Broadband, high power, linear beam noise generation and amplification

The generation of noise for use in jamming applications is a matter of concern to component and system designers. Recently, noise generation schemes have been publicized which exhibit various RF bandwidths, depending on the operating frequency. An investigation has been underway at USAECOM to determine methods of generating broadband noise which are applicable throughout the microwave range as well as applicable to high power noise devices. Linear beam traveling-wave tubes with either internal or external feedback were the noise generation schemes studied. A noise bandwidth of 6:1 was achieved with one generation scheme. Measurement techniques and test results including expected efficiency are discussed. Special design and construction considerations are presented for the tube designer.