CN201266663Y - Embedded high intermodulation circulator for TD-SCDMA system - Google Patents
Embedded high intermodulation circulator for TD-SCDMA system Download PDFInfo
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- CN201266663Y CN201266663Y CNU2008201603701U CN200820160370U CN201266663Y CN 201266663 Y CN201266663 Y CN 201266663Y CN U2008201603701 U CNU2008201603701 U CN U2008201603701U CN 200820160370 U CN200820160370 U CN 200820160370U CN 201266663 Y CN201266663 Y CN 201266663Y
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- cover plate
- scdma system
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Abstract
The utility model discloses an embedded high intermodulation circulator applied to TD-SCDMA system, which comprises a ferruginous cavity, two microwave ferrites, a center conductor, a shield sheet, a permanent magnet, a uniform magnetic sheet, a first temperature compensating plate, a second temperature compensating plate and a cover plate, wherein, the center conductor is clamped between the two microwave ferrites; three leads of the center conductor are led out of the ferruginous cavity; the shield sheet, the permanent magnet, the uniform magnetic sheet, the first temperature compensating plate and the second temperature compensating plate are stacked sequentially on the second microwave ferrite; the circulator is characterized in that the ferruginous cavity is an integrated cavity, the cover plate is provided with external thread, the inner side of the upper opening of the ferruginous cavity is provided with thread that can match with the external thread on the cover plate, and the cover plate can be screwed into the ferruginous cavity and fixed at the opening of the ferruginous cavity. The embedded high intermodulation circulator applied to TD-SCDMA system has the advantages of better magnetic circuit closure and less magnetic flux leakage, thus increasing the intermodulation and reliability.
Description
Technical field
The utility model relates to a kind of embedded high intermodulation circulator, especially the embedded high intermodulation circulator that relates to a kind of TD-SCDMA of being used for system, belong to the microwave ferrite technical field, in TD-SCDMA system base-station and mobile station system, mainly make the composite device of sending and receiving letter machine; Isolate in the input that transmits and receives system's rate of doing work amplifier, switching amplifier, output; In measuring system, play the decoupling effect.
Background technology
Passive intermodulation (Passive Inter-Modulation), be called for short PIM, produced by the non-linear factor in the passive device, in high-power, multichannel system, the non-linear factor of passive device (comprising circulator) can make each operating frequency mix to produce that one group of new frequency, its final result are exactly to produce one group of useless frequency spectrum aloft and influence normal communication.
Fig. 1 is the fundamental diagram of isolator of the prior art; Fig. 2 is the fundamental diagram of three end junction circulators of the prior art.Isolator is a two-port device, and to output b, the energy attenuation of transmission is less from input a for signal, and signal then is high decay from output b to input a, is absorbed by the isolator load.The design concept of three desirable end junction circulators is based on scattering matrix theory, and collision matrix is set up the incident wave that finishes and the relation between the reflected wave.Three end junction circulators are made up of central area and three transmission lines that are coupled with it that a gyromagnetic ferrite loads, size, saturation magnetic moment, dielectric constant by changing gyromagnetic ferrite, the geomery that adds permanent magnetic field and center conductor change the eigenvalue of collision matrix, form circulator.For desirable three end junction circulators, the electromagnetic wave of c port input can only be exported from the d port; The electromagnetic wave of d port input can only be exported from the e port; And the electromagnetic wave of e port input can only be exported from the c port.Isolator is to extend from three-port circulator, just adds that at a port matched load (load of little reflection termination) forms.
Circulator and isolator can be made coaxial, little band, various ways such as band line, waveguide, are used for various electromagnetic transmission system.Fig. 3 is for adopting the duplex system fundamental diagram of circulator.Circulator and up band pass filter BPFa, descending band pass filter BPFb combination are used for emission-antenna-receiving system.This duplex system is the alien frequencies receive-transmit system, to be different from the same duplexer frequently of ATR in the Radar Technology.T is a transmitter among Fig. 3, and R is a receiver, and ANT is an antenna.
Fig. 4 is the structural representation of existing embedded circulator.Do shell with discrete permeability magnetic material, first permeability magnetic material, 1 usefulness adhesive is glued at cavity 2 places.In cavity 2, pack into the successively first microwave ferrite 3a (not being with the ceramic ring medium), center conductor 4, the second microwave ferrite 3b, magnetic conduction disk 5, magnetic conduction disk 6, temperature-compensating sheet 7 and permanent magnet 8, upper and lower both sides are respectively second permeability magnetic material 9 and the 3rd permeability magnetic material 10, the second permeability magnetic materials 9 and the 3rd permeability magnetic material 10 and are screwed respectively on cavity 2.Permanent magnet provides bias magnetic field for ferrite, and center conductor has three to draw end points, is introduced to respectively outside three ports of cavity 2.This structure uses adhesive and screw on cavity by the polylith permeability magnetic material, constitutes magnetic loop with cavity.This structure processing consumptive material is big, and magnetic circuit is not exclusively closed, and leakage field is bigger, and anti-external interference ability is relatively poor, and magnetic circuit efficient is low, device bulk temperature poor-performing, and generally about 1.5, intermodulation performance is lower in the normalization internal field, can not satisfy the demand of high intermodulation system.
The utility model content
Technical problem to be solved in the utility model provides the high embedded high intermodulation circulator that is used for the TD-SCDMA system of a kind of intermodulation performance;
Another technical problem to be solved in the utility model provides and a kind ofly is easy to assembling, cost is lower, the embedded high intermodulation circulator that is used for the TD-SCDMA system of little insertion loss.
For solving the problems of the technologies described above, the utility model provides the embedded high intermodulation circulator of a kind of TD-SCDMA of being used for system, comprise: the irony cavity, first microwave ferrite, second microwave ferrite, center conductor, shield blade, permanent magnet, even magnetic sheet, the first temperature-compensating sheet, second temperature-compensating sheet and the cover plate, center conductor is clipped in the middle of two microwave ferrites, three lead-in wires of center conductor are introduced to outside the irony cavity, shield blade, permanent magnet, even magnetic sheet, the first temperature-compensating sheet, the second temperature-compensating sheet overlays on second microwave ferrite successively, it is characterized in that: the integrated cavity of described irony cavity, has external screw thread on the described cover plate, have the screw thread that matches with external screw thread on the cover plate in the inboard of the upper opening of described irony cavity, but cover plate precession irony cavity and be fixed on the opening part of irony cavity.
The beneficial effect that the utility model reached:
Compared with prior art, the embedded high intermodulation circulator that is used for the TD-SCDMA system of the present utility model is owing to adopt integrated cavity, so the magnetic circuit closure is good, leakage field is little, and intermodulation and reliability improve.
Description of drawings
Fig. 1 is the fundamental diagram of isolator of the prior art;
Fig. 2 is the fundamental diagram of three end junction circulators of the prior art;
Fig. 3 is the fundamental diagram of the duplex system of employing circulator;
Fig. 4 is existing embedded annular device structural representation;
Fig. 5 is the structural representation that is used for the embedded high intermodulation circulator of TD-SCDMA system of the present utility model;
Fig. 6 is the outline drawing of the embedded high intermodulation circulator assembling of the TD-SCDMA of being used for of the present utility model system after finishing.
Embodiment
Fig. 5 is the structural representation that is used for the embedded high intermodulation circulator of TD-SCDMA system of the present utility model;
Fig. 6 is the outline drawing of the embedded high intermodulation circulator assembling of the TD-SCDMA of being used for of the present utility model system after finishing.
The embedded high intermodulation circulator of the TD-SCDMA of being used for of the present utility model system comprises: irony cavity 2, the first microwave ferrite 3a, the second microwave ferrite 3b, center conductor 4, shield blade 11, permanent magnet 8, even magnetic sheet 12, the first temperature-compensating sheet 7a, the second temperature-compensating sheet 7b and cover plate 14, center conductor 4 is clipped in the middle of two microwave ferrites, three lead-in wires of center conductor 4 are introduced to outside the irony cavity 2, shield blade, permanent magnet, even magnetic sheet, the first temperature-compensating sheet, the second temperature-compensating sheet overlays on the second microwave ferrite 3b successively, it is characterized in that: described irony cavity 2 integrated cavitys, has external screw thread on the described cover plate 14, have the screw thread that matches with external screw thread on the cover plate 14 in the inboard of the upper opening of described irony cavity 2, but cover plate 14 precession irony cavitys 2 and be fixed on the opening part of irony cavity 2.The screw that has so replaced former circulator, external magnetic circuit replaces with incorporate irony cavity, simplifies the structure greatly.
As further improvement of the utility model, also comprise the first PTFE medium ring 13a and the second PTFE medium ring 13b, the described first microwave ferrite 3a is enclosed among the first PTFE medium ring 13a, and the second microwave ferrite 3b is enclosed among the second PTFE medium ring 13b.
In addition, the overall dimensions of the embedded high intermodulation circulator of the TD-SCDMA of being used for of the present utility model system are 19mm * 19mm * 8mm, and its groundwork frequency range is 2010-2025MHz, and can expand to 1.7～2.5GHz frequency band any one section.
As further improvement of the utility model, first microwave ferrite of the embedded high intermodulation circulator of the TD-SCDMA of being used for system of the present utility model and the material of second microwave ferrite are garnet material, be of a size of Φ 14.7mm * 1mm, guarantee that device has bigger gyromagnetic effect, do not contact the one side roasting silver of center conductor.Center conductor, shield blade, even magnetic sheet electroplate guarantee that ground connection is good in addition, reduce the insertion loss of device.
In addition, the embedded high intermodulation circulator externally-applied magnetic field of the TD-SCDMA of being used for system of the present utility model is the samarium cobalt permanent magnet body, and promptly permanent magnet 8 is the samarium cobalt permanent magnet body, both can guarantee the strong bias-field that the high intermodulation of device is required, can improve the antijamming capability of device again.
The embedded high intermodulation circulator of TD-SCDMA system that is used for of the present utility model is in High-Field work, the normalization internal field is 2.4, away from ferritic resonant fields work, guarantee that device can obtain higher intermodulation value, intermodulation is-87dBc, because intermodulation is higher, has reduced the non-linear interference to communication system by device.
Protection range of the present utility model is not limited to the scope of specific embodiment, and the distortion that is no more than in the utility model thought range that described embodiment is made all belongs to protection range of the present utility model with application.
Claims (6)
1. embedded high intermodulation circulator that is used for the TD-SCDMA system, comprise: irony cavity (2), first microwave ferrite (3a), second microwave ferrite (3b), center conductor (4), shield blade (11), permanent magnet (8), even magnetic sheet (12), the first temperature-compensating sheet (7a), the second temperature-compensating sheet (7b) and cover plate (14), center conductor (4) is clipped in the middle of two microwave ferrites, three lead-in wires of center conductor (4) are introduced to outside the irony cavity (2), shield blade, permanent magnet, even magnetic sheet, the first temperature-compensating sheet, the second temperature-compensating sheet overlays on second microwave ferrite (3b) successively, it is characterized in that: the integrated cavity of described irony cavity (2), described cover plate has external screw thread on (14), have the screw thread that matches with external screw thread on the cover plate (14) in the inboard of the upper opening of described irony cavity (2), cover plate (14) but precession irony cavity (2) and be fixed on the opening part of irony cavity (2).
2. the embedded high intermodulation circulator that is used for the TD-SCDMA system according to claim 1, it is characterized in that: also comprise the first PTFE medium ring (13a) and the second PTFE medium ring (13b), described first microwave ferrite (3a) is enclosed within the first PTFE medium ring (13a), and second microwave ferrite (3b) is enclosed within the second PTFE medium ring (13b).
3. the embedded high intermodulation circulator that is used for the TD-SCDMA system according to claim 1, it is characterized in that: its bulk shape is of a size of 19mm * 19mm * 8mm.
4. the embedded high intermodulation circulator that is used for the TD-SCDMA system according to claim 3 is characterized in that: the material of described first microwave ferrite (3a) and second microwave ferrite (3b) is a garnet material, is of a size of Φ 14.7mm * 1mm.
5. the embedded high intermodulation circulator that is used for the TD-SCDMA system according to claim 1 is characterized in that: described center conductor (4), shield blade (11), even magnetic sheet (12) electroplate.
6. the embedded high intermodulation circulator that is used for the TD-SCDMA system according to claim 1 is characterized in that: described permanent magnet (8) is the samarium cobalt permanent magnet body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201603701U CN201266663Y (en) | 2008-09-28 | 2008-09-28 | Embedded high intermodulation circulator for TD-SCDMA system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201603701U CN201266663Y (en) | 2008-09-28 | 2008-09-28 | Embedded high intermodulation circulator for TD-SCDMA system |
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| Publication Number | Publication Date |
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| CN201266663Y true CN201266663Y (en) | 2009-07-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201603701U Expired - Fee Related CN201266663Y (en) | 2008-09-28 | 2008-09-28 | Embedded high intermodulation circulator for TD-SCDMA system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103367849A (en) * | 2013-07-17 | 2013-10-23 | 天通控股股份有限公司 | Pin structure of surface-mounted microwave ferrite circulator |
| CN108054481A (en) * | 2017-11-27 | 2018-05-18 | 中电科技德清华莹电子有限公司 | A kind of strip line circulator |
| CN109473758A (en) * | 2019-01-17 | 2019-03-15 | 西南应用磁学研究所 | A kind of microwave ferrite circulator isolator bias magnetic field debugging structure and adjustment method |
-
2008
- 2008-09-28 CN CNU2008201603701U patent/CN201266663Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103367849A (en) * | 2013-07-17 | 2013-10-23 | 天通控股股份有限公司 | Pin structure of surface-mounted microwave ferrite circulator |
| CN103367849B (en) * | 2013-07-17 | 2015-05-27 | 天通控股股份有限公司 | Pin structure of surface-mounted microwave ferrite circulator |
| CN108054481A (en) * | 2017-11-27 | 2018-05-18 | 中电科技德清华莹电子有限公司 | A kind of strip line circulator |
| CN109473758A (en) * | 2019-01-17 | 2019-03-15 | 西南应用磁学研究所 | A kind of microwave ferrite circulator isolator bias magnetic field debugging structure and adjustment method |
| CN109473758B (en) * | 2019-01-17 | 2023-09-12 | 西南应用磁学研究所 | Microwave ferrite circulator isolator bias magnetic field debugging structure and debugging method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090701 Termination date: 20150928 |
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| EXPY | Termination of patent right or utility model |