A Novel Bandpass Filter Made of the Microstrip with Cantor Substrates

作者：Xiao Zhong Yin^*; Wang Zi Hua

来源：Journal of Infrared Millimeter and Terahertz Waves, 2009, 30(10): 1038-1043.

DOI：10.1007/s10762-009-9535-1

• Microstrip line
• Passband filter
• Fractal Cantor structure
• Transmission matrix
• Transmittance and reflectance

In this paper, the microstrip line with fractal Cantor distributing substrates is investigated. Transmission matrix method is used to calculate the transmittance and reflectance. Comparing with periodic distributing substrates, the microstrip line with fractal Cantor distribution shows sharp resonances inside band gap. The resonances in somewhere split and form more peaks with increase of the number of generation. Based on the microstrip line with Cantor substrates, a novel bandpass filter is proposed. The filter has 8.8 % 3dB bandwidth and two transmission zeros, 0.27dB insertion loss. The effect of width of microstrip line and thickness of substrate on the filter properties are discussed too.

• 出版日期2009-10
• 单位上海大学