CN102868367B - Double balanced type frequency tripler - Google Patents
Double balanced type frequency tripler Download PDFInfo
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- CN102868367B CN102868367B CN201210398919.1A CN201210398919A CN102868367B CN 102868367 B CN102868367 B CN 102868367B CN 201210398919 A CN201210398919 A CN 201210398919A CN 102868367 B CN102868367 B CN 102868367B
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Abstract
The invention provides a double balanced type frequency tripler which at least comprises a first 90 degree input electrical bridge, two second 90 degree input electrical bridges, four frequency multiplier circuits, two negative 90 degree output electrical bridges and a combiner. The first 90 degree input electrical bridge works in a fundamental wave frequency band, the second 90 degree input electrical bridges both work in the fundamental wave frequency band and are connected with an output end of the first 90 degree input electrical bridge respectively, the frequency multiplier circuits are connected with an output end of one second 90 degree input electrical bridge respectively, the negative 90 degree output electrical bridges both work in triple harmonic frequency bands and are connected with output ends of two frequency multiplier circuits, and the combiner is connected with output ends of the two negative 90 degree output electrical bridges. The double balanced type frequency tripler has the advantages of being simple in structure, easy to integrate and low in requirements for process capability.
Description
Technical field
The present invention relates to technical field of micro communication, particularly relate to a kind of double-balance frequency tripler.
Background technology
Frequency multiplier is used to realize frequency multiplication, the fundamental frequency frequency multiplication of input in the harmonic frequency needed, makes it export the device of the harmonic power of needs.The introducing of frequency multiplier effectively can reduce local oscillator (LO) frequency, this is concerning millimeter-wave systems, alleviate the design needs of extremely high frequency local oscillator, extremely high frequency local oscillator is very harsh to technological requirement, the easy frequency of occurrences is unstable, the linearity is low, chip consistency is low and be difficult to directly phase-locked, so frequency multiplier can improve the stability of whole system and reduce costs.
Current millimere-wave band frequency tripler mainly adopts Schottky diode or heterogeneous joint potential barrier varactor as nonlinear device, simultaneously waveguiding structure and substrate integration wave-guide (SIW) structure are adopted in a large number in the millimeter wave frequency tripler of high band, and object utilizes the transmission characteristic of wave-guide cavity wave to realize first-harmonic in triple-frequency harmonics and the good rejection ability of second harmonic.But this non-planar surface process structure is by the miniaturization of extreme influence millimeter-wave systems, high integration and cost degradation.
Still the suppression problem solving each harmonic (comprising first-harmonic) except triple-frequency harmonics very well could not be reached at present based on the frequency tripler in planar technique, this directly affects frequency spectrum purity and three shg efficiencies of whole system, need extra complex match minor matters circuit or filter network to compensate, which increase circuit design difficulty and cost.In recent years, singly balanced formula frequency tripler obtains large quantity research because of its symmetrical structure, easy method for designing and succinct chip area, and its main topological structure has two kinds, as shown in Fig. 1 a and 1b.
Singly balanced formula frequency tripler is realized by a pair 180 °/180 ° or 90 °/90 ° electric bridges and a pair unit/terminal frequency multiplier circuit (XN).In general, the phase factor of input bridge (phase difference output a °) and output electric bridge (phase difference output b °) determines the output of N subharmonic.When meeting:
N×a
1+b×N≈360°×i
N rd harmonic signal will in output linear superposition.Wherein N is frequency, and i is integer.According to such theory analysis, in the output signal of 180 °/180 ° of electric bridges, even-order harmonic component will be cancelled out each other, and odd harmonic component (comprising first-harmonic and triple-frequency harmonics) will in output linear superposition; In the output signal of 90 °/90 ° of electric bridges, fundametal compoment will be cancelled out each other, and second harmonic component will be vector superposed at output, and the third-harmonic component of needs is by linear superposition.As can be seen here, but any output that all both can not realize first-harmonic in two kinds of topological structures suppresses the output also realizing even-order harmonic to suppress simultaneously, still external coupling minor matters circuit or filter is needed, this will affect the matching properties of non-linear unit, reduce the shg efficiency of triple-frequency harmonics and export the power of triple-frequency harmonics.
Summary of the invention
The shortcoming of prior art in view of the above, the object of the present invention is to provide a kind of double-balance frequency tripler with good each harmonic rejection ability.
For achieving the above object and other relevant objects, the invention provides a kind of double-balance frequency tripler, it at least comprises:
90 ° of first input bridge, it is operated in first-harmonic frequency range;
Connect two 90 ° of second input bridges of two outputs of described 90 ° of first input bridge respectively, be all operated in first-harmonic frequency range;
Input holds with 0 ° and 90 ° of described two 90 ° of second input bridges 4 frequency multiplier circuits be connected respectively;
Two-90 ° export electric bridge, described two-90 ° export-90 ° of inputs of electric bridges are connected 0 ° of frequency multiplier circuit held of described two 90 ° of second input bridges respectively output with input and connect, described two-90 ° export 0 ° of input of electric bridges is connected 90 ° of frequency multiplier circuits held of described two 90 ° of second input bridges respectively output with input and connect, and described two-90 ° output electric bridges are all operated in triple-frequency harmonics frequency range; And
Connect the homophase mixer that two-90 ° export bridge output;
Described electric bridge is 3db electric bridge.
Preferably, described 90 ° of first input bridge is identical with described 90 ° of second input bridge structure.
Preferably, described 90 ° of first input bridge comprises 3dB lange coupler.
Preferably, frequency multiplier circuit adopts the MOSFET single-tube circuit being operated in C class power amplifier region.
Preferably, described 90 ° of first input bridge comprises 3dB lange coupler.
Preferably, described mixer comprises Wilkinson power divider.
As mentioned above, the advantage of double-balance frequency tripler of the present invention comprises: all components and parts all can be realized by planar circuit technique, and structure is simple, is easy to integrated; In addition, do not needing, under external filter, good harmonic responses can be realized.
Accompanying drawing explanation
Fig. 1 a and 1b is shown as the singly balanced formula frequency tripler topological structure schematic diagram of prior art.
Fig. 2 is shown as double-balance frequency tripler topological structure schematic diagram of the present invention.
Fig. 3 is shown as the 3dB input bridge structural representation of 90 ° of double-balance frequency tripler of the present invention.
Fig. 4 is shown as the frequency multiplier circuit structural representation of double-balance frequency tripler of the present invention.
The 3dB that Fig. 5 is shown as-90 ° of double-balance frequency tripler of the present invention exports bridge structure schematic diagram.
Fig. 6 is shown as the combiner structure schematic diagram of double-balance frequency tripler of the present invention.
Embodiment
By particular specific embodiment, embodiments of the present invention are described below, person skilled in the art scholar the content disclosed by this specification can understand other advantages of the present invention and effect easily.
Refer to Fig. 2 to Fig. 6.Notice, structure, ratio, size etc. that this specification institute accompanying drawings illustrates, content all only in order to coordinate specification to disclose, understand for person skilled in the art scholar and read, and be not used to limit the enforceable qualifications of the present invention, therefore the not technical essential meaning of tool, the adjustment of the modification of any structure, the change of proportionate relationship or size, do not affecting under effect that the present invention can produce and the object that can reach, still all should drop on disclosed technology contents and obtain in the scope that can contain.Simultaneously, quote in this specification as " on ", D score, "left", "right", " centre " and " one " etc. term, also only for ease of understanding of describing, and be not used to limit the enforceable scope of the present invention, the change of its relativeness or adjustment, under changing technology contents without essence, when being also considered as the enforceable category of the present invention.
As shown in Figure 2, the invention provides a kind of double-balance frequency tripler.This double-balance frequency tripler at least comprises: three 3dB input 90 ° of electric bridges, are operated in first-harmonic frequency range, are respectively bridge 1, bridge 2 and bridge 3; Four symmetrical frequency multiplier circuits; Two 3dB export-90 ° of electric bridges, are operated in triple-frequency harmonics frequency range, are respectively bridge 4 and bridge 5; And the mixer of last output, be operated in triple-frequency harmonics frequency range.
The input of this double-balance frequency tripler is the input of bridge 1; 0 ° of bridge 1 exports the input of termination bridge 2; 90 ° of bridge 1 export the input of termination bridge 3; 0 ° of output of bridge 2 is connected with the input of frequency multiplier circuit 1, frequency multiplier circuit 2 respectively with 90 ° of outputs; 0 ° of output of bridge 3 is connected with the input of frequency multiplier circuit 3, frequency multiplier circuit 4 respectively with 90 ° of outputs; The output of frequency multiplier circuit 1, frequency multiplier circuit 2 is connected with 0 ° of input with-90 ° of inputs of bridge 4 respectively; The output of frequency multiplier circuit 3, frequency multiplier circuit 4 is connected with 0 ° of input with-90 ° of inputs of bridge 5 respectively; Bridge 4 is connected with two inputs of mixer respectively with the output of bridge 5, and the output of mixer is the output of frequency tripler.The output adopting double-balance frequency tripler of the present invention can realize higher first-harmonic and even-order harmonic suppresses, and rejection ratio is less with the change of process deviation simultaneously, and whole frequency tripler has miniaturization, easy of integrationization and cost degradation.
The course of work of the present invention is: radiofrequency signal enters double-balance frequency tripler by the input of bridge 1; 0 ° of phase place of constant amplitude and the two paths of signals of 90 ° of phase places is divided at the output of bridge 1; The signal of 0 ° of phase place enters the input of bridge 2, and the signal of 90 ° of phase places enters the input of bridge 3; At the output of bridge 2, the signal of 0 ° of phase place is divided into 0 ° of phase place of constant amplitude and the two paths of signals of 90 ° of phase places; At the output of bridge 3, the signal of 90 ° of phase places is divided into 90 ° of phase places of constant amplitude and the two paths of signals of 180 ° of phase places; 0 ° of phase signal of bridge 2 output enters frequency multiplier circuit 1; 90 ° of phase signals of bridge 2 output enter frequency multiplier circuit 2; 90 ° of phase signals of bridge 3 output enter frequency multiplier circuit 3; 180 ° of phase signals of bridge 3 output enter frequency multiplier circuit 4; Through the nonlinear change of frequency multiplier circuit, the output of frequency multiplier circuit 1 exports first-harmonic/second harmonic/harmonic signal that relative phase is respectively 0 °/0 °/0 °, the output of frequency multiplier circuit 2 exports first-harmonic/second harmonic/harmonic signal that relative phase is respectively 90 °/180 °/270 °, the output of frequency multiplier circuit 3 exports first-harmonic/second harmonic/harmonic signal that relative phase is respectively 90 °/180 °/270 °, and the output of frequency multiplier circuit 4 exports first-harmonic/second harmonic/harmonic signal that relative phase is respectively 180 °/0 °/180 °; First-harmonic/second harmonic/harmonic signal that frequency multiplier circuit 1 exports is respectively 270 °/270 °/270 ° at the output relative phase of bridge 4, first-harmonic/second harmonic/harmonic signal that frequency multiplier circuit 2 exports is respectively 90 °/180 °/270 ° at the output relative phase of bridge 4, like this, cancel out each other at the output fundamental signal of bridge 4, second harmonic is vector superposed, relative phase is 225 °, triple-frequency harmonics linear superposition, and relative phase is 270 °; First-harmonic/second harmonic/harmonic signal that frequency multiplier circuit 3 exports is respectively 90 °/180 °/270 ° at the output relative phase of bridge 5, first-harmonic/second harmonic/harmonic signal that frequency multiplier circuit 4 exports is respectively 180 °/0 °/180 ° at the output relative phase of bridge 5, like this, cancel out each other at the output fundamental signal of bridge 4, second harmonic is vector superposed, relative phase is 45 °, triple-frequency harmonics linear superposition, and relative phase is 180 °; The reverse second harmonic signal of constant amplitude linearly disappears mutually at the output of mixer 1, the orthogonal harmonic signal of constant amplitude is in the output vector addition of mixer 1, the third-harmonic component of needs is obtained like this in radio-frequency (RF) output end, simultaneously first-harmonic and second harmonic component radio-frequency (RF) output end all symmetry disappear mutually, rejection ratio is improved; Because the working frequency range of bridge 4 and bridge 5 is at triple-frequency harmonics, at the input of bridge 4 and bridge 5, most of component of first-harmonic and second harmonic all goes along with reflection comes back in frequency multiplier circuit, improves the efficiency that triple-frequency harmonics exports.
The realization of the device that double-balance frequency tripler comprises will be described below:
1) the 3dB input bridge of 90 ° of first-harmonic working frequency range
Because lange coupler has less area and relatively wide bandwidth of operation, select lange coupler as the 3dB input bridge of 90 ° of first-harmonic working frequency range, as shown in Figure 3, wherein 11 is input, 12 is 0 ° of coupled end, and 13 is 90 ° of coupled end, and 14 is isolation end.
2) frequency multiplier circuit
In this example, frequency multiplier circuit adopts the MOSFET single-tube circuit being operated in C class power amplifier region, it can produce each high-order harmonic wave component, as shown in Figure 4, wherein match circuit 1 and match circuit 2 are respectively the outfit of input and output, to obtain larger harmonic output power and delivery efficiency.
3) 3dB of-90 ° of triple-frequency harmonics working frequency range exports electric bridge
Because lange coupler has less area and relatively wide bandwidth of operation, select lange coupler as-90 ° of first-harmonic working frequency range 3dB export electric bridge, as shown in Figure 5, wherein 21 is output, 22 is 0 ° of couple input, and 23 is-90 ° of couple input, and 24 is isolation end.
4) triple-frequency harmonics working frequency range mixer
Adopt Wilkinson power divider as the mixer in this example, specifically as shown in Figure 6, wherein In1, In2 are respectively input, and Out is mixer output.
In sum, the double-balance frequency tripler that the present invention proposes, its advantage is compared with prior art:
1. in the present invention, utilize bridge 4 and bridge 5 to have larger echo reflection coefficient in first-harmonic frequency range, achieve the recycling that first-harmonic is reflected back frequency multiplier circuit, improve the efficiency that triple-frequency harmonics exports; Utilize the feature of double-balance, fundametal compoment linearly disappears with the output port of bridge 5 respectively mutually at bridge 4, achieves the suppression of fundametal compoment at output, reduces the impact of processes deviation on the suppression of fundametal compoment owing to have employed two balanced structure simultaneously.
2. in the present invention, utilize bridge 4 and bridge 5 to have larger echo reflection coefficient in first-harmonic frequency range, achieve the recycling that second harmonic is reflected back frequency multiplier circuit, improve the efficiency that triple-frequency harmonics exports; Utilize the feature of double-balance, second harmonic component, in the reverse constant amplitude of output port of bridge 4 and bridge 5, finally linearly disappears at the output port of mixer mutually; Not adopting under sheet outer filter or extra match circuit, achieve the suppression of first-harmonic and second harmonic simultaneously.
3. in the present invention, all components and parts all can be realized by planar circuit technique, do not need extra waveguide or SIW structure to carry out the low frequency component such as Fundamental wave suppression or second harmonic, achieve the miniaturization of circuit, easy of integrationization and cost degradation.
So the present invention effectively overcomes various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all without prejudice under spirit of the present invention and category, can modify above-described embodiment or changes.Therefore, such as have in art usually know the knowledgeable do not depart from complete under disclosed spirit and technological thought all equivalence modify or change, must be contained by claim of the present invention.
Claims (6)
1. a double-balance frequency tripler, is characterized in that, described double-balance frequency tripler at least comprises:
90 ° of first input bridge, it is operated in first-harmonic frequency range;
Connect two 90 ° of second input bridges of two outputs of described 90 ° of first input bridge respectively, be all operated in first-harmonic frequency range;
Input holds with 0 ° and 90 ° of described two 90 ° of second input bridges 4 frequency multiplier circuits be connected respectively;
Two-90 ° export electric bridge, described two-90 ° export-90 ° of inputs of electric bridges are connected 0 ° of frequency multiplier circuit held of described two 90 ° of second input bridges respectively output with input and connect, described two-90 ° export 0 ° of input of electric bridges is connected 90 ° of frequency multiplier circuits held of described two 90 ° of second input bridges respectively output with input and connect, and described two-90 ° output electric bridges are all operated in triple-frequency harmonics frequency range; And
Connect the homophase mixer that two-90 ° export bridge output;
Described electric bridge is 3db electric bridge.
2. double-balance frequency tripler according to claim 1, is characterized in that: described 90 ° of first input bridge is identical with described 90 ° of second input bridge structure.
3. double-balance frequency tripler according to claim 1 and 2, is characterized in that: described 90 ° of first input bridge comprises 3dB lange coupler.
4. double-balance frequency tripler according to claim 1, is characterized in that: frequency multiplier circuit adopts the MOSFET single-tube circuit being operated in C class power amplifier region.
5. double-balance frequency tripler according to claim 1, is characterized in that: described-90 ° of output electric bridges comprise 3dB lange coupler.
6. double-balance frequency tripler according to claim 1, is characterized in that: described mixer comprises Wilkinson power divider.
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| CN201210398919.1A CN102868367B (en) | 2012-10-18 | 2012-10-18 | Double balanced type frequency tripler |
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| CN201210398919.1A CN102868367B (en) | 2012-10-18 | 2012-10-18 | Double balanced type frequency tripler |
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| CN102868367B true CN102868367B (en) | 2015-02-18 |
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| CN110739922A (en) * | 2019-11-10 | 2020-01-31 | 扬州船用电子仪器研究所(中国船舶重工集团公司第七二三研究所) | ultra-wideband solid-state power amplifier synthesis circuit |
| CN111987993A (en) * | 2020-08-27 | 2020-11-24 | 中电科仪器仪表有限公司 | Broadband high-harmonic suppression terahertz three-balanced frequency doubler and method |
| CN111969955B (en) * | 2020-08-27 | 2023-05-09 | 中电科思仪科技股份有限公司 | Waveguide transmission line-based 0.5-0.75 THz broadband high-efficiency solid source and working method thereof |
| CN112615590A (en) * | 2020-12-18 | 2021-04-06 | 电子科技大学 | TSM-PI frequency tripler based on double-balanced frequency mixing |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5392014A (en) * | 1992-03-02 | 1995-02-21 | Fujitsu Limited | Frequency multiplier |
| JP2003264430A (en) * | 2002-03-08 | 2003-09-19 | Murata Mfg Co Ltd | Frequency four-multiplying method, frequency four- multiplying device and electronic apparatus using the same |
| CN102347729A (en) * | 2011-07-29 | 2012-02-08 | 西安空间无线电技术研究所 | Balanced type frequency tripler of substrate integrated waveguide (SIW) |
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2012
- 2012-10-18 CN CN201210398919.1A patent/CN102868367B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5392014A (en) * | 1992-03-02 | 1995-02-21 | Fujitsu Limited | Frequency multiplier |
| JP2003264430A (en) * | 2002-03-08 | 2003-09-19 | Murata Mfg Co Ltd | Frequency four-multiplying method, frequency four- multiplying device and electronic apparatus using the same |
| CN102347729A (en) * | 2011-07-29 | 2012-02-08 | 西安空间无线电技术研究所 | Balanced type frequency tripler of substrate integrated waveguide (SIW) |
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