Donald R. Singh

W-Band Microstrip Oscillator Using InP Gunn Diode

A low cost, light weight, rugged microstrip oscillator with a very simple structure has been developed in W-Band (34 GHz). The active element is an InP Gunn device operating in its fundamental mode of oscillation. The oscillator provides 35 mW of CW output power and a bias tuning bandwidth of 400 MHz.

Optical microwave cellular systems for plant automation

As large factories, chemical plants and oil refineries become more and more automated, it becomes necessary to relay information from a large number of sensors to central control sites. In addition, it has also become important to transmit large amoutns of information in the form of data, voice, video, etc., to workers around the plant or factory. A unique technique based on optical microwave cellular system is described which is highly suitable for such an application.

Coplanar Schottky waveguides for microwave phase shifting, attenuation and harmonic generation

A coplanar Schottky waveguide device developed for phase shifting, attenuation, and harmonic generation applications in the microwave region is described. The device has micron size features, and has the added advantage of low cost, small size, and simple structure. It has the unique feature of combining several circuit functions into one elemental device. The theory, fabrication and design, and experimental results are presented.<<ETX>>