CN209517111U - A kind of signal frequency split reception system - Google Patents
A kind of signal frequency split reception system Download PDFInfo
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- CN209517111U CN209517111U CN201920427509.2U CN201920427509U CN209517111U CN 209517111 U CN209517111 U CN 209517111U CN 201920427509 U CN201920427509 U CN 201920427509U CN 209517111 U CN209517111 U CN 209517111U
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Abstract
The utility model embodiment discloses a kind of signal frequency split reception system, it include: antenna, power adjustment device, frequency dividing device and first filter, the input terminal of the output end connection frequency dividing device of power adjustment device, the input terminal of the output end connection first filter of device is divided, the output end of first filter connects baseband system；Wherein, power adjustment device receives radiofrequency signal using antenna, and power adjustment device adjusts the power bracket and frequency dividing device matching of radiofrequency signal after power, and additional interference signal matches when the filter range of first filter is with frequency dividing device output intermediate-freuqncy signal.Device used in signal frequency split reception system disclosed in the utility model embodiment has antenna, power adjustment device, frequency dividing device and first filter, these devices small volume itself, and the signal frequency split receives system compared with prior art, device used is few, so overall volume is smaller, it is easily integrated and minimizes.
Description
Technical field
The utility model relates to signal processing technology fields, more specifically, being related to a kind of signal frequency split reception system.
Background technique
In the communication equipments such as radar, mobile phone, television set, realize that the reception of radiofrequency signal is necessary.In practical application
In, when communication equipment receives radiofrequency signal, for the work for keeping amplifier stable and reduce interference, convenient for putting in receivers
Radiofrequency signal frequency conversion need to be intermediate-freuqncy signal by big modulated signal.
Currently, in communication equipment usually using superhet by radiofrequency signal frequency conversion be intermediate-freuqncy signal.Specifically, surpass
There are two frequency mixers, each frequency mixer to be correspondingly arranged on local vibration source, filter and first stage amplifier for setting in heterodyne reciver.Its
In, two frequency mixers and corresponding local vibration source realize mixing function, and filter is spuious for inhibiting mixing, first stage amplifier to
The driving power requirement for meeting passive frequency mixer, finally obtains satisfactory intermediate-freuqncy signal with this.
The mode of implementation above frequency conversion, since the devices such as frequency mixer, local vibration source, filter and first stage amplifier need to be used,
Cause receiving system overall volume larger, it is difficult to integrated and miniaturization.
Utility model content
In view of this, the utility model embodiment discloses a kind of signal frequency split reception system, connect with solving existing signal
Receipts system overall volume is larger, it is difficult to the problem of integrating and minimizing.
The utility model embodiment discloses a kind of signal frequency split reception system, comprising: antenna, power adjustment device, frequency dividing
Device and first filter, the output end of the power adjustment device connect the input terminal of the frequency dividing device, the frequency divider
The output end of part connects the input terminal of the first filter, and the output end of the first filter connects baseband system；Wherein,
The power adjustment device receives radiofrequency signal using the antenna, radiofrequency signal after the power adjustment device adjustment power
Power bracket and the frequency dividing device matching, the filter range of the first filter and the frequency dividing device export intermediate-freuqncy signal
When the matching of additional interference signal.
Optionally, in a kind of specific embodiment of the utility model embodiment, the frequency dividing device is two-stage frequency dividing
Device.
Optionally, in a kind of specific embodiment of the utility model embodiment, the two-stage frequency dividing device can be realized
16 frequency dividings.
Optionally, in a kind of specific embodiment of the utility model embodiment, two-stage frequency dividing device includes the
One frequency divider, second filter and the second frequency divider, the input terminal of first frequency divider connect the power adjustment device
The output end of output end, first frequency divider connects the input terminal of the second filter, the output of the second filter
End connects the input terminal of second frequency divider, and the output end of second frequency divider connects the input of the first filter
End.
Optionally, in a kind of specific embodiment of the utility model embodiment, first frequency divider is 2 frequency dividings
Device, second frequency divider are 8 frequency dividers.
Optionally, in a kind of specific embodiment of the utility model embodiment, further includes: point frequency source and function clutch,
Two input terminals of the function clutch are separately connected the antenna and described frequency source, described in the output end connection of the function clutch
The input terminal of power adjustment device, described frequency source generate the frequency range of signal except the frequency range of radiofrequency signal.
Optionally, in a kind of specific embodiment of the utility model embodiment, described frequency source is fixed point frequency source.
Optionally, in a kind of specific embodiment of the utility model embodiment, the power adjustment device is limited width
Amplifier.
From above-mentioned technical solution it is found that the utility model embodiment discloses a kind of signal frequency split reception system, comprising:
Antenna, power adjustment device, frequency dividing device and first filter, the input of the output end connection frequency dividing device of power adjustment device
End, divides the input terminal of the output end connection first filter of device, and the output end of first filter connects baseband system；Its
In, power adjustment device receives radiofrequency signal using antenna, and power adjustment device adjusts the power bracket of radiofrequency signal after power
With frequency dividing device matching, the filter range and frequency dividing device of first filter export additional interference signal when intermediate-freuqncy signal
Match.Device used in signal frequency split reception system disclosed in the utility model embodiment has antenna, power adjustment device, frequency divider
Part and first filter, these devices small volume itself, and the signal frequency split receive system compared with prior art, device used
Part is few, so overall volume is smaller, is easily integrated and minimizes.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is the embodiments of the present invention, for those of ordinary skill in the art, without creative efforts, also
Other attached drawings can be obtained according to disclosed attached drawing.
Fig. 1 is a kind of structural schematic diagram of signal frequency split reception system disclosed in the utility model embodiment；
Fig. 2 is the structural schematic diagram that another kind signal frequency split disclosed in the utility model embodiment receives system；
Fig. 3 is the structural schematic diagram that another signal frequency split disclosed in the utility model embodiment receives system.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
The utility model embodiment discloses a kind of signal frequency split reception system, whole to solve existing receiving system
Volume is larger, it is difficult to the problem of integrating and minimizing.
It is a kind of structural schematic diagram of signal frequency split reception system disclosed in the utility model embodiment referring to Fig. 1.Such as figure
Shown in 1, a kind of signal frequency split disclosed in the utility model embodiment receive system include: antenna 11, power adjustment device 12, point
Frequency device 13 and first filter 14.
Wherein, the input terminal of the output end connection frequency dividing device 13 of power adjustment device 12, divides the output end of device 13
The input terminal of first filter 14 is connected, the output end of first filter 14 connects baseband system 15, specifically can linker band system
Base band ADC (Analog-to-Digital Converter, analog-digital converter) in system 15.Power adjustment device 12 utilizes day
Line 11 receives radiofrequency signal, and the power bracket of radiofrequency signal is matched with frequency dividing device 13 after the adjustment power of power adjustment device 12.
That is, power adjustment device 12 adjusts the power of radiofrequency signal, and adjusts after radiofrequency signal ingoing power adjusting device 12
The power of radiofrequency signal meets the reception requirement of frequency dividing device 13 afterwards.In practical applications, power adjustment device 12 can be limit
Spend amplifier, logafier etc..Here the illustratively detailed process by taking limit amplifier as an example: due to passing through limiting amplifier
Can be by input power range dynamic compression, when the input of the radiofrequency signal of small signal, limiting amplifier can be by signal power
It is amplified in frequency dividing 13 working range of device, when the input of the radiofrequency signal of big signal, limiting amplifier can be by signal power
It is restricted in frequency dividing 13 working range of device.If the input power range of radiofrequency signal is -60~0dBm, and divides device 13
The input power range of normal work be -20~10dBm, then the effect of limiting amplifier be exactly by input power range for -
The radiofrequency signal of 60~0dBm is adjusted to the signal that input power range is -20~10dBm.
In the utility model embodiment, the effect of frequency dividing device 13 is to divide the signal of input, and realization will penetrate
Frequency signal is converted into intermediate-freuqncy signal.In addition, the intermediate-freuqncy signal that frequency dividing device 13 exports usually is attached with the interference signals such as spuious.This
Utility model embodiment, which is used, is arranged first filter 14 after frequency dividing device 13 divides, to inhibit the interference signals such as spuious.Cause
This, additional interference signal matches when the filter range of first filter 14 is with the frequency dividing output intermediate-freuqncy signal of device 13.
Optionally, in a kind of specific embodiment of the utility model embodiment, frequency dividing device 13 can be two-stage point
Frequency device, to reach the purpose of saving space and control cost.It is understood that also can be used in other embodiments
Three-level divides device.In practical applications, such as the signal frequency split receives system and applies when on radar communication equipment, can be used
Realize that the two-stage of 16 frequency dividings divides device.
Optionally, as shown in Fig. 2, in a kind of specific embodiment of the utility model embodiment, two fractions are being used
When frequency device, it may include the first frequency divider 131, second filter 132 and the second frequency divider 133 that two-stage, which divides device,.Wherein,
The output end of the input terminal connection power adjustment device 12 of first frequency divider 131, the output end connection second of the first frequency divider 131
The input terminal of filter 132, the output end of second filter 132 connect the input terminal of the second frequency divider 133, the second frequency divider
The input terminal of 133 output end connection first filter 14.In practical applications, the first frequency divider can be 2 frequency dividers, second point
Frequency device is 8 frequency dividers, so, it can be achieved that 16 frequency dividings, convert intermediate-freuqncy signal for radiofrequency signal, and after first filter 14 most
The pure intermediate-freuqncy signal of whole output spectrum.During being somebody's turn to do, radiofrequency signal first passes through 2 frequency dividers and divides to obtain an intermediate-freuqncy signal,
It divides to obtain the intermediate-freuqncy signal of frequency meet demand using 8 frequency dividers after intermediate-freuqncy signal filtering, obtains base band after filter
The intermediate-freuqncy signal that DAC processing needs.
Certainly, the first frequency divider can be 4 frequency dividers, and the second frequency divider is 4 frequency dividers, to realize 16 frequency dividings, or even be
The frequency dividing device that can be realized more or less frequency dividings in practical application, can be set as needed.
In practical applications, frequency dividing device 13 is in the case where the radiofrequency signal of input is not continuous wave, it may occur that from humorous
Vibration phenomenon, can motivate higher noise at the time of no input signal.In this way, when the signal form of radiofrequency signal is pulse
When signal, at the time of there is no input signal, will occur that the feelings of radiofrequency signal and noise can not be differentiated after dividing device 13
Condition.For this purpose, in a kind of specific embodiment of the utility model embodiment, it can also be by way of frequency source be added
A continuous wave is generated, guarantees that the input of frequency dividing device 13 is constantly in the continuous state of signal, point frequency source frequency is penetrated in input
Except frequency signal frequency range, what frequency dividing device 13 generated after dividing spuious is inhibited by filter.It is such referring to Fig. 3
Under situation, it can also include: a frequency source 16 and function clutch 17 that signal frequency split, which receives system,.Wherein, two inputs of function clutch 17
End is separately connected antenna 11 and point frequency source 16, and the input terminal of the output end connection power adjustment device 12 of function clutch 17 puts frequency source
16 generate the frequency range of signal except the frequency range of radiofrequency signal.During being somebody's turn to do, radiofrequency signal and point frequency source 16 are generated
Continuous wave signal signal all the way is synthesized by function clutch 17, the signal after synthesis is adjusted by power adjustment device 12, satisfaction
Divide the normal range of operation of device 13.
Optionally, in a kind of specific embodiment of the utility model embodiment, point frequency source 16 can be fixed point frequency
Source.
It should be noted that in practical applications, the various embodiments of the utility model can carry out various combinations, such as at this
In one specific embodiment of utility model, the filter of the first frequency divider 131, second in Fig. 2 is can be used in the frequency dividing device 13 in Fig. 3
Wave device 132 and the second frequency divider 133.
From above-mentioned technical solution it is found that the utility model embodiment discloses a kind of signal frequency split reception system, comprising:
Antenna, power adjustment device, frequency dividing device and first filter, the input of the output end connection frequency dividing device of power adjustment device
End, divides the input terminal of the output end connection first filter of device, and the output end of first filter connects baseband system；Its
In, power adjustment device receives radiofrequency signal using antenna, and power adjustment device adjusts the power bracket of radiofrequency signal after power
With frequency dividing device matching, the filter range and frequency dividing device of first filter export additional interference signal when intermediate-freuqncy signal
Match.Device used in signal frequency split reception system disclosed in the utility model embodiment has antenna, power adjustment device, frequency divider
Part and first filter, these devices small volume itself, and the signal frequency split receive system compared with prior art, device used
Part is few, so overall volume is smaller, is easily integrated and minimizes.
Finally, it is to be noted that, herein, the terms "include", "comprise" or its any other variant are intended to
Cover non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or setting
Standby intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in the process, method, article or apparatus that includes the element.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
The foregoing description of the disclosed embodiments can be realized professional and technical personnel in the field or using originally practical new
Type.Various modifications to these embodiments will be readily apparent to those skilled in the art, and determine herein
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause
This, the present invention will not be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The widest scope consistent with features of novelty.
Claims (8)
1. a kind of signal frequency split receives system characterized by comprising antenna, power adjustment device, frequency dividing device and the first filter
Wave device, the output end of the power adjustment device connect the input terminal of the frequency dividing device, and the output end of the frequency dividing device connects
The input terminal of the first filter is connect, the output end of the first filter connects baseband system；Wherein, the power adjustment
Antenna described in devices use receives radiofrequency signal, the power bracket of radiofrequency signal and institute after the power adjustment device adjustment power
State additional interference when frequency dividing device matching, the filter range of the first filter and frequency dividing device output intermediate-freuqncy signal
Signal Matching.
2. signal frequency split according to claim 1 receives system, which is characterized in that the frequency dividing device is two-stage frequency divider
Part.
3. signal frequency split according to claim 2 receives system, which is characterized in that the two-stage frequency dividing device can realize 16
Frequency dividing.
4. signal frequency split according to claim 2 receives system, which is characterized in that the two-stage frequency dividing device includes first
Frequency divider, second filter and the second frequency divider, the input terminal of first frequency divider connect the defeated of the power adjustment device
The output end of outlet, first frequency divider connects the input terminal of the second filter, the output end of the second filter
The input terminal of second frequency divider is connected, the output end of second frequency divider connects the input terminal of the first filter.
5. signal frequency split according to claim 4 receives system, which is characterized in that first frequency divider is 2 frequency dividers,
Second frequency divider is 8 frequency dividers.
6. signal frequency split according to claim 1 receives system, which is characterized in that further include: point frequency source and function clutch, institute
Two input terminals for stating function clutch are separately connected the antenna and described frequency source, and the output end of the function clutch connects the function
The input terminal of rate adjusting device, described frequency source generate the frequency range of signal except the frequency range of radiofrequency signal.
7. signal frequency split according to claim 6 receives system, which is characterized in that described frequency source is fixed point frequency source.
8. described in any item signal frequency splits receive system according to claim 1~7, which is characterized in that the power regulator
Part is limiting amplifier.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920427509.2U CN209517111U (en) | 2019-03-29 | 2019-03-29 | A kind of signal frequency split reception system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920427509.2U CN209517111U (en) | 2019-03-29 | 2019-03-29 | A kind of signal frequency split reception system |
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| CN209517111U true CN209517111U (en) | 2019-10-18 |
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| CN201920427509.2U Active CN209517111U (en) | 2019-03-29 | 2019-03-29 | A kind of signal frequency split reception system |
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