Double Y-junction is a traditional central conductor shape for microstrip circulator. In order to minimize the dimension, An improved double Y-junction microstrip circulator design in Ku band is described in this paper. In addition, a simple principle of how to select a proper kind of ferrite is introduced. The experimental model and test results are given proved the efficiency of the design.
This paper describes a simple measurement method for an electrical ultra-large circular polarization antenna, which is a W-band reflector antenna. The results are given in the end of this paper confirmed the effectiveness of the proposed method.
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