Microwave Fractal Bandpass Filters Based on Modified Hilbert Curves of the First and the Second Orders

作者：Parsamyan H^*; Babajanyan A; Lee K

来源：Journal of Contemporary Physics (Armenian Academy of Sciences), 2018, 53(2): 146-151.

DOI：10.3103/S1068337218020068

• bandpass filter
• fractal
• Hilbert curve

The microwave fractal bandpass filters based on modified Hilbert shaped curves of the first and second fractal orders are experimentally and numerically analyzed. As a substrate Al2O3 ceramic covered by the thin silver layer with thickness of 50 mu m was used. The laser patterning technique was used to design the structures of filters. The filter based on the Hilbert curve of the first order has resonance at similar to 4.01 GHz, while the filter based on the second order Hilbert curve has resonances at similar to 3.09 and similar to 6.34 GHz. The estimated loaded Q-factor of the filter based on the first order Hilbert curve was similar to 94. The electromagnetic field distribution of the filter was visualized by using the thermo-elastic optical indicator microscopy.

• 出版日期2018-4