On-Chip Solutions for Future THz Imaging Spectrometers

The mysteries of the early Universe are largely enshrouded in dust, product of the violent process of star formation. Due to the vast distances of our Universe, infrared light emitted by the heated dust back in those early stages can still be observed today, which has been observed to contribute to about half of the total cosmic background...

Physical Layer Defense against Eavesdropping Attacks on Low-Resolution Phased Arrays

Eavesdropping attacks are a severe threat to millimeter-wave (mmWave) networks that use low-resolution phased arrays. Although directional beamforming in mmWave phased arrays provides natural defense against eavesdropping, the use of low-resolution phase shifters induces energy leakage into unintended directions. This energy leakage can be...

A 23.8–30.4-GHz Vector-Modulated Phase Shifter With Two-Stage Current-Reused Variable-Gain Amplifiers Achieving 0.23° Minimum RMS Phase Error

This letter presents a millimeter-wave (mm-wave) vector-modulated phase shifter (VMPS) for phased-array applications. To improve the phase-shift accuracy without drastically increasing design complexity, the proposed VMPS structure employs variable-gain amplifiers (VGAs) that offer 2× better resolution at their low-gain...

Design and Implementation of a Superconducting Phase-Shifter

Superconducting detectors such as Microwave Kinetic Inductance Detectors (MKIDs) have lead to the designs of THz on-chip spectrometers such as DESHIMA. With DESHIMA a wideband THz signal is fully sampled by several hundreds of channels of which the frequency is defined by an array of band-pass filters. Each band-pass filter which is connected to...

Mm-wave passive components for integrated phased array antennas

Millimeter-Wave Phased-Array Transmitter in CMOS

Beyond digital interference cancellation

One of the major drawbacks towards the realization of MIMO and multi-sensor wireless communication systems is that multiple antennas at the receiver each have their own separate radio frequency (RF) front ends and analog to digital converter (ADC) units, leading to increased circuit size and power consumption. Improvements in RF and ADC...