Radio frequency source module based on multichannel filtering

Abstract

The utility model provides a radio frequency source module based on multichannel filtering, the radio frequency source module comprises a phase-locked loop module, a frequency multiplication filtering amplification module and a frequency division filtering amplification module, the phase-locked loop module provides radio frequency signals for the frequency multiplication filtering amplification module and the frequency division filtering amplification module respectively, and the frequency division filtering amplification module provides frequency division signals for the frequency multiplication filtering amplification module and the frequency division filtering amplification module respectively. In the frequency multiplication filtering and amplifying module and the frequency division filtering and amplifying module, a filter is independently arranged for each frequency band, so that the finally output signal is purer.

Description

Technical Field

[0001] The utility model relates to the technical field of vector network analyzers, and particularly relates to a radio frequency source module based on multi-channel filtering. Background Art

[0002] The radio frequency source module is used to provide radio frequency source signals of different frequencies. In order to cover the entire frequency band, generally, a frequency multiplier for controlling and switching multiple different frequency bands is used to perform frequency multiplication and amplification on the radio frequency signal respectively, so that the radio frequency source module can output radio frequency source signals of different frequencies. After the multiple frequency multipliers perform frequency multiplication and amplification on the radio frequency signal, the frequency-multiplied and amplified radio frequency signals are combined into one path through a combining switch, and a filter is arranged on one path, and the frequency-multiplied and amplified radio frequency signal is filtered and then output through the filter, resulting in the final output signal not being pure enough. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a radio frequency source module based on multi-channel filtering. The radio frequency source module includes a phase-locked loop module, a frequency multiplication filtering and amplification module, and a frequency division filtering and amplification module. The phase-locked loop module provides radio frequency signals to the frequency multiplication filtering and amplification module and the frequency division filtering and amplification module respectively. Moreover, in the frequency multiplication filtering and amplification module and the frequency division filtering and amplification module, filters are separately arranged for each frequency band, so that the finally output signal is purer.

[0004] To solve the above technical problems, the utility model adopts the following solutions:

[0005] A radio frequency source module based on multi-channel filtering includes a phase-locked loop module, a frequency multiplication filtering and amplification module, and a frequency division filtering and amplification module. The output end of the phase-locked loop module is connected with a radio frequency input switch, the other end of the radio frequency input switch is connected with the input ends of the frequency multiplication filtering and amplification module and the frequency division filtering and amplification module, and the output ends of the frequency multiplication filtering and amplification module and the frequency division filtering and amplification module are connected with a radio frequency output switch;

[0006] The phase-locked loop module is used to provide radio frequency signals, and by controlling the radio frequency input switch, it is possible to select to input radio frequency signals to the frequency multiplication filtering and amplification module or the frequency division filtering and amplification module;

[0007] The frequency multiplication filtering and amplification module and the frequency division filtering and amplification module are used to filter radio frequency signals of specific frequency bands, and by controlling the radio frequency output switch, it is possible to select to output radio frequency signals of specific frequency bands.

[0008] Further, the frequency multiplication filtering and amplification module includes a frequency multiplier and a first switched filter bank connected in sequence. The frequency multiplier is connected with the radio frequency input switch, and the output end of the first switched filter bank is connected with the radio frequency output switch.

[0009] Further, the frequency division filtering and amplifying module includes multiple filtering channels, one filtering channel corresponding to one specific frequency band, and the input end of each filtering channel is connected to the radio frequency input switch, and the output end of each filtering channel is connected to the radio frequency output switch. Then, by controlling the radio frequency input switch and the radio frequency output switch, the radio frequency signal of a specific frequency band can be selectively output.

[0010] Further, the radio frequency output switch includes a first radio frequency output switch and a second radio frequency output switch. One end of the first radio frequency output switch is connected to the output ends of multiple filtering channels, and the other end of the first radio frequency output switch is connected to the second radio frequency output switch. Then, by controlling the first radio frequency output switch, the radio frequency signal of a specific frequency band can be selectively output to the second radio frequency output switch;

[0011] The output end of the first switch filter bank is connected to the second radio frequency output switch. Then, by controlling the second radio frequency output switch, the radio frequency signal of a specific frequency band can be selectively output.

[0012] Further, the frequency division filtering and amplifying module includes a first filtering channel, a second filtering channel, a third filtering channel, and a fourth filtering channel;

[0013] The first filtering channel includes a second switch filter bank;

[0014] The second filtering channel includes a first frequency divider and a third switch filter bank connected in sequence;

[0015] The third filtering channel includes a second frequency divider and a fourth switch filter bank connected in sequence;

[0016] The fourth filtering channel includes a third frequency divider, a DDS, and a filter connected in sequence;

[0017] Moreover, the frequency division numbers of the first frequency divider, the second frequency divider, and the third frequency divider increase in sequence, so that the specific frequency bands of the first filtering channel, the second filtering channel, the third filtering channel, and the fourth filtering channel decrease in sequence.

[0018] Further, the frequency multiplier is a 2-times frequency multiplier. The first switch filter bank is composed of a group of single-pole double-throw switches and two band-pass filters. Both ends of the two band-pass filters are connected to the single-pole double-throw switches to achieve frequency selection filtering.

[0019] Further, the second switch filter bank is composed of a group of single-pole double-throw switches and four low-pass filters. Two low-pass filters form a group of filters, and both ends of a group of filters are connected to the single-pole double-throw switches.

[0020] Further, the third switched filter bank consists of a group of single-pole double-throw switches and two low-pass filters, and both ends of the two low-pass filters are connected to the single-pole double-throw switches.

[0021] Further, two stages of amplifiers are provided between the first radio frequency output switch and the second radio frequency output switch, and the amplifier is used to adjust the amplitude of the radio frequency signal and then output the radio frequency signal of a specific frequency band.

[0022] Advantages of the present utility model:

[0023] The present utility model provides a radio frequency source module based on multi-channel filtering. The radio frequency source module includes a phase-locked loop module, a frequency multiplication filtering and amplifying module, and a frequency division filtering and amplifying module. The phase-locked loop module provides radio frequency signals to the frequency multiplication filtering and amplifying module and the frequency division filtering and amplifying module respectively. Moreover, in the frequency multiplication filtering and amplifying module and the frequency division filtering and amplifying module, filters are separately set for each frequency band, so that the finally output signal is purer. Description of the drawings

[0024] Figure 1 It is a schematic diagram of the radio frequency source module in Embodiment 1 of the present utility model;

[0025] Figure 2 It is a schematic diagram of the frequency multiplication filtering and amplifying module and the frequency division filtering and amplifying module in Embodiment 1 of the present utility model;

[0026] Figure 3 It is a circuit schematic diagram of the frequency multiplication filtering and amplifying module and the frequency division filtering and amplifying module in Embodiment 1 of the present utility model. Specific implementation manners

[0027] To enable those skilled in the art to better understand the technical solutions of the present utility model, the present utility model will be further described in detail below with reference to the drawings and specific implementation manners, but the implementation manners of the present utility model are not limited thereto.

[0028] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model.

[0029] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "arranged", "provided with", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0030] The present utility model will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments:

[0031] Embodiment 1

[0032] The present utility model provides a radio frequency source module based on multi-channel filtering. The radio frequency source module is used to provide radio frequency source signals of different frequencies. In order to cover the entire frequency band, in the present utility model, the radio frequency source module adopts a frequency multiplication filtering and amplification module and a frequency division filtering and amplification module. The frequency multiplication filtering and amplification module and the frequency division filtering and amplification module are connected through a radio frequency input switch and a radio frequency output switch, and it is possible to select to provide radio frequency signals to the frequency multiplication filtering and amplification module and the frequency division filtering and amplification module, so that the radio frequency signals are output after frequency multiplication amplification and filtering in the frequency multiplication filtering and amplification module or the frequency division filtering and amplification module.

[0033] In this embodiment, as Figure 1 shown, the radio frequency source module includes a phase-locked loop module, a frequency multiplication filtering and amplification module, and a frequency division filtering and amplification module. The output end of the phase-locked loop module is connected with a radio frequency input switch, and the other end of the radio frequency input switch is connected to the input ends of the frequency multiplication filtering and amplification module and the frequency division filtering and amplification module. The output ends of the frequency multiplication filtering and amplification module and the frequency division filtering and amplification module are connected with a radio frequency output switch; the phase-locked loop module is used to provide a 4-8 GHz radio frequency signal, and by controlling the radio frequency input switch, it is possible to select to input radio frequency signals to the frequency multiplication filtering and amplification module or the frequency division filtering and amplification module; the frequency multiplication filtering and amplification module and the frequency division filtering and amplification module are used to perform frequency multiplication amplification and filtering on radio frequency signals in a specific frequency band. Through the frequency multiplication filtering and amplification module, a 8-13.5 GHz radio frequency signal can be output, and through the frequency division filtering and amplification module, a 10 MHz-8 GHz radio frequency signal can be output. Then, by controlling the radio frequency output switch, it is possible to select to output a 8-13.5 GHz radio frequency signal or a 10 MHz-8 GHz radio frequency signal.

[0034] Specifically, as Figure 2As shown, the frequency doubling filter amplification module includes a frequency doubling channel, and a frequency doubling channel consists of a frequency doubler and a first switched filter bank connected in sequence. The frequency doubler is connected to the RF input switch, and the output end of the first switched filter bank is connected to the RF output switch, so that an RF signal of 8 - 13.5 GHz can be output through the frequency doubling filter amplification module. The frequency division filter amplification module includes a first filter channel, a second filter channel, a third filter channel, and a fourth filter channel. The first filter channel, the second filter channel, the third filter channel, and the fourth filter channel are divided according to frequency, so that the RF signals output through the first filter channel, the second filter channel, the third filter channel, and the fourth filter channel respectively can generate RF signals in different frequency bands. Specifically, the RF signal output through the first filter channel is an RF signal of 4 - 8 GHz, the RF signal output through the second filter channel is an RF signal of 2 - 4 GHz, the RF signal output through the third filter channel is an RF signal of 0.125 - 2 GHz, and the RF signal output through the fourth filter channel is an RF signal of 10 MHz - 125 MHz.

[0035] And, in order to output RF signals within the corresponding frequency bands through the above-mentioned frequency doubling filter amplification module and frequency division filter amplification module respectively, as Figure 2 shown, the RF output switch includes a first RF output switch and a second RF output switch. One end of the first RF output switch is connected to the output ends of the four filter channels, and the other end of the first RF output switch is connected to the second RF output switch. Then, by controlling the first RF output switch, an RF signal of a specific frequency band can be selected to be output to the second RF output switch. The output end of the first switched filter bank is connected to the second RF output switch. Then, by controlling the second RF output switch, an RF signal of a specific frequency band can be selected to be output.

[0036] Based on the above RF source module, the present utility model mainly sets filters separately for each frequency band in the frequency doubling filter amplification module or the frequency division filter amplification module for filtering. In order to make the RF signal finally output by the frequency doubling filter amplification module or the frequency division filter amplification module purer. Specifically, as Figure 3 shown, the frequency doubling filter amplification module includes a frequency doubler and a first switched filter bank connected in sequence. The frequency doubler is connected to the RF input switch, and the output end of the first switched filter bank is connected to the RF output switch, so that an RF signal of 8 - 13.5 GHz can be output through the frequency doubling filter amplification module.

[0037] And, the frequency division filter amplification module forms multiple different filter channels according to different frequency band divisions. Then, separate filters are set in each filter channel, so that each frequency band can be filtered accordingly according to the frequency band, making the RF signal selected and output by the frequency division filter amplification module purer.

[0038] According to the 4 - 8 GHz radio frequency signal provided by the phase - locked loop module and the frequency bands corresponding to the radio frequency signals output by the first filtering channel, the second filtering channel, the third filtering channel, and the fourth filtering channel, the frequency dividers and filters in the first filtering channel, the second filtering channel, the third filtering channel, and the fourth filtering channel can be set separately. Then, the first filtering channel, the second filtering channel, the third filtering channel, and the fourth filtering channel include different frequency dividers and filters, as follows:

[0039] The first filtering channel includes a second switched filter bank;

[0040] The second filtering channel includes a first frequency divider and a third switched filter bank connected in sequence;

[0041] The third filtering channel includes a second frequency divider and a fourth switched filter bank connected in sequence;

[0042] The fourth filtering channel includes a third frequency divider, a DDS, and a filter connected in sequence.

[0043] Specifically, as Figure 3 shown, the division ratios of the first frequency divider, the second frequency divider, and the third frequency divider increase in sequence. The division ratio of the first frequency divider is 2, that is, the first frequency divider is a 2 - frequency divider; and the division ratio of the second frequency divider can be 4, 8, 16, 32, that is, the second frequency divider is a 4 - frequency divider / 8 - frequency divider / 16 - frequency divider / 32 - frequency divider; the division ratio of the third frequency divider can also be 4, 8, 16, 32, that is, the third frequency divider is a 4 - frequency divider / 8 - frequency divider / 16 - frequency divider / 32 - frequency divider. Then, the first filtering channel, the second filtering channel, the third filtering channel, and the fourth filtering channel are divided into different frequency bands, and radio frequency signals within different frequency bands are generated through frequency multiplication, amplification, and filtering;

[0044] For the first filtering channel, the second filtering channel, the third filtering channel, and the fourth filtering channel with different frequency dividers, the filters are set separately. Specifically, as Figure 3As shown, in the first filtering channel, the second switched filter bank consists of a group of single-pole double-throw switches and four low-pass filters. Two low-pass filters form a group of filters, and both ends of a group of filters are connected to the single-pole double-throw switches; in the second filtering channel, the third switched filter bank consists of a group of single-pole double-throw switches and two low-pass filters, and both ends of the two low-pass filters are connected to the single-pole double-throw switches; in the third filtering channel, the fourth switched filter bank is divided into 6-way filtering, and different-way filtering can be selected through switch switching for filtering, and each way is separately provided with a corresponding filter; in the fourth filtering channel, since the fourth filtering channel is the low-frequency part and a 10 MHz - 125 MHz radio frequency signal is generated by DDS, two successively connected low-pass filters are provided in the fourth filtering channel, and an attenuator is provided between the two successively connected low-pass filters.

[0045] Based on the above filtering channels with different frequency bands, corresponding filters are separately provided in the frequency doubling filtering and amplifying module and the first, second, third, and fourth filtering channels according to the frequency bands, making the finally output signal purer.

[0046] Moreover, two-stage amplifiers are further provided between the first radio frequency output switch and the second radio frequency output switch, and the amplifiers are used to adjust the amplitude of the radio frequency signal and then output a radio frequency signal of a specific frequency band.

[0047] It can be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principle of the present invention. However, the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also regarded as the protection scope of the present invention.

Claims

1. A radio frequency source module based on multi-channel filtering, characterized in that, It includes a phase-locked loop module, a frequency multiplication filtering and amplification module, and a frequency division filtering and amplification module. The output end of the phase-locked loop module is connected to a radio frequency input switch, the other end of the radio frequency input switch is connected to the input ends of the frequency multiplication filtering and amplification module and the frequency division filtering and amplification module, and the output ends of the frequency multiplication filtering and amplification module and the frequency division filtering and amplification module are connected to a radio frequency output switch; The phase-locked loop module is used to provide a radio frequency signal, and by controlling the radio frequency input switch, it is possible to select to input the radio frequency signal to the frequency multiplication filtering and amplification module or the frequency division filtering and amplification module; The frequency multiplication filtering and amplification module and the frequency division filtering and amplification module are used to filter the radio frequency signal of a specific frequency band, and by controlling the radio frequency output switch, it is possible to select to output the radio frequency signal of a specific frequency band.

2. The RF source module based on multi-channel filtering according to claim 1, characterized in that The frequency multiplication filtering and amplification module includes a frequency multiplier and a first switch filter bank connected in sequence. The frequency multiplier is connected to the radio frequency input switch, and the output end of the first switch filter bank is connected to the radio frequency output switch.

3. The RF source module based on multi-channel filtering according to claim 2, characterized in that The frequency division filtering and amplification module includes multiple filtering channels. One filtering channel corresponds to one specific frequency band, and the input end of each filtering channel is connected to the radio frequency input switch, and the output end of each filtering channel is connected to the radio frequency output switch. By controlling the radio frequency input switch and the radio frequency output switch, it is possible to select to output the radio frequency signal of a specific frequency band.

4. The radio frequency source module based on multi-channel filtering according to claim 3, characterized in that, The radio frequency output switch includes a first radio frequency output switch and a second radio frequency output switch. One end of the first radio frequency output switch is connected to the output ends of multiple filtering channels, and the other end of the first radio frequency output switch is connected to the second radio frequency output switch. By controlling the first radio frequency output switch, it is possible to select to output the radio frequency signal of a specific frequency band to the second radio frequency output switch; The output end of the first switch filter bank is connected to the second radio frequency output switch. By controlling the second radio frequency output switch, it is possible to select to output the radio frequency signal of a specific frequency band.

5. The radio frequency source module based on multi-channel filtering according to claim 3, characterized in that, The frequency division filtering and amplification module includes a first filtering channel, a second filtering channel, a third filtering channel, and a fourth filtering channel; The first filtering channel includes a second switch filter bank; The second filtering channel includes a first frequency divider and a third switch filter bank connected in sequence; The third filtering channel includes a second frequency divider and a fourth switch filter bank connected in sequence; The fourth filtering channel includes a third frequency divider, a DDS, and a filter connected in sequence; And the division ratios of the first frequency divider, the second frequency divider, and the third frequency divider increase in sequence, so that the specific frequency bands of the first filtering channel, the second filtering channel, the third filtering channel, and the fourth filtering channel decrease in sequence.

6. The radio frequency source module based on multi-channel filtering according to claim 2, wherein, The frequency multiplier is a 2-times frequency multiplier. The first switch filter bank consists of a group of single-pole double-throw switches and two band-pass filters. Both ends of the two band-pass filters are connected to the single-pole double-throw switches to achieve frequency selection filtering.

7. A radio frequency source module based on multi-channel filtering according to claim 5, characterized in that The second switch filter bank consists of a group of single-pole double-throw switches and four low-pass filters. Two low-pass filters form a group of filters, and both ends of a group of filters are connected to the single-pole double-throw switches.

8. The RF source module based on multi-channel filtering according to claim 5, characterized in that The third switch filter bank consists of a group of single-pole double-throw switches and two low-pass filters. Both ends of the two low-pass filters are connected to the single-pole double-throw switches.

9. The radio frequency source module based on multi-channel filtering according to claim 4, wherein There are also two - stage amplifiers provided between the first radio - frequency output switch and the second radio - frequency output switch. The amplifier is used to adjust the amplitude of the radio - frequency signal and then output the radio - frequency signal of a specific frequency band.

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