CN117375645A - Dual-band receiving system - Google Patents
Dual-band receiving system Download PDFInfo
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- CN117375645A CN117375645A CN202311207538.5A CN202311207538A CN117375645A CN 117375645 A CN117375645 A CN 117375645A CN 202311207538 A CN202311207538 A CN 202311207538A CN 117375645 A CN117375645 A CN 117375645A
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- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 230000035945 sensitivity Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000002955 isolation Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/12—Neutralising, balancing, or compensation arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/163—Special arrangements for the reduction of the damping of resonant circuits of receivers
Abstract
The application discloses dual-band receiving system, it includes first frequency channel module, second frequency channel module, switch module and intermediate frequency module, wherein: the signal output ends of the first frequency band module and the second frequency band module are connected with the signal input end of the switch module; the signal output end of the switch module is connected with the signal input end of the intermediate frequency module; the signal output end of the intermediate frequency module is connected with the rear end processor; the first frequency band module is configured to frequency-convert the first frequency band signal to the same frequency band as the second frequency band signal; the switching module is configured to switch and select the first frequency band signal or the second frequency band signal; the intermediate frequency module is configured to convert the passed signal to an intermediate frequency band. Through setting up first frequency channel module, with the frequency channel of first frequency channel signal frequency conversion to second frequency channel signal, again with second frequency channel signal sharing intermediate frequency circuit, reduced device quantity, realized the effect of reduce cost and equipment volume.
Description
Technical Field
The invention belongs to the technical field of microwaves, and particularly relates to a dual-band receiving system.
Background
The receiver is an indispensable key device of a modern wireless communication system, and after receiving signals transmitted by a transmitter, the receiver performs processes such as filtering, amplifying, frequency conversion and the like, and sends the frequency-converted intermediate frequency signals to a baseband for signal processing.
At present, the conventional receivers are all single-band receivers, cannot receive signals from different frequency bands, and have limited applicability, if a plurality of frequency band signals need to be received, the receivers of corresponding frequency bands need to be additionally arranged, so that the cost is increased.
Disclosure of Invention
In order to solve the problems in the related art, the application provides a dual-band receiving system which can receive signals in different frequency bands, so that the number of devices is reduced, and the cost is reduced.
The technical proposal is as follows:
the utility model provides a dual-band receiving system, its includes first frequency channel module, second frequency channel module, switch module and intermediate frequency module, wherein: the signal input end of the first frequency band module is configured to receive a first frequency band signal; the signal input end of the second frequency band module is configured to receive a second frequency band signal; the signal output ends of the first frequency band module and the second frequency band module are connected with the signal input end of the switch module; the signal output end of the switch module is connected with the signal input end of the intermediate frequency module; the signal output end of the intermediate frequency module is connected with the rear end processor; the first frequency band module is configured to frequency-convert the first frequency band signal to the same frequency band as the second frequency band signal; the switching module is configured to switch and select the first frequency band signal or the second frequency band signal; the intermediate frequency module is configured to convert the passed signal to an intermediate frequency band.
Through setting up first frequency channel module, with the frequency channel of first frequency channel signal frequency conversion to second frequency channel signal, again with second frequency channel signal sharing intermediate frequency circuit, reduced device quantity, realized the effect of reduce cost and equipment volume.
Further, the first frequency band module includes a first filter, a first amplifier, a first digitally controlled attenuator, a first mixer, a first local oscillator, and a second amplifier, wherein: the signal input end of the first filter is connected to the front-end antenna; the signal output end of the first filter is connected with the signal input end of the first amplifier; the signal output end of the first amplifier is connected with the signal input end of the first numerical control attenuator; the signal output end of the first numerical control attenuator is connected with the first signal input end of the first mixer; the second signal input end of the first mixer is connected with the signal output end of the first local oscillator; the signal output end of the first mixer is connected with the signal input end of the second amplifier; the signal output end of the second amplifier is connected with the signal input end of the switch module; the first mixer is configured to mix the first frequency band signal with a signal output by the first local oscillator, so that the first frequency band signal is shifted to a frequency band of the second frequency band signal.
Providing a first mixer with a required local oscillation frequency and local oscillation power through a local oscillation signal generated by a first local oscillator, so that the first mixer moves a first frequency band signal to a frequency band of a second frequency band signal; the purity of the set frequency band signal can be improved through the first filter, and the sensitivity and the dynamic range of the first frequency band module can be improved through the first numerical control attenuator and the first amplifier.
Further, the first filter is a band-pass filter.
Further, the first amplifier is a low noise amplifier.
Further, the second frequency band module includes a second filter, a third amplifier, and a second digital attenuator, wherein: the signal input end of the second filter is connected to the front-end antenna; the signal output end of the second filter is connected with the signal input end of the third amplifier; the signal output end of the third amplifier is connected with the signal input end of the second digital control attenuator; the signal output end of the second digital control attenuator is connected with the signal input end of the switch module.
Further, the switch module is a single pole double throw switch.
The single-pole double-throw switch is arranged as a switch module, so that the first frequency band signal and the second frequency band signal can be ensured to have high enough isolation.
Further, the intermediate frequency module comprises a second mixer, a second local oscillator, a third filter and a fourth amplifier, wherein: the first signal input end of the second mixer is connected with the signal output end of the switch module; the second signal input end of the second mixer is connected with the signal output end of the second local oscillator; the signal output end of the second mixer is connected with the signal input end of the third filter; the signal output end of the third filter is connected with the signal input end of the fourth amplifier; the signal output end of the fourth amplifier is connected with the back-end processor; the second mixer is configured to mix the signal selected by the switching module with the signal output by the second local oscillator, so that the signal selected by the switching module is shifted to the intermediate frequency band.
The intermediate frequency module can be arranged to move the received signals to the intermediate frequency band, so that the signal processing is convenient.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a circuit flow diagram of the present invention;
fig. 1 includes:
11. a first filter; 12. a first amplifier; 13. a first digitally controlled attenuator; 14. a first mixer; 15. a first local oscillator; 16. a second amplifier; 21. a second filter; 22. a third amplifier; 23. a second digital attenuator; 3. a switch module; 41. a second mixer; 42. a second local oscillator; 43. a third filter; 44. and a fourth amplifier.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the invention. Rather, they are merely examples of apparatus and methods consistent with aspects of the invention as detailed in the accompanying claims.
As shown in fig. 1:
a dual band receiving system comprising a first band module, a second band module, a switch module 3 and an intermediate frequency module, wherein: the signal input end of the first frequency band module is configured to receive a first frequency band signal; the signal input end of the second frequency band module is configured to receive a second frequency band signal; the signal output ends of the first frequency band module and the second frequency band module are connected with the signal input end of the switch module 3; the signal output end of the switch module 3 is connected with the signal input end of the intermediate frequency module; the signal output end of the intermediate frequency module is connected with the rear end processor; the first frequency band module is configured to frequency-convert the first frequency band signal to the same frequency band as the second frequency band signal; the switching module 3 is configured to switch selection of either the first frequency band signal or the second frequency band signal; the intermediate frequency module is configured to convert the passed signal to an intermediate frequency band.
The working process of the application is as follows:
the first frequency band module or the second frequency band module respectively receives signals of respective corresponding frequency bands; after the second frequency band module receives the signals, the signals pass through the switch module 3 and the intermediate frequency module, and the intermediate frequency module converts the signals to an intermediate frequency band and outputs the signals to the rear-end processor; after the first frequency band module receives the signals, the first frequency band module converts the signals to the frequency band which is the same as the second frequency band signals, and the intermediate frequency module converts the signals to an intermediate frequency band through the switch module 3 and the intermediate frequency module and outputs the signals to the back-end processor; after the signals of the first frequency band module and the second frequency band module are selected by the switch module 3, the signals share one channel of the intermediate frequency module for transmission.
Through setting up first frequency channel module, with the frequency channel of first frequency channel signal frequency conversion to second frequency channel signal, again with second frequency channel signal sharing intermediate frequency circuit, reduced device quantity, realized the effect of reduce cost and equipment volume.
In one possible embodiment, the first frequency band module comprises a first filter 11, a first amplifier 12, a first digitally controlled attenuator 13, a first mixer 14, a first local oscillator 15 and a second amplifier 16, wherein:
the signal input end of the first filter 11 is connected to the front-end antenna; the signal output end of the first filter 11 is connected to the signal input end of the first amplifier 12; the signal output end of the first amplifier 12 is connected with the signal input end of the first numerical control attenuator 13; the signal output end of the first numerical control attenuator 13 is connected to the first signal input end of the first mixer 14; the second signal input of the first mixer 14 is connected to the signal output of the first local oscillator 15; the signal output of the first mixer 14 is connected to the signal input of the second amplifier 16; the signal output end of the second amplifier 16 is connected with the signal input end of the switch module 3; the first mixer 14 is configured to mix the first frequency band signal with the signal output from the first local oscillator 15 so that the first frequency band signal shifts to the frequency band of the second frequency band signal.
The second amplifier 16 amplifies the converted signal to ensure that the signal entering the switch module 3 can be equal to the signal in the second frequency band. The local oscillator signal generated by the first local oscillator 15 provides the first mixer 14 with the required local oscillator frequency and local oscillator power, so that the first mixer 14 shifts the first frequency band signal to the frequency band of the second frequency band signal.
The first filter 11 is used for frequency preselection, and passes the first frequency band signal with smaller loss, so that signals outside the passband are suppressed to be higher, and the purity of the in-band signal is improved. The first amplifier 12 is a low noise amplifier providing a small noise figure and a suitable gain ensuring a better sensitivity of the receiver. The first digitally controlled attenuator 13 is used for gain control, and when a strong signal is input, the attenuator is made to attenuate maximally, and when a weak signal is input, the attenuator is made to attenuate minimally, so as to improve the dynamic range of the receiver. The purity of the set frequency band signal can be improved by the first filter 11, and the sensitivity and dynamic range of the first frequency band module can be improved by the first digital control attenuator 13 and the first amplifier 12.
In one possible embodiment, the first filter 11 is a bandpass filter.
In one possible embodiment, the first amplifier 12 is a low noise amplifier.
In a possible embodiment, the second frequency band module comprises a second filter 21, a third amplifier 22 and a second digital attenuator 23, wherein: the signal input end of the second filter 21 is connected to the front-end antenna; the signal output end of the second filter 21 is connected to the signal input end of the third amplifier 22; the signal output end of the third amplifier 22 is connected to the signal input end of the second digital control attenuator 23; the signal output of the second digital attenuator 23 is connected to the signal input of the switching module 3.
The second filter 21 is used for frequency preselection, and passes signals of the second frequency band with smaller loss, so that signals outside the passband are suppressed to improve the purity of the signals in the passband. The third amplifier 22 is a low noise amplifier providing a small noise figure and a suitable gain ensuring a better sensitivity of the receiver. The second digital attenuator 23 is used for gain control to maximize the attenuation of the attenuator when a strong signal is entered and to minimize the attenuation of the attenuator when a weak signal is entered, thereby increasing the dynamic range of the receiver.
In one possible embodiment, the switch module 3 is a single pole double throw switch.
The provision of a single pole double throw switch as the switch module 3 ensures a sufficiently high degree of isolation between the first frequency band signal and the second frequency band signal.
In a possible embodiment, the intermediate frequency module comprises a second mixer 41, a second local oscillator 42, a third filter 43 and a fourth amplifier 44, wherein: the first signal input end of the second mixer 41 is connected to the signal output end of the switch module 3; a second signal input of the second mixer 41 is connected to a signal output of the second local oscillator 42; the signal output terminal of the second mixer 41 is connected to the signal input terminal of the third filter 43; the signal output end of the third filter 43 is connected to the signal input end of the fourth amplifier 44; the signal output end of the fourth amplifier 44 is connected to the back-end processor; the second mixer 41 is configured to mix the signal selected by the switching module 3 with the signal output by the second local oscillator 42, so that the signal selected by the switching module 3 is shifted to the intermediate frequency band. The third filter 43 passes the intermediate frequency signal generated by the second mixer 41 with smaller insertion loss, and filters the spurious signal generated by the second mixer 41 with higher rejection degree, so as to ensure the purity of the signal in the receiver band. The fourth amplifier 44 amplifies the intermediate frequency signal to provide the desired signal amplitude for the back-end processor.
The intermediate frequency module can be arranged to move the received signals to the intermediate frequency band, so that the signal processing is convenient.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It is to be understood that the invention is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (7)
1. The utility model provides a dual-band receiving system, its characterized in that, dual-band receiving system includes first frequency channel module, second frequency channel module, switch module and intermediate frequency module, wherein:
the signal input end of the first frequency band module is configured to receive a first frequency band signal;
the signal input end of the second frequency band module is configured to receive a second frequency band signal;
the signal output ends of the first frequency band module and the second frequency band module are connected with the signal input end of the switch module;
the signal output end of the switch module is connected with the signal input end of the intermediate frequency module;
the signal output end of the intermediate frequency module is connected with the rear-end processor;
the first frequency band module is configured to frequency convert the first frequency band signal to the same frequency band as the second frequency band signal;
the switch module is configured to switch selection of either the first frequency band signal or the second frequency band signal;
the intermediate frequency module is configured to convert the passed signal to an intermediate frequency band.
2. The dual band receiving system of claim 1, wherein the first band module comprises a first filter, a first amplifier, a first digitally controlled attenuator, a first mixer, a first local oscillator, and a second amplifier, wherein:
the signal input end of the first filter is connected to the front-end antenna;
the signal output end of the first filter is connected with the signal input end of the first amplifier;
the signal output end of the first amplifier is connected with the signal input end of the first numerical control attenuator;
the signal output end of the first numerical control attenuator is connected with the first signal input end of the first mixer;
the second signal input end of the first mixer is connected with the signal output end of the first local oscillator;
the signal output end of the first mixer is connected with the signal input end of the second amplifier;
the signal output end of the second amplifier is connected with the signal input end of the switch module;
the first mixer is configured to mix the first frequency band signal with a signal output by the first local oscillator, so that the first frequency band signal is shifted to a frequency band of the second frequency band signal.
3. The dual band receiving system of claim 2 wherein the first filter is a bandpass filter.
4. The dual band receiving system of claim 2 wherein the first amplifier is a low noise amplifier.
5. The dual band receiving system of claim 1 wherein the second band module comprises a second filter, a third amplifier, and a second digital attenuator, wherein:
the signal input end of the second filter is connected to the front-end antenna;
the signal output end of the second filter is connected with the signal input end of the third amplifier;
the signal output end of the third amplifier is connected with the signal input end of the second digital control attenuator;
and the signal output end of the second digital control attenuator is connected with the signal input end of the switch module.
6. The dual band receive system of claim 1, wherein the switch module is a single pole double throw switch.
7. The dual band receiving system of claim 1, wherein the intermediate frequency module comprises a second mixer, a second local oscillator, a third filter, and a fourth amplifier, wherein:
the first signal input end of the second mixer is connected with the signal output end of the switch module;
the second signal input end of the second mixer is connected with the signal output end of the second local oscillator;
the signal output end of the second mixer is connected with the signal input end of the third filter;
the signal output end of the third filter is connected with the signal input end of the fourth amplifier;
the signal output end of the fourth amplifier is connected with the rear-end processor;
the second mixer is configured to mix the signal selected by the switch module with the signal output by the second local oscillator, so that the signal selected by the switch module is shifted to an intermediate frequency band.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311207538.5A CN117375645A (en) | 2023-09-19 | 2023-09-19 | Dual-band receiving system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311207538.5A CN117375645A (en) | 2023-09-19 | 2023-09-19 | Dual-band receiving system |
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| Publication Number | Publication Date |
|---|---|
| CN117375645A true CN117375645A (en) | 2024-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311207538.5A Pending CN117375645A (en) | 2023-09-19 | 2023-09-19 | Dual-band receiving system |
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| CN (1) | CN117375645A (en) |
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2023
- 2023-09-19 CN CN202311207538.5A patent/CN117375645A/en active Pending
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