Design a small ultra-wideband bandpass filter on Al2O3 ceramic

Author

Yang, Cheng-Fu ; Wu, Sung-Mao ; Fu, Ming-Yue ; Tsai, Jen-Hwan ; Huang, Chien-Jung ; Huang, Chih-Yu

Author_Institution

Dept. of Chem. & Mater. Eng., Nat. Univ. of Kaohsiung, Kaohsiung, Taiwan

fYear

2010

fDate

7-10 Dec. 2010

Firstpage

1070

Lastpage

1073

Abstract

In this paper, an ultra-wideband (UWB) bandpass filter (BPF) using a modified multiple-mode resonator (MMR) is proposed, designed and fabricated on Al₂O₃ ceramic substrate. The length of MMR is 2mm and the width of MMR is changed from 1.35mm to 2.66mm to find the optimal value. Interdigital structure coupling lines are used to couple the input/output microstrip lines. Measured results achieve the insertion loss 0.35dB and the ripple variation 1.17dB in the realized 3.10 to 11.50 GHz ultra-wide passband. We will show that the UWB BPF has a very small size of 10.2mm by 2mm on a rectangle ground size smaller than 14mm by 4mm.

Keywords

aluminium compounds; band-pass filters; ceramics; design; microstrip lines; resonator filters; ultra wideband technology; Al₂O₃; ceramic substrate; design; frequency 3.10 GHz to 11.50 GHz; input/output microstrip lines; loss 0.35 dB; modified multiple-mode resonator; size 1.35 mm to 2.66 mm; ultra-wideband bandpass filter; Band pass filters; Bandwidth; Couplings; Filtering theory; Microstrip filters; Resonator filters; Ultra wideband technology; Ceramics; bandpass filter; interdigital; ultra-wideband;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference Proceedings (APMC), 2010 Asia-Pacific

Conference_Location

Yokohama

Print_ISBN

978-1-4244-7590-2

Electronic_ISBN

978-1-902339-22-2

Type

conf

Filename

5728389