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Microwave variable waveguide attenuator

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4 Author(s)
Fabeni, P. ; “Nello Carrara” Institute of Applied Physics, CNR Florence Research Area, Via Madonna del Piano 10, Sesto Fiorentino, Firenze 50019, Italy ; Mugnai, D. ; Pazzi, G.P. ; Ranfagni, A.

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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 Ku-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.

Published in:

Review of Scientific Instruments  (Volume:79 ,  Issue: 6 )