English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

A novel design of planar dual and triple narrow-band bandstop fllter is presented by adopting the proposed meandered slot defected microstrip structure (MS-DMS) and the simplifled spiral microstrip resonator (SSMR). Through this design, the stopbands of the dual- and triple-band bandstop fllters can be individually controlled and the improved spurious responses are achieved. First, the fundamental and the flrst spurious resonances of the MS-DMS and SSMR are analyzed to provide the design rules. Then, by utilizing the prominent stopband of the MS-DMS and the stopband produced by the SSMR coupled to main microstrip line, a dual narrow- band bandstop fllter is constructed before its design procedure is outlined. Based on above investigations, a triple narrow-band bandstop fllter is implemented by inserting extra SSMRs to another side of the main microstrip line of the dual-band fllter to generate a new stopband. To verify the aforementioned design concepts, a dual and triple narrow-band bandstop fllter are designed, simulated and tested. Both the simulation and measurement indicate that the fabricated fllters exhibit good stopband/passband performance and improved flrst spurious resonance. Moreover, these fllters are simple to design and quite compatible with planar fabrication technique, making them very attractive for practical applications.

DESIGN OF PLANAR DUAL AND TRIPLE NARROW-BAND BANDSTOP FILTERS WITH INDEPENDENTLY CONTROLLED STOPBANDS AND IMPROVED SPURIOUS RESPONSE