Wide stopband single layer quasi-elliptic ultra-wideband bandpass filter

Riaz, Muhammad, Virdee, Bal Singh, Mariyanayagam, Dion and Shukla, Pancham (2021) Wide stopband single layer quasi-elliptic ultra-wideband bandpass filter. International Journal of RF and Microwave Computer-Aided Engineering, 32 (1). pp. 1-6. ISSN 1096-4290

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Abstract / Description

This paper presents the design of a microstrip ultra-wideband (UWB) bandpass filter that exhibits desirable characteristics of low-loss, high selectivity, wide stopband and high out-of-band rejection at room temperature. These characteristics are normally achieved with high temperature superconductor filters that require cryogenic cooling. The design of the proposed filter was realized by exciting multiple resonant modes in a unique Z-shaped microstrip resonator. The admittance of the filter configuration can be tuned prior to fabrication to adjust its center frequency by about 11.5% without affecting the profile of the bandpass response however this can have an impact of the loss. The proposed configuration allows adjustment of the upper and lower transmission zeros defining the bandpass response by 20.5% and 11.4%, respectively, without degrading the overall filter response. The low-loss quasi-elliptic function UWB bandpass filter design was fabricated on a commercially available dielectric substrate using standard PCB technology and its performance verified. The fabricated filter exhibits insertion-loss of 0.68 dB and return-loss better than 17 dB.

Item Type:	Article
Uncontrolled Keywords:	ultra-wideband (UWB) frequency discriminating devices; filters; multimode resonators
Subjects:	600 Technology > 620 Engineering & allied operations
Department:	School of Computing and Digital Media
Depositing User:	Bal Virdee
Date Deposited:	11 Oct 2021 08:29
Last Modified:	07 Oct 2022 01:58
URI:	https://repository.londonmet.ac.uk/id/eprint/7033

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