X-waveband filled band substrate integrated waveguide circulator
An integrated waveguide and circulator technology, applied in the field of microwave technology, can solve the problems of difficult matching circuit impedance matching, insufficient performance indicators, and insufficient working bandwidth, etc., to achieve large commercial application value, ensure reliability, and improve power capacity Effect
Inactive Publication Date: 2014-09-24
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology
The working bandwidth of the existing X-band circulator is not full enough, and the performance index is not good enough
The main reason is the defect of the waveguide structure itself, as well as the difficulty of impedance matching between the design of the circulator and the matching circuit.
Method used
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Embodiment 1
[0041] A more specific example is as follows:
[0042] In this embodiment, a T-shaped SIW circulator with a size of 12×12 square millimeters adopts a triangular ferrite central junction.
[0043] step one:
[0044] a. Substrate integrated waveguide
[0045] Using schema TE in SIW 10 For transmission, the initial value of the SIW structure parameter is:
[0046] a=7.8mm, d=0.4mm, p=0.7mm, h=1mm
[0047] b. Ferrite center junction
[0048] According to the modified SIW circulator radius calculation formula, determine the circumscribed circle radius of the center junction triangle ferrite:
[0049] R f =3.5mm
[0050] Saturation magnetization: 4πM s =2500gauss, the ferromagnetic resonance line width is 60Oe.
[0051] The ferrite height is equal to the height of the dielectric substrate, h=0.635mm;
[0052] The obtained Y-type circulator structure is as follows figure 2 As shown, three substrate-integrated waveguides are connected at 120 degrees to each other around th...
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Abstract
The invention discloses an X-waveband filled band substrate integrated waveguide circulator, and relates to the microwave technology. The X-waveband filled band substrate integrated waveguide circulator comprises a micro-strip adaptor, a substrate integrated waveguide and ferrite, and is characterized in that the ferrite is triangular, the circumradius R of the ferrite meets the formula (please see the formula in the specification), c represents light velocity, f0 represents central frequency, epsilon rf represents ferrite dielectric constant, and mu e represents ferrite equivalent magnetic permittivity. By means of the X-waveband filled band substrate integrated waveguide circulator, stability of device circumnavigation performance is improved, reliability of the device is ensured, and great commercial application value is obtained.
Description
technical field [0001] The present invention relates to microwave technology. Background technique [0002] High-performance X-band circulators play an important role in isolation, protection circuits, and one-way transmission of energy in military active phased array radars and microwave circuit systems, and have a very wide range of applications. However, the transmission methods such as rectangular waveguide and coaxial waveguide used in traditional circulators have defects such as large volume, high quality, high cost, difficulty in integrating with planar circuits, and complicated debugging. Microstrip, stripline and other transmission methods have low quality factors, Disadvantages such as large electromagnetic radiation and large high-frequency insertion loss. Therefore, traditional circulators can no longer meet the development requirements of modern electronic technology: miniaturization, broadband, small insertion loss, and high isolation. Substrate integrated wa...
Claims
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Patent Timeline
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Inventor 罗力兢陈良汪晓光邓龙江朱帅黄成陈帅
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA