Miniaturized Ultra-wide Stopband Bandpass Filter for WiMAX Applications

Subject Areas : Electronics

Saeid Jafari ¹ (Department of Electrical Engineering, Sanandaj Branch, Islamic Azad University, Sanandaj, Iran.)
Farzin Shama ² (Electrical Engineering Department, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran)
Abbas Ghadrdan ³ (Electrical Engineering Department, Shahed University, Theran, Iran)
Mohammad Saeed Feali ⁴ (Electrical Engineering Department, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran)
Mohammad Amir Korani ⁵ (Department of Electrical Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran)
Mohammad Amir Sattari ⁶ (Electrical Engineering Department, Faculty of Engineering, Razi University, Kermanshah, Iran)

Received: 2023-10-18 Accepted : 2024-04-12 Published : 2024-07-14

Keywords: Bandpass Filter, Microstrip, Miniaturized, Narrow-band,

Abstract :

In this research, a miniaturized narrow-band bandpass filter is presented. The design procedure has been started using a coupled structure and the final circuit has been bent to reduce the circuit size. The operational frequency is located at 3.6 GHz with an acceptable sharpness in the transition bands. In the passband, both the insertion and return loss are 0.6 and 27 dB, respectively. The obtained fractional bandwidth of the filter is about 2%, which is highly appropriate for a special-purpose narrow-band BPF. The presented BPF has been fabricated on an RT/Dourid5880 substrate. The obtained results of the fabricated circuit are consistent with the simulation one.