Strap-shaped linetype ferrite phase shifter
A ferrite and phase shifter technology, applied to waveguide devices, electrical components, circuits, etc., can solve the problem of large volume and weight of phase shifters, difficulty in compression, large volume of microstrip ferrite phase shifters, etc. problem, to achieve the effect of low loss, volume and quality reduction
Inactive Publication Date: 2009-11-11
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology
In the former structure, since the size parameter of the waveguide is determined by the wavelength of the transmitted electromagnetic wave, it is difficult to compress, resulting in a large volume and weight of the phase shifter
In the latter structural form, although the volume and weight of the ferrite substrate and the microstrip part are not large, additional magnetization circuits and magnetic circuits are required to magnetize the ferrite substrate, which also causes the entire microstrip ferrite to shift. The volume of the phaser is too large
In addition, the microstrip ferrite phase shifter has poor performance in terms of phase shift and insertion loss
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[0020] The present invention will be described in further detail below with reference to a specific implementation and the accompanying drawings, but the embodiments of the present invention are not limited thereto.
[0021] The specifically implemented stripline ferrite phase shifter embedded with a dielectric layer has a center frequency of about 9.2GHz, a bandwidth greater than 300MHz, an insertion loss within the bandwidth of <2dB, a VSWR≤1.5, and a phase shift of more than 270 degrees. The length, width and height of the ferrite phase shifter are only about 24 mm, 15 mm and 5.5 mm, which are obviously smaller than conventional waveguide type and microstrip type ferrite phase shifters.
[0022] Figure 1 ~ Figure 3 It is a structural schematic diagram of the components and the whole of the stripline ferrite phase shifter with an embedded dielectric layer. The main structures include:
[0023] The gyromagnetic lithium ferrite material 1 has an outer body with a length of ...
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A strap-shaped linetype ferrite phase shifter belongs to the technical field of micro-wave communication apparatuses and comprises: a rectangular cubic gyromagnetic ferrite material (1) which is internally cut with a cavity with communicated front and rear parts so as to form a closed magnetic loop, wherein the outer surface of the gyromagnetic ferrite material is printed with a silver electrode; and a rectangular medium substrate (2) the surface of which has two mutually parallel magnetizing current leads (3) and one bend type microstrip line used for shifting phase. The rectangular medium substrate is embedded in the cavity of the gyromagnetic ferrite material and insulating glue is filled between the periphery of the rectangular medium substrate and the gyromagnetic ferrite material. When the apparatus works, magnetizing current is exerted through the magnetizing current leads to magnetize the gyromagnetic ferrite, and the gyromagnetic ferrite works at remnant magnetism state after the magnetizing current is withdrawn; and microwave signals are connected between two terminal electrodes of the bend type microstrip line used for shifting phase to consequently generate nonreciprocal differential phase shift. The invention can strikingly reduce volume and mass of the ferrite phase shifter, thus being conducive to the realization for the integration of the phase shifter with other active / passive devices or components.
Description
technical field [0001] The invention belongs to the technical field of microwave communication devices, and relates to a miniaturized stripline ferrite phase shifter. Background technique [0002] Compared with phase shifters in the form of PIN diodes and MMICs, ferrite phase shifters have great advantages in terms of insertion loss and average power. At present, there are two main types of common ferrite phase shifters in terms of structure: one is the form of ferrite hollow rectangular rod loaded in the waveguide; the other is the use of microstrip lines printed on the ferrite substrate structural form. In the former structure, since the size parameter of the waveguide is determined by the wavelength of the transmitted electromagnetic wave, it is difficult to compress, resulting in a large volume and weight of the phase shifter. In the latter structural form, although the volume and weight of the ferrite substrate and the microstrip part are not large, additional magneti...
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IPC IPC(8): H01P1/19
Inventor 苏桦张怀武杨许文唐晓莉薛钢贾利军荆玉兰钟智勇
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA