CN205141107U - A miniaturized circulator for 700MHz frequency channel communication system - Google Patents
A miniaturized circulator for 700MHz frequency channel communication system Download PDFInfo
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- CN205141107U CN205141107U CN201520757571.XU CN201520757571U CN205141107U CN 205141107 U CN205141107 U CN 205141107U CN 201520757571 U CN201520757571 U CN 201520757571U CN 205141107 U CN205141107 U CN 205141107U
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Abstract
The utility model discloses a miniaturized circulator for 700MHz frequency channel communication system, center conductor presss from both sides in the middle of the compound rotating magnetic field ferrite of two microwaves, center conductor's the three extreme point of drawing forth is guided to outside the three port of cavity, even magnetic sheet is placed in the compound rotating magnetic field ferrite of the microwave one side of contact center conductor not, strontium calcium permanent magnet provides invariable plus the bias magnetic field for the compound rotating magnetic field ferrite of microwave, place the one side at the compound rotating magnetic field ferrite of even magnetic sheet contactless microwave, the temperature compensating piece stacks on the strontium calcium permanent magnet of top, the opening part at the cavity is fixed as the apron to threaded magnetic circuit board, the appearance size of cavity is 19mm 8mm, working frequency band is 700MHz (being 698MHz~862MHz). The utility model discloses an integral structure has that the magnetic circuit closure is good, the size is little, the performance is excellent, the reliability is high, the characteristics of easy assembly.
Description
Technical field
The utility model relates to a kind of circulator, especially a kind of Miniature circulator for 700MHz frequency communication system.
Background technology
700MHz frequency range is in low-frequency range, has the characteristics such as quorum sensing inhibitor is wide, penetration power is strong, be applicable to the network coverage on a large scale, networking cost is low, therefore by internationally recognized be " digital bonus " frequency range.Under outdoor environment, the average signal strength 20dB stronger than 2.6GHz of 700MHz; Under indoor environment, the average signal strength 20dB ~ 30dB stronger than 2.6GHz of 700MHz.700MHz quorum sensing inhibitor radius is about 3 ~ 4 times of 2.6GHz, and area coverage is about 10 times of 2.6GHz.This makes 700MHz frequency range 4GTD-LTE networking cost greatly reduce compared to 2.6GHz frequency range 4GTD-LTE, about can save the investment of about 80%.
Existing circulator structures adopts discrete metal material to do shell usually, is fixed on cavity by polylith permeability magnetic material adhesive or screw, forms magnetic loop with cavity.This structure processing consumptive material is large, and magnetic circuit is not exclusively closed, and leakage field is comparatively large, and magnetic circuit efficiency is lower, overall device poor reliability, is difficult to the subminaturization of accomplishing structure.Consider the small form factor requirements of device, want to obtain wider bandwidth, generally all select around gyromagnetic ferrite, to overlap a PTFE medium ring, its DIELECTRIC CONSTANT ε
rbe only 2.05, make 1/4 wavelength transition wire longer, increase the size of circulator.
The lower wavelength of frequency is longer, 700MHz frequency range circulator length and width size is three times of 2.6GHz frequency range circulator in theory, 2.6GHz frequency range circulator standard size is 12.7mm × 12.7mm × 6.4mm, 700MHz frequency range circulator standard size is 38.1mm × 38.1mm × 12.7mm.
Fig. 1 is three end circulator schematic diagrames.The design concept of three desirable end circulators is based on scattering matrix theory, and collision matrix establishes the relation between incident wave and reflected wave.The central area that three end circulators are loaded by a microwave gyromagnetic ferrite and three transmission lines be coupled with it form, by changing the size of microwave gyromagnetic ferrite, saturation magnetic moment, dielectric constant, the geomery of additional Constant charge soil and center conductor, thus change the eigenvalue of collision matrix, form circulator.For desirable three end circulators, the electromagnetic wave of 1 port input can only export from 2 ports, and the electromagnetic wave of 2 port inputs can only export from 3 ports, and the electromagnetic wave of 3 port inputs can only export from 1 port.
Fig. 2 a is that circulator is for duplex system structural representation.The combination of circulator and up band pass filter BPFa, descending band pass filter BPFb, for transmitting-antenna-receiving system, this duplex system is alien frequencies receive-transmit system, is different from the ATR same-frequency duplexing device in Radar Technology.
Fig. 2 b is coupling and the decoupling schematic diagram of power amplifier inter-stage.In solid-state amplification system, the isolation of Cascade Amplifier stage is necessary, increases the stability of whole amplifier.
Fig. 2 c eliminates the mutual interference schematic diagram between emission source, and it is also be combined use with several bank of filters.Similar with above-mentioned inter-stage decoupling effect, difference is eliminate alien frequencies interference here.
Fig. 2 d is two-in-one antenna emission system schematic diagram.The emission source of two different frequencies is formed by two circulators and two filter banks.Also can become four-in-one, ten six directions one, this is very useful in cellular mobile telecommunications base station.
Utility model content
The purpose of this utility model is to overcome the deficiency that prior art exists, and provides that a kind of structure is simple, volume is little, is easy to the Miniature circulator being applicable to 700MHz frequency range 4GTD-LTE communication system that manufactures.
For solving the problems of the technologies described above, the technical scheme that the utility model is used for the Miniature circulator of 700MHz frequency communication system is, comprise cavity 1, be provided with successively from bottom to top in cavity 1: lower strontium calcium permanent magnet 21, lower even magnetic sheet 3, lower microwave compound gyromagnetic ferrite 41, center conductor 5, upper microwave compound gyromagnetic ferrite 42, upper even magnetic sheet 6, upper strontium calcium permanent magnet 21, temperature-compensating sheet 7, magnetic circuit plate 8, draw end points and guide to outside three ports of cavity 1 for three of center conductor 5, magnetic circuit plate 8 is provided with the opening part that screw thread is fixed on cavity 1, the profile size of cavity 1 is 19mm × 19mm × 8mm.
In technique scheme, strontium calcium permanent magnet provides constant applied bias magnetic field for microwave compound gyromagnetic ferrite.
In technique scheme, described its inside of microwave compound gyromagnetic ferrite is 4 π Ms is the gyromagnetic ferrite of 1600Gs ~ 1900Gs, and outer ring is DIELECTRIC CONSTANT ε
rit is the microwave ceramics ring of 25 ~ 28.
The aforesaid Miniature circulator for 700MHz frequency communication system, working frequency range is 700MHz, i.e. 698MHz ~ 862MHz.
The utility model is a kind of nonreciprocal Microwave Iron Oxide Elements, has the characteristic of one-way transmission high-frequency signal.Be mainly used in 700MHz frequency range 4GTD-LTE mobile communication base station, stand and in mobile station system, mainly as the sending and receiving letter antenna sharing apparatus of machine, duplexer or multiplexer, in transmitting and receiving system rate of doing work amplifier, switching amplifier input and output isolation and in measuring system, play decoupling effect.
The utility model has magnetic circuit and closes, and leakage field is little, and without the need to adhesive and screw, be easy to miniaturized, integrated level is high, and reliability is high, and overall device performance is good, is easy to the features such as manufacture, is applicable to 4GTD-LTE communication system.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of three end circulators;
Fig. 2 a is that circulator is for duplex system structural representation;
Fig. 2 b is coupling and the decoupling schematic diagram of power amplifier inter-stage;
Fig. 2 c eliminates the mutual interference schematic diagram between emission source;
Fig. 2 d is two-in-one antenna emission system schematic diagram;
Fig. 3 is the structural representation of Miniature circulator of the present utility model;
Fig. 4 is the microwave compound gyromagnetic ferrite schematic diagram that Miniature circulator of the present utility model adopts;
Fig. 5 is external form figure after the assembling of Miniature circulator of the present utility model.
Wherein: 1, cavity, 21, lower strontium calcium permanent magnet, 3, lower even magnetic sheet, 41, lower microwave compound gyromagnetic ferrite, 5, center conductor, 42, upper microwave compound gyromagnetic ferrite, 6, upper even magnetic sheet, 21, upper strontium calcium permanent magnet, 7, temperature-compensating sheet, 8, magnetic circuit plate.
Embodiment
Further illustrate how specifically to implement the utility model below in conjunction with accompanying drawing.
The present embodiment is used for the Miniature circulator of 700MHz frequency communication system, comprise in cavity 1, cavity 1 and being provided with successively from bottom to top: lower strontium calcium permanent magnet 21, lower even magnetic sheet 3, lower microwave compound gyromagnetic ferrite 41, center conductor 5, upper microwave compound gyromagnetic ferrite 42, upper even magnetic sheet 6, upper strontium calcium permanent magnet 21, temperature-compensating sheet 7, magnetic circuit plate 8, draw end points and guide to outside three ports of cavity 1 for three of center conductor 5, magnetic circuit plate 8 is provided with the opening part that screw thread is fixed on cavity 1, and the profile size of cavity 1 is 19mm × 19mm × 8mm.
Above-mentioned upper microwave compound gyromagnetic ferrite and lower microwave compound gyromagnetic ferrite, its inside is 4 π Ms is the gyromagnetic ferrite of 1600Gs ~ 1900Gs, and outer ring is DIELECTRIC CONSTANT ε
rbe the microwave ceramics ring of 25 ~ 28, as shown in Figure 5.Adopt high-dielectric constant microwave ceramic ring to have two advantages as medium, one is the geometrical length substantially reducing 1/4 wavelength transition wire; Two is that after application high-permittivity microwave medium ring, coupling angle reduces, and cut-off wave number KR value can be reduced to less than 1, and this further reduces again the diameter of gyromagnetic ferrite.
Fig. 5 is the circulator after assembling.
The key technical indexes of above-described embodiment sees the following form:
Above-described embodiment limits the utility model never in any form, the technical scheme that the form that all employings are equal to replacement or equivalent transformation obtains, and all drops within protection range of the present utility model.
Claims (1)
1. for the Miniature circulator of 700MHz frequency communication system, it is characterized in that, comprise cavity (1), cavity is provided with in (1) from bottom to top successively, lower strontium calcium permanent magnet (21), lower even magnetic sheet (3), lower microwave compound gyromagnetic ferrite (41), center conductor (5), upper microwave compound gyromagnetic ferrite (42), upper even magnetic sheet (6), upper strontium calcium permanent magnet (21), temperature-compensating sheet (7), magnetic circuit plate (8), draw end points and guide to outside three ports of cavity (1) for three of center conductor (5), magnetic circuit plate (8) is provided with the upper opening place that screw thread is fixed on cavity (1), the profile size of cavity (1) is 19mm × 19mm × 8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520757571.XU CN205141107U (en) | 2015-09-25 | 2015-09-25 | A miniaturized circulator for 700MHz frequency channel communication system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520757571.XU CN205141107U (en) | 2015-09-25 | 2015-09-25 | A miniaturized circulator for 700MHz frequency channel communication system |
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| CN205141107U true CN205141107U (en) | 2016-04-06 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108682928A (en) * | 2018-05-23 | 2018-10-19 | 优译有限公司 | A kind of radio communication circulator and isolator |
| CN110137649A (en) * | 2019-05-31 | 2019-08-16 | 深圳市诺信博通讯有限公司 | A kind of miniaturization 5G communication SMT radio frequency circulator |
| CN111129676A (en) * | 2020-01-14 | 2020-05-08 | 中国电子科技集团公司第九研究所 | Method for improving harmonic suppression performance of circulator and circulator |
-
2015
- 2015-09-25 CN CN201520757571.XU patent/CN205141107U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108682928A (en) * | 2018-05-23 | 2018-10-19 | 优译有限公司 | A kind of radio communication circulator and isolator |
| CN108682928B (en) * | 2018-05-23 | 2021-03-23 | 优译有限公司 | Radio frequency communication circulator and isolator |
| CN110137649A (en) * | 2019-05-31 | 2019-08-16 | 深圳市诺信博通讯有限公司 | A kind of miniaturization 5G communication SMT radio frequency circulator |
| CN111129676A (en) * | 2020-01-14 | 2020-05-08 | 中国电子科技集团公司第九研究所 | Method for improving harmonic suppression performance of circulator and circulator |
| CN111129676B (en) * | 2020-01-14 | 2022-01-21 | 中国电子科技集团公司第九研究所 | Method for improving harmonic suppression performance of circulator and circulator |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CP01 | Change in the name or title of a patent holder |
Address after: 211132, No. three, No. seven, Tangshan industrial concentration area, Tangshan District, Jiangsu, Nanjing, Jiangning Patentee after: Nanjing Guangshun Electronic Technology Research Institute Co.,Ltd. Address before: 211132, No. three, No. seven, Tangshan industrial concentration area, Tangshan District, Jiangsu, Nanjing, Jiangning Patentee before: NANJING GUANGSHUN ELECTRONIC TECHNOLOGY Research Institute |