Novel microwave balanced bandpass filter with high common mode rejection ratio and wide rejection band under common mode operation

Jose-Luis Olvera-Cervantes, Alonso Corona-Chavez, Tejinder Kaur and Miguel-Antonio Romero-Ramirez

Journal of Electromagnetic Waves and Applications, 2019, vol. 33, issue 12, 1644-1651

Abstract: In this work, a new balanced band pass filter and its design procedure are proposed. The filter is based on a novel resonator, named LTLC resonator, which consists of two inductors (L), two Transmission Lines (TLs) and one capacitor (Cs). The resonators are designed by using its equivalent circuits and its design equations which are presented in this work. The filter exhibits central frequency at f0d = 0.988 GHz, Fractional Band Width (FBW) of 10.1%, Common Mode Rejection Ratio (CMRR) better than 51 dB at the center frequency, Common Mode (CM) rejection better than −40 dB from 0.5 GHz to 3.3f0d and better than −30 dB from 0.5 GHz to 4f0d. This paper includes analysis, design methodology and experiments.

Date: 2019
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DOI: 10.1080/09205071.2019.1626294

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