A Digitally Assisted Nonlinearity Mitigation System for Tunable Channel Select Filters

High-κ dielectrically transduced MEMS thickness shear mode resonators and tunable channel-select RF filters

Electrically coupled, high quality factor (Q), tunable channel-select ladder filters comprised of dielectrically transduced thickness shear mode esonators are presented using integrated circuit compatible bulk micromachining technology. The filters are fabricated on the 3.2 m thick device ayer of heavily doped SOI wafers with a 20 nm thick hafnium dioxide film sandwiched between the polysilicon...

Metamaterials with Tunable Nonlinearity

PAPR and Fiber Nonlinearity Mitigation of DFT-Precoded OFDM System

High Peak-to-Average Power Ratio (PAPR) is one of the major drawback of Orthogonal Frequency Division Multiplexing (OFDM) based systems that can cause intermodulation among the subcarriers due to the nonlinearities of the fiber. The high PAPR increases the complexity of the Analog to Digital (A/D) and Digital to Analog (D/A) converters. In this paper, I present an analysis of Discrete Fourier T...

Tunable Wideband Graphene based Filters in THz Band

In this paper, a procedure for analyzing and designing of tunable wideband band-pass and band-stop graphene based filters in the terahertz band is proposed. These planar wideband plasmonic filters are unique in their kind. With this procedure, it is possible to design filters with the desired functional characteristics in the form of the similar quarter-wavelength resonance stubs. The discontin...

Quantum superinductor with tunable nonlinearity.

We report on the realization of a superinductor, a dissipationless element whose microwave impedance greatly exceeds the resistance quantum R(Q). The design of the superinductor, implemented as a ladder of nanoscale Josephson junctions, enables tuning of the inductance and its nonlinearity by a weak magnetic field. The Rabi decay time of the superinductor-based qubit exceeds 1 μs. The high kine...