Band-pass filters using high-permittivity ceramics substrate

✍ Scribed by Cheng-Liang Huang; Shin-Tung Tasi; Yuan-Bin Chen

• Book ID: 102949510
• Publisher: John Wiley and Sons
• Year: 2010
• Tongue: English
• Weight: 537 KB
• Volume: 52
• Category: Article
• ISSN: 0895-2477
• DOI: 10.1002/mop.25439

✦ Synopsis

Abstract

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~ (ε~r~ = 9.7, tanδ = 0.0001) and 0.875Mg~0.95~Zn~0.05~TiO~3~‐0.125Ca~0.8~Sm~0.4/3~TiO~3~ (ε~r~ = 23.5, tanδ = 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. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2344–2347, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.25439