Agilent 1964-11 free download

File name 1964-11.pdf

HEWLETT-PACKARD JOURNAL T E C H N I C A L I N F O R M A T I O N F R O M T H E - d p - L A B O R A T O R I E S Vol. 16, No. 3 PUBLISHED BY THE HEWLETT-PACKARD COMPANY, 1501 PAGE MILL ROAD, PALO ALTO, CALIFORNIA NOVEMBER, 1964 Absorption Modulators for Simple or Complex Microwave Modulation High-performance diode modulators permit microwave modulation by signals ranging from fast waveforms to dc control voltages without frequency reaction AMPLITUDE and pulse modulation of micro wave oscillators have always presented cer tain problems to the microwave engineer because of the undesirable 'moding' and in cidental FM that can occur when modulating signals are applied to an element in the microwave tube. Because of these problems, much interest has been shown in modulation techniques which allow the microwave oscillator itself to operate unmodulated while a diode switch gates the power on the output transmission line. These systems, however, have required isolators or pads to prevent the frequency