Lockheed Sanders, Inc.

Massachusetts Institute of Technology

Mountain Dynamics, Inc.

Other

Lockheed Martin Corporation

Transcept, Inc.

Collision Communications, Inc.

Karl D Brommer

John Dimitris Joannopoulos

Rachel E Learned

Joshua D Niedzwiecki

Robert B MacLeod

Henry Mullaney

Thomas G Hebert

Thomas P McElwain

Matthew A Taylor

Robert D Meade

Andrew Rappe

Peter J Schibly

John Joanopoulos

Edward D Russell

An apparatus and method reducing interference between multiple frequency modulated, FM, voice transmissions present in the same frequency bandwidth by receiving a radio signal which includes a first FM voice signal to be demodulated along with one or more additional FM voice signals which are present within a modulation bandwidth of the first FM voice signal, detecting the presence of a carrier frequency signal of the first FM signal and determining a lack of modulation of the detected carrier frequency signal by a voice signal, and squelching the received signal when the carrier signal is unmodulated.

Apparatus and method for reducing co-channel radio interference

A balance training device for sports such as skiing and skating uses force sensors located to sense forward pressure between a boot and the wearer thereof and electrical components to generate immediate feedback to the wearer.

Boot balance training device

A relocatable ski camber sensor provides active sports training for skiing and the like including levers extending from a planar surface to be sensed for camber, a force sensitive resistor affixed to one of the levers, a resilient compressible element for applying varying amounts of compressive force to the sensitive resistor, and a device for indicating a predetermined amount of sensed camber.

Relocatable electronic ski camber sensor

Low-loss dielectric resonant devices having lattice structures with

A filter utilizes a frequency selective, non-conductive, dielectric structure for filtering electromagnetic energy in the millimeter to far infrared frequency bands. The filter includes a non-conductive, high-dielectric, background material positioned to receive incident electromagnetic energy. A lattice structure comprised of a plurality of elongated elements formed of a non-conductive, high-dielectric material are disposed in a two-dimensional, periodic arrangement in the background material. The elements extend in parallel to one another through the background material for providing a range of frequencies over a band gap in which incident electromagnetic energy within the frequency range of the band gap is substantially prevented from propagating through the lattice structure. The dielectric structure can be adapted to operate as a band stop filter or a low pass filter.

Filter utilizing a frequency selective non-conductive dielectric

A dielectric resonator comprising a resonant defect structure disposed in a lattice structure formed of a plurality of multi-dimensional periodically arranged dielectric elements confines electromagnetic energy within a frequency band in the photonic band gap. The frequency band of the confined electromagnetic energy is tunable. The unique structure of the dielectric resonator leads to reduced power dissipation losses when used in microwave and millimeter wave components. Accordingly, the dielectric resonator

Low-loss dielectric resonator having a lattice structure with a resonant

An apparatus and method for determining the direction of origin of a received transmission signal using a spinning antenna pair generally provides the steps and apparatus for measuring the phase difference between signals simultaneously received, coarsely approximating the direction of origin of the transmission signal, reconstructing a phase difference signal using the measured phase differences and a calculated signal based upon the coarse approximation, correcting the reconstructed phase signal based upon the first derivatives of the reconstructed signal and the calculated signal, and determining the direction of origin based upon the corrected reconstructed phase signal.

Transmission signal direction finding apparatus and method

Growing community of inventors

Hampton Falls, NH, United States of America

Karl D Brommer