A miniaturized two pole metamaterial bandpass filter using Ω-shaped IDC for cellular application

A miniaturized two pole metamaterial (MTM) bandpass filter has been presented in this paper. The designed filter is realized with two ohm shaped interdigital capacitor (IDC) to provide series capacitance and via for shunt inductance. The ohm shaped IDC gives better impedance matching in comparison with conventional series gap capacitance. The zeroth order resonance (ZOR) frequency depend on series parameter due to short ended structure. The designed filter offers minimum 0.5dB insertion loss and return loss more than 16.5 dB in passband. Two pole exists at 2.23 GHz and 2.35 GHz due to two ohm shape IDC, which is characterized by its electric field plot. The metamaterial properties of designed filter is verified by dispersion diagram. The proposed filter is modelled by using ANSYS 14.0 and simulated results are experimentally verified. Also comparison is shown by this filter with earlier published similar filters. It is suitable for LTE 2300 and Bluetooth application.