End-coupled microstrip slow-wave resonator filtlers using high-permittivity ceramic substrate

✍ Scribed by Cheng-Liang Huang; Shih-Sheng Liu

• Book ID: 102522953
• Publisher: John Wiley and Sons
• Year: 2009
• Tongue: English
• Weight: 170 KB
• Volume: 51
• Category: Article
• ISSN: 0895-2477
• DOI: 10.1002/mop.24366

✦ Synopsis

The miniaturization of end-coupled microstrip slow-wave resonator filters using two high-permittivity ceramic substrates (with respective dielectric constants of 9.7 and 25.45) were investigated. The designed end-coupled structures were simulated using an IE3D simulator. The responses of the fabricated filters using Al 2 O 3 ( r ϭ 9.7, tan ␦ ϭ 0.000036) and newly developed 0.85MgTiO 3 -0.15Ca 0.6 La 0.8/3 TiO 3 ( r ϭ 25.45, tan ␦ ϭ 0.00002) ceramic substrates were designed to have a center frequency of 1.8 GHz. The proposed filter showed not only a tremendous reduction in the insertion loss but also demonstrates a marvelous cut in its size.