Signal transmitter

A signal transmitter, comprising:

• a signal splitting module, comprising M output interfaces, wherein the signal splitting module is configured to split a signal into N sub-signals, and wherein the signal splitting module is further configured to output the N sub-signals through N of the M output interfaces, wherein M and N are integers, M≥2, N≥1, and M≥N;
• an integrated array traveling-wave tube, comprising M radio frequency channels, wherein the M radio frequency channels correspond in a one-to-one relationship to the M output interfaces, wherein the integrated array traveling-wave tube is configured to amplify a sub-signal that is output from a corresponding output interface for each of the M radio frequency channels, and wherein each of the M radio frequency channels is openable and closeable;
• a power supply module, configured to supply power to the integrated array traveling-wave tube;
• and
• at least one transmit antenna, configured to send a signal obtained from the integrated array traveling-wave tube.