Design of compact microstrip bandpass filter using square DMS slots for Wi-Fi and bluetooth applications

A. Belmajdoub (Universityof Sidi Mohamed Ben Abdellah)
M. Jorio (Universityof Sidi Mohamed Ben Abdellah)
S. Bennani (Universityof Sidi Mohamed Ben Abdellah)
A. Lakhssassi (University of Quebec)
M. Amzi (Universityof Sidi Mohamed Ben Abdellah)

TELKOMNIKA (Telecommunication Computing Electronics and Control)
Vol 19, No 3: June 2021

This paper presents the design of a compact bandpass filter based on two identical rectangular resonators and is implemented on microstrip technology for Wi-Fi and bluetoothapplications. To reduce the size of the filter, the defected microstrip structure (DMS) technique is proposed. This technique consists of etching slots in the rectangular resonator, which results in a change in the line properties and increase of the effective inductance and capacitance. This feature is used for miniaturization. The designed filter has a compact size (6.82x8.3) mm² with a low insertion loss of -0.1 dB and a good return loss of -36 dB. The simulation results are realized using the (computer simulation technology) CST Microwave software.