CN101958448A - Microwave strip transmission line circulator with harmonic suppression function - Google Patents
Microwave strip transmission line circulator with harmonic suppression function Download PDFInfo
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- CN101958448A CN101958448A CN2010101842314A CN201010184231A CN101958448A CN 101958448 A CN101958448 A CN 101958448A CN 2010101842314 A CN2010101842314 A CN 2010101842314A CN 201010184231 A CN201010184231 A CN 201010184231A CN 101958448 A CN101958448 A CN 101958448A
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- transmission line
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Abstract
The invention provides a microwave strip transmission line circulator with a harmonic suppression function, which comprises a permanent magnet, a metal pole piece, microwave ferrites and an outer case. One strip line central conductor is installed among the microwave ferrites and comprises three 120 DEG Y-junction resonators and three matching circuits, and each matching circuit comprises an open parallel circuit and an inductance type transmission line. The three inductance type transmission lines of the strip line central conductor are respectively connected with an electrical conductor at a port of the circulator radially at the equal intervals of 120 degrees. The microwave strip transmission line circulator is provided with a built-in open parallel circuit with one quarter wavelength and provides the functions of a trap filter to suppress harmonic waves.
Description
Technical field
The present invention relates to the Microwave Iron Oxide Elements of wireless communications application, relate in particular to a kind of strip transmission line circulator/isolator that is used for the built-in open circuit notch filter in parallel of harmonic wave inhibition.
Background technology
Microwave ferrite circulator is a kind of unidirectional device with three or more port, and it comprises microwave ferrite, strip line center conductor circuit, ground connection pole piece and permanent magnet.Owing to be subjected to the effect of the gyromagnetic effect of the magnetized microwave ferrite of bias field, the electromagnetic wave energy of entry port 1 goes in ring and arrives port 2 outputs, and isolates with port 3.
Usually people can expect the reverse signal energy in the microwave circulator, insert loss and minimized in size, the rapid raising that high Capacity Communication System is required along with wireless communications market simultaneously, require microwave circulator can handle the interior high-power signal of broad frequency range, and make the wave absorption at microwave ferrite interface and the distortion minimization that intermodulation is produced.But because the limitation of circuit design, this effect is difficult to eliminate fully.
Improve circulator before and mainly comprise following two kinds of approach in the technology of the performance of harmonic wave frequency range: first method is that the harmonic component that ferrite is produced at the interface minimizes; Second method is the harmonic component that suppresses by ferrite generation and other outside nonlinear device.
First method relates to low resonant circuit of design on the center conductor circuit, and its frequency is far below the ferro resonance frequency of ferrite component, and therefore, this resonant circuit is big more a lot of than stock size, and the spatial limitation of acceptor center conductor circuit.Second method relates in the output loop of circulator inserts the decay that an inside or outside low pass filter (LPF) increase harmonic component.This LPF can form extra insertion loss, is subjected to the device size restrictions too.
Summary of the invention
The objective of the invention is to overcome the deficiency that prior art exists, the circulator/isolator that provides a kind of built-in quarter-wave to open a way notch filter in parallel with harmonic wave suppression characteristic.
Purpose of the present invention is achieved through the following technical solutions:
Microstrip transmission line circulator with harmonic restraining function, comprise permanent magnet, metal pole piece, microwave ferrite and shell, characteristics are: the strip line center conductor of packing between the described microwave ferrite, described strip line center conductor comprises three 120 degree Y knot resonators and three match circuits, described each match circuit comprises at least one open circuit parallel circuits and an inductive type transmission line, and three inductive type transmission lines of described strip line center conductor are the radial electric conductor that is connected to circulator port respectively with impartial 120 degree angles.
Further, above-mentioned microstrip transmission line circulator with harmonic restraining function, wherein, the open circuit parallel circuits in described each match circuit extends from the proximal port end of inductive type transmission line, and perhaps two open circuit parallel circuitss extend with opposite side.Described open circuit parallel circuits is I shape or L shaped shape, and the electrical length of open circuit parallel circuits equals the quarter-wave of the second harmonic frequency of circulator operating frequency.
Further, above-mentioned microstrip transmission line circulator with harmonic restraining function, wherein, described strip line center conductor is close to the surface of microwave ferrite in a coaxial fashion.
Again further, above-mentioned microstrip transmission line circulator with harmonic restraining function, wherein, described microwave ferrite is cylindrical, and to extend to the radius that central point defined of strip line center conductor the same big with the open circuit parallel circuits at least for the radius of microwave ferrite.
Substantive distinguishing features and obvious improvement that technical solution of the present invention is outstanding are mainly reflected in:
Microstrip transmission line circulator of the present invention, it has built-in quarter-wave open circuit parallel circuits, notch filter as the harmonic wave inhibition, to harmonic suppression effect highly significant, solved other little band harmonic wave and suppressed the problem that circuit is subjected to the device size restrictions because of ferrite interface and the generation of other nonlinear device; Its low cost of manufacture, the function brilliance, ease in use.
Description of drawings
Below in conjunction with accompanying drawing technical solution of the present invention is described further:
Fig. 1: the perspective view of circulator;
Fig. 2: the floor map of strip line center conductor.
The implication of each Reference numeral sees the following form among the figure:
| Reference numeral | Implication | Reference numeral | Implication | Reference | Implication | |
| 1 | |
2 | |
3 | The |
|
| 4 | |
5 | The strip |
6 | Lid | |
| 7 | The strip |
8 | The open circuit parallel circuits | 9 | The inductive |
|
| 10 | Resonator |
Embodiment
As shown in Figure 1, microstrip transmission line circulator with harmonic restraining function, the shell 1 that comprises the pair of permanent magnets 2, pair of metal pole piece 3, a pair of microwave ferrite 4 and the magnetic conduction that are used to provide magnetic biasing, the strip line center conductor 5 of packing between a pair of microwave ferrite 4, strip line center conductor 5 is close to the surface of microwave ferrite 4 in a coaxial fashion; As Fig. 2, strip line center conductor 5 comprises three 120 degree Y knot resonators 10 and three match circuits, each match circuit comprises at least one open circuit parallel circuits 8 and an inductive type transmission line 9, open circuit parallel circuits 8 extends from the proximal port end of inductive type transmission line, perhaps two open circuit parallel circuitss extend with opposite side, open circuit parallel circuits 8 is I shape or L shaped shape, and the electrical length of open circuit parallel circuits equals the quarter-wave of the second harmonic frequency of circulator operating frequency; Three inductive type transmission lines 9 of strip line center conductor are the radial electric conductor 7 that is connected to circulator port respectively with impartial 120 degree angles.Above-mentioned pair of permanent magnets 2, pair of metal pole piece 3, a pair of microwave ferrite 4 and strip line center conductor 5 all pack into magnetic conduction shell 1 in intracardiac, and be fixed by threaded lid 6.
Wherein, open circuit parallel circuits 8, it is the equivalent capacity of match circuit, be used to make resonator 10 and electric conductor 7 to realize impedance matching in working band, but it is exactly a notch filter for the inhibition of harmonic frequency.The electrical length of each open circuit parallel circuits 8 is designed to 1/4 wavelength of harmonic frequency respectively, is 1/8 wavelength of operating frequency.Two open circuits of the proximal port end of inductive type transmission line 9 are in parallel to be extended along opposite side, forms two parallel notch filters and the enhancing inhibition to harmonic wave.In addition, open circuit parallel circuits 8 can be embedded into and be used for input in the match circuit, output impedance is mated or both take into account.
Two metal pole pieces 3 cover the surface of microwave ferrite 4 simultaneously as the ground plane of strip transmission line and the top and bottom of conducting shell 1, make the microwave ferrite magnetization with permanent magnet 2.
In sum, microstrip transmission line circulator of the present invention, it has built-in quarter-wave open circuit parallel circuits, as the notch filter that harmonic wave suppresses, low cost of manufacture.
What need understand is: the above only is a preferred implementation of the present invention; for those skilled in the art; under the prerequisite that does not break away from the principle of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (5)
1. the microstrip transmission line circulator that has harmonic restraining function, comprise permanent magnet, metal pole piece, microwave ferrite and shell, it is characterized in that: the strip line center conductor of packing between the described microwave ferrite, described strip line center conductor comprises three 120 degree Y knot resonators and three match circuits, described each match circuit comprises at least one open circuit parallel circuits and an inductive type transmission line, and three inductive type transmission lines of described strip line center conductor are the radial electric conductor that is connected to circulator port respectively with impartial 120 degree angles.
2. the microstrip transmission line circulator with harmonic restraining function according to claim 1, it is characterized in that: the open circuit parallel circuits in described each match circuit extends from the proximal port end of inductive type transmission line, and perhaps two open circuit parallel circuitss extend with opposite side.
3. the microstrip transmission line circulator with harmonic restraining function according to claim 1 and 2, it is characterized in that: described open circuit parallel circuits is I shape or L shaped shape, and the electrical length of open circuit parallel circuits equals the quarter-wave of the second harmonic frequency of circulator operating frequency.
4. the microstrip transmission line circulator with harmonic restraining function according to claim 1, it is characterized in that: described strip line center conductor is close to the surface of microwave ferrite in a coaxial fashion.
5. the microstrip transmission line circulator with harmonic restraining function according to claim 1, it is characterized in that: described microwave ferrite is cylindrical, and to extend to the radius that central point defined of strip line center conductor the same big with the open circuit parallel circuits at least for the radius of microwave ferrite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101842314A CN101958448A (en) | 2010-05-27 | 2010-05-27 | Microwave strip transmission line circulator with harmonic suppression function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101842314A CN101958448A (en) | 2010-05-27 | 2010-05-27 | Microwave strip transmission line circulator with harmonic suppression function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101958448A true CN101958448A (en) | 2011-01-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101842314A Pending CN101958448A (en) | 2010-05-27 | 2010-05-27 | Microwave strip transmission line circulator with harmonic suppression function |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105226358A (en) * | 2015-10-30 | 2016-01-06 | 世达普(苏州)通信设备有限公司 | There is the microwave strip transmission line circulator of Broadband Matching |
| CN106654491A (en) * | 2015-10-28 | 2017-05-10 | 世达普(苏州)通信设备有限公司 | Communication device |
| CN114335949A (en) * | 2021-11-26 | 2022-04-12 | 北京无线电测量研究所 | Micro-strip circulator |
| CN114464974A (en) * | 2022-03-16 | 2022-05-10 | 电子科技大学 | Circulator with filtering characteristic |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201340899Y (en) * | 2008-12-31 | 2009-11-04 | 南京拓邦微电子有限公司 | 200MHz embedded type circulator |
| CN101621148A (en) * | 2009-05-27 | 2010-01-06 | 深圳市华扬通信技术有限公司 | Circulator |
| CN201490314U (en) * | 2009-08-19 | 2010-05-26 | 许江 | Microstrip circulator and microstrip isolator formed by microstrip circulator |
| CN201708237U (en) * | 2010-05-27 | 2011-01-12 | 世达普(苏州)通信设备有限公司 | Microwave strip transmission line circulator with harmonic suppression |
-
2010
- 2010-05-27 CN CN2010101842314A patent/CN101958448A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201340899Y (en) * | 2008-12-31 | 2009-11-04 | 南京拓邦微电子有限公司 | 200MHz embedded type circulator |
| CN101621148A (en) * | 2009-05-27 | 2010-01-06 | 深圳市华扬通信技术有限公司 | Circulator |
| CN201490314U (en) * | 2009-08-19 | 2010-05-26 | 许江 | Microstrip circulator and microstrip isolator formed by microstrip circulator |
| CN201708237U (en) * | 2010-05-27 | 2011-01-12 | 世达普(苏州)通信设备有限公司 | Microwave strip transmission line circulator with harmonic suppression |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106654491A (en) * | 2015-10-28 | 2017-05-10 | 世达普(苏州)通信设备有限公司 | Communication device |
| CN106654491B (en) * | 2015-10-28 | 2020-09-01 | 世达普(苏州)通信设备有限公司 | Communication device |
| CN105226358A (en) * | 2015-10-30 | 2016-01-06 | 世达普(苏州)通信设备有限公司 | There is the microwave strip transmission line circulator of Broadband Matching |
| CN114335949A (en) * | 2021-11-26 | 2022-04-12 | 北京无线电测量研究所 | Micro-strip circulator |
| CN114464974A (en) * | 2022-03-16 | 2022-05-10 | 电子科技大学 | Circulator with filtering characteristic |
| CN114464974B (en) * | 2022-03-16 | 2022-07-05 | 电子科技大学 | Circulator with filtering characteristic |
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Application publication date: 20110126 |