CN103779639B - The square ring bimodulus double frequency filter that minor matters load - Google Patents
The square ring bimodulus double frequency filter that minor matters load Download PDFInfo
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- CN103779639B CN103779639B CN201410019016.7A CN201410019016A CN103779639B CN 103779639 B CN103779639 B CN 103779639B CN 201410019016 A CN201410019016 A CN 201410019016A CN 103779639 B CN103779639 B CN 103779639B
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Abstract
The invention discloses the square ring bimodulus double frequency filter that a kind of minor matters load, comprise two feeder lines be arranged on outside any two frames of Q-RING, diagonally to extend internally out four major branch nodel lines at four interior angles of Q-RING, the inwall of the parallel Q-RING of end of every bar major branch nodel line extends an open stub, the development length of this open-circuit stub is unequal, but four open-circuit stub physical dimensions are consistent, and arrange along the Central Symmetry of Q-RING.The square ring bimodulus double frequency filter that minor matters of the present invention load is when practical application, according to different communication situations and application needs, by the selection of each above-mentioned spot size parameter, realize the centre frequency of two passbands of adjustment double frequency filter, reach different application demands.
Description
Technical field
The invention belongs to microwave microstrip filter technical field, is by microstrip line making work square ring double frequency filter at multiple frequencies, is specifically related to the square ring bimodulus double frequency filter that a kind of minor matters load.
Background technology
The flourish living standard having driven the new civilization of the mankind also to improve the mankind of communication industry, people are also constantly proposing new communication standard and are developing new technology, such as from early stage GSM, CDMA, WCDMA TD-SCDMA till now, WLAN, WiMAX etc., frequency range divides more and more thinner, the service that operator is supplied to client is more and more complete, voice, data, video, online, global location is omnipotent, this makes life more convenient and abundant, but also more and more higher requirement is proposed to telecommunication system transceiver, such as need more miniaturized, integrated, high performance etc.
For wireless communication system, filter, at elimination image interference, attenuate acoustic noise, frequency division multiplexing and in high performance vibration, amplification, SHG and THG circuit, plays an important role.Along with the quickening day by day of IT application process, people are to the continuous pursuit of the speed of information transmission and quality, also constantly the convenient hommization of pursuit and high performance terminal equipment are constantly upgraded on the other hand, impelled microminiaturization and the integrability of the RF Components comprising filter, the radio-frequency filter simultaneously also creating various stuctures and properties meets the system requirements of small size, light weight further.
Although the developing history of filter is long, but the research for double frequency filter belongs to the emerging problem of just rising recently, especially from recent years, succeeding in developing of dual-band antenna and double frequency LNA, make oneself of microwave double frequency filter part in progressively coming into the market stage, up to the present, oneself is through proposing much novel double frequency filter structure.Because microstripline filter has small size, be easy to processing, be convenient to integrated feature, but also by adopting different backing materials to apply in very large frequency range, therefore the research report of external a lot of double frequency filter is all based on planar microstrip structure.2006, the Tsung-HuiHuang in Taiwan proposed the square ring bimodulus double frequency filter utilizing SIR structural design, two angles of Fang Huan also increases by two square perturbations and encourages two patterns, can obtain two required band connection frequencies.2007, Hu Huiling proposes a kind of co-planar waveguide (CPW) structure bimodulus square patch band pass filter, this filter adopts square patch as resonator, two of square patch symmetrical angles are opened two identical square corner cuts as perturbation, its degenerate mode be separated and produce coupling, paster and I/O CPW design respectively on the face that two of medium substrate different.Within 2009, Canadian ErickEmmanuelDjoumessi proposes a kind of multilayer bimodulus double frequency filter, ground floor and third layer cooperation provide the characteristic of dual mode filter, the second layer as publicly, by increasing square perturbation excitation degenerate mode at Fang Huan one jiao.2012, pay the gloomy method proposing the dual-mode resonator formation double-passband filter with large scale perturbation, have devised a kind of square resonant ring of capacitive load, the loading of minor matters is not only conducive to the miniaturization of resonant cavity but also effectively can changes the distribution of average current.
Summary of the invention
The object of this invention is to provide the square ring bimodulus double frequency filter that a kind of minor matters load, the double frequency filter centre frequency realized is respectively at 1.76GHz and 4.6GHz, encouraging two degenerate modes by introducing new perturbed structure, the filter application characteristic of bimodulus two-band miniaturization can have been realized.
The technical solution adopted in the present invention is, the square ring bimodulus double frequency filter that a kind of minor matters load, comprise Q-RING, a feeder line is respectively arranged with outside any two frames of Q-RING, diagonally to extend internally out four major branch nodel lines at four interior angles of Q-RING, the inwall of the parallel Q-RING of end of every bar major branch nodel line extends an open stub, and the development length of this open-circuit stub is unequal.
The square ring bimodulus double frequency filter that minor matters of the present invention load, is further characterized in that,
Open stub is altogether four right, and physical dimension is consistent, and arranges along the Central Symmetry of Q-RING.
The length of side of described Q-RING is 14 ± 2mm,
The major branch pitch length inside from Q-RING four interior angles is 2.12 ± 2mm,
Two open stub length of drawing to both sides from major branch nodel line are respectively 1.49 ± 0.5mm and 5.1 ± 0.5mm,
The width of Q-RING and every bar major branch nodel line is 0.5 ± 0.1mm;
The length of side of feeder line coupling edge is 10 ± 2mm, and width is 0.4 ± 0.2mm.
The invention has the beneficial effects as follows, innovative point is the double frequency filter to traditional side's annular, introduce a kind of new perturbed structure, namely encouraged two degenerate modes by the coupling space of two asymmetric minor matters lines, reached the filter characteristic of bimodulus two-band, make filter construction compacter, flexibly easy to adjust, can the various unwanted signal of filtering and noise signal effectively, reduce the signal disturbing between each communication channel, in the communication system of application, play a significant role.
Accompanying drawing explanation
Fig. 1 is the structural representation of the square ring bimodulus double frequency filter that minor matters of the present invention load;
Fig. 2 is the application mounting structure schematic diagram of side's ring bimodulus double frequency filter embodiment of the present invention;
Fig. 3 is the frequency response characteristic of the square ring bimodulus double frequency filter that minor matters of the present invention load.
In figure, 1. dual-band antenna, 2. amplifier one, 3. amplifier two, 4. minor matters load double frequency filter one, 5. lower frequency changer circuit, and 6. minor matters load double frequency filter two, 7. amplifier three, 8. with reference to crystal oscillator, 9. frequency synthesizer, 10.AGC module, 11.A/D changes, 12. microprocessors, 13. related channel programs, 14. memories, 15. Q-RINGs, 16. major branch nodel lines, 17. feeder lines, 18. open stub.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
With reference to Fig. 1, the square ring bimodulus double frequency filter that minor matters of the present invention load, its structure is, comprise Q-RING 15, a feeder line 17 is respectively arranged with outside any two frames of Q-RING 15, these two feeder lines 17 carry out feed by coupled structure square shaped ring 15, diagonally to extend internally out four major branch nodel lines 16 at four interior angles of Q-RING 15, (every bar major branch nodel line 16 and two contiguous Q-RING limits are in angle of 45 degrees), the inwall (to the left and right sides) of end (centripetal end) the parallel Q-RING 15 of every bar major branch nodel line 16 extends an open stub 18, the development length of this open-circuit stub 18 is unequal, but four open-circuit stub 18 physical dimensions are consistent, and arrange along the Central Symmetry of Q-RING 15, two degenerate modes just can have been encouraged by the coupling space adjusted between every two open stub 18.
The dimensional parameters scope of double frequency filter embodiment of the present invention is: the size dimension of Q-RING 15 is 14 ± 2mm, major branch nodel line 16 length inside from Q-RING 15 4 interior angles is 2.12 ± 2mm, two open stub 18 length of drawing to the left and right sides from major branch nodel line 16 are respectively 1.49 ± 0.5mm and 5.1 ± 0.5mm, the width of Q-RING 15 and every bar major branch nodel line 16 is 0.5 ± 0.1mm, the length of side of feeder line 17 coupling edge is 10 ± 2mm, and width is 0.4 ± 0.2mm.
The square ring bimodulus double frequency filter that minor matters of the present invention load is when practical application, according to different communication situations and application needs, by the selection of each above-mentioned spot size parameter, realize the centre frequency of two passbands of adjustment double frequency filter, reach different application demands.
Embodiment
With reference to Fig. 2, the square ring bimodulus double frequency filter that minor matters of the present invention load is applied in communication system receiver, the agent structure of this receiver is, comprise dual-band antenna 1, dual-band antenna 1 is connected with related channel program 13 by (double frequency low noise) amplifier 1, amplifier 23, minor matters loading double frequency filter 1, lower frequency changer circuit 5, minor matters loading double frequency filter 26, amplifier 37, A/D conversion 11 successively; In addition, with reference to crystal oscillator 8 by frequency synthesizer 9 and another input of lower frequency changer circuit 5() be connected, and amplifier 37 is provided with the AGC module 10 of carrying out FEEDBACK CONTROL; Related channel program 13 is also connected to each other with microprocessor 12 and memory 14 simultaneously, and microprocessor 12 and memory 14 are connected to each other.
Above-mentioned dual-band antenna 1 forms antenna element together with (double frequency low noise) amplifier 1;
Above-mentioned amplifier 23, minor matters load double frequency filter 1, lower frequency changer circuit 5, minor matters loading double frequency filter 26, amplifier 37, form lower frequency changer circuit unit with reference to crystal oscillator 8, frequency synthesizer 9 together with AGC module 10;
Above-mentioned A/D conversion 11, microprocessor 12, related channel program 13 form baseband signal processing unit together with memory 14.
It is consistent with the physical dimension that minor matters load double frequency filter 26 that minor matters load double frequency filter 1, as shown in Figure 1.
Amplifier 1, can select the MGA683P8 as Avago company, the SKY65047-360LF of Skyworks company, and amplifier 23 and amplifier 37 also can be the same models.
Lower frequency changer circuit 5, can select the RFX1200 daughter board of Ettusresearch company.
Baseband signal processing unit can select the general software radio platform USRP1 of Ettusresearch company.
These above-mentioned circuit modules or unit are all circuit systems, according to different application demands, other relevant concrete models can also be selected to carry out Combination Design.
The design parameter that two minor matters in the present embodiment load double frequency filter is: the length of side of Q-RING 15 is 14mm, four major branch nodel line 16 length is 2.12mm, is respectively 1.49mm and 5.1mm from major branch nodel line 16 two open stub 18 length to the left and right sides, the width of Q-RING 15 and every bar major branch nodel line 16 is 0.5mm, the length of side of feeder line 17 coupling edge is 10mm, width is 0.4mm, first passband central frequency is 1.76GHz, second passband central frequency is 4.6GHz, and input/output signal is connected with feeder line by coaxial input line.
When system works, first dual-band antenna 1 receives the faint signal of telecommunication from aerial, double frequency filter 1 is loaded via sending into minor matters after amplifier 1 amplifying signal power to desired level, lower frequency changer circuit 5 is entered after the various unwanted signal of filtering and noise signal, reduce the signal disturbing between each communication channel, meanwhile, with reference to crystal oscillator 8(TCXO) signal also enter lower frequency changer circuit 5 by frequency synthesizer 9; Need to select lower frequency changer circuit 5 that Received signal strength is down-converted to IF-FRE according to different application again, again load through minor matters the baseband signal processing unit finally sending into rear class after double frequency filter 26 through the self circular loop of amplifier 37, baseband signal processing unit completes the work for the treatment of of baseband signal.
With reference to Fig. 3, it is the frequency response characteristic of the square ring bimodulus double frequency filter embodiment that minor matters of the present invention load, the centre frequency of two passbands lays respectively at 1.76GHz and 4.6GHz, in band, differential loss is respectively 2.5dB and 0.6dB, the outer differential loss of first passband band is less than-50dB, the outer differential loss of second passband band is less than-20dB, and performance meets relevant technical requirement.
Claims (3)
1. the square ring bimodulus double frequency filter of a minor matters loading, it is characterized in that, comprise Q-RING (15), a feeder line (17) is respectively arranged with outside any two frames of Q-RING (15), diagonally to extend internally out four major branch nodel lines (16) at four interior angles of Q-RING (15), the end of every bar major branch nodel line (16) is parallel to two adjacent inner wall of Q-RING and extends a pair open stub (18), and the development length of this open-circuit stub (18) is unequal.
2. the square ring bimodulus double frequency filter that loads of minor matters according to claim 1, is characterized in that, described open stub (18) is altogether four right, and physical dimension is consistent, and arranges along the Central Symmetry of Q-RING (15).
3. the square ring bimodulus double frequency filter of minor matters loading according to claim 1, it is characterized in that, the length of side of described Q-RING (15) is 14 ± 2mm,
Major branch nodel line (16) length inside from Q-RING (15) four interior angles is 2.12 ± 2mm,
Two open stub (18) length of drawing to both sides from major branch nodel line (16) are respectively 1.49 ± 0.5mm and 5.1 ± 0.5mm,
The width of Q-RING (15) and every bar major branch nodel line (16) is 0.5 ± 0.1mm;
Article two, feeder line (17) is respectively provided with a coupling edge, and the length of side of each coupling edge is 10 ± 2mm, and width is 0.4 ± 0.2mm.
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Families Citing this family (6)
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| CN105785757B (en) * | 2016-04-28 | 2018-05-01 | 歌尔股份有限公司 | Wrist-watch antenna assembly and electronic watch |
| CN106656090A (en) * | 2016-12-21 | 2017-05-10 | 中国科学院微电子研究所 | On-chip filter circuit and an on-chip filter chip |
| CN107681235B (en) * | 2017-10-10 | 2020-06-09 | 成都大学 | Ultra-wideband band-pass filter with compact structure |
| CN107799857A (en) * | 2017-10-30 | 2018-03-13 | 成都大学 | A kind of compact-sized bimodule band-pass filter |
| CN110416674B (en) * | 2019-08-22 | 2024-03-22 | 华东师范大学 | Single-cavity double-frequency-band microwave filter based on coplanar waveguide |
| CN113991315B (en) * | 2021-12-27 | 2022-03-11 | 东南大学 | On-chip quadrilateral resonator based on artificial surface plasmon |
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