33results about How to "Wide gain bandwidth" patented technology

An optical amplifier system is disclosed comprising a discrete amplifier system and a distributed amplifier system. The discrete amplifier system receives optical signals and amplifies the optical signals having wavelengths in a target wavelength band. The target wavelength band has a bandwidth of at least 80 nm. The distributed amplifier system amplifies the optical signals having wavelengths in a longer wavelength band of the target wavelength band, a shorter wavelength band of the target wavelength band, or both.

The invention discloses a reflection array radiation unit, which belongs to the technical field of antennas. It includes a dielectric substrate and a metal pattern layer printed on one side of the dielectric substrate; the metal pattern layer adopts a multi-ring nested structure, including multiple phase factor adjustment rings and several phase compensation rings located on the periphery of the phase factor adjustment ring. The single-layer printing structure reduces the process difficulty of multi-layer printing technology, reduces the dielectric loss and reduces the processing cost. Compared with the traditional unit, its phase compensation ability is increased by 4-6 times, and the traditional reflection array The focal-diameter ratio is reduced to 0.5 or even lower; the structural size of each reflectarray unit can be optimized in the entire working frequency band, so that its phase can be compensated on demand, thereby expanding the gain bandwidth of the reflectarray antenna. The invention also discloses a planar reflectarray antenna composed of the above-mentioned reflectarray radiating unit.