Wideband microstrip quasi-elliptic function bandpass filter with high out-of-band rejection

Virdee, Bal Singh, Riaz, Muhammad, Shukla, Panchamkumar, Onadim, Muhittin and Ouazzane, Karim (2019) Wideband microstrip quasi-elliptic function bandpass filter with high out-of-band rejection. Microwave and Optical Technology Letters. pp. 1-6. ISSN 0895-2477

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Abstract / Description

Presented in this article is a novel and compact quasi‐elliptic function bandpass filter based on microstrip technology that exhibits a high out‐of‐band rejection over a very wide frequency range. The design comprises stub‐loaded half‐wavelength resonators that are electromagnetically coupled to resonant structures that are interdigitally coupled to the input and output feed‐lines. Perturbation introduced by the presence of the stub causes the resonators to act as a multimode device. In addition, the stub introduces two transmission zeros to significantly improve the filter's passband selectivity and suppress harmonic and spurious modes. This configuration yields a wideband response with low insertion loss of 0.73 dB, high return‐loss <20 dB, and out‐of‐band rejection level >40 dB across 2‐4.5 GHz and 5.74‐16 GHz. The planar filter structure can be easily manufactured using standard PCB technology.

Item Type: Article
Additional Information: ** Article version: VoR ** From Crossref via Jisc Publications Router ** Licence for VoR version of this article starting on 21-02-2019: http://onlinelibrary.wiley.com/termsAndConditions#vor
Uncontrolled Keywords: quasi-elliptic bandpass filter, interdigital coupled feed-line, wideband,wide stopband
Subjects: 600 Technology > 620 Engineering & allied operations
Department: School of Computing and Digital Media
SWORD Depositor: Pub Router
Depositing User: Pub Router
Date Deposited: 15 Apr 2019 11:38
Last Modified: 15 Apr 2019 11:38
URI: http://repository.londonmet.ac.uk/id/eprint/4693

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