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Nonreciprocal Reflectarray Antennas based on time-modulation

Researchers at the University of California, Davis have developed nonreciprocal and reconfigurable reflectarray antennas based on time-modulation with demonstrated advantages over the state of the art.

Nonreciprocal And Reconfigurable Phased-Array Antennas

Researchers at the University of California, Davis have developed nonreciprocal and reconfigurable phased-array antennas with demonstrated advantages over competing, current technologies.

A Method for Characterization of Device and Material and Communication at Thz Frequencies

UCLA researchers in the Department of Electrical and Computer Engineering have developed a novel method for real-time detection and characterization of pulsed THz waveforms that features differential detection of high sensitivity, and phase diversity to overcome the dispersion penalty for wideband operation.

Time-Domain Mixed-Signal Vector-By-Matrix Multiplier

A time-domain mixed-signal VMM exploiting a modified configuration of 1 MOSFET-1 RRAM (1T-1R) array.

Electronic Device and Method for Scheduling for Enhanced Transmission Efficiency Over a Wireless Communication Network

Existing cellular networks assume that interference from neighboring cells is treated as noise and mobile devices are selected (scheduled) to communicate based on performance metrics for each device. When sliding-window coded modulation (SWCM) is used however, the performance metrics depend on those of interfering devices in neighboring cells, and hence scheduling has to be performed simultaneously over multiple cells.

Apparatus and Method For Transmitting Signal Using Sliding-Window Coded Modulation In A Wireless Network

To meet the demand for wireless data traffic having increased since deployment of 4G communication systems, efforts have been made to develop an improved 5G or pre-5G communication system. Therefore, the 5G or pre-5G communication system is also called a 'Beyond 4G Network' or a 'Post LTE System'.   The 5G communication system is considered to be implemented in higher frequency (mm Wave) bands, e.g., 60GHz bands, so as to accomplish higher data rates. To decrease propagation loss of the radio waves and increase the transmission distance, the beamforming, massive multiple-input multiple-output (MIMO), Full Dimensional MIMO (FD-MIMO), array antenna, an analog beam forming, large scale antenna techniques are discussed in 5G communication systems.   In addition, in 5G communication systems, development for system network improvement is under way based on advanced small cells, cloud Radio Access Networks (RANs), ultra-dense networks, device-to-device (D2D) communication, wireless backhaul, moving network, cooperative communication, Coordinated Multi-Points (CoMP), reception-end interference cancellation and the like.   In the 5G system, Hybrid FSK and QAM Modulation (FQAM) and sliding window superposition coding (SWSC) as an advanced coding modulation (ACM), and filter bank multi carrier(FBMC), non-orthogonal multiple access(NOMA), and sparse code multiple access (SCMA) as an advanced access technology have been developed.   The sliding-window superposition coding (SWSC) is a coding method capable of reaching a theoretical critical value performance of a physical layer in an additive white Gaussian noise (A WGN) interference environment where a fading is not generated, and thus the SWSC has a high efficiency

Transmitter Localization Without Clock Synchronization

Determining the location of a transmitting party in a communication network normally requires a number of identifying factors. The transmitting party can be located through triangulating their signal, using the signal’s arrival at several receivers to determine the transmission’s origin. One can also determine the location of a receiver by comparing the receipt of multiple transmitter signals; however, in both scenarios the transmitter and receiver must employ clock synchronization and signal time-of-travel information to accurately compute relative localization between the two.   The Global Positioning System is a well-known example of this process, leveraging known time (and synchronizing to that time) and position of each GPS satellite to deduce the location of a receiver.  

Advanced Power Management IC’s for Li-Ion Powered Mobile & IoT Devices

Most modern mobile, wearable, and Internet of Things (IoT) devices utilize Li-ion batteries as power supplies. Since the 2.8-4.2V Li-ion output voltage range is not compatible with the 0.6-1.0V voltage requirements of most system-on-chips (SoCs) implemented in scaled CMOS, a DC-DC converter, typically implemented as a discrete power management integrated circuit (PMIC), is placed between the battery and the load.

Cloud- enabled Wireless pH Monitoring in Laboratory Sample Vials

A team of inventors at UCI have developed a miniaturized, wireless pH sensing system capable of monitoring the pH of laboratory samples in real-time with cloud-enabled connections for data collection. The sensor is designed to fit into the caps of standard sample vials, providing continuous measurements and eliminating the need to open vials during sensing.

Extremely Electrically Small Antenna Based On Multiferroics

UCLA researchers in the Department of Mechanical and Aerospace Engineering have developed an extremely electrically small antenna that can be used to transmit or receive electromagnetic radiation within a large range of communication frequencies.

Energy Radiator Using Strain-Mediated Spin Torque Nano-Oscillator (S-STNO)

UCLA researchers in the Department of Mechanical and Aerospace Engineering have developed an energy radiator based on a spin torque nano-oscillator that does not require the application of an external field.

Digital Spur Cancellation Of Fractional Frequency Synthesizer

UCLA researchers in the Department of Electrical and Computer Engineering have developed a digital spur cancellation technique for frequency synthesizers used in clock synchronization.

Method Of Creating Scalable Broadband And Tunable Light Emitter At The Nanoscale Using Layered Black Phosphorus

UCLA researchers in the Department of Electrical and Computer Engineering have developed a novel method to create a room temperature stable broadband tunable light emitter at the nanoscale.

An Electrochemical CMOS Biosensor Array For Point-Of-Care Applications

Point-of-care (POC) testing is essential to halt the spread of deadly infectious diseases (e.g., Ebola, Zika, etc.) and is needed for rapid and accurate screening both in and outside of clinical settings. Label-free bioassays are desirable for POC testing as they have fewer reagents and assay steps resulting in lower cost and ease of use.   Biosensors based on electrochemical impedance spectroscopy (EIS), an ultra-sensitive, label-free sensing technique, are a promising technology for precise and rapid disease diagnosis at the point-of-care. However, EIS usually requires mixers and lock-in detection to measure both the magnitude and phase of the complex impedance.

Wideband Distributed Mixers

This technology is a simple, novel ultra wideband distributed complementary metal-oxide-semiconductor mixer, which incorporates on-chip distributed transmission line. A wideband distributed mixer is capable of operation over a wide range of frequencies, and can carry large amounts data up to 250 feet, which makes it attractive for military and law-enforcement use.

Beam Controllable Patch Antenna

UCLA researchers in the Department of Electrical and Computer Engineering have developed a compact single-patch antenna with a beam scanning capability that maintains a high radiation efficiency.

A 3D Microfluidic Actuation and Sensing Wearable Technology for In-Situ Biofluid Processing and Analysis

UCLA researchers in the Department of Electrical and Computer Engineering have developed a novel wearable biosensor capable of measuring biomarkers in real time through biofluids like sweat.

Privacy Preserving Stream Analytics

UCLA researchers in the Department of Computer Science have developed a new privacy preserving mechanism for stream analytics.

Magnetic Pendulum Array for Efficient Wireless Power Transmission

UCLA researchers in the Department of Electrical Engineering have developed a novel magnetic pendulum array based mechanical antenna system for near field wireless power transfer with a 2-3 orders of magnitude improvement in quality factor.

Frequency Translating Backscatter Modulator With Envelope Control To Support OFDM/QAM And Other Envelope Modulated Wireless Protocols

UCLA researchers in the Department of Electrical Engineering have developed a new modulator that provides both phase and frequency control.

Reduction Of Unmodulated Ambient Blockers In Reflected Data Links Through Manipulation Of Replication Of The Illuminating Signal Source

Researchers at the UCLA Department of Electrical and Computer Engineering have developed a new method to eliminate a power amplifier from the transmitter chain in a wireless data link, while overcoming the effects of ambient reflections.

Quality interference from living digital twins in IoT-enabled manufacturing systems

Researchers at UCI have developed a non-intrusive method for building a virtual replica of manufacturing machine, which allows for accurate diagnostics of the state of the system. This provides manufacturers with real-time information on quality control and immediately identifies any malfunctions in the system.

High Electromechanical Coupling Disk Resonators

Capacitive-gap transduced micromechanical resonators routinely post Q several times higher than piezoelectric counterparts, making them the preferred platform for HF and low-VHF (e.g. 60-MHz) timing oscillators, as well as very narrowband (e.g. channel-select) low-loss filters. However, the small electromechanical coupling (as gauged by the resonator's motion-to-static capacitance ratio, Cx/Co) of these resonators at higher frequency prevents sub-mW GSM reference oscillators and complicates the realization of wider bandwidth filters. To address this situation, researchers at UC Berkeley developed a capacitive-gap transduced radial mode disk resonator with reduced mass and stiffness. This novel Berkeley disk resonator has a measured electromechanical coupling strength (Cx/Co) of 0.56% at 123 MHz without electrode-to-resonator gap scaling. This is an electromechanical coupling strength improvement of more than 5x compared with a conventional radial contour-mode disk at the same frequency. This increase should help improve the passbands of channel-select filters targeted for low power wireless transceivers and lower the power of MEMS-based oscillators.  

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