摘要
A new design scheme for the wideband filters with the low temperature co-fired ceramic (LTCC) technology is proposed in this letter. Based on the traditional second-order combline filter, an extra shunt capacitor is added in the middle of the coupled line, and a new transmission zero is thus obtained. The proposed design not only possesses excellent selectivity at both sides of the passband, the fractional bandwidth can also be as wide as 86%. To validate the design scheme, the proposed technique is applied to the third-order combline filter and realized by using the LTCC technology. The wide-band filter with passband of 3.15.1 GHz is obtained. With four transmission-zeros, the selectivity and out-band rejection of the third-order filter is further improved from those of the second-order designs.
| 原文 | ???core.languages.en_GB??? |
|---|---|
| 文章編號 | 5109494 |
| 頁（從 - 到） | 452-454 |
| 頁數 | 3 |
| 期刊 | IEEE Microwave and Wireless Components Letters |
| 卷 | 19 |
| 發行號 | 7 |
| DOIs | |
| 出版狀態 | 已出版 - 7月 2009 |