CN210745082U - Up-conversion assembly applied to C-band half-duplex radio frequency assembly - Google Patents
Up-conversion assembly applied to C-band half-duplex radio frequency assembly Download PDFInfo
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- CN210745082U CN210745082U CN201922278027.8U CN201922278027U CN210745082U CN 210745082 U CN210745082 U CN 210745082U CN 201922278027 U CN201922278027 U CN 201922278027U CN 210745082 U CN210745082 U CN 210745082U
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Abstract
The utility model discloses an up-conversion component applied to C wave band half-duplex radio frequency component, which comprises a first filter, a first attenuator, a frequency mixer, a local oscillator signal circuit, a second attenuator, a second filter, a first amplifier, a third filter, a second amplifier, a third attenuator and a fourth filter; the up-conversion component effectively enhances the inhibition capability on stray through multi-stage filtering, so that stray signals carried by output are less; and the up-conversion component is provided with a combination of a multi-stage amplifier and an attenuator, so that the gain flatness is improved.
Description
Technical Field
The utility model relates to a microwave communication technique, especially an up-conversion subassembly that is applied to C wave band half-duplex radio frequency subassembly.
Background
In microwave communication, including a receiver and a transmitter, the spurs of radio frequency signals received by the receiver mainly come from signal spurs in space and spurs carried by the radio frequency signals during transmission, and the problem of the signal spurs in the space is difficult to improve, so that improvement from the radio frequency transmitter is needed.
In the prior art, for example, in a utility model of a frequency conversion channel circuit of an up-conversion system with application number 201620003110.8, an up-conversion channel comprises a mixer, an attenuator, an amplifier, an equalizer, a band-pass filter and a low-pass filter which are connected in sequence; it can be seen that the spurious suppression capability of the up-conversion channel and the flatness of the gain are room for further improvement.
In order to solve the above problem, the present invention provides a further improvement to make the up-conversion module provide better stray rejection capability and gain flatness.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's not enough, provide an up-conversion subassembly that is applied to C wave band half-duplex radio frequency subassembly, it has good stray inhibition ability and gain flatness.
The purpose of the utility model is realized through the following technical scheme:
an up-conversion component applied to a C-band half-duplex radio frequency component comprises a first filter, a first attenuator, a frequency mixer, a local oscillation signal circuit, a second attenuator, a second filter, a first amplifier, a third filter, a second amplifier, a third attenuator and a fourth filter;
the input end of the first filter is the intermediate frequency signal input end of the up-conversion component, the output end of the first filter is connected with the input end of the first attenuator, the output end of the first attenuator is connected with the first input end of the mixer, the second input end of the mixer is connected with the output end of the local oscillator signal circuit, the output end of the mixer is connected with the input end of the second attenuator, the output end of the second attenuator is connected with the input end of the second filter, the output end of the second filter is connected with the input end of the first amplifier, the output end of the first amplifier is connected with the input end of the third filter, the output end of the third filter is connected with the input end of the second amplifier, the output end of the second amplifier is connected with the input end of the third attenuator, and the output end of the third attenuator is connected with the input end of the fourth filter, the output end of the fourth filter is the radio frequency signal output end of the up-conversion component.
Further, the first filter is an intermediate frequency filter, the second filter is a radio frequency filter, and the third filter and the fourth filter are both low-pass filters.
The local oscillator signal circuit comprises a first oscillator, a phase-locked loop, a fourth attenuator, a third amplifier and a fifth filter;
the first oscillator generates an external reference signal and outputs the external reference signal to the input end of the phase-locked loop, the output end of the phase-locked loop is connected with the input end of the fourth attenuator, the output end of the fourth attenuator is connected with the input end of the third amplifier, the output end of the third amplifier is connected with the input end of the fifth filter, and the output end of the fifth filter is the output end of the local oscillator signal circuit and is connected with the second input end of the frequency mixer.
The phase-locked loop comprises a phase discriminator, a charge pump, a sixth filter, a second oscillator, a frequency divider, a seventh filter, a fourth amplifier and an eighth filter;
the input end of the phase discriminator is the input end of the phase-locked loop and is connected with the output end of the first oscillator, the output end of the phase discriminator is connected with the input end of the charge pump, the output end of the charge pump is connected with the input end of the sixth filter, the output end of the sixth filter is connected with the input end of the second oscillator, the output end of the second oscillator is connected with the input end of the fourth amplifier, the output end of the fourth amplifier is connected with the input end of the eighth filter, the output end of the eighth filter is the output end of the phase-locked loop and is connected with the input end of the fourth attenuator, the other output end of the second oscillator is connected with the input end of the seventh filter, the output end of the seventh filter is connected with the input end of the frequency divider, and the output end of the frequency divider is connected with the other input end of the phase discriminator.
Further, the first oscillator is an oven controlled crystal oscillator, and the fifth filter is a low pass filter.
Further, the sixth filter and the seventh filter are both low-pass filters, the eighth filter is a band-pass filter, and the second oscillator is a voltage-controlled oscillator.
Further, the up-conversion component further comprises an amplitude equalizer, an input end of the amplitude equalizer is connected to an output end of the first filter, and an output end of the amplitude equalizer is connected to an input end of the first attenuator.
The utility model has the advantages of it is following:
the up-conversion component effectively enhances the inhibition capability on stray through multi-stage filtering, so that stray signals carried by output are less; and the up-conversion component is provided with a combination of a multi-stage amplifier and an attenuator, so that the gain flatness is improved.
Drawings
Fig. 1 is a circuit diagram of an up-conversion module according to the present invention;
fig. 2 is a local oscillator signal circuit of the up-conversion module of the present invention;
fig. 3 is a circuit diagram of a phase-locked loop of the up-conversion module of the present invention;
fig. 4 is another circuit diagram of the up-conversion module of the present invention;
in the figure, 1-first filter, 2-first attenuator, 3-mixer, 4-second attenuator, 5-second filter, 6-first amplifier, 7-third filter, 8-second amplifier, 9-third attenuator, 10-fourth filter, 11-first oscillator, 12-phase locked loop, 13-fourth attenuator, 14-third amplifier, 15-fifth filter, 16-phase detector, 17-charge pump, 18-sixth filter, 19-second oscillator, 20-frequency divider, 21-seventh filter, 22-fourth amplifier, 23-eighth filter, 24-amplitude equalizer.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following description will clearly describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that 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 work belong to the protection scope of the present invention.
An embodiment of the present invention provides an up-conversion component applied to a C-band half-duplex radio frequency component, as shown in fig. 1, which includes a first filter 1, a first attenuator 2, a mixer 3, a local oscillator signal circuit, a second attenuator 4, a second filter 5, a first amplifier 6, a third filter 7, a second amplifier 8, a third attenuator 9, and a fourth filter 10; by adopting multi-stage filtering, the spurious suppression capability is effectively enhanced, and spurious signals carried by output are less; and the gain flatness can be improved by adopting the combination of the multistage amplifier and the attenuator.
The input end of the first filter 1 is the intermediate frequency signal input end of the up-conversion component, the output end of the first filter 1 is connected with the input end of the first attenuator 2, the output end of the first attenuator 2 is connected with the first input end of the mixer 3, the second input end of the mixer 3 is connected with the output end of the local oscillation signal circuit, the output end of the mixer 3 is connected with the input end of the second attenuator 4, the output end of the second attenuator 4 is connected with the input end of the second filter 5, the output end of the second filter 5 is connected with the input end of the first amplifier 6, the output end of the first amplifier 6 is connected with the input end of the third filter 7, the output end of the third filter 7 is connected with the input end of the second amplifier 8, and the output end of the second amplifier 8 is connected with the input end of the third attenuator 9, the output end of the third attenuator 9 is connected to the input end of the fourth filter 10, and the output end of the fourth filter 10 is the radio frequency signal output end of the up-conversion component.
The first filter 1 can effectively filter stray signals in the input intermediate frequency signals, and the second filter 5 can further process radio frequency signals generated after frequency mixing, so that the stray signals in effective signals are reduced; the multi-stage attenuator and amplifier can make the power control of the signal transmitted by the transmitter more accurate, and can make the gain flatness of the signal in the up-conversion channel better.
The first filter 1 is an intermediate frequency filter, and can effectively filter stray in an input intermediate frequency signal; the second filter 5 is a radio frequency filter, and can effectively filter stray in radio frequency signals formed after frequency mixing; the third filter 7 and the fourth filter 10 are both low-pass filters.
As shown in fig. 2, the local oscillator signal circuit includes a first oscillator 11, a phase-locked loop 12, a fourth attenuator 13, a third amplifier 14, and a fifth filter 15;
the first oscillator 11 generates an external reference signal and outputs the external reference signal to an input end of the phase-locked loop 12, an output end of the phase-locked loop 12 is connected to an input end of the fourth attenuator 13, an output end of the fourth attenuator 13 is connected to an input end of the third amplifier 14, an output end of the third amplifier 14 is connected to an input end of the fifth filter 15, and an output end of the fifth filter 15 is a second input end of the local oscillator signal circuit and connected to the mixer 3.
It can be seen that the local oscillator signal circuit also has good power control capability under the action of the third attenuator 9 and the third amplifier 14, and the fifth filter 15 at the final stage of the local oscillator signal ensures spurious suppression before the local oscillator signal is output, thereby reducing the influence of the local oscillator signal spurious on the radio frequency signal generated by the up-conversion component.
As shown in fig. 3, the phase locked loop 12 includes a phase detector 16, a charge pump 17, a sixth filter 18, a second oscillator 19, a frequency divider 20, and a seventh filter 21;
the input end of the phase detector 16 is the input end of the phase-locked loop 12 and is connected to the output end of the first oscillator 11, the output end of the phase detector 16 is connected to the input end of the charge pump 17, the output end of the charge pump 17 is connected to the input end of the sixth filter 18, the output end of the sixth filter 18 is connected to the input end of the second oscillator 19, the output end of the second oscillator 19 is connected to the input end of the fourth amplifier 22, the output end of the fourth amplifier 22 is connected to the input end of the eighth filter 23, the output end of the eighth filter 23 is the output end of the phase-locked loop 12 and is connected to the input end of the fourth attenuator 13, the other output end of the second oscillator 19 is connected to the input end of the seventh filter 21, and the output end of the seventh filter 21 is connected to the input end of the frequency divider 20, the output terminal of the frequency divider 20 is connected to the other input terminal of the phase detector 16.
The first oscillator 11 is an oven controlled crystal oscillator which can effectively reduce the heat productivity of the system, and the fifth filter 15 is a low pass filter.
The sixth filter 18 and the seventh filter 21 are both low-pass filters, the eighth filter 23 is a band-pass filter, and the second oscillator 19 is a voltage-controlled oscillator.
In another embodiment of the present invention, as shown in fig. 4, the up-conversion component further includes an amplitude equalizer 24, an input end of the amplitude equalizer 24 is connected to an output end of the first filter 1, an output end of the amplitude equalizer 24 is connected to an input end of the first attenuator 2, and the amplitude equalizer 24 makes flatness in a band better.
Claims (7)
1. An up-conversion component applied to a C-band half-duplex radio frequency component is characterized by comprising a first filter, a first attenuator, a frequency mixer, a local oscillator signal circuit, a second attenuator, a second filter, a first amplifier, a third filter, a second amplifier, a third attenuator and a fourth filter;
the input end of the first filter is the intermediate frequency signal input end of the up-conversion component, the output end of the first filter is connected with the input end of the first attenuator, the output end of the first attenuator is connected with the first input end of the mixer, the second input end of the mixer is connected with the output end of the local oscillator signal circuit, the output end of the mixer is connected with the input end of the second attenuator, the output end of the second attenuator is connected with the input end of the second filter, the output end of the second filter is connected with the input end of the first amplifier, the output end of the first amplifier is connected with the input end of the third filter, the output end of the third filter is connected with the input end of the second amplifier, the output end of the second amplifier is connected with the input end of the third attenuator, and the output end of the third attenuator is connected with the input end of the fourth filter, the output end of the fourth filter is the radio frequency signal output end of the up-conversion component.
2. The upconversion assembly according to claim 1, wherein the first filter is an intermediate frequency filter, the second filter is a radio frequency filter, and the third filter and the fourth filter are both low pass filters.
3. The upconversion assembly of claim 1 wherein the local oscillator signal circuit comprises a first oscillator, a phase locked loop, a fourth attenuator, a third amplifier, and a fifth filter;
the first oscillator generates an external reference signal and outputs the external reference signal to the input end of the phase-locked loop, the output end of the phase-locked loop is connected with the input end of the fourth attenuator, the output end of the fourth attenuator is connected with the input end of the third amplifier, the output end of the third amplifier is connected with the input end of the fifth filter, and the output end of the fifth filter is the output end of the local oscillator signal circuit and is connected with the second input end of the frequency mixer.
4. The upconversion assembly of claim 3 wherein the phase locked loop comprises a phase detector, a charge pump, a sixth filter, a second oscillator, a frequency divider, a seventh filter, a fourth amplifier, and an eighth filter;
the input end of the phase discriminator is the input end of the phase-locked loop and is connected with the output end of the first oscillator, the output end of the phase discriminator is connected with the input end of the charge pump, the output end of the charge pump is connected with the input end of the sixth filter, the output end of the sixth filter is connected with the input end of the second oscillator, the output end of the second oscillator is connected with the input end of the fourth amplifier, the output end of the fourth amplifier is connected with the input end of the eighth filter, the output end of the eighth filter is the output end of the phase-locked loop and is connected with the input end of the fourth attenuator, the other output end of the second oscillator is connected with the input end of the seventh filter, the output end of the seventh filter is connected with the input end of the frequency divider, and the output end of the frequency divider is connected with the other input end of the phase discriminator.
5. The upconversion assembly according to claim 3, wherein the first oscillator is an oven controlled crystal oscillator and the fifth filter is a low pass filter.
6. The upconversion assembly according to claim 4, wherein the sixth filter and the seventh filter are each a low pass filter, wherein the eighth filter is a band pass filter, and wherein the second oscillator is a voltage controlled oscillator.
7. The upconversion component of claim 1 further comprising an amplitude equalizer having an input coupled to the output of the first filter and an output coupled to the input of the first attenuator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922278027.8U CN210745082U (en) | 2019-12-17 | 2019-12-17 | Up-conversion assembly applied to C-band half-duplex radio frequency assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922278027.8U CN210745082U (en) | 2019-12-17 | 2019-12-17 | Up-conversion assembly applied to C-band half-duplex radio frequency assembly |
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| Publication Number | Publication Date |
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| CN210745082U true CN210745082U (en) | 2020-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922278027.8U Active CN210745082U (en) | 2019-12-17 | 2019-12-17 | Up-conversion assembly applied to C-band half-duplex radio frequency assembly |
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| CN (1) | CN210745082U (en) |
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