CN210297640U - C-band voltage-controlled oscillator - Google Patents
C-band voltage-controlled oscillator Download PDFInfo
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- CN210297640U CN210297640U CN201921750365.0U CN201921750365U CN210297640U CN 210297640 U CN210297640 U CN 210297640U CN 201921750365 U CN201921750365 U CN 201921750365U CN 210297640 U CN210297640 U CN 210297640U
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Abstract
The utility model provides a C-band voltage-controlled oscillator, belonging to the technical field of microwave communication, which comprises an oscillating circuit, a tuning circuit, an amplifying circuit, a 2-frequency doubling circuit and a high-pass filter circuit; one end of the oscillating circuit is connected to the tuning circuit, and the other end of the oscillating circuit is connected to the amplifying circuit; the other end of the amplifying circuit is connected to the frequency doubling circuit 2; the other end of the frequency doubling circuit 2 is connected with the high-pass filter circuit; and the other end of the high-pass filter circuit is used for connecting a load circuit. The utility model provides a C wave band voltage controlled oscillator circuit structure is simple, the cost is lower.
Description
Technical Field
The utility model relates to a microwave communication technical field especially relates to a C wave band voltage controlled oscillator.
Background
With the rapid development of the communication field, the demand for electronic devices is higher and higher, and a Voltage Controlled Oscillator (VCO) is one of the very important components in the radio frequency communication system. A voltage controlled oscillator refers to an oscillating circuit in which the output frequency corresponds to the input control voltage, i.e., the output frequency is a function of the input signal voltage. The frequency synthesizer is mainly applied to phase-locked loops and frequency synthesizers, is used for realizing accurate reference frequency, and is very important to the performance of a communication system.
However, the integrated voltage-controlled oscillation chip is mainly used in the market at present, and although the integrated voltage-controlled oscillation chip has superior performance in all aspects, the cost is too high.
Disclosure of Invention
Therefore, the utility model aims at providing a C wave band voltage controlled oscillator, simple structure, cost are lower.
The above technical purpose of the present invention can be achieved by the following technical solutions:
a C-band voltage-controlled oscillator comprises an oscillating circuit, a tuning circuit, an amplifying circuit, a 2 frequency doubling circuit and a high-pass filter circuit; one end of the oscillating circuit is connected with the tuning circuit, and the other end of the oscillating circuit is connected with the amplifying circuit; the other end of the amplifying circuit is connected with the frequency doubling circuit 2; 2, the other end of the frequency doubling circuit is connected with the high-pass filter circuit; the other end of the high-pass filter circuit is used for connecting a load circuit.
Preferably, the oscillating circuit includes a first triode, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor and a first resistor, wherein one end of the first capacitor is connected to the tuning circuit, and the other end of the first capacitor is connected to the base of the first triode, one end of the second capacitor is connected to the collector of the first triode, and the other end of the second capacitor is grounded, the collector of the first triode is further connected to the amplifying circuit, one end of the third capacitor is connected to the base of the first triode, and the other end of the third capacitor is connected to one end of the fourth capacitor, and the other end of the fourth capacitor is grounded, one end of the fifth capacitor is connected to the emitter of the first triode, and the other end of the fifth capacitor is connected to the amplifying circuit, one end of the first resistor is connected to the emitter of the first triode.
Preferably, the tuning circuit comprises a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a first microstrip line, an inductor and a varactor diode; wherein the sixth capacitor one end is connected in the one end of first capacitor, the other end is connected in the one end of seventh capacitor, varactor's positive ground, the negative pole is connected in the other end of seventh capacitor, inductance one end is connected between varactor and seventh capacitor, the other end is used for connecting the regulation power, eighth capacitor one end is connected between inductance and regulation power, the other end ground, ninth capacitor one end is connected between sixth capacitor and seventh capacitor, the other end ground, first microstrip line one end is connected between sixth capacitor and seventh capacitor, the other end ground.
Preferably, the amplifying circuit comprises a second resistor, a third resistor, a fourth resistor and a second triode, one end of the second resistor is grounded, the other end of the second resistor is connected to one end of the third resistor, one end of the fourth resistor is used for connecting a power supply, the other end of the fourth resistor is connected to the other end of the third resistor, a base of the second triode is connected between the third resistor and the fourth resistor, the base of the second triode is further connected to one end of the fifth capacitor, an emitter of the second triode is connected to a collector of the first triode, and the collector of the second triode is connected with the frequency doubling circuit 2.
Preferably, the 2-frequency multiplier circuit comprises a third triode, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a fifth resistor, a sixth resistor and a second microstrip line; one end of a tenth capacitor is connected to the collector of the second triode, the other end of the tenth capacitor is connected to the base of the third triode, the collector of the third triode is connected to the high-pass filter circuit, the emitter is grounded, one end of a fifth resistor is connected to the base of the third triode, the other end of the fifth resistor is connected to the emitter of the third triode, one end of a sixth resistor is connected to the base of the third triode, the other end of the sixth resistor is connected to the power supply, one end of an eleventh capacitor is connected between the sixth resistor and the power supply, the other end of the eleventh capacitor is grounded, one end of a second microstrip line is connected between the eleventh capacitor and the power supply, the other end of the second microstrip line is connected to the collector of the.
Preferably, the high-pass filter circuit comprises a thirteenth capacitor, a third microstrip line and a fourth microstrip line; one end of a thirteenth capacitor is connected to the collector of the third triode, the other end of the thirteenth capacitor is connected to the third microstrip line, the other end of the third microstrip line is grounded, one end of a fourth microstrip line is connected to the collector of the third triode, the other end of the fourth microstrip line is connected between the sixth resistor and the eleventh capacitor, and a connection node of the thirteenth capacitor and the third microstrip line is used for being connected with a load circuit.
The utility model provides a C wave band voltage controlled oscillator is through setting up oscillating circuit, tuned circuit. The frequency-multiplying circuit comprises an amplifying circuit, a frequency-multiplying circuit 2 and a high-pass filter, wherein a reference frequency signal is generated by an oscillating circuit and output to the amplifying circuit, the reference frequency of the reference frequency signal is adjusted by a tuning circuit in the generation process of the reference frequency signal, the reference frequency signal is amplified by the amplifying circuit and then output to the frequency-multiplying circuit 2, the frequency-multiplying circuit 2 outputs a frequency signal with the frequency within a C wave band, and the frequency signal is output to a load circuit through the high-pass filter circuit. The utility model provides a voltage-controlled oscillator can the output frequency in the frequency signal of C wave band, and circuit structure is simple, and the cost is lower and extensive applicability is general.
Drawings
Fig. 1 is a block diagram of a C-band voltage-controlled oscillator connected to a load circuit according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a C-band voltage-controlled oscillator according to an embodiment of the present invention.
The reference numerals in the figures are explained below:
1. a C-band voltage controlled oscillator; 11. an oscillation circuit; 12; a tuning circuit; 13. an amplifying circuit; 14. 2 a frequency multiplier circuit; 15. a high pass filter circuit.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
A C-band voltage-controlled oscillator is shown in FIG. 1. FIG. 1 shows a block diagram of a C-band voltage-controlled oscillator 1 connected with a load circuit. The C-band voltage-controlled oscillator 1 includes an oscillation circuit 11, a tuning circuit 12, an amplification circuit 133, a frequency-doubling 2 circuit 14, and a high-pass filter circuit 15. One end of the oscillation circuit 11 is connected to the tuning circuit 12, and the other end is connected to the amplifying circuit 133; the other end of the amplifier circuit 133 is connected to the frequency-2 multiplier circuit 14; the other end of the frequency 2 multiplier circuit 14 is connected to a high-pass filter circuit 15; the other end of the high pass filter circuit 15 is used for connecting a load circuit.
In the present embodiment, the reference frequency signal is generated by the oscillation circuit 11, wherein the tuning circuit 12 can adjust the reference frequency of the reference frequency signal generated by the oscillation circuit 11. The oscillation circuit 11 outputs the generated reference frequency signal to the amplification circuit 133 for signal amplification, the reference frequency signal is amplified and then output to the frequency doubling circuit 2 14, the frequency of the reference frequency signal is adjusted to be within the frequency range of the C-band by the frequency doubling circuit 2 14, the frequency doubling circuit 2 14 outputs the adjusted frequency signal to the high-pass filter circuit 15 to filter the low-frequency part of the frequency signal, and finally the frequency signal is output to the load circuit. The C-band voltage-controlled oscillator 1 in this embodiment can not only output a frequency signal with a frequency within the C band, but also has a very simple circuit structure, a low cost, and a very wide applicability compared with an integrated voltage-controlled oscillation chip.
Specifically, as shown in fig. 2, the oscillation circuit 11 includes a first transistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, and a first resistor. The first triode is a triode Q1, the first capacitor is a capacitor C1, the second capacitor is a capacitor C2, the third capacitor is a capacitor C3, the fourth capacitor is a capacitor C4, the fifth capacitor is a capacitor C5, and the first resistor is a resistor R1. One end of a capacitor C1 is connected to the tuning circuit 12, the other end of the capacitor C1 is connected to the base B of the transistor Q1, one end of a capacitor C2 is connected to the collector C of the transistor Q1, the other end of the capacitor C3625 is grounded, the collector C of the transistor Q1 is further connected to the amplifying circuit 133, one end of a capacitor C3 is connected to the base B of the transistor Q1, the other end of the capacitor C4 is connected to one end of the capacitor C4, the other end of the capacitor C5 is connected to the emitter E of the transistor Q1, the other end of the capacitor C5 is connected to the amplifying circuit 133, one end of a resistor R1 is connected to the emitter E of the transistor Q1.
The tuning circuit 12 includes a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a first microstrip line, an inductor, and a varactor. The sixth capacitor is a capacitor C6, the seventh capacitor is a capacitor C7, the eighth capacitor is a capacitor C8, the ninth capacitor is a capacitor C9, the first microstrip line is a microstrip line V1, the inductor is an inductor L1, and the varactor diode is a varactor diode D1. Capacitor C6 one end is connected in the one end of capacitor C1, the other end is connected in the one end of capacitor C7, varactor D1's positive ground, the negative pole is connected in the other end of capacitor C7, inductance L1 one end is connected between varactor D1 and capacitor C7, the other end is used for connecting regulation power VCC1, capacitor C8 one end is connected between inductance L1 and regulation power VCC1, the other end ground, capacitor C9 one end is connected between capacitor C6 and capacitor C7, the other end ground, microstrip line V1 one end is connected between capacitor C6 and capacitor C7, the other end ground. The voltage range of the output of the adjusting power supply VCC1 is 0V-5V, the adjusting power supply VCC1 changes the voltages at two ends of the variable capacitance diode D1 by outputting different adjusting voltages, and further changes the capacitance of the variable capacitance diode D1, so that the oscillation frequency of the oscillation circuit 11 is changed, the oscillation circuit 11 generates signals with different frequencies, therefore, different adjusting voltages can correspond to different frequencies of the signals, and the reference frequency of the reference frequency signal generated by the oscillation circuit 11 can be adjusted by adjusting the input voltage of the tuning circuit 12.
The amplifying circuit 133 includes a second resistor, a third resistor, a fourth resistor, and a second transistor. The second resistor is a resistor R2, the third resistor is a resistor R3, the fourth resistor is a resistor R4, and the second triode is a triode Q2. One end of the resistor R2 is grounded, the other end of the resistor R2 is connected to one end of the resistor R3, one end of the resistor R4 is used for being connected with a power supply VCC2, the other end of the resistor R3 is connected to the other end of the resistor R3838, the base B of the triode Q2 is connected between the resistor R3 and the resistor R4, the base B of the triode Q2 is further connected to one end of the capacitor C5, the emitter E of the triode Q2 is connected to the collector C of the triode Q1, and the collector C of the triode Q2 is. The voltage of the power supply VCC2 is 5V.
The frequency-doubling 2 circuit 14 includes a third triode, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a fifth resistor, a sixth resistor, and a second microstrip line. The third triode is a triode Q3, the tenth capacitor is a capacitor C10, the eleventh capacitor is a capacitor C11, the twelfth capacitor is a capacitor C12, the fifth resistor is a resistor R5, the sixth resistor is a resistor R6, and the second microstrip line is a microstrip line V2. One end of a capacitor C10 is connected to a collector C of the triode Q2, the other end of the capacitor C10 is connected to a base electrode of the triode Q3, the collector C of the triode Q3 is connected to the high-pass filter circuit 15, and an emitter E is grounded, one end of a resistor R5 is connected to a base electrode B of the triode Q3, the other end of the resistor R5 is connected to an emitter E of the triode Q3, one end of a resistor R6 is connected to a base electrode B of the triode Q3, and the other end of the resistor R3 is connected to the power supply VCC2, one end of a capacitor C11 is connected between the resistor R6 and the power supply VCC2, and the other end of the capacitor C2 is connected between the capacitor C11 and the power supply VCC2, the.
The high-pass filter circuit 15 includes a thirteenth capacitor, a third microstrip line, and a fourth microstrip line. The thirteenth capacitor is a capacitor C13, the third microstrip line is a microstrip line V3, and the fourth microstrip line is a microstrip line V4.
One end of a capacitor C13 is connected to a collector C of the triode Q3, the other end of the capacitor C13 is connected to the microstrip line V3, the other end of the microstrip line V3 is grounded, one end of the microstrip line V4 is connected to a collector C of the triode Q3, the other end of the microstrip line V4 is connected between the resistor R6 and the capacitor C11, and a connection node of the capacitor C13 and the microstrip line V3 is an output end of a C-band voltage-controlled oscillator and is used for being connected with.
The utility model provides a C wave band voltage controlled oscillator is through setting up oscillating circuit, tuned circuit. The frequency-multiplying circuit comprises an amplifying circuit, a frequency-multiplying circuit 2 and a high-pass filter, wherein a reference frequency signal is generated by an oscillating circuit and output to the amplifying circuit, the reference frequency of the reference frequency signal is adjusted by a tuning circuit in the generation process of the reference frequency signal, the reference frequency signal is amplified by the amplifying circuit and then output to the frequency-multiplying circuit 2, the frequency-multiplying circuit 2 outputs a frequency signal with the frequency within a C wave band, and the frequency signal is output to a load circuit through the high-pass filter circuit. The utility model provides a voltage-controlled oscillator can the output frequency in the frequency signal of C wave band, and circuit structure is simple, and the cost is lower and extensive applicability is general.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.
Claims (6)
1. A C-band voltage controlled oscillator, comprising: the circuit comprises an oscillating circuit, a tuning circuit, an amplifying circuit, a 2 frequency doubling circuit and a high-pass filter circuit; one end of the oscillating circuit is connected to the tuning circuit, and the other end of the oscillating circuit is connected to the amplifying circuit; the other end of the amplifying circuit is connected to the frequency doubling circuit 2; the other end of the frequency doubling circuit 2 is connected with the high-pass filter circuit; and the other end of the high-pass filter circuit is used for connecting a load circuit.
2. The C-band voltage controlled oscillator according to claim 1, wherein the oscillating circuit comprises a first transistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor and a first resistor, wherein the first capacitor has one end connected to the tuning circuit and the other end connected to the base of the first transistor, the second capacitor has one end connected to the collector of the first transistor and the other end connected to ground, the collector of the first transistor is further connected to the amplifying circuit, the third capacitor has one end connected to the base of the first transistor and the other end connected to one end of the fourth capacitor, the fourth capacitor has the other end connected to ground, the fifth capacitor has one end connected to the emitter of the first transistor and the other end connected to the amplifying circuit, and the first resistor has one end connected to the emitter of the first transistor and the other end connected to the emitter of the first transistor, The other end of the first triode is grounded, and the emitting electrode of the first triode is also connected between the third capacitor and the fourth capacitor.
3. The C-band voltage controlled oscillator of claim 2, wherein the tuning circuit comprises a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a first microstrip line, an inductor, and a varactor; one end of the sixth capacitor is connected to one end of the first capacitor, the other end of the sixth capacitor is connected to one end of the seventh capacitor, the positive electrode of the variable capacitance diode is grounded, the negative electrode of the variable capacitance diode is connected to the other end of the seventh capacitor, one end of the inductor is connected between the variable capacitance diode and the seventh capacitor, the other end of the inductor is used for being connected with an adjusting power supply, one end of the eighth capacitor is connected between the inductor and the adjusting power supply, the other end of the eighth capacitor is grounded, one end of the ninth capacitor is connected between the sixth capacitor and the seventh capacitor, the other end of the ninth capacitor is grounded, one end of the first microstrip line is connected between the sixth capacitor and the seventh capacitor.
4. The C-band voltage controlled oscillator according to claim 2, wherein the amplifying circuit includes a second resistor, a third resistor, a fourth resistor, and a second transistor, one end of the second resistor is grounded, the other end of the second resistor is connected to one end of the third resistor, one end of the fourth resistor is connected to a power supply, the other end of the fourth resistor is connected to the other end of the third resistor, a base of the second transistor is connected between the third resistor and the fourth resistor, the base of the second transistor is further connected to one end of the fifth capacitor, an emitter of the second transistor is connected to a collector of the first transistor, and a collector of the second transistor is connected to the frequency doubling circuit 2.
5. The C-band voltage-controlled oscillator according to claim 4, wherein the frequency-doubling 2 circuit comprises a third triode, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a fifth resistor, a sixth resistor and a second microstrip line; one end of the tenth capacitor is connected to the collector of the second triode, the other end of the tenth capacitor is connected to the base of the third triode, the collector of the third triode is connected to the high-pass filter circuit, the emitter of the third triode is grounded, one end of the fifth resistor is connected to the base of the third triode, the other end of the fifth resistor is connected to the emitter of the third triode, one end of the sixth resistor is connected to the base of the third triode, the other end of the sixth resistor is connected to the power supply, one end of the eleventh capacitor is connected between the sixth resistor and the power supply, the other end of the eleventh capacitor is grounded, one end of the second microstrip line is connected between the eleventh capacitor and the power supply, the other end of the second microstrip line is connected to the collector of the second triode, and one end of the twelfth capacitor is connected between, The other end is grounded.
6. The C-band voltage controlled oscillator of claim 5, wherein the high pass filter circuit comprises a thirteenth capacitor, a third microstrip, and a fourth microstrip; one end of the thirteenth capacitor is connected to the collector of the third triode, the other end of the thirteenth capacitor is connected to the third microstrip line, the other end of the third microstrip line is grounded, one end of the fourth microstrip line is connected to the collector of the third triode, the other end of the fourth microstrip line is connected between the sixth resistor and the eleventh capacitor, and a connection node of the thirteenth capacitor and the third microstrip line is used for connecting the load circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921750365.0U CN210297640U (en) | 2019-10-17 | 2019-10-17 | C-band voltage-controlled oscillator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921750365.0U CN210297640U (en) | 2019-10-17 | 2019-10-17 | C-band voltage-controlled oscillator |
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| Publication Number | Publication Date |
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| CN210297640U true CN210297640U (en) | 2020-04-10 |
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| CN201921750365.0U Active CN210297640U (en) | 2019-10-17 | 2019-10-17 | C-band voltage-controlled oscillator |
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