CN204179190U - For the high-performance isolator of communication frequency band - Google Patents
For the high-performance isolator of communication frequency band Download PDFInfo
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- CN204179190U CN204179190U CN201420627984.1U CN201420627984U CN204179190U CN 204179190 U CN204179190 U CN 204179190U CN 201420627984 U CN201420627984 U CN 201420627984U CN 204179190 U CN204179190 U CN 204179190U
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- gyromagnetic ferrite
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Abstract
The utility model relates to a kind of high-performance isolator for communication frequency band, comprise cavity, radio-frequency resistance, cover plate, described radio-frequency resistance is located at outside cavity, described cover plate is located at cavity hatch place, is inwardly disposed with the first temperature-compensating sheet, the second temperature-compensating sheet, the 3rd temperature-compensating sheet, the first strontium calcium permanent magnet, the first even magnetic sheet, the first gyromagnetic ferrite, center conductor, the second gyromagnetic ferrite, the second even magnetic sheet, the second strontium calcium permanent magnet from cavity hatch; The radial edges of described first gyromagnetic ferrite, the second gyromagnetic ferrite is overlapped respectively first medium ring and second medium ring; Described center conductor is provided with three and draws end points, and one of them is drawn end points and is soldered on the pad of radio-frequency resistance, and two other is drawn end points and is introduced to outside cavity.The utility model tool has the following advantages: magnetic circuit closes, and leakage field is little, and without the need to adhesive and screw, be easy to miniaturized, reliability is high, and overall device performance is good.
Description
Technical field
The utility model relates to electronic devices and components field, be specifically related to a kind of high-performance isolator for 1800M communication frequency band, in the base station being widely used in 900M mobile communication and mobile station system, transmitting and receiving system rate of doing work amplifier, switching amplifier input, export isolation and in measuring system, play decoupling effect.
Background technology
The design concept of three desirable end junction circulators is based on scattering matrix theory, and collision matrix sets up the relation between incident wave and reflected wave of finishing.The central area that three end junction circulators are loaded by a ferrite and three transmission lines be coupled with it form, by changing ferritic size, saturation magnetic moment, dielectric constant, the geomery of additional Constant charge soil and center conductor, thus the eigenvalue changing collision matrix, form circulator.For desirable three end circulators see Fig. 2, the electromagnetic wave of 5 port inputs can only export from 4 ports, and the electromagnetic wave of 4 port inputs can only export from 3 ports, and the electromagnetic wave of 3 port inputs can only export from 5 ports.Be extend from three-port circulator see Fig. 1 isolator, just at one end add that matched load (load of little reflection termination) forms.Isolator is a two end device, and signal is from input 1 to output 2, and the energy attenuation of transmission is less, and signal is then high decay from output 2 to input 1, is absorbed by load.
Circulator and isolator can be made coaxially, micro-band, band line, the various ways such as waveguide, are used in various electromagnetic wave transmission system, and Fig. 3 is that circulator is for duplex system, 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, to be different from ATR same-frequency duplexing device in Radar Technology.
Fig. 4 is that two isolators and 900 electric bridges are combined into mixer, is two-in-one device.Also can make four-in-one mixer, it is made up of four isolators and three 900 electric bridges.Between this mixer end 6 and end 7, isolation must be greater than 50dB.
Fig. 5 is coupling and the decoupling 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. 6 eliminates the mutual interference 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. 7 is two-in-one antenna emission system.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.
As shown in Figure 8, in cavity 10, loading strontium calcium permanent magnet 11, iron plate 12, dielectric ring 13, ferrite 14, inner wire 15, dielectric ring 16, ferrite 17, clamp 18, strontium calcium permanent magnet 19, nickel sheet 20, cover plate 21 are separately fixed on cavity existing embedded isolator structure.Strontium calcium permanent magnet provides bias magnetic field for gyromagnetic ferrite, and center conductor has three to draw end points, and one of them port matching connection load, other two ports are respectively input and output.This structure processing consumptive material is large, and operating fields is low, and magnetic circuit is not exclusively closed, and leakage field is comparatively large, and magnetic circuit efficiency is low, is difficult to the miniaturization accomplishing high intermodulation and structure.
Utility model content
The utility model overcomes the deficiencies in the prior art, and being provides the high-performance isolator for communication frequency band that a kind of structure is simple, volume is little, magnetic circuit closes, leakage field is little.
Concrete technical scheme of the present utility model is as follows:
A kind of high-performance isolator for communication frequency band, comprise cavity, radio-frequency resistance, cover plate, described radio-frequency resistance is located at outside cavity, described cover plate is located at cavity hatch place, is inwardly disposed with the first temperature-compensating sheet, the second temperature-compensating sheet, the 3rd temperature-compensating sheet, the first strontium calcium permanent magnet, the first even magnetic sheet, the first gyromagnetic ferrite, center conductor, the second gyromagnetic ferrite, the second even magnetic sheet, the second strontium calcium permanent magnet from cavity hatch; The radial edges of described first gyromagnetic ferrite, the second gyromagnetic ferrite is overlapped respectively first medium ring and second medium ring; Described center conductor is provided with three and draws end points, and one of them is drawn end points and is soldered on the pad of radio-frequency resistance, and two other is drawn end points and is introduced to outside cavity.
Described center conductor, the first even magnetic sheet, the second even magnetic sheet electroplate; Be conducive to the insertion of device and the reduction of loss
Employing integral structure described in the utility model, be namely processed to shape of threads at the opening part of cavity and cover plate periphery, the screw thread of cover plate along cavity hatch place is spun on cavity; Have magnetic circuit to close, leakage field is little, is easy to miniaturized, the features such as reliability is high, and overall device performance is good.
The gyromagnetic ferrite that the utility model adopts is pure garnet 1800 material, and this kind of material Curie temperature is high, and density is high, easier temperature-compensating.
Compared with prior art, the high-performance isolator for communication frequency band that the utility model provides, has magnetic circuit after adopting three temperature-compensating sheets and closes, the feature that leakage field is little; And without the need to adhesive and screw, be easy to miniaturized, reliability is high, and overall device performance is good.
Accompanying drawing explanation
Fig. 1 is the structural representation of isolator;
Fig. 2 is the structural representation of circulator;
Fig. 3 is the structural representation of circulator for duplex system;
Fig. 4 is the structural representation that two isolators and 900 electric bridges are combined into mixer;
Fig. 5 is the coupling of power amplifier inter-stage and the structural representation of decoupling;
Fig. 6 is the structural representation of the mutual interference eliminated between emission source;
Fig. 7 is the structural representation of two-in-one antenna emission system;
Fig. 8 is existing embedded isolator structural representation;
Fig. 9 is the structural representation of the utility model high-performance isolator;
Figure 10 is the schematic diagram after the utility model assembling.
Embodiment
The utility model is further illustrated below in conjunction with accompanying drawing.
See Fig. 9 and Figure 10, a kind of high-performance isolator for communication frequency band, comprise cavity 10, radio-frequency resistance 22, cover plate 21, described radio-frequency resistance 22 is located at outside cavity 10, described cover plate 21 is located at cavity 10 opening part, is inwardly disposed with the first temperature-compensating sheet 33, second temperature-compensating sheet 32, the 3rd temperature-compensating sheet 32a, even magnetic sheet 30, first gyromagnetic ferrite 29 of the first strontium calcium permanent magnet 31, first, even magnetic sheet 24, the second strontium calcium permanent magnet 23 of center conductor 27, second gyromagnetic ferrite 26, second from cavity 10 opening part; The radial edges of described first gyromagnetic ferrite 29, second gyromagnetic ferrite 26 is overlapped respectively and is had first medium ring 28 and second medium ring 25; Center conductor 27 is provided with three and draws end points, and one of them is drawn end points and is soldered on the pad of radio-frequency resistance 22, and two other is drawn end points and is introduced to outside cavity 10.
Even magnetic sheet 24 electroplate of described center conductor the 27, first even magnetic sheet 30, second; Be conducive to the insertion of device and the reduction of loss.Employing integral structure described in the utility model, be namely processed to shape of threads at the opening part of cavity and cover plate periphery, the screw thread of cover plate along cavity hatch place is spun on cavity; Have magnetic circuit to close, leakage field is little, is easy to miniaturized, the features such as reliability is high, and overall device performance is good.
The key technical indexes of above-mentioned high-performance isolator is as following table:
| Frequency range | 1800MHz-1880MHz |
| Forward loss | ≤0.2dB |
| Reverse isolation | ≥25dB |
| Return loss | ≥25dB |
| Temperature range | -40℃～+90℃(0.2dB/23dB/23dB) |
| Joint form | W → W forward |
| Reflection power | 100W |
| Bearing power | 100W |
| Pass through power | 110W (on average) |
| Peak power | 430W (duty ratio 0.01%) |
| Intermodulation | Three rank :-80dBc (2*50dBm) |
| Second harmonic | -47dBc |
As mentioned above, although describe the utility model with reference to embodiment, it shall not be construed as the restriction to the utility model self, under the prerequisite not departing from spirit and scope of the present utility model, can make various change in the form and details to it.
Claims (3)
1. the high-performance isolator for communication frequency band, it is characterized in that comprising cavity, radio-frequency resistance, cover plate, described radio-frequency resistance is located at outside cavity, described cover plate is located at cavity hatch place, is inwardly disposed with the first temperature-compensating sheet, the second temperature-compensating sheet, the 3rd temperature-compensating sheet, the first strontium calcium permanent magnet, the first even magnetic sheet, the first gyromagnetic ferrite, center conductor, the second gyromagnetic ferrite, the second even magnetic sheet, the second strontium calcium permanent magnet from cavity hatch; The radial edges of described first gyromagnetic ferrite, the second gyromagnetic ferrite is overlapped respectively first medium ring and second medium ring; Described center conductor is provided with three and draws end points, and one of them is drawn end points and is soldered on the pad of radio-frequency resistance, and two other is drawn end points and is introduced to outside cavity.
2. high-performance isolator according to claim 1, is characterized in that described center conductor, the first even magnetic sheet, the second even magnetic sheet electroplate.
3. high-performance isolator according to claim 1 and 2, it is characterized in that the opening part of described cavity and cover plate periphery are processed to shape of threads, the screw thread of cover plate along cavity hatch place is spun on cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420627984.1U CN204179190U (en) | 2014-10-27 | 2014-10-27 | For the high-performance isolator of communication frequency band |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420627984.1U CN204179190U (en) | 2014-10-27 | 2014-10-27 | For the high-performance isolator of communication frequency band |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204179190U true CN204179190U (en) | 2015-02-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420627984.1U Expired - Fee Related CN204179190U (en) | 2014-10-27 | 2014-10-27 | For the high-performance isolator of communication frequency band |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204179190U (en) |
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2014
- 2014-10-27 CN CN201420627984.1U patent/CN204179190U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20150225 Termination date: 20201027 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |