BAND-PASS FILTERS USING HIGH-PERMITTIVITY CERAMICS SUBSTRATE

作者：Huang Cheng Liang^*; Tasi Shin Tung; Chen Yuan Bin

来源：Microwave and Optical Technology Letters, 2010, 52(10): 2344-2347.

DOI：10.1002/mop.25439

• high-permittivity
• band-pass filter
• ceramics substrate

The miniaturization of ring band-pass filters by employing high-permittivity ceramic substrates (with respective dielectric constants of 9.7 and 23.5) are investigated. Microwave dielectric ceramics with high-permittivity are commonly applied in several microwave communication components. With the advantages of compact size, high-permittivity ceramics can be used as the substrate for band-pass filters. Moreover, the fundamental characteristics of newly developed compact ring resonators have also been described and applied to the design of band-pass filters. In this article, the designed ring resonators structures are simulated using an HFSS simulator. The responses of the fabricated band-pass filters using Al(2)O(3) (epsilon(r) = 9.7, tan delta = 0.0001) and 0.875Mg(0.95)Zn(0.05)TiO(3)-0.125Ca(0.8)Sm(0.413)TiO(3) (epsilon(r) = 23.5. tan delta = 0.000083) ceramic substrates are designed at the center frequency of 2.4 GHz. This compact size, low loss band-pass filter should be useful in many wireless communication systems.

• 出版日期2010-10