CN103779639A - Branch-node-loading square-ring dual-mode dual-frequency filter - Google Patents
Branch-node-loading square-ring dual-mode dual-frequency filter Download PDFInfo
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- CN103779639A CN103779639A CN201410019016.7A CN201410019016A CN103779639A CN 103779639 A CN103779639 A CN 103779639A CN 201410019016 A CN201410019016 A CN 201410019016A CN 103779639 A CN103779639 A CN 103779639A
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Abstract
The invention discloses a branch-node-loading square-ring dual-mode dual-frequency filter which includes two feed lines which are arranged at the outer sides of any two borders of a square ring. Four main branch node lines extend inwards from the four inner corners of the square ring along the diagonal lines. A pair of open-circuit stub lines, parallel to the inner walls of the square ring, extends out from the tail end of each main branch line. The pair of open-circuit stub lines are not equal in extension length, but the four pairs of open-circuit stub lines are identical in structure size and are symmetrically arranged along the center of the square ring. When the branch-loading square-ring dual-mode dual-frequency filter is applied in practical, according to different communication occasions and application demands, through selection of size parameters of the different parts, center frequency adjustment of two passbands of the dual-frequency filter is realized so as to meet different application demands.
Description
Technical field
The invention belongs to microwave microstrip filter technical field, is to make by microstrip line the side's ring double frequency filter being operated under multiple frequencies, is specifically related to side's ring bimodulus double frequency filter that a kind of minor matters load.
Background technology
The flourish living standard that has driven the new civilization of the mankind also to promote the mankind of communication industry, people are also constantly proposing new communication standard and the new technology of exploitation, for example, from early stage GSM, CDMA, WCDMA TD-SCDMA till now, WLAN, WiMAX etc., frequency range is divided more and more thinner, it is more and more complete that operator offers client's service, voice, data, video, online, global location is omnipotent, this makes life more convenient and abundant, but also telecommunication system transceiver is proposed to more and more higher requirement, such as more miniaturization of needs, 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, the speed of people to communication and the continuous pursuit of quality, also constantly pursuing on the other hand convenient hommization and high performance terminal equipment constantly upgrades, impelled microminiaturization and the integrability of the RF Components including filter, the radio-frequency filter that has also produced various structures and performance simultaneously further meets the system requirements of small size, light weight.
Although the developing history of filter is long, but belong to the emerging problem of just rising recently for the research of double frequency filter, especially from recent years, succeeding in developing of dual-band antenna and double frequency LNA, make oneself of microwave double frequency filter part in coming into the market stage progressively, up to the present, oneself is through having proposed a lot of novel double frequency filter structures.Because microstripline filter has small size, be easy to processing, be convenient to integrated feature, and can also be by adopting different backing materials to apply in very large frequency range, therefore the research report of external a lot of double frequency filters is all take planar microstrip structure as basis.2006, the Tsung-Hui Huang in Taiwan proposed to utilize side's ring bimodulus double frequency filter of SIR structural design, also increases by two patterns of two square perturbation excitations on two angles of Fang Huan, 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, on two of square patch symmetrical angles, open two identical square corner cuts and make its degenerate mode separate and produce coupling as perturbation, paster and I/O CPW design respectively on two of medium substrate different faces.Within 2009, Canadian Erick Emmanuel Djoumessi has proposed a kind of multilayer bimodulus double frequency filter, ground floor and the 3rd laminated characteristic that dual mode filter is provided, the second layer is as publicly, by increasing square perturbation excitation degenerate mode at Fang Huan one jiao.2012, pay the gloomy method that has proposed the dual-mode resonator formation double-passband filter with large scale perturbation, designed 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 can effectively changes the distribution of average current.
Summary of the invention
The object of this invention is to provide side's ring bimodulus double frequency filter that a kind of minor matters load, the double frequency filter centre frequency realizing is respectively at 1.76GHz and 4.6GHz, encourage two degenerate modes by introducing new perturbed structure, can realize the filter application characteristic of bimodulus two-band miniaturization.
The technical solution adopted in the present invention is, side's ring bimodulus double frequency filter that a kind of minor matters load, comprise Q-RING, be respectively arranged with a feeder line in any two frames of Q-RING outside, at four interior angles of Q-RING along diagonal four the major branch nodel lines that extend internally out, the inwall of the parallel Q-RING of end of every major branch nodel line extends an open stub, and the development length of this open-circuit stub is unequal.
Side's ring bimodulus double frequency filter that minor matters of the present invention load, is further characterized in that,
Four pairs altogether of open stub, physical dimension is consistent, and along the Central Symmetry setting of Q-RING.
The length of side of described Q-RING is 14 ± 2mm,
The major branch nodel line length inside from four interior angles of Q-RING 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 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, encouraged two degenerate modes by the coupling space of two asymmetric minor matters lines, reach the filter characteristic of bimodulus two-band, make filter construction compacter, easy to adjust flexible, the various unwanted signals of filtering and noise signal effectively, the signal reducing between each communication channel disturbs, in the communication system of application, play a significant role.
Accompanying drawing explanation
Fig. 1 is the square structural representation that encircles 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 square frequency response characteristic that encircles 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 conversion, 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, side's ring bimodulus double frequency filter that minor matters of the present invention load, its structure is, comprise Q-RING 15, be respectively arranged with a feeder line 17 in any two frames of Q-RING 15 outside, these two feeder lines 17 carry out feed by coupled structure square shaped ring 15, at four interior angles of Q-RING 15 along diagonal four the major branch nodel lines 16 that extend internally out, (every major branch nodel line 16 with contiguous two Q-RING limits in angle of 45 degrees), the inwall (to the left and right sides) of the parallel Q-RING 15 of end (centripetal end) of every 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 along the Central Symmetry setting of Q-RING 15, two degenerate modes just can be encouraged by the coupling space of adjusting 18 of every two open stub.
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 15 4 interior angles of Q-RING are 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 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.
Side's ring bimodulus double frequency filter that minor matters of the present invention load is in the time of 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 adjusting double frequency filter, reach different application demands.
Embodiment
With reference to Fig. 2, side's ring bimodulus double frequency filter that minor matters of the present invention are loaded 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, pass through frequency synthesizer 9 and another input of lower frequency changer circuit 5(with reference to crystal oscillator 8) 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.
Lower frequency changer circuit 5, can select the RFX1200 daughter board of Ettus research company.
Baseband signal processing unit can be selected the common software radio platforms USRP1 of Ettus research company.
These above-mentioned circuit modules or unit are all circuit systems, according to different application demands, can also select other relevant concrete models 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 are 2.12mm, are 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 major branch nodel line 16 is 0.5mm, the length of side of feeder line 17 coupling edge is 10mm, width is 0.4mm, the first passband central frequency is 1.76GHz, the second passband central frequency is 4.6GHz, and input/output signal is connected with feeder line by coaxial input line.
In the time of system works, first dual-band antenna 1 is from the faint signal of telecommunication of aerial reception, after desired level, send into minor matters loading double frequency filter 1 via amplifier one 2 amplifying signal power, after the various unwanted signals of filtering and noise signal, enter lower frequency changer circuit 5, the signal reducing between each communication channel disturbs, 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 reception signal is down-converted to IF-FRE according to different application again, the baseband signal processing unit of again finally sending into rear class after minor matters load 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 square frequency response characteristic that encircles 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, outer be less than-the 50dB of differential loss of the first passband band, outer be less than-the 20dB of differential loss of the second passband band, performance meets relevant technical requirement.
Claims (3)
1. side's ring bimodulus double frequency filter that minor matters load, it is characterized in that, comprise Q-RING (15), be respectively arranged with a feeder line (17) in any two frames of Q-RING (15) outside, at four interior angles of Q-RING (15) along diagonal four the major branch nodel lines (16) that extend internally out, the inwall of the parallel Q-RING of end (15) of every major branch nodel line (16) extends an open stub (18), and the development length of this open-circuit stub (18) is unequal.
2. side's ring bimodulus double frequency filter that minor matters according to claim 1 load, is characterized in that, four pairs altogether of described open stub (18), and physical dimension is consistent, and along the Central Symmetry setting of Q-RING (15).
3. side's ring bimodulus double frequency filter that minor matters according to claim 1 load, is characterized in that, the length of side of described Q-RING (15) is 14 ± 2mm,
Major branch nodel line (16) length inside from (15) four interior angles of Q-RING is 2.12 ± 2mm,
Two open stub (18) length of drawing to both sides from major branch nodel line (16) is respectively 1.49 ± 0.5mm and 5.1 ± 0.5mm,
The width of Q-RING (15) and every 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.
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| CN201410019016.7A CN103779639B (en) | 2014-01-15 | 2014-01-15 | The square ring bimodulus double frequency filter that minor matters load |
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| CN201410019016.7A CN103779639B (en) | 2014-01-15 | 2014-01-15 | The square ring bimodulus double frequency filter that minor matters load |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105785757A (en) * | 2016-04-28 | 2016-07-20 | 歌尔声学股份有限公司 | Watch antenna device 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 |
| CN107681235A (en) * | 2017-10-10 | 2018-02-09 | 成都大学 | A kind of compact-sized ultra wide band bandpass filter |
| CN107799857A (en) * | 2017-10-30 | 2018-03-13 | 成都大学 | A kind of compact-sized bimodule band-pass filter |
| CN110416674A (en) * | 2019-08-22 | 2019-11-05 | 华东师范大学 | Single-chamber Dual-band microwave filter based on co-planar waveguide |
| CN113991315A (en) * | 2021-12-27 | 2022-01-28 | 东南大学 | On-chip quadrilateral resonator based on artificial surface plasmon |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105785757A (en) * | 2016-04-28 | 2016-07-20 | 歌尔声学股份有限公司 | Watch antenna device and electronic watch |
| 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 |
| CN107681235A (en) * | 2017-10-10 | 2018-02-09 | 成都大学 | A kind of compact-sized ultra wide band bandpass filter |
| CN107799857A (en) * | 2017-10-30 | 2018-03-13 | 成都大学 | A kind of compact-sized bimodule band-pass filter |
| CN110416674A (en) * | 2019-08-22 | 2019-11-05 | 华东师范大学 | Single-chamber Dual-band microwave filter based on co-planar waveguide |
| 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 |
| CN113991315A (en) * | 2021-12-27 | 2022-01-28 | 东南大学 | On-chip quadrilateral resonator based on artificial surface plasmon |
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Effective date of registration: 20171127 Address after: 518000 Guangdong Province, Shenzhen New District of Longhua City, Dalang street, Longsheng Gold Dragon Road community e-commerce incubator exhibition Tao Commercial Plaza E block 706 Patentee after: Shenzhen step Technology Transfer Center Co., Ltd. Address before: 710048 Shaanxi city of Xi'an Province Jinhua Road No. 5 Patentee before: Xi'an University of Technology |
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Effective date of registration: 20181018 Address after: 401120 98 east of Taishan Avenue, Yubei District, Chongqing, 236. Patentee after: Chongqing Pusheng Electromechanical Engineering Co., Ltd. Address before: 518000 Guangdong Shenzhen Longhua New District big wave street Longsheng community Tenglong road gold rush e-commerce incubation base exhibition hall E commercial block 706 Patentee before: Shenzhen step Technology Transfer Center Co., Ltd. |
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