Texas Instruments Corporation

Clini-Therm Corporation

Kenneth Goldstein

Claude Andrew Sharpe

A printed circuit board structure fabricated to define a plurality of quarter wavelength microstrip antennas, each radiating microwave energy in a dipole pattern. The ends of the microstrip antennas are formed overlapping the ends of adjacent microstrip antennas so that a resultant additive effect of the radiated microwave energy is exhibited near the ends of the antennas. The overall effect is to produce a more uniform radiation pattern which does not have the typical radiation minima located at the ends of the dipole antennas.

Non-invasive quarter wavelength microwave applicator for hyperthermia

A controlled antenna tuner comprises a power amplifier and a microprocessor, an attenuator connected to the power amplifier for selectively controlling the power output, a low pass filter connected to the power amplifier and microprocessor for channel frequency selection, a vertical standing wave ratio (VSWR) circuit inductively connected to the low pass filters output for determining the VSWR of the antenna, an impedance (magnitude) bridge and a phase detector bridge selectively connected to the low pass filter RF output and to the microprocessor for sensing the tuning status of an antenna, and an LC tuner network connected to the phase detector bridge and microprocessor, the microprocessor processing outputs of the impedance and phase detector bridges into tuning signals for the LC tuner to tune the antenna to the selected channel and storing the tuning signals for the selected channel for future use.

Growing community of inventors

Plano, TX, United States of America

Kenneth Goldstein