Abstract This paper presents accurate small-signal modeling of RF CMOS, valid from DC to GHz ranges, using device simulation and analytical modeling. Distributed NQS effects in terms of circuit parameters are discussed and an estimation of the limit up to which quasi-static MOSFET models are reasonable is presented. The impact of the substrate network through gmb multiplication on terminal ac c...

Access to an accurate small-signal equivalent circuit model is an important step in circuit design. Reliable small signal extraction procedures readily useable by the designer are now required in millimetre-wave designs because many foundry process development kits do not support millimetre wave frequency design. The extraction procedures successful at lower frequencies for lumped circuit extra...

A low cost solution for constructing receiver signal points is investigated that combines a large number of constrained radio frequency (RF) frontends with a limited number of full RF chains. The constrained RF front ends have low cost and are limited to on/off switching of antenna elements and a small number of phases. Severe degradations are typically observed for multi-user MIMO for these si...

A theoretical formulation characterizing the noise performance of strain estimation using envelope signals is presented for the cross-correlation based strain estimator in elastography, using a modified strain filter approach. The strain filter describes the relationship among the elastographic signal-to-noise ratio (SNRe), sensitivity, contrast-to-noise ratio and dynamic range for a given reso...

Radio frequency (RF) signal processors based on photonics have several advantages, such as broadband capability, immunity to electromagnetic interference, flexibility, and light weight in comparison to all-electronics RF filters. It still requires innovative research and development to achieve high-resolution reconfigurable photonic RF signal processors featuring high selectivity, resolution, w...

In conventional spin echo (SE) imaging, the longitudinal magnetization (that is generated by the presence of the main magnetic field, B0) is tipped into the transverse plane using a radiofrequency (RF) pulse that tips the magnetization 90 degrees. Once in the transverse plane, the magnetization rotates, or precesses, around the axis of the main magnetic field. As the transverse magnetization pr...

Recent studies showed that conventional approaches being used to solve problems imposed by hard-wired metal interconnects will eventually encounter fundamental limits and may impede the advance of future ultralarge-scale integrated circuits (ULSIs). To surpass these fundamental limits, we introduce a novel RF/wireless interconnect concept for future interand intra-ULSI communications. Unlike th...

A novel passive phase correction method for stable fiber transfer of radio-frequency (RF) signal is proposed and demonstrated. By employing only one local oscillator and two frequency mixers in the local station, an RF signal received by an optical remote antenna unit is transmitted to the local station with very small phase jitter. An experiment is performed. When a 6 GHz RF signal is delivere...

In this paper, the large-signal characterization of 94 GHz typeIIb semiconducting diamond based Double-Drift Region (DDR) Impact Avalanche Transit Time (IMPATT) has been carried out by using a large-signal simulation method developed by the authors based on non-sinusoidal voltage excitation. The simulation is carried out to obtain the large-signal characteristics such as largesignal device admi...

Purpose: Patients with many types of common implants, including pacemakers and neurostimulators, are ineligible for MR scans due to the potential for tissue heating arising from RF coupling between the excitation field and their device. The severity of this coupling can be detected by reversing the RF polarization in the birdcage RF receiver. Ideally, this results in MR signal only around coupl...