CN110783667B - Remanence ferrite phase shifter with flat plate structure - Google Patents
Remanence ferrite phase shifter with flat plate structure Download PDFInfo
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- CN110783667B CN110783667B CN201911049693.2A CN201911049693A CN110783667B CN 110783667 B CN110783667 B CN 110783667B CN 201911049693 A CN201911049693 A CN 201911049693A CN 110783667 B CN110783667 B CN 110783667B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/18—Phase-shifters
- H01P1/19—Phase-shifters using a ferromagnetic device
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
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Abstract
The application discloses dull and stereotyped structure remanence ferrite phase shifter, its major technical features is: the slab structure remanence ferrite phase shifter is composed of two oppositely magnetized ferrite slabs symmetrically arranged in parallel with the narrow side of the waveguide in the waveguide cavity, a loading medium in the center of the waveguide and magnetic yokes metalized on the inner surfaces of the upper side and the lower side of the waveguide cavity and parallel with the wide side of the waveguide. The method and the device can effectively improve the maximum phase shift amount of the remanence ferrite phase shifter, reduce the insertion loss, reduce the longitudinal length of the phase shifter, solve the problem that a loading medium of a single-ring ferrite phase shifter is difficult to process and assemble, and effectively reduce the cost and the complexity compared with a double-ring ferrite phase shifter.
Description
Technical Field
The application belongs to the field of phase shifters and relates to a residual magnetism ferrite phase shifter.
Background
The phase shifter is a key device in the phased array antenna, and the phase shifter is classified on materials and comprises a ferrite phase shifter, a ferroelectric medium phase shifter, a semiconductor phase shifter, an MEMS phase shifter and the like. For high power application, ferrite phase shifters are often used, which has the advantages of high reliability, low insertion loss and high power capacity.
In the existing residual magnetism ferrite phase shifter, a ferrite magnetic ring is added into a waveguide, and an excitation line is penetrated in the middle of the magnetic ring. An external driving circuit inputs current through an excitation line to provide a bias magnetic field, and the magnitude of the excitation current is controlled to enable the ferrite to work in different remanence states, so that the propagation constant in the waveguide is changed, and the phase shifting function is realized. According to the difference of the number of ferrite magnetic rings, the phase shifter is divided into a single-ring ferrite phase shifter and a double-ring ferrite phase shifter, and the internal cross-sectional views thereof are shown in fig. 1 and fig. 2.
Fig. 1 shows a single-ring ferrite phase shifter, in which a ferrite ring is located at the center of a waveguide, and a loading medium is inserted into the ferrite ring to improve the maximum phase shift of the phase shifter. However, for this structure, the process and assembly are difficult, the sintered ferrite ring is difficult to be completely attached to the loading medium, and the gap between the ferrite ring and the loading medium will affect the performance of the phase shifter and limit the power capacity of the phase shifter. Fig. 2 shows a dual-ring ferrite phase shifter, which uses two ferrite rings to place a loading medium in the center of a waveguide, thereby solving the problem of processing and assembling a single-ring phase shifter. However, due to the adoption of two ferrite rings, the number of corresponding driving circuits is multiplied, and the cost and the complexity of the system are increased.
In summary, in order to reduce the cost and complexity of the system, a single-ring ferrite phase shifter is preferably adopted, but the single-ring phase shifter has the difficulty in processing and assembling, and the loading medium is often removed in practical application, which causes the problems of reduction of the maximum phase shift amount of the phase shifter, increase of loss and lengthening of the longitudinal length.
Disclosure of Invention
In order to solve the problems in the background art, the application provides a slab-structured residual magnetism ferrite phase shifter, which can effectively improve the maximum phase shift amount of the residual magnetism ferrite phase shifter, reduce the insertion loss, reduce the longitudinal length of the phase shifter, solve the problem that a loading medium of a single-ring ferrite phase shifter is difficult to process and assemble, and effectively reduce the cost and the complexity compared with a double-ring ferrite phase shifter.
To achieve the above purpose, the present application proposes the following solutions:
the plate structure remanence ferrite phase shifter is characterized by comprising:
a waveguide cavity;
the two ferrite plates are opposite in magnetization direction, integrally positioned in the phase-shifting section part of the waveguide cavity, parallel to the height direction of the waveguide and symmetrically arranged about the axis of the waveguide cavity;
the loading medium is positioned in the center of the phase shift section of the waveguide cavity and is parallel to the height direction of the waveguide, and the left side and the right side of the loading medium are respectively clung to the two ferrite flat plates;
and the two magnetic yokes are positioned on the upper side and the lower side of the phase-shifting section of the waveguide cavity, are parallel to the width direction of the waveguide, form a closed magnetic ring with the two ferrite flat plates, and are tightly attached to the upper end and the lower end of the loading medium.
Based on the above scheme, the invention further optimizes as follows:
optionally, the phase shifter further includes two matching ceramics, which are respectively located in the centers of the front and rear sections of the waveguide cavity, and connected to the two ferrite slabs and two ends of the loading medium in the length direction (i.e., the waveguide transmission direction) for implementing impedance matching.
Optionally, the length of the phase shift section of the waveguide cavity in the middle in the transmission direction is the same as that of the ferrite slab, a rectangular waveguide with a width compressed compared with the standard waveguide size is adopted to avoid exciting a high-order mode, and the standard waveguide is adopted in the front and rear sections in the transmission direction to facilitate the integration test.
Optionally, the waveguide cavity entirely adopts a cover plate packaging structure.
Optionally, the yoke inner surface is metallized.
Optionally, the waveguide cavity is made of a metal material, the loading medium is made of a medium material with a high dielectric constant and low dielectric loss, and the matching ceramic is made of a medium material with low dielectric loss. Further optionally, the loading medium is made of zirconium tin titanium ceramic with a relative dielectric constant of 35, and the matching ceramic is made of microcrystalline glass material with a relative dielectric constant of 10.2.
Alternatively, the ferrite slab may be made of a lithium-based ferrite material, and the yoke may be made of the same lithium-based ferrite material as the ferrite slab (or another material may be used).
Optionally, the loading medium is as high as two ferrite slabs, and the two magnetic yokes are respectively embedded in the upper side and the lower side of the waveguide cavity.
The width of the yoke and the matching ceramic is determined by the width of the ferrite slab and the loading medium, for example, preferably, the width of each ferrite slab is 1mm, the width of the loading medium is 1.1mm, the width of the yoke is 3.1mm, and the width of the matching ceramic is 2 mm.
The application has the following beneficial effects:
the plate-structured residual magnetic ferrite phase shifter can effectively improve the maximum phase shift amount of the residual magnetic ferrite phase shifter, reduce the insertion loss, reduce the longitudinal length of the phase shifter, solve the problem that a loading medium of a single-ring ferrite phase shifter is difficult to process and assemble, and effectively reduce the cost and complexity compared with a double-ring ferrite phase shifter.
Drawings
FIG. 1 is a simplified internal cross-sectional view of a conventional single ring remanent ferrite phase shifter; in the figure, 1-waveguide cavity (waveguide wall), 2-loading medium, 3-ferrite ring.
FIG. 2 is a simplified internal cross-sectional view of a conventional dual ring remanent ferrite phase shifter; in the figure, 1-waveguide cavity (waveguide wall), 2-loading medium, 3-ferrite ring.
FIG. 3 is a simplified internal cross-sectional view of a slab-structured remanent ferrite phase shifter of the present application.
FIG. 4 is a top view of the inner part of a slab structure remanence ferrite phase shifter of the present application.
Fig. 5 is a schematic view of the inner surface of the cover plate after being attached with the magnetic yoke in the application.
Fig. 6 is a graph showing simulation results of phase shifter port reflection coefficients according to the present application.
Fig. 7 is a graph showing simulation results of insertion loss of the phase shifter according to the present application.
Fig. 8 is a graph comparing simulation results of maximum phase shift amount of the phase shifter of the present application with that of the conventional single-loop phase shifter.
The reference numerals in fig. 3-5 are explained as follows:
1-ferrite slab, 2-loading medium, 3-yoke (inner surface metallization), 4-waveguide cavity (waveguide wall), 5-matching ceramic, 6-waveguide cavity cover plate.
Detailed Description
The following detailed description of embodiments of the present application will be made with reference to the accompanying drawings.
The slab-structured residual magnetic ferrite phase shifter mainly comprises two oppositely magnetized ferrite slabs which are symmetrically arranged in a waveguide cavity in parallel with a narrow side of a waveguide, a loading medium positioned in the center of the waveguide and magnetic yokes which are positioned in parallel with a wide side of the waveguide and are metalized on the inner surfaces of the upper side and the lower side of the waveguide cavity.
Referring to fig. 3, 4 and 5, the ferrite phase shifter structure provided in this embodiment mainly includes: ferrite flat plate 1, loading medium 2, yoke 3, waveguide cavity 4 and matching ceramic 5.
The ferrite slab is made of lithium ferrite material, and has a relative dielectric constant of 16 and a saturation magnetization of 148 kA/m. The number of the ferrite flat plates is two, the magnetization directions of the ferrite flat plates are opposite, the ferrite flat plates are positioned on a phase-shifting section part of the waveguide cavity, the length of the ferrite flat plates is 40mm, the width of the ferrite flat plates is 1mm, the ferrite flat plates are parallel to the height direction of the waveguide and are 10.16mm in height, the ferrite flat plates are symmetrically arranged around the axis of the waveguide cavity, and the distance between the two ferrite flat plates is 1.1.
The loading medium is made of zirconium tin titanium ceramic with a relative dielectric constant of 35, is positioned in the center of the phase-shifting section of the waveguide cavity, has a length of 40mm, is arranged in parallel to the height direction of the waveguide, has a width of 1.1mm and a height of 10.16mm, and is tightly attached to the ferrite flat plates on the left side and the right side.
The magnetic yoke is made of lithium ferrite materials the same as the ferrite slab, the number of the magnetic yoke is two, the magnetic yoke is parallel to the width direction of the waveguide, the width is 3.1mm, the height is 1mm, the magnetic yoke is positioned on the upper side and the lower side of the phase-shifting section of the waveguide cavity, the inner surface of the magnetic yoke is metalized, and the magnetic yoke and the ferrite slab form a closed magnetic ring.
The waveguide cavity is of a metal structure, the phase-shifting section part in the middle in the transmission direction is 40mm long, as shown in fig. 4, a rectangular waveguide with the size of 8mm multiplied by 10.16mm and the width compressed is adopted to avoid exciting a high-order mode, and a standard waveguide with the size of 22.86mm multiplied by 10.16mm is adopted in the front section part and the rear section part in the transmission direction, so that the integrated test is facilitated.
The matching ceramic is made of microcrystalline glass materials with the relative dielectric constant of 10.2, the number of the two microcrystalline glass materials is two, the two microcrystalline glass materials are respectively positioned in the centers of the front section and the rear section of the waveguide cavity, the length of the two microcrystalline glass materials is 4.4mm, the width of the two microcrystalline glass materials is 2mm, and the height of the two microcrystalline glass materials is 10.16mm, so that impedance matching is realized.
As shown in fig. 5, the waveguide cavity has a cover plate structure, which facilitates assembly of the ferrite slab, the loading medium, the magnetic yoke and the matching ceramic.
The slab-structured residual magnetic ferrite phase shifter provided by the embodiment can effectively improve the maximum phase shift amount of the residual magnetic ferrite phase shifter, reduce the insertion loss, reduce the longitudinal length of the phase shifter, solve the problem that a loading medium of a single-ring ferrite phase shifter is difficult to process and assemble, and effectively reduce the cost and complexity compared with a double-ring ferrite phase shifter.
Referring to FIGS. 6, 7 and 8, S can be seen from the three figures11，S21Simulation results of the maximum phase shift indicate that in the frequency range of 9.04GHz to 9.654GHz, the reflection coefficient of port 1 is less than-20 dB (see fig. 6), the insertion loss of port 1 to port 2 is less than 0.4dB (see fig. 7), (i.e., port 1 to port 2 is transmitting forward without port reflection) and thus the phase shifter can operate over a wide frequency range. The maximum phase shift amount result of the novel flat plate structure phase shifter and the existing single-ring structure phase shifter adopting the same size and material parameters is shown in fig. 8, the maximum phase shift amount of the single-ring structure phase shifter is larger than 360 degrees within the frequency range of 9GHz to 9.6GHz, and the maximum phase shift amount of the flat plate structure phase shifter is close to 390 degrees. Therefore, compared with the existing single-ring phase shifter, the maximum phase shift amount of the phase shifter with the flat plate structure is improved by 6.6%. Simulation results verify the phase shifting performance of the novel flat plate phase shifter, and prove that the phase shifter structure can effectively improve the maximum phase shifting quantity of the ferrite phase shifter, thereby reducing the insertion loss and the longitudinal length of the phase shifter.
The above description is only a preferred example of the present application and is not intended to limit the present application, and various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A slab structure remanence ferrite phase shifter is characterized by comprising:
a waveguide cavity (4);
the two ferrite flat plates (1) are opposite in magnetization direction, integrally positioned at the phase-shifting section part of the waveguide cavity (4), parallel to the height direction of the waveguide and symmetrically arranged about the axis of the waveguide cavity (4);
the loading medium (2) is positioned in the center of the phase-shifting section of the waveguide cavity (4) and is parallel to the height direction of the waveguide, and the left side and the right side of the loading medium (2) are respectively clung to the two ferrite flat plates (1);
and the two magnet yokes (3) are positioned on the upper side and the lower side of the phase-shifting section of the waveguide cavity (4), are parallel to the width direction of the waveguide, form a closed magnetic ring with the two ferrite flat plates (1), and are tightly attached to the upper end and the lower end of the loading medium (2).
2. The slab structure residual magnetic ferrite phase shifter according to claim 1, further comprising two matching ceramics (5) respectively located at the center of the front and rear sections of the waveguide cavity (4), connected to the two ferrite slabs (1) and the two ends of the loading medium (2) in the length direction, for realizing impedance matching.
3. The slab structure residual magnetic ferrite phase shifter according to claim 1, wherein the length of the phase shift section of the waveguide cavity (4) in the middle in the transmission direction is the same as that of the ferrite slab (1), a rectangular waveguide with a width compressed compared with the standard waveguide size is used to avoid exciting high-order modes, and the standard waveguide is used in the front and rear section parts in the transmission direction to facilitate the integration test.
4. The slab structure residual magnetic ferrite phase shifter according to claim 1, characterized in that the waveguide cavity (4) is entirely in a cover plate package structure.
5. The plate structure residual magnetic ferrite phase shifter according to claim 1, characterized in that the inner surface of the yoke (3) is metallized.
6. The slab structure residual magnetic ferrite phase shifter according to claim 2, wherein the waveguide cavity (4) is made of metal, the loading medium (2) is made of a high dielectric constant and low dielectric loss medium material, and the matching ceramic (5) is made of a low dielectric loss medium material.
7. The plate-structured residual magnetic ferrite phase shifter according to claim 6, wherein the loading medium (2) is a zirconium tin titanium ceramic having a relative dielectric constant of 35, and the matching ceramic (5) is a glass-ceramic material having a relative dielectric constant of 10.2.
8. The plate-structured residual magnetism ferrite phase shifter according to claim 1, wherein the ferrite plate is made of a lithium-based ferrite material, and the yoke is made of the same lithium-based ferrite material as the ferrite plate.
9. The slab structure residual magnetic ferrite phase shifter according to claim 1, wherein the loading medium is at the same height as two ferrite slabs (1), and the two yokes (3) are respectively embedded into the waveguide cavity (4) at the upper and lower sides.
10. The slab structure residual magnetic ferrite phase shifter according to claim 2, wherein each ferrite slab (1) has a width of 1mm, the loading medium (2) has a width of 1.1mm, the yoke (3) has a width of 3.1mm, and the matching ceramic has a width of 2 mm.
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| CN201911049693.2A CN110783667B (en) | 2019-10-31 | 2019-10-31 | Remanence ferrite phase shifter with flat plate structure |
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| CN112448107B (en) * | 2020-12-02 | 2024-08-20 | 西安电子工程研究所 | 90-Degree electric control ferrite phase shifter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN204271221U (en) * | 2014-11-14 | 2015-04-15 | 南京国睿微波器件有限公司 | A kind of ultra broadband dicyclo high power ferrite phase shifter |
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| US7528688B2 (en) * | 2005-07-29 | 2009-05-05 | Oakland University | Ferrite-piezoelectric microwave devices |
| CN101557024B (en) * | 2009-05-20 | 2012-05-30 | 电子科技大学 | Stripline type ferrite phase shifter based on LTCC technology |
| US9112250B1 (en) * | 2013-07-19 | 2015-08-18 | Christos Tsironis | Wideband attenuation and phase controller |
| CN205723882U (en) * | 2016-06-22 | 2016-11-23 | 南京国睿微波器件有限公司 | A kind of microwave ferrite bimodulus circular polarisation Reciprocal phase shifter |
| CN205723883U (en) * | 2016-06-22 | 2016-11-23 | 南京国睿微波器件有限公司 | A kind of microwave ferrite linear polarization nonreciprocal phase shifter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN204271221U (en) * | 2014-11-14 | 2015-04-15 | 南京国睿微波器件有限公司 | A kind of ultra broadband dicyclo high power ferrite phase shifter |
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