Wisconsin Alumni Research Foundation

Technology

Improved Mobile User Localization

The rapid proliferation of wireless devices has caused a surge in data rates. Higher frequencies including millimeter wave frequencies (30-300 GHz) are being explored to address the spectrum crunch. ...
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Akbar Sayeed | P140393US01

Technology

New MIMO Transceiver Cuts Costs, Complexity

In a multiple-input, multiple-output (MIMO) system, multiple antennas are used at both the transmitter and receiver to improve communication performance. MIMO systems are key to high capacity communic...
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Akbar Sayeed, John Brady | P150112US01

Technology

Wideband Transceiver for Antenna Array

Wideband high-dimensional antenna arrays are expected to play a key role in future wireless systems. Due to narrow bandwidths, phased array/beamforming methods are the natural choice when it comes to ...
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Akbar Sayeed, John Brady | P150113US01

Technology

More Efficient Semiconductor Lasers

Quantum cascade lasers (QCLs) are semiconductor lasers that provide light in the mid- and far-infrared wavelength ranges. They are designed so that the generated light is transverse-magnetic (TM) pola...
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Luke Mawst, Dan Botez, Thomas Earles, Jeremy Kirch, Christopher Sigler | P140047US01

Technology

Enhanced Traveling Wave Tube

A traveling wave tube (TWT) is a vacuum electronic device that acts as a microwave amplifier capable of providing high gain and high output power. TWTs are used in many wireless devices like radar sys...
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Nader Behdad, Arash Rashidi Tarhani | P140188US01

Technology

Low-Profile, Ultrawide Band Antenna

Monopole antennas are a type of radio antenna consisting of a straight, rod-shaped conductor often mounted perpendicularly over a conductive surface (a ‘ground plane’) such as the earth. T...
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Nader Behdad, Seyed Mohamad Amin Momeni Hasan Abadi | P130215US01

Technology

An Improved Method for Analyzing Wireless Broadcasts

In wireless telecommunications, signals are transmitted and received over transmission channels within a limited range of frequencies, typically between 0.7 GHz to 6 GHz for domestic applications. Due...
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Akbar Sayeed, Robert Nowak, Waheed Bajwa, Jarvis Haupt | P09135US

WARF