Accession Number : ADD004983

Title :   Programmable Microwave Modulator.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Beno,Lawrence A ; Doi,Kazumasa

Report Date : 20 Sep 1977

Pagination or Media Count : 8

Abstract : This patent describes a programmable microwave modulator for controlling the amplitude of a microwave signal versus time. A programmed driver generates a linear analog signal that has a predetermined amplitude pattern and time period. The linear analog signal from the programmable driver passes through a linearized current driver before inputting a PIN attenuator. The linearized current driver takes the antilogarithm of the linear analog signal, thus compensating for the logarithmic nonlinearity of the PIN attenuator. A radio frequency signal from a receiving antenna inputs the PIN attenuator and is attenuated as a function of the amplitude pattern of the linear analog signal. The PIN attenuator outputs the attenuated radio frequency signal. (Author)

Descriptors :   *Patents, *Modulators, Automatic programming, Microwave equipment, Solid state electronics, Control systems, Drives(Electronics)

Subject Categories : Electrical and Electronic Equipment
      Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE