Highly selective dual-band interdigital bandpass filter for C-band applications

Zakaria El Ouadi, Asma Khabba, Jamal Amadid, Saida Ibnyaich, Abdelouhab Zeroual, Tole Sutikno


Miniaturization in the telecommunications field is deemed a current challenge and a critical demand in order to improve communication quality between the transmitter and the receiver while avoiding clutter issues. The main objective of this work is to design a miniature interdigital bandpass filter (IBF) using planar technology. The proposed bandpass filter is made up of three equidistant parallel-coupled lines carefully deposited on a small Rogers-5880 substrate possessing a full dimension of 10×10×1.6 mm3, a relative permittivity =2.2, and a loss tangen of 0.0009. The proposed IBF has been designed and simulated using the HFSS software, which is a simulator that studies the electromagnetic behavior of radio frequency structures using cutting-edge finite element solvers. The reached outcomes present good electrical performance in terms of insertion loss , reflection coefficient , voltage standing wave ratio (VSWR), and selectivity, making the proposed IBF suitable for integration in small electronic devices for C-band applications (4 GHz to 8 GHz).


C-band; dual-band; interdigital bandpass filter; microwave filters; parallel-coupled lines;

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DOI: http://doi.org/10.12928/telkomnika.v22i1.25601


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TELKOMNIKA Telecommunication, Computing, Electronics and Control
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