Abstract: Methods and apparatus for measuring the millimeter or submillimeter wave absorption spectra in a sample of DNA molecules are provided.

Abstract: A controller for driving an ultrasonic transducer is disclosed and includes a processor, responsive to a feedback signal, for generating control signals to an output driver which is responsive to the control signals, to cause the ultrasonic transducer to generate ultrasound having a power level corresponding to the control signal. The controller is preferably attached to a sensing circuit to determine the amount of ultrasound conductive gel associated with the ultrasonic transducer, and for generating the feedback signal therefrom. The controller includes data logging capabilities to record treatment data and prevent unnecessary extended treatment. The controller creates an environment for safer ultrasonic self-treatment by patients. The microprocessor used in the controller can be used to warn of a low battery condition or insufficient amount of ultrasound conducting gel.

Abstract: A traveling array antenna which operates at microwave/millimeter frequencies is disclosed in which a like number of radiator elements are arranged in two mirror image branches, an RF signal feed is fed through a 180 degree compensating power splitter to each branch of the antenna array, each of the radiator elements includes an impedance matching transformer connected at its input side and in which a radiator terminating patch is connected to the end of each of the two mirror image branches.

Abstract: A frequency-scan traveling wave antenna receives radio frequency (RF) energy at an input port, passes the energy through a quarter wave transformer to a first radiator element in an array of radiator elements, each pair of radiator elements being connected by a respective delay line. Each radiator element includes an input port of known characteristic impedance connected to an impedance matching section which compensates for that element's radiated power. Each radiator element has an output port with a section of transmission line disposed between a main radiator section of said radiator element and said output port, and impedance matched to the output port. In one embodiment, each delay line includes a plurality of delay line sections, with adjacent delay line sections being mutually perpendicular. In a second embodiment, each delay line includes a plurality of delay line sections disposed in meandering form.