A5043070966- Radio Frequency Integrated Circuit Design
- Full-Duplex Wireless Communications
- Microwave Engineering and Waveguides
- Synthesis and Properties of Aromatic Compounds
- Advanced Power Amplifier Design
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Organic and Molecular Conductors Research
- Magnetism in coordination complexes
- Millimeter-Wave Propagation and Modeling
- Advanced Antenna and Metasurface Technologies
- Energy Harvesting in Wireless Networks
- Antenna Design and Analysis
University of Waterloo
2001-2022
Qualcomm (Canada)
2022
University of Arkansas at Fayetteville
2001
University of Kentucky
2001
We report the preparation and solid-state characterization of perchlorophenalenyl radical (1). The is initially obtained as a yellow-green solid by reduction perchlorophenalenium salt (12+). This sublimes in sealed tube to give black shiny hexagonal crystals structure consists 1-dimensional stacks monomeric radical. peri-chlorine atoms force phenalenyl system be strongly nonplanar leading large separation between adjacent molecules within (3.78 Å), adopt two distinct stacking motifs...
This letter proposes a uniformly distributed near-field (NF) probing array (NFPA) capable of generating feedback signals suitable for monitoring and improving the performance 5G millimeter-wave (mm-wave) beamforming transmitter. The proposed NFPA configuration is carefully designed to ensure comparable coupling ratios between individual RF chain outputs closest NF probes, across wide frequency range. maximizes quality signal available perform calibration digital predistortion (DPD) when...
This article proposes a novel method to train the digital predistortion (DPD) function in radio frequency (RF) beamforming array using feedback signals acquired from near-field-based transmitter observation receiver (NF-TOR). Accordingly, proposed DPD training relies only on information/signals available at side and does not require deployment of far-field (FF)-based TOR. The starts by first identifying coefficients propagation channels between radiating antennas NF probes. These channel are...
In this paper we present a grounded patch antenna that was designed and fabricated using combination of the low-cost high-throughput techniques screen printing transfer printing. The advantage these is they allow ground plane to be printed in single step. Conductive thread conductive connecting snaps were built into for purpose attaching integrated circuits sensing devices. demo case, meet 900MHz band LoRa networks.
This paper proposes a dual-input single-output (DISO) digital predistortion (DPD) scheme to mitigate the nonlinearity in millimeter-wave RF beamforming arrays when driven by two non-contiguous intra-band signals. Starting from pass-band Volterra series expression, derives complex baseband DISO DPD model linearize behaviour of under such multi-carrier signal excitation. The proposed is then validated measurements on 64-element array 200 MHz orthogonal frequency-division multiplexing signals...