CN202503486U - Broadband adaptive harmonic elimination device - Google Patents
Broadband adaptive harmonic elimination device Download PDFInfo
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- CN202503486U CN202503486U CN2012200134727U CN201220013472U CN202503486U CN 202503486 U CN202503486 U CN 202503486U CN 2012200134727 U CN2012200134727 U CN 2012200134727U CN 201220013472 U CN201220013472 U CN 201220013472U CN 202503486 U CN202503486 U CN 202503486U
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Abstract
The utility model relates to a broadband adaptive harmonic elimination device which comprises a first power divider (1), a first adjustable delay line (2), a main signal elimination module (3), a mirror frequency generation module (4) and a first combiner (5). An output terminal of the first power divider (1) is connected with an input terminal of the first adjustable delay line (2) and an input terminal of the main signal elimination module (3) respectively. An output terminal of the main signal elimination module (3) is connected with an input terminal of the mirror frequency generation module (4). An input terminal of the first combiner (5) is respectively connected with an output terminal of the first adjustable delay line (2) and an output terminal of the mirror frequency generation module (4). Compared with the prior art, the utility model has the advantages of adaptive adjustment, good portability, low cost, low difficulty of design and the like.
Description
Technical field
The utility model relates to a kind of harmonic wave abatement apparatus, especially relates to a kind of broadband self adaptation harmonic wave abatement apparatus.
Background technology
Along with the develop rapidly of radio communication, wide band transmitter and wide band receiver are applied to increasing occasion.For transmitter and receiver, harmonic wave all is an important index, in the design of transmitter and receiver, also all makes great efforts the harmonic wave of raising system self and eliminates ability, to promote the performance index of self.
Existing nowadays generally through the dual mode harmonic carcellation, first kind is to adjust filter with harmonic carcellation through electrically tunable filter or switch filter matrix according to the frequency of main signal; Second kind is through selecting the device or the parts of harmonic characterisitic preferably, relies on the performance of device or parts self to improve the elimination ability of harmonic wave.This dual mode produces the following problem in actual use:
1) for the method harmonic carcellation that adopts filtering near the signal of intermediate frequency, but because main signal frequency harmonic is nearer, design difficulty is big for filter, possibly realize hardly.
2), can pass through electrically tunable filter or switch filtering matrix harmonic carcellation, but along with the increase of main signal frequency, the complexity of design and cost can significantly improve all for high-frequency signal.
3) for adopting good nonlinear device or the parts of harmonic characterisitic, because receive manufacturing process and technology limitation now, in all band, reaching preferably for broadband signal, index possibly realize hardly.
4) this dual mode all can be along with the increase of service time, and factors such as external environment change make the characteristic variations of device such as filter, amplifier or parts, and can cause the harmonic characterisitic variation this moment, can only change device or component index and could recover normal.
The utility model content
The purpose of the utility model be exactly provide in order to overcome the defective that above-mentioned prior art exists that a kind of self adaptation adjustment, transplantability are good, cost and the low broadband self adaptation harmonic wave abatement apparatus of design difficulty.
The purpose of the utility model can realize through following technical scheme:
A kind of broadband self adaptation harmonic wave abatement apparatus; It is characterized in that; Comprise first power splitter, first variable delay line, main signal cancellation module, image frequency generation module and first mixer; The output of described first power splitter is connected with the input of first variable delay line, the input of main signal cancellation module respectively; The output of described main signal cancellation module is connected with the input of image frequency generation module, and the input of described first mixer is connected with the output of first variable delay line, the output of image frequency generation module respectively;
The main signal that described first power splitter will have harmonic wave is divided into the two paths of signals of constant amplitude homophase; One road signal is eliminated main signal after through the main signal cancellation module; And entering image frequency generation module generates the image frequency signal of harmonic wave; Another road is closed the road harmonic carcellation with image frequency signal at first mixer after getting into first variable delay line, generates pure main signal.
Described main signal cancellation module comprises second power splitter, amplifier, adjustable attenuator, second variable delay line, vector modulator and second mixer; The output of described second power splitter is connected with the input of amplifier input terminal, second variable delay line respectively; The output of described amplifier is connected with the input of adjustable attenuator; The output of described second variable delay line is connected with the input of vector modulator, and the input of described second mixer is connected with the output of adjustable attenuator, the output of vector modulator respectively;
Described second power splitter will be divided into the AB and the CD two paths of signals of constant amplitude homophase by wherein one road signal that first power splitter separates; Described AB road signal is adjusted amplitude through adjustable attenuator after amplifier amplifies; Described second variable delay line and vector modulator with CD road signal be adjusted into handle after AB road signal amplitude equate; The signal of phase phasic difference 180 degree closes the road through adjusted two paths of signals at second mixer and generates the harmonic signal of having eliminated main signal.
Described image frequency generation module comprises the 3rd power splitter, 90-degree phase shifter, quadrature modulator, the 3rd mixer and gain compensation amplifier; The output of described the 3rd power splitter is connected with the input of 90-degree phase shifter, the input of quadrature modulator respectively; The output of described 90-degree phase shifter is connected with the input of quadrature modulator; The output of described quadrature modulator is connected with the input of the 3rd mixer, and the output of described the 3rd mixer is connected with the gain compensation amplifier input terminal;
The harmonic signal that described the 3rd power splitter generates the main signal cancellation module is divided into the two paths of signals of constant amplitude homophase; One road signal is an I road signal; Another road signal is through the Q road signal of 90-degree phase shifter formation with I road signal in orthogonal; I road and Q road two paths of signals are through quadrature modulator adjustment amplitude and at the synthetic image frequency signal of the 3rd mixer, and described gain compensation amplifier carries out gain compensation to image frequency signal.
Described quadrature modulator is through the direct current input current on adjustment I road and Q road; Adjust the amplitude of I road and Q road two paths of signals in real time; And then the amplitude and the phase place of adjustment image frequency signal, image frequency signal with equate that through the harmonic signal amplitude behind first variable delay line phase phasic difference 180 is spent.
Described first variable delay line and second variable delay line are respectively applied for the output of adjustment first power splitter and second power splitter, the compensation transmission delay.
Compared with prior art, the utlity model has following advantage:
1) for broadband signal, do not need special filter circuit, just can eliminate the harmonic wave of main signal;
2) cost is low, and is portable good, applied widely;
The variation of the harmonic wave that 3) causes along with the variation of the use of transmitter or receiver and external environment, but the adjustment of the utility model real-time software need not changed device or parts;
4) reduce for nonlinear device in transmitter or the receiver or parts harmonic wave index request, can not receive the restriction of device property, reduced design cost, reduced design difficulty simultaneously.
Description of drawings
Fig. 1 is the structural representation of the self adaptation harmonic wave abatement apparatus of the utility model;
Fig. 2 is the structural representation of the main signal cancellation module of the utility model;
Fig. 3 is the structural representation of the image frequency generation module of the utility model.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is elaborated.
By shown in Figure 1; This equipment comprises first power splitter 1, first variable delay line 2, main signal cancellation module 3, image frequency generation module 4 and first mixer 5; The output of first power splitter 1 is connected with the input of first variable delay line 2, the input of main signal cancellation module 3 respectively; The output of main signal cancellation module 3 is connected with the input of image frequency generation module 4, and the input of described first mixer 5 is connected with the output of first variable delay line 2, the output of image frequency generation module 4 respectively;
The operation principle of this equipment is following: the main signal that first power splitter 1 will have a harmonic wave is divided into the two paths of signals of constant amplitude homophase; One road signal is eliminated main signal through main signal cancellation module 3 backs; And entering image frequency generation module 4 generates the image frequency signal of harmonic waves; Another road gets into first variable delay line, 2 backs and closes the road harmonic carcellation with image frequency signal at first mixer 5, generates pure main signal.Wherein first variable delay line 2 is used to adjust the output of first power splitter 1, the compensation transmission delay.
By shown in Figure 2; Main signal cancellation module 3 comprises second power splitter 31, amplifier 32, adjustable attenuator 33, second variable delay line 34, vector modulator 35 and second mixer 36; Wherein, The output of second power splitter 31 is connected with the input of amplifier 32, the input of second variable delay line 34 respectively; The output of amplifier 32 is connected with the input of adjustable attenuator (33), and the output of second variable delay line 34 is connected with the input of vector modulator 35, and the input of second mixer 36 is connected with the output of adjustable attenuator 33, the output of vector modulator (35) respectively;
The operation principle of this module is following: second power splitter 31 will be divided into the AB and the CD two paths of signals of constant amplitude homophase by wherein one road signal that first power splitter 1 separates; Wherein, AB road signal is adjusted amplitudes through adjustable attenuator 33 after amplifier 32 amplifies; CD road signal is successively through second variable delay line 34 and vector modulator 35 adjustment amplitude and phase places; Adjusted CD road signal with handle after AB road signal amplitude equate that phase phasic difference 180 degree close the harmonic signal that main signal has been eliminated in the road generation through adjusted two paths of signals at second mixer 36.Wherein second variable delay line 34 is used to adjust the output of second power splitter 31, the compensation transmission delay.
By shown in Figure 3; Image frequency generation module 4 comprises the 3rd power splitter 41,90-degree phase shifter 42, quadrature modulator 43, the 3rd mixer 44 and gain compensation amplifier 45; Wherein, The output of the 3rd power splitter 41 is connected with the input of 90-degree phase shifter 42, the input of quadrature modulator 43 respectively; The output of 90-degree phase shifter 42 is connected with the input of quadrature modulator 43, and the output of quadrature modulator 43 is connected with the input of the 3rd mixer 44, and the output of the 3rd mixer 44 is connected with the input of gain compensation amplifier 45;
The operation principle of this module is following: the harmonic signal that the 3rd power splitter 41 generates the main signal cancellation module is divided into the two paths of signals of constant amplitude homophase; One road signal is an I road signal; Another road signal is through the Q road signal of 90-degree phase shifter 42 formation with I road signal in orthogonal; I road and Q road two paths of signals carry out gain compensation through 44 pairs of image frequency signals of gain compensation amplifier, wherein at last through quadrature modulator 43 adjustment amplitudes and at the 3rd mixer 44 synthetic image frequency signals; Image frequency signal with equate phase phasic difference 180 degree through the harmonic signal amplitude behind first variable delay line 2.
Claims (3)
1. broadband self adaptation harmonic wave abatement apparatus; It is characterized in that; Comprise first power splitter (1), first variable delay line (2), main signal cancellation module (3), image frequency generation module (4) and first mixer (5); The output of described first power splitter (1) is connected with the input of first variable delay line (2), the input of main signal cancellation module (3) respectively; The output of described main signal cancellation module (3) is connected with the input of image frequency generation module (4), and the input of described first mixer (5) is connected with the output of first variable delay line (2), the output of image frequency generation module (4) respectively.
2. a kind of broadband self adaptation harmonic wave abatement apparatus according to claim 1; It is characterized in that; Described main signal cancellation module (3) comprises second power splitter (31), amplifier (32), adjustable attenuator (33), second variable delay line (34), vector modulator (35) and second mixer (36); The output of described second power splitter (31) is connected with the input of amplifier (32), the input of second variable delay line (34) respectively; The output of described amplifier (32) is connected with the input of adjustable attenuator (33); The output of described second variable delay line (34) is connected with the input of vector modulator (35), and the input of described second mixer (36) is connected with the output of adjustable attenuator (33), the output of vector modulator (35) respectively.
3. a kind of broadband self adaptation harmonic wave abatement apparatus according to claim 2; It is characterized in that; Described image frequency generation module (4) comprises the 3rd power splitter (41), 90-degree phase shifter (42), quadrature modulator (43), the 3rd mixer (44) and gain compensation amplifier (45); The output of described the 3rd power splitter (41) is connected with the input of 90-degree phase shifter (42), the input of quadrature modulator (43) respectively; The output of described 90-degree phase shifter (42) is connected with the input of quadrature modulator (43); The output of described quadrature modulator (43) is connected with the input of the 3rd mixer (44), and the output of described the 3rd mixer (44) is connected with the input of gain compensation amplifier (45).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200134727U CN202503486U (en) | 2012-01-12 | 2012-01-12 | Broadband adaptive harmonic elimination device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200134727U CN202503486U (en) | 2012-01-12 | 2012-01-12 | Broadband adaptive harmonic elimination device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202503486U true CN202503486U (en) | 2012-10-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200134727U Expired - Lifetime CN202503486U (en) | 2012-01-12 | 2012-01-12 | Broadband adaptive harmonic elimination device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202503486U (en) |
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2012
- 2012-01-12 CN CN2012200134727U patent/CN202503486U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121024 |