Metamaterial-Inspired Quad-Band Notch Filter for LTE Band Receivers and WPT Applications

TL;DR

This paper introduces a compact quad-band notch filter based on E-CRLH transmission lines, effectively eliminating four specific frequencies for LTE receivers and WPT systems, validated through simulations and theoretical analysis.

Contribution

A novel compact quad-band notch filter design using E-CRLH TL for LTE and WPT applications, with validated performance and high rejection levels.

Findings

Rejection greater than 20dB at target frequencies

Good agreement between simulation and theoretical models

Compact size of 20x22 mm on FR-4 substrate

Abstract

A new compact quad-band notch filter (QBNF) based on the extended composite right and left-handed transmission line (E-CRLH TL) has been presented. As known, E-CRLH TL behaves like a quad-band structure. A microstrip TL which is loaded with an open-ended E-CRLH TL is presented as a QBNF. Four unwanted frequencies were used in a dual-band LTE receiver as four notch frequencies which must be eliminated (0.9 GHz, 1.3 GHz, 2.55 GHz, and 3.35 GHz). Also, this QBNF can be applied to simultaneous wireless power and data transfer (SWPDT) system to isolate the wireless power circuit from the data communication circuit. A design technique for the proposed QBNF is presented and its performance is validated using full-wave simulation results and theoretical analysis. The main advantage of this design is an overall rejection greater than 20dB at selected unwanted frequencies. Good agreements between the full-wave simulation and equivalent circuit model results have been achieved which verified the effectiveness of the proposed circuit model. The proposed QBNF is designed on an FR-4 substrate and the dimension of the proposed QBNF is 20X22 mm.