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A new group delay equalizer, operating at microwave frequencies, is presented here. It consists in an active transmission path which includes three amplifier stages. The middle stage has an all-pass transfer function when a feedback branch is placed between input and output. The feedback branch is an external stop-band cavity which produces the desirable amount of group delay. The amplifier stages are carried out by using GaAs MMIC technology, while the external cavity consists in a dielectric resonator coupled to a microstrip line. A 285 ns group delay is measured.
ING-INF/01 Elettronica
ING-INF/01 Elettronica
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