Worcester Polytechnic Institute

Physical Sciences, Inc.

Neva Electromagnetics, LLC

Other

Gm Global Technolgoy Operations, Inc.

Raytheon Company

The Mathworks, Inc.

Sergey N Makarov

Reinhold Ludwig

Gregory Michael Noetscher

Francesca Scire-Scappuzzo

Viktor Makarov

Diran Apelian

Ara Nazarian

Angelo M Puzella

John A McNeill

Scott W Biederman

Zhi-De Deng

Francesca Sciré-Scappuzzo

Vishwanath Iyer

Patrick Morrison

Shashank Kulkarni

Brian M Foley

The present invention relates to a new on-body dual antiphase antenna design and a plurality of its modifications to better transmit a radio frequency signal into human or animal body, or receive a radio frequency signal from human or animal body. The antiphase transmission and/or reception is achieved by connecting each individual patch antenna to a 180 degrees microwave power splitter or to a 180 degrees microwave power combiner.

Dual antiphase antenna for better signal transmission into human body or signal reception from human body

The present invention relates to a microwave sensing device that uses antennas in the form of a 2&#xd7;1 array with two radiators driven out of phase via a 180 degree power splitter for measuring a radio-frequency signal propagating through a mammalian specimen to obtain an integral estimate of bone density.

Microwave antenna array and testbed for osteoporosis detection

The present invention relates to an electromagnetic device for non-contact injection of strong modulated (0-1000 Hz) electric fields with intensity of 1-2 volts per centimeter into a whole human body at the frequency band 100-500 kHz. The device of the present invention is a low-pass birdcage coil resonator with a very large number of rungs, with two inductively coupled loop feeds, and with a high quality factor of 300.

Whole body non-contact electrical stimulation device with variable parameters

Methods and systems are presented for evaluating performance of a finite or infinite antenna array including a finite number of antennas. Typically, a model is generated for the antenna array, the model including an arbitrarily large antenna array with an arbitrarily large number of model antennas. Each model antenna has features defined by features of antennas of the finite or infinite antenna array. A unit cell is determined for the arbitrarily large antenna, and impedance matrices Zand Zare computed, Zrepresenting interactions among the unit cell and the other model antennas. From these matrices, the performance of the finite or infinite antenna array is assessed.

Method and system for assessing performance of arbitrarily large arrays

A wide-bandwidth antenna (e.g., a rib-dipole antenna) includes a first pole formed by a first conductive member and/or a second pole formed by a second conductive member. The antenna also includes an antenna feed between the first conductive member and the second conductive member. The antenna also includes at least one electrically conductive element including a surface. A portion of the surface is electrically connected to, and extends from, the first conductive member or the second conductive member. The at least one electrically conductive element is capable of conducting a current that generates a magnetic field. The magnetic field lowers a total reactance of the antenna, thereby resulting in enhanced performance of the antenna and more efficient use of volume.

Method and apparatus for a high-performance compact volumetric antenna

An antenna element and balun are described. The antenna includes a plurality of droopy bowtie antenna elements disposed on dielectric block and a feed point. The balun includes a central member having dielectric slabs symmetrically disposed on external surfaces thereof. At least one end of the balun is provided having a shape such that conductors on the dielectric slabs of the balun can be coupled to the the droopy bowtie antenna elements.

Droopy bowtie radiator with integrated balun

Described is an apparatus and method for reducing noise in an information bearing signal is provided. A feeding element receives dual-polarized wideband electromagnetic signals. The feeding element is coupled to a Non-Cutoff Frequency Selective Surface ground plane. The Non-Cutoff Frequency Selective Surface ground plane allows for a line-of-sight signal and a surface wave to cancel. The Non-Cutoff Frequency Selective Surface ground plane can be a metal plate with a plurality of corrugations. The corrugations can be concentric rings, each corrugation having a predetermined height and a predetermined spacing from adjacent corrugations.

Non-cutoff frequency selective surface ground plane antenna assembly

A semiconductor patch antenna for microwave radiation having a wide pin-junction or pn-junction with the depletion region or embodiments having a separating buried oxide (SiO) layer between p- and n-doped regions as the natural resonator volume. Embodiments that do not include a metal ground plane and/or a metal patch are disclosed.

Semiconductor patch antenna

A level sensing system and method for determining the level of a conductive material in a casting mold are disclosed, wherein the level sensing system a drive circuit and an inductive component disposed adjacent to the casting mold, and a position of the conductive material in the casting mold may be determined by a change in an electrical characteristic of the drive circuit.

Non-invasive real-time level sensing and feedback system for the precision sand casting process

The present invention relates to systems of methods of detecting and measuring inclusions in liquid metals. More particularly, non-metallic inclusions having a conductivity level different from the liquid metal melt are forced to migrate and are collected on a measurement surface using electromagnetic Lorentz forces. The inclusions and their concentrations are detected at the measurement surface using either an electrostatic detection system or an optical detection system.

Growing community of inventors

Holden, MA, United States of America

Sergey N Makarov