This paper proposes a uniform linear 3×1 traveling-wave antenna array (ULTWAA) for millimetre applications in the sub-THz band. The designed array allows a continuous beam orientation of ±46.1° in the E-plane. A small quarter-wave line added to the ends of the antenna...
The traveling-wave tube is a critical subsystem for satellite data transmission. Its role in the history of wireless communications and in the space conquest is significant, but largely ignored, even though the device remains widely used nowadays. This paper presents, albeit non-exhaustively, circums...
The phase relationship between the elements of an LPDA is crucial for creating a traveling wave along the array, which ensures that the radiation is directed in the desired direction and contributes to the antenna's broad frequency range performance....
General Characteristics of Traveling-Wave Antennas, Antenna Theory - Part 2. Collin, R. E. & Zucker, F. J. (eds). Ch. 19 (McGraw-Hill, 1969). Elachi, C. Waves in active and passive periodic structures: a review. Proc. IEEE 64, 1666–1698 (1976). Article ADS Google Scholar ...
A travelling-wave long sinusoidal slot in the narrow face of a millimeter-wave (Ka-Band) rectangular waveguide is investigated. To the best of our knowledge, a slot of this shape is applied to the narrow face of a rectangular waveguide for the first time at this frequency range. The analyt...
During each shot, a burst of traveling inertial Alfvén waves is launched at a fixed moment in the discharge sequence by our Sigma antenna at a frequency of 1.177 MHz. The Alfvén wave fields B⊥ and E⊥, perpendicular to B0, are recorded using Elsässer probes38 at a distance of \...
Over the years, there have been several RF amplification technologies used in radar systems, such as Silicon Bipolar, Silicon LDMOS, Gallium Arsenide (GaAs) and tube base products like traveling wave tube technology. Most recently, Gallium Nitride (GaN) HEMT has been the RF and microwave power ...
A surface wave antenna is in general a slow wave structure. Another traveling wave antenna is the leaky-wave antenna, it’s defined as “an antenna that couples power in small increments per unit length, either continuously or discretely, from traveling wave structure to free-space, Most of ...
A traveling wave, linearized, modulator device includes: an optical waveguide disposed on a substrate and consisting of an input-output portion, a terminal portion and a plurality of arms disposed bet
The antenna diversity system for mobile reception of VHF and UHF waves has a plurality of antennae; an antenna distributor connected to each of the antennae to receive antenna signals from the antenna