Solid State Devices

New solid state devices were developed to meet the stringent requirements of the L-4 system. Since the intermodulation distortion and noise are additive over the thousands of miles of system, low noise figure and very low intermodulation distortion limits are placed on the transistors. A low capacitance surge protection cliode was developed to provide secondary surge protection for the repeater input. A multiple low capacitance diode was developed as an 18 MHz modulator in the terminal; four diodes were developed for the terminal.