Investigation into microstrip dual-mode bandpass filters (BPFS) with in-line feed-line configurations

✍ Scribed by JiaLin Li; JianXin Chen; Quan Xue

• Publisher: John Wiley and Sons
• Year: 2006
• Tongue: English
• Weight: 325 KB
• Volume: 48
• Category: Article
• ISSN: 0895-2477
• DOI: 10.1002/mop.21845

✦ Synopsis

Based on the geometry relationship of the conventional dual-mode ring resonators, this study concisely describes the operation principle of a kind of dual-mode resonator filters with in-line feed-lines. The investigated filter topology is fed by two pairs of orthogonal branch lines and can realize in-line configuration for the input and output (I/O)

ports, which is useful in many practical applications. Meanwhile, the influences of feed-lines on transmission-zeros (TZs) are, for the first time, investigated to guide the design of this kind of filters. Several demonstrators are designed and examined, and good results are obtained.