Dual Mode Bandpass Filter Using Fractal Structure Based on Circular Ring Resonator and Defected Ground Structure

Ramin Maani Arjestan; Hamid Khodabakhshi

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International Journal of Innovative Research in Electronics and Communications

Volume 2, Issue 7, 2015, Page No: 1-5

Dual Mode Bandpass Filter Using Fractal Structure Based on Circular Ring Resonator and Defected Ground Structure

Ramin Maani Arjestan¹, Hamid Khodabakhshi¹

1.Department of Communication , College of Electrical Engineering, Yadegar-e-Imam Khomeini (RAH) Shahre Rey Branch, Islamic Azad University Tehran, Iran.

Citation : Ramin Maani Arjestan,Hamid Khodabakhshi, Dual Mode Bandpass Filter Using Fractal Structure Based on Circular Ring Resonator and Defected Ground Structure International Journal of Innovative Research in Electronics and Communications 2015, 2(7) : 1-5

Abstract

In this paper, a narrow band bandpass filters (BPF) using fractal structure and Defected Ground Structure (DGS) is introduced to eliminate the unwanted second harmonic. The centeral frequency and bandwidth of the filter is 1.52 GHz and 3.3%, respectively and used in Global Positioning System (GPS). At first, the bandpass filter is designed with two transmission zeros in passband using fractal structure to increase the selectivity and reduce the size of the ring resonator structure to 75%. The second harmonic is then removed by DGS structure.

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