CN216290874U - Multi-channel receiver - Google Patents
Multi-channel receiver Download PDFInfo
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- CN216290874U CN216290874U CN202122840923.6U CN202122840923U CN216290874U CN 216290874 U CN216290874 U CN 216290874U CN 202122840923 U CN202122840923 U CN 202122840923U CN 216290874 U CN216290874 U CN 216290874U
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Abstract
The utility model provides a multi-channel receiver.A first power division filtering module and a first frequency conversion channel module are connected to form a group of receivers, and a second power division filtering module and a second frequency conversion channel module are connected to form another group of receivers; each group of receivers in the utility model simultaneously carries out down-conversion on 9 subsections, and 9 paths of 96MHz intermediate frequency signals are output for processing by a digital processor at the rear end. The utility model integrates 18 channels and 18 channels local oscillators, and has simple and compact structure and high integration level; the full-band real-time receiving can be realized, and the requirement of a high-speed frequency hopping system is met. Meanwhile, the utility model can carry out multi-channel and large dynamic receiving, so the receiver provided by the utility model has good sensitivity and high isolation.
Description
Technical Field
The utility model relates to the technical field of communication, in particular to a multi-channel receiver.
Background
The receiver is mainly used for outputting an intermediate frequency modulation signal with lower frequency after mixing or down-converting a received radio frequency signal and a local oscillator signal with a certain frequency, wherein the frequency of the intermediate frequency signal is a fixed frequency difference between the local oscillator signal and the frequency of the received signal. However, current receivers are mainly single-channel receivers, and the single-channel receivers have low sensitivity.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, it is an object of the present invention to provide a multi-channel receiver for solving the problem of low sensitivity of single-channel receivers.
To achieve the above and other related objects, the present invention provides a multi-channel receiver, comprising:
the first power division filtering module is used for performing power division filtering on the radio-frequency signals of the first frequency band and forming multi-path frequency band signals;
the second power division filtering module is used for performing power division filtering on the radio-frequency signals of the second frequency band and forming multi-path frequency band signals;
the first frequency conversion channel module is used for carrying out down-conversion on each path of frequency band signal output by the first power division filtering module;
the second frequency conversion channel module is used for carrying out down-conversion on each path of frequency band signal output by the second power division filtering module;
the local oscillation module is used for providing local oscillation signals, and the local oscillation signals are used for carrying out frequency mixing with each path of intermediate frequency signals output by the first frequency conversion channel module and each path of intermediate frequency signals output by the second frequency conversion channel module to generate intermediate frequency signals with fixed frequency;
the first power division filtering module is connected with the first frequency conversion channel module, the second power division filtering module is connected with the second frequency conversion channel module, and the first frequency conversion channel module and the second frequency conversion channel module are both connected with the local oscillation module.
Optionally, the first power division filtering module and the second power division filtering module at least include: a power divider and a filter.
Optionally, the frequency of the first frequency band is smaller than that of the second frequency band, and the number of down-conversion channels in the first frequency conversion channel module is smaller than that of the second frequency conversion channel module.
Optionally, the radio frequency signal of the first frequency band is 1350MHz to 1518MHz, and the radio frequency signal of the second frequency band is 1625MHz to 1785 MHz.
Optionally, the frequency band signal output by the first power division filtering module includes: 1383.33 MHz-1410 MHz, 1410 MHz-1450 MHz, 1450 MHz-1490 MHz, 1490 MHz-1516.667 MHz;
the frequency band signal output by the second power division filtering module includes: 1626.333 MHz-1653 MHz, 1653 MHz-1679.667 MHz, 1679.666 MHz-1706.333 MHz, 1706.333 MHz-1746.333 MHz and 1746.333 MHz-1773 MHz.
Optionally, the local oscillation module includes 9 point frequency sources, where each point frequency source provides a local oscillation signal for each intermediate frequency signal output by the first frequency conversion channel module and each intermediate frequency signal output by the first frequency conversion channel module;
the frequency of the local oscillation signal provided by the local oscillation module is 120 MHz.
Optionally, the frequency of each path of intermediate frequency signal output by the first frequency conversion channel module and the second frequency conversion channel module is 96 MHz.
As described above, the present invention provides a multi-channel receiver, which has the following advantages: according to the utility model, a first power division filtering module and a first frequency conversion channel module are respectively connected to form a group of receivers, and then a second power division filtering module and a second frequency conversion channel module are connected to form another group of receivers; each group of receivers in the utility model simultaneously carries out down-conversion on 9 subsections, and 9 paths of 96MHz intermediate frequency signals are output for processing by a digital processor at the rear end. The radio frequency signal is channelized and filtered by a power division filtering module consisting of a power divider and a filter, then a corresponding down-conversion channel is selected from a frequency conversion channel module, and after amplification, filtering, frequency mixing and gain control, an intermediate frequency signal with stable frequency is output for a back end to use, for example, a digital processor at the back end. In addition, the utility model integrates 18 channels and 18 channels local oscillators, and has simple and compact structure and high integration level; the full-band real-time receiving can be realized, and the requirement of a high-speed frequency hopping system is met. Meanwhile, the utility model can carry out multi-channel and large dynamic receiving, so the receiver provided by the utility model has good sensitivity and high isolation.
Drawings
Fig. 1 is a schematic diagram of a hardware structure of a multi-channel receiver according to an embodiment;
fig. 2 is a schematic diagram of a hardware structure of a multi-channel receiver according to another embodiment.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The utility model is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
Referring to fig. 1, the present invention provides a multi-channel receiver, including:
the first power division filtering module is used for performing power division filtering on the radio-frequency signals of the first frequency band and forming multi-path frequency band signals;
the second power division filtering module is used for performing power division filtering on the radio-frequency signals of the second frequency band and forming multi-path frequency band signals;
the first frequency conversion channel module is used for providing a plurality of down-conversion channels, and each down-conversion channel can perform down-conversion on each channel of frequency band signals output by the first power division filtering module;
the second frequency conversion channel module is used for providing a plurality of down-conversion channels, and each down-conversion channel can perform down-conversion on each channel of frequency band signals output by the second power division filtering module;
the local oscillation module is used for providing local oscillation signals, and the local oscillation signals are used for carrying out frequency mixing with each path of intermediate frequency signals output by the first frequency conversion channel module and each path of intermediate frequency signals output by the second frequency conversion channel module to generate intermediate frequency signals with fixed frequency;
the first power division filtering module is connected with the first frequency conversion channel module, the second power division filtering module is connected with the second frequency conversion channel module, and the first frequency conversion channel module and the second frequency conversion channel module are both connected with the local oscillation module.
In the present invention, the first power division filtering module and the second power division filtering module at least include: a power divider and a filter; that is, the first power division filtering module and the second power division filtering module may be composed of a power divider, a filter, and other connection circuits.
In the present invention, the frequency of the first frequency band is smaller than that of the second frequency band, and the number of down-conversion channels in the first frequency conversion channel module is smaller than that of the second frequency conversion channel module. By way of example, the radio frequency signals in the first frequency band may be 1350MHz to 1518MHz, and the radio frequency signals in the second frequency band may be 1625MHz to 1785 MHz. The number of down-conversion channels in the first frequency conversion channel module may be 4, and the number of down-conversion channels in the second frequency conversion channel module may be 5.
According to the above description, in the present invention, the radio frequency signals 1350MHz to 1518MHz in the first frequency band are processed by the first power division filtering module, and then 4 frequency band signals, that is, 1383.33MHz to 1410MHz, 1410MHz to 1450MHz, 1450MHz to 1490MHz, and 1490MHz to 1516.667MHz, are output respectively. The down-conversion channel 1 in the first frequency conversion channel module performs down-conversion on channel signals of 1383.33 MHz-1410 MHz and outputs intermediate-frequency signals with the frequency of 96 MHz; the down-conversion channel 2 performs down-conversion on channel signals of 1410 MHz-1450 MHz and outputs intermediate-frequency signals with the frequency of 96 MHz; the down-conversion channel 3 performs down-conversion on channel signals of 1450MHz to 1490MH and outputs intermediate frequency signals with the frequency of 96 MHz; the down-conversion channel 4 down-converts the channel signals of 1490 MHz-1516.667 MHz and outputs intermediate frequency signals with the frequency of 96 MHz.
After the radio frequency signals 1350MHz to 1518MHz of the second frequency band are processed by the second power division filtering module, 5 frequency band signals are respectively output, namely 1626.333MHz to 1653MHz, 1653MHz to 1679.667MHz, 1679.666MHz to 1706.333MHz, 1706.333MHz to 1746.333MHz and 1746.333MHz to 1773MHz are respectively output. The down-conversion channel 5 in the second frequency conversion channel module performs down-conversion on channel signals of 1626.333 MHz-1653 MHz and outputs intermediate-frequency signals with the frequency of 96 MHz; the down-conversion channel 6 carries out down-conversion on the channel signals of 1653 MHz-1679.667 MHz and outputs intermediate frequency signals with the frequency of 96 MHz; the down-conversion channel 7 performs down-conversion on channel signals of 1679.666 MHz-1706.333 MHz and outputs intermediate frequency signals with the frequency of 96 MHz; the down-conversion channel 8 performs down-conversion on the channel signals of 1706.333 MHz-1746.333 MHz and outputs intermediate frequency signals with the frequency of 96 MHz; the down-conversion channel 9 down-converts the channel signals of 1746.333MHz to 1773MHz and outputs an intermediate frequency signal with the frequency of 96 MHz. In the utility model, the channel bandwidth of the 96MHz intermediate frequency signal output by each down-conversion channel is-60 dBm-0 dBm.
In the present invention, the local oscillation module includes 9 point frequency sources, where each point frequency source provides a local oscillation signal for each channel of intermediate frequency signal output by the first frequency conversion channel module and each channel of intermediate frequency signal output by the first frequency conversion channel module; the frequency of the local oscillation signal provided by the local oscillation module is 120 MHz. As an example, the dot frequency source 1 in the present invention may be mixed with the down conversion channel 1; the dot frequency source 2 may mix with the down conversion channel 2; the dot frequency source 3 may mix with the down conversion channel 3; the dot frequency source 4 may mix with the down conversion channel 4; the dot frequency source 5 may mix with the down conversion channel 5; the dot frequency source 6 may be mixed with the down conversion channel 6; the dot frequency source 7 may be mixed with the down conversion channel 7; the dot frequency source 8 may be mixed with the down conversion channel 8; the dot frequency source 9 may be mixed with the down conversion channel 9.
As an example, as shown IN fig. 2, 4 independent antenna signals RF1_ IN1, RF1_ IN2, RF2_ IN1 and RF2_ IN2 are provided as radio frequency signals, wherein the frequency bands corresponding to the antenna signals RF1_ IN1 and RF1_ IN2 are 1350MHz to 1518 MHz; the frequency band corresponding to the antenna signal RF2_ IN1 and the antenna signal RF2_ IN2 is 1625MHz to 1785 MHz. IN the present embodiment, the antenna signals RF1_ IN1 and RF1_ IN2 respectively include 10 channels, and the antenna signals RF2_ IN1 and RF2_ IN2 respectively include 11 channels. As shown IN fig. 2, the 4 independent antenna signals are split into two groups of receivers, each group of receivers having an RF1_ IN and an RF2_ IN antenna signal. IN this embodiment, the RF1_ IN may be divided into 4 sub-segments, where 2 sub-segments contain 2 channel bandwidths and 2 sub-segments contain 3 channel bandwidths. And RF2_ IN may be divided into 5 subsections, where 4 subsections contain 2 channel bandwidths and 1 subsection contains 3 channel bandwidths; i.e. 9 sub-segments per group of receivers. Each group of receivers simultaneously carries out down-conversion on the 9 subsections, and 9 paths of 96MHz intermediate frequency signals are output to be processed by a digital processor at the rear end. The radio frequency signal is channelized and filtered by a power division filtering module consisting of a power divider and a filter, then a corresponding down-conversion channel is selected from a frequency conversion channel module, and after amplification, filtering, frequency mixing and gain control, an intermediate frequency signal with stable frequency is output for a back end to use, for example, a digital processor at the back end.
According to the above description, the present invention may further add a first-stage narrow-band acoustic-meter filter to the output end of each local oscillation signal in the local oscillation module, thereby enhancing the isolation of the local oscillation module. The frequency interval of two adjacent down-conversion channels can be increased, and the suppression of the filter in the power division filtering module to the frequency of the adjacent channel can be increased. Meanwhile, the amplitude of local oscillator frequency crosstalk to the port of the adjacent channel frequency mixer can be reduced. In addition, the utility model can also carry out gain control on the radio frequency end where the radio frequency signal is positioned, set the gain to 3 grades and switch through the switch, thereby ensuring that the down-conversion channel can not be compressed when the radio frequency signal with a larger frequency band is input. The utility model can also improve the output 1dB compression point of the amplifier to make the detection frontOutput P of two amplifiers-1Is +20dBm, further improving the output P of the amplifier-1To +30dBm, which can increase the power consumption and heat dissipation of the receiver and enhance the sensitivity of the receiver.
In summary, the present invention provides a multi-channel receiver, which can connect a first power division filtering module and a first frequency conversion channel module as a group of receivers, and connect a second power division filtering module and a second frequency conversion channel module as another group of receivers; each group of receivers in the utility model simultaneously carries out down-conversion on 9 subsections, and 9 paths of 96MHz intermediate frequency signals are output for processing by a digital processor at the rear end. The radio frequency signal is channelized and filtered by a power division filtering module consisting of a power divider and a filter, then a corresponding down-conversion channel is selected from a frequency conversion channel module, and after amplification, filtering, frequency mixing and gain control, an intermediate frequency signal with stable frequency is output for a back end to use, for example, a digital processor at the back end. In addition, the utility model integrates 18 channels and 18 channels local oscillators, and has simple and compact structure and high integration level; the full-band real-time receiving can be realized, and the requirement of a high-speed frequency hopping system is met. Meanwhile, the utility model can carry out multi-channel and large dynamic receiving, so the receiver provided by the utility model has good sensitivity and high isolation.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the utility model. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (7)
1. A multi-channel receiver, comprising:
the first power division filtering module is used for performing power division filtering on the radio-frequency signals of the first frequency band and forming multi-path frequency band signals;
the second power division filtering module is used for performing power division filtering on the radio-frequency signals of the second frequency band and forming multi-path frequency band signals;
the first frequency conversion channel module is used for carrying out down-conversion on each path of frequency band signal output by the first power division filtering module;
the second frequency conversion channel module is used for carrying out down-conversion on each path of frequency band signal output by the second power division filtering module;
the local oscillation module is used for providing local oscillation signals, and the local oscillation signals are used for carrying out frequency mixing with each path of intermediate frequency signals output by the first frequency conversion channel module and each path of intermediate frequency signals output by the second frequency conversion channel module to generate intermediate frequency signals with fixed frequency;
the first power division filtering module is connected with the first frequency conversion channel module, the second power division filtering module is connected with the second frequency conversion channel module, and the first frequency conversion channel module and the second frequency conversion channel module are both connected with the local oscillation module.
2. The multi-channel receiver of claim 1, wherein the first power division filtering module and the second power division filtering module at least comprise: a power divider and a filter.
3. The multi-channel receiver of claim 1 or 2, wherein the frequency of the first frequency band is smaller than the second frequency band, and the number of down-conversion channels in the first frequency conversion channel module is smaller than the second frequency conversion channel module.
4. The multi-channel receiver of claim 3, wherein the first band of RF signals is 1350MHz to 1518MHz and the second band of RF signals is 1625MHz to 1785 MHz.
5. The multi-channel receiver of claim 4, wherein the frequency band signal output by the first power division filtering module comprises: 1383.33 MHz-1410 MHz, 1410 MHz-1450 MHz, 1450 MHz-1490 MHz, 1490 MHz-1516.667 MHz;
the frequency band signal output by the second power division filtering module includes: 1626.333 MHz-1653 MHz, 1653 MHz-1679.667 MHz, 1679.666 MHz-1706.333 MHz, 1706.333 MHz-1746.333 MHz and 1746.333 MHz-1773 MHz.
6. The multi-channel receiver of claim 5, wherein the local oscillation module comprises 9 point frequency sources, wherein each point frequency source provides a local oscillation signal for each intermediate frequency signal output by the first frequency conversion channel module and each intermediate frequency signal output by the first frequency conversion channel module;
the frequency of the local oscillation signal provided by the local oscillation module is 120 MHz.
7. The multi-channel receiver of claim 6, wherein the frequency of each of the intermediate frequency signals output by the first frequency conversion channel module and the second frequency conversion channel module is 96 MHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122840923.6U CN216290874U (en) | 2021-11-18 | 2021-11-18 | Multi-channel receiver |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122840923.6U CN216290874U (en) | 2021-11-18 | 2021-11-18 | Multi-channel receiver |
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| CN216290874U true CN216290874U (en) | 2022-04-12 |
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| CN202122840923.6U Active CN216290874U (en) | 2021-11-18 | 2021-11-18 | Multi-channel receiver |
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- 2021-11-18 CN CN202122840923.6U patent/CN216290874U/en active Active
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