title: Microwave variable waveguide attenuator.
abstract: A new type of cutoff attenuator is presented. The attenuator works in the X-band in conditions of almost perfect matching. This means that the phase of the wave, which propagates inside the guide, does not suffer sensible variation in the passage between X- and K(u)-bands. Moreover, the attenuator works directly in the X-band, avoiding the passage between waveguide and cable, thus eliminating spurious effects due to this (double) passage. Experimental results of attenuation and dephasing using a prototype are also presented.
authors.affiliation: Nello Carrara Institute of Applied Physics, CNR Florence Research Area, Via Madonna del Piano 10, Sesto Fiorentino, Firenze, Italy.
authors.forename: P
authors.initials: P
authors.lastname: Fabeni
authors.forename: D
authors.initials: D
authors.lastname: Mugnai
authors.forename: G P
authors.initials: GP
authors.lastname: Pazzi
authors.forename: A
authors.initials: A
authors.lastname: Ranfagni