductor, a second matching inductor and a second tuning inductor which are connected in sequence,
the first tuning inductor and the second tuning inductor are also electrically connected with the digital control circuit board;
the digital control circuit board comprises a capacitor array circuit, a switch driving circuit and a relay switch circuit;
the capacitor array circuit is electrically connected with the first tuning inductor and the second tuning inductor respectively, the capacitor array circuit is also electrically connected with the switch driving circuit, and the relay switch circuit is electrically connected with the coupling inductor.
The first tuning inductor and the capacitor array circuit form a first resonant circuit, the second tuning inductor and the capacitor array circuit form a second resonant circuit, and the coupling of the first resonant circuit and the second resonant circuit is changed through controlling the coupling inductor, so that the stability and optimization of the overall performance in a full frequency band are realized.
As a further aspect of the present invention: the circuit in the filter module comprises an inductor L1, an inductor L2, an inductor L3, an inductor L4, an inductor L5, an inductor L6, an inductor L7, an inductor L8, an adjustable capacitor C1, an adjustable capacitor C2, a switch K1 and a relay switch circuit, wherein,
one end of the inductor L1 is connected to an external device for inputting a signal, the other end of the inductor L1 is connected to the inductor L2, one end of the inductor L2 is grounded, the other end of the inductor L2 is connected to one end of the inductor L3, the inductor L2 is connected in parallel to the adjustable capacitor C1, the other end of the inductor L3 is electrically connected to one end of the inductor L4 and one end of the inductor L6, the other end of the inductor L4 is electrically connected to one end of the inductor L5 and the relay switch circuit, the other end of the inductor L5 is grounded, the other end of the inductor L6 is electrically connected to one end of the adjustable capacitor C2, and the other end of the adjustable capacitor C2 is electrically connected to one end of the inductor L2; the inductor L7 is connected in parallel with the adjustable capacitor C2, the inductor L7 is further electrically connected with one end of the inductor L8, and the other end of the inductor L8 is connected with external equipment and used for outputting signals.
As a further aspect of the present invention: the switching circuit of the relay comprises a resistor R1, a resistor R2, a resistor R3, a coil R4, a triode Q1, a triode Q2, a diode D1, a diode D2, an inductor L9 and a switch K1, wherein,
one end of the resistor R1 is connected with the main control chip, DO signals are input through external control equipment, the other end of the resistor R1 is electrically connected with the base electrode of the triode Q1, the collector electrode of the triode Q1 is electrically connected with one end of the resistor R2, the other end of the resistor R2 is electrically connected with an external power supply VCC1, the emitter electrode of the triode Q1 is electrically connected with the base electrode of the triode Q2, the base electrode and the emitter electrode of the triode Q2 are respectively connected with two ends of the resistor R3,
the collector of the triode Q2 is electrically connected with the anode of the diode D1, and the cathode of the diode D1 is electrically connected with one end of the inductor L9;
the other end of the inductor L1 is connected to a power supply VCC, one end of a switch K1 in the relay is electrically connected with the anode of a diode D2, and the cathode of the diode D2 is grounded;
the diode D1 is connected in parallel with the coil R4 in the relay, and one end of the switch K1 in the relay is also electrically connected with the inductor L4.
As a further aspect of the present invention: the switch driving circuit comprises a resistor R5, a resistor R6, a resistor R7, a resistor R8, a MOS transistor Q3, a double triode Q4 and a diode D3, wherein a 1 st pin of the double triode Q4 is grounded, a 2 nd pin of the double triode Q4 is electrically connected with one end of a resistor R7, the other end of the resistor R7 is electrically connected with one end of a resistor R8, the other end of the resistor R8 is electrically connected with a grid electrode of an MOS transistor Q3, a source electrode of the MOS transistor is grounded, a drain electrode of the MOS transistor is electrically connected with a 4 th pin of the double triode Q4, and a drain electrode of the MOS transistor is further connected with a capacitor array circuit;
and the source of MOS pipe still with diode D3's positive pole electric connection, diode D3's negative pole and MOS pipe's drain electrode electric connection, the 3 rd pin of two triode Q4 and resistance R6's one end electric connection, resistance R6's the other end and resistance R5's one end electric connection, resistance R5's the other end respectively with two triode Q4's the 5 th pin, the 6 th pin electric connection.
As a further aspect of the present invention: the model of the double triode Q4 is NX7002 AKS; the MOS tube Q3 is 2N 7002K-T1-E3.
As a further aspect of the present invention: the capacitor array circuit comprises a resistor R9, a resistor R10, a resistor R11, a resistor R12, a capacitor C3, a capacitor C4, a capacitor C5 and a double diode Q5, wherein a No. 3 pin of the double diode is electrically connected with one end of the resistor R10, and the other end of the resistor R10 is electrically connected with an external power supply VCC;
the 2 nd pin of the double diode Q5 is electrically connected with one end of the resistor R11, and the other end of the resistor R11 is electrically connected with the 4 th pin of the double triode Q4.
The 1 st pin of the double diode Q5 is electrically connected with one end of a capacitor C5, and the other end of the capacitor C5 is electrically connected with a tuning inductor in the filter module to play a tuning role; the 1 st pin of the double diode Q5 is electrically connected with one end of the resistor R9 and one end of the resistor R13 respectively,
the other end of the resistor R9 is electrically connected with the 3 rd pin of the double diode Q5 and one end of the capacitor C3, the other end of the capacitor C3 is grounded, the other end of the resistor R12 is electrically connected with the 2 nd pin of the double triode and one end of the capacitor C4 respectively, and the other end of the capacitor C4 is grounded.
The utility model has the advantages that:
1. the utility model discloses in, first tuned inductance constitutes first resonant circuit with capacitor array circuit, and first resonant circuit is constituteed with capacitor array circuit to the tuned inductance of second, through the control to the coupling inductor, changes first resonant circuit and second resonant circuit's coupling, realizes stability and optimization of full frequency channel internal performance, prevents the undulant condition, avoids appearing insertion loss increase, standing wave variation, suppression variation scheduling problem.
2. In the utility model, the adjustable capacitor C1 and the adjustable capacitor C2 can change the resonance tuning of the frequency points of the first resonance circuit and the second resonance circuit, when the frequency hopping filter hops to the low end of the frequency, the switching circuit of the relay is closed, the inductor L5 is not connected to the circuit, and the coupling inductance is reduced; when the frequency jumps to the high end of the frequency, the switching circuit of the relay is switched off, the inductor L5 is connected into the circuit, and the coupling inductor is increased; the stability and optimization of the overall performance in the full frequency band are realized.
Drawings
Fig. 1 is a block diagram of the present invention.
Fig. 2 is a schematic circuit diagram of the filter module of the present invention.
Fig. 3 is a circuit principle intention of the relay switch module of the present invention.
Fig. 4 is a schematic circuit diagram of the switch driving circuit of the present invention.
Fig. 5 is a schematic circuit diagram of the capacitor array circuit of the present invention.
Detailed Description
To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a block diagram of the present invention; a double-tuning frequency hopping filter comprises a filter module and a digital control circuit board, wherein the filter module comprises a first matching inductor, a first tuning inductor, a coupling inductor, a second matching inductor and a second tuning inductor which are connected in sequence,
the first tuning inductor and the second tuning inductor are also electrically connected with the digital control circuit board;
the digital control circuit board comprises a capacitor array circuit, a switch driving circuit and a relay switch circuit;
the capacitor array circuit is electrically connected with the first tuning inductor and the second tuning inductor respectively, the capacitor array circuit is also electrically connected with the switch driving circuit, and the relay switch circuit is electrically connected with the coupling inductor.
Referring to fig. 2, fig. 2 is a schematic circuit diagram of a filter module according to the present invention; wherein, the circuit of the filter module comprises an inductor L1, an inductor L2, an inductor L3, an inductor L4, an inductor L5, an inductor L6, an inductor L7, an inductor L8, an adjustable capacitor C1, an adjustable capacitor C2 and a relay switch circuit, wherein,
one end of the inductor L1 is connected to an external device for inputting a control signal, the other end of the inductor L1 is connected to the inductor L2, one end of the inductor L2 is grounded, the other end of the inductor L2 is connected to one end of the inductor L3, the inductor L2 is connected in parallel to the adjustable capacitor C1, the other end of the inductor L3 is electrically connected to one end of the inductor L4 and one end of the inductor L6, the other end of the inductor L4 is electrically connected to one end of the inductor L5 and the relay switch circuit, the other end of the inductor L5 is grounded, the other end of the inductor L6 is electrically connected to one end of the adjustable capacitor C2, and the other end of the adjustable capacitor C2 is electrically connected to one end of the inductor L2; the inductor L7 is connected in parallel with the adjustable capacitor C2, the inductor L7 is further electrically connected with one end of the inductor L8, and the other end of the inductor L8 is connected with external equipment and used for outputting signals.
Preferably, in this embodiment, the inductor L1 is connected to the middle of the inductor L2, and the inductor L8 is connected to the middle of the inductor L7.
Referring to fig. 3, fig. 3 is a schematic circuit diagram of a relay switch module according to the present invention; the switching circuit of the relay comprises a resistor R1, a resistor R2, a resistor R3, a coil R4, a triode Q1, a triode Q2, a diode D1, a diode D2, an inductor L9 and a switch K1, wherein,
one end of the resistor R1 is connected with the main control chip for outputting a corresponding control signal, the main control chip is also arranged on the circuit board, the other end of the resistor R1 is electrically connected with the base of the triode Q1, the collector of the triode Q1 is electrically connected with one end of the resistor R2, the other end of the resistor R2 is electrically connected with an external power supply VCC1, and the external power supply VCC1 is used for supplying power; an emitting electrode of the triode Q1 is electrically connected with a base electrode of the triode Q2, a base electrode and an emitting electrode of the triode Q2 are respectively connected with two ends of the resistor R3, a collecting electrode of the triode Q2 is electrically connected with an anode of the diode D1, and a cathode of the diode D1 is electrically connected with one end of the inductor L9;
the other end of the inductor L1 is connected to a power supply VCC, one end of a switch K1 in the relay is electrically connected with the anode of a diode D2, and the cathode of the diode D2 is grounded;
the diode D1 is connected in parallel with the coil R4 in the relay, and one end of the switch K1 in the relay is also electrically connected with the inductor L4.
Referring to fig. 4, fig. 4 is a schematic circuit diagram of a switch driving circuit according to the present invention; the switch driving circuit comprises a resistor R5, a resistor R6, a resistor R7, a resistor R8, a MOS transistor Q3, a double triode Q4 and a diode D3, wherein a 1 st pin of the double triode Q4 is grounded, a 2 nd pin of the double triode Q4 is electrically connected with one end of a resistor R7, the other end of the resistor R7 is electrically connected with one end of a resistor R8, the other end of the resistor R8 is electrically connected with a grid electrode of an MOS transistor Q3, a source electrode of the MOS transistor is grounded, a drain electrode of the MOS transistor is electrically connected with a 4 th pin of the double triode Q4, and a drain electrode of the MOS transistor is further connected with a capacitor array circuit;
and the source of MOS pipe still with diode D3's positive pole electric connection, diode D3's negative pole and MOS pipe's drain electrode electric connection, the 3 rd pin of two triode Q4 and resistance R6's one end electric connection, resistance R6's the other end and resistance R5's one end electric connection, resistance R5's the other end respectively with two triode Q4's the 5 th pin, the 6 th pin electric connection.
In this embodiment, the model of the double triode Q4 is NX7002 AKS; the MOS tube Q3 is 2N 7002K-T1-E3.
Referring to fig. 5, fig. 5 is a schematic circuit diagram of a capacitor array circuit according to the present invention; the capacitor array circuit may be a plurality of sets, and only one set is provided in this embodiment for detailed description.
The capacitor array circuit comprises a resistor R9, a resistor R10, a resistor R11, a resistor R12, a capacitor C3, a capacitor C4, a capacitor C5 and a double diode Q5, wherein a No. 3 pin of the double diode is electrically connected with one end of the resistor R10, and the other end of the resistor R10 is electrically connected with an external power supply VCC;
the 2 nd pin of the double diode Q5 is electrically connected with one end of the resistor R11, and the other end of the resistor R11 is electrically connected with the 4 th pin of the double triode Q4.
The 1 st pin of the double diode Q5 is electrically connected with one end of a capacitor C5, and the other end of the capacitor C5 is electrically connected with a tuning inductor in the filter module to play a role in adjustment; the 1 st pin of the double diode Q5 is electrically connected with one end of the resistor R9 and one end of the resistor R13 respectively,
the other end of the resistor R9 is electrically connected with the 3 rd pin of the double diode Q5 and one end of the capacitor C3, the other end of the capacitor C3 is grounded, the other end of the resistor R12 is electrically connected with the 2 nd pin of the double triode and one end of the capacitor C4 respectively, and the other end of the capacitor C4 is grounded.
The working principle is as follows:
the utility model discloses in, first tuned inductance constitutes first resonant circuit with the capacitor array circuit, second tuned inductance constitutes the second resonant circuit with the capacitor array circuit, adjustable electric capacity C1, adjustable electric capacity C2 can change the resonance tuning at first resonant circuit and second resonant circuit frequency point, control through the continuing electrical apparatus switch circuit, the disconnection of accomplishing inductance L5 is the loading still, change the coupling of first resonant circuit and second resonant circuit, realize stability and the optimization of wholeness ability in full frequency channel.
When the frequency hopping filter jumps to the low end of the frequency, the switching circuit of the relay is closed, the inductor L5 is not connected with the circuit, and the coupling inductance is reduced; when the frequency jumps to the high end of the frequency, the switching circuit of the relay is disconnected, the inductor L5 is connected into the circuit, and the coupling inductor is increased.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (7)
1. A double-tuning frequency hopping filter is characterized by comprising a filter module and a digital control circuit board, wherein the filter module comprises a first matching inductor, a first tuning inductor, a coupling inductor, a second matching inductor and a second tuning inductor which are sequentially connected, the first tuning inductor and the second tuning inductor are also electrically connected with the digital control circuit board,
the digital control circuit board comprises a capacitor array circuit, a switch driving circuit and a relay switch circuit;
the capacitor array circuit is electrically connected with the first tuning inductor and the second tuning inductor respectively, the capacitor array circuit is also electrically connected with the switch driving circuit, and the relay switch circuit is electrically connected with the coupling inductor.
2. The double-tuned frequency hopping filter according to claim 1, wherein the circuit of the filter module comprises an inductor L1, an inductor L2, an inductor L3, an inductor L4, an inductor L5, an inductor L6, an inductor L7, an inductor L8, an adjustable capacitor C1, an adjustable capacitor C2, a relay switch circuit, wherein,
one end of the inductor L1 is connected to an external device, the other end of the inductor L1 is connected to the inductor L2, one end of the inductor L2 is grounded, the other end of the inductor L2 is connected to one end of the inductor L3, the inductor L2 is connected in parallel to the adjustable capacitor C1, the other end of the inductor L3 is electrically connected to one end of the inductor L4 and one end of the inductor L6, the other end of the inductor L4 is electrically connected to one end of the inductor L5 and the relay switch circuit, and the other end of the inductor L5 is grounded;
the other end of the inductor L6 is electrically connected with one end of an adjustable capacitor C2, and the other end of the adjustable capacitor C2 is electrically connected with one end of an inductor L2; the inductor L7 is connected in parallel with the adjustable capacitor C2, the inductor L7 is further electrically connected with one end of the inductor L8, and the other end of the inductor L8 is connected with external equipment.
3. The double-tuned frequency hopping filter according to claim 2, wherein said inductor L1 is connected to the middle of an inductor L2, and said inductor L8 is connected to the middle of an inductor L7.
4. The double-tuned frequency hopping filter according to any one of claims 1 to 2, wherein said charger switching circuit comprises a resistor R1, a resistor R2, a resistor R3, a transistor Q1, a transistor Q2, a diode D1, a diode D2, an inductor L9, a charger, wherein,
one end of the resistor R1 is connected with the main control chip, the other end of the resistor R1 is electrically connected with the base electrode of the triode Q1, the collector electrode of the triode Q1 is electrically connected with one end of the resistor R2, and the other end of the resistor R2 is electrically connected with an external power supply VCC 1;
the emitter of the triode Q1 is electrically connected with the base of the triode Q2, and the base and the emitter of the triode Q2 are respectively connected with two ends of the resistor R3;
the collector of the triode Q2 is electrically connected with the anode of the diode D1, and the cathode of the diode D1 is electrically connected with one end of the inductor L9;
the other end of the inductor L1 is connected to a power supply VCC, one end of a switch K1 in the relay is electrically connected with the anode of a diode D2, and the cathode of the diode D2 is grounded;
the diode D1 is connected in parallel with the coil R4 in the relay, and one end of the switch K1 in the relay is also electrically connected with the inductor L4.
5. The double-tuned frequency-hopping filter according to claim 1, wherein the switch driving circuit comprises a resistor R5, a resistor R6, a resistor R7, a resistor R8, a MOS transistor Q3, a triode Q4, and a diode D3, wherein,
a 1 st pin of the double triode Q4 is grounded, a 2 nd pin of the double triode Q4 is electrically connected with one end of a resistor R7, the other end of the resistor R7 is electrically connected with one end of a resistor R8, the other end of the resistor R8 is electrically connected with a grid electrode of an MOS tube Q3, a source electrode of the MOS tube is grounded, a drain electrode of the MOS tube is electrically connected with a 4 th pin of the double triode Q4, and the drain electrode of the MOS tube is further connected with a capacitor array circuit;
the source electrode of the MOS tube is also electrically connected with the anode of a diode D3, the cathode of the diode D3 is electrically connected with the drain electrode of the MOS tube, and the 3 rd pin of the double triode Q4 is electrically connected with one end of a resistor R6;
the other end of the resistor R6 is electrically connected with one end of the resistor R5, and the other end of the resistor R5 is electrically connected with the 5 th pin and the 6 th pin of the triode Q4 respectively.
6. The double-tuned frequency-hopping filter according to claim 5, wherein said dual transistor Q4 is of type NX7002 AKS; the MOS tube Q3 is 2N 7002K-T1-E3.
7. The double-tuned frequency hopping filter according to any one of claims 5 to 6, wherein the capacitor array circuit comprises a resistor R9, a resistor R10, a resistor R11, a resistor R12, a capacitor C3, a capacitor C4, a capacitor C5 and a double diode Q5, the 3 rd pin of the double diode is electrically connected with one end of the resistor R10, and the other end of the resistor R10 is electrically connected with an external power VCC;
a 2 nd pin of the double diode Q5 is electrically connected with one end of a resistor R11, and the other end of the resistor R11 is electrically connected with a 4 th pin of a double triode Q4;
the 1 st pin of the double diode Q5 is electrically connected with one end of a capacitor C5, and the other end of the capacitor C5 is electrically connected with a tuning inductor in the filter module to play a role in adjustment; the 1 st pin of the double diode Q5 is electrically connected with one end of a resistor R9 and one end of a resistor R13 respectively;
the other end of the resistor R9 is electrically connected with the 3 rd pin of the double diode Q5 and one end of the capacitor C3, the other end of the capacitor C3 is grounded, the other end of the resistor R12 is electrically connected with the 2 nd pin of the double triode and one end of the capacitor C4 respectively, and the other end of the capacitor C4 is grounded.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921713685.9U CN210380792U (en) | 2019-10-14 | 2019-10-14 | Double-tuning frequency hopping filter |
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| CN201921713685.9U CN210380792U (en) | 2019-10-14 | 2019-10-14 | Double-tuning frequency hopping filter |
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| CN210380792U true CN210380792U (en) | 2020-04-21 |
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