In this article, a transmission line system for the propagation of millimeter-wave radiation is presented. The full includes TE11-to-TE01 mode converter, waveguide tapers, miter bends, and many straight sections. design each these components described, optimized simulation results are given. converter shows greater than 96% conversion efficiency that can be achieved over 2% bandwidth at ${W}$ -...

In this paper, a new technique of signal detection has been proposed for detecting the orthogonal frequencydivision multiplexing (OFDM) signals in the presence of nonlinear distortion. There are several advantages of OFDM communication systems. However, one of the existing problems is considered as the nonlinear distortion generated by high power amplifier at the transmitter end due to the larg...

We present a quantum mechanical model for four-wave mixing Josephson traveling-wave parametric amplifier including substrate losses and associated thermal fluctuations. Under the assumption of strong undepleted classical pump tone, we derive an analytic solution bosonic annihilation operator weak signal photon field using temporal equations motion in reference timeframe, chromatic dispersion. F...

A bunch compression scheme designed to obtain high efficiency in relativistic traveling-wave tube (TWT) amplifiers is reported. Bunch compression is achieved by making the bunches stay in more positive slopes of the axial electric field in the amplifier. The resulting momentum gradient across the bunch tends to oppose space-charge spreading and helps to sustain short bunch lengths for long dist...

In this paper, a new technique of signal detection has been proposed for detecting the orthogonal frequency-division multiplexing (OFDM) signal in the presence of nonlinear distortion. There are several advantages of OFDM communications system. However, one of the existing problems is remain considered as the nonlinear distortion generated by high-power-amplifier at the transmitter end due to t...

Traveling Wave Tubes (TWTs) are microwave and millimeter wave amplifiers used in radar, satellite communications, and electronic countermeasure applications. On a satellite, the TWT provides the final communications signal boost before transmitting the signal back to earth. In electronic countermeasures, TWTs boost signals that are sent out to deny detection by an enemy radar. The TWT, as with ...

The DARTWARS project has the goal of developing high-performing innovative traveling wave parametric amplifiers with high gain, large bandwidth, saturation power, and nearly quantum-limited noise. target frequency region for its applications is 5–10 GHz, where expected noise temperature below 600 mK. development follows two different approaches, one based on Josephson junctions kinetic inductan...