Title :
Compensating Digital Attenuator Differential Phase Shift
Author :
Ciccognani, Walter ; Giannini, Franco ; Limiti, Ernesto ; Longhi, Patricke
Author_Institution :
Dept. of Electron. Eng., Univ. Roma Tor Vergata, Rome
Abstract :
Controlled attenuators are key elements in a phased array´s beam forming network and generally in all those systems requiring accurate control of the RF signal´s amplitude and phase. Therefore the realisation of constant- phase digital attenuators is essential to obtain advanced system performance. A reactive element has been inserted in the traditional T topology digital attenuator to obtain equiphase condition and design equations have been inferred for optimum design. A MMIC X-Band 5-BIT constant-phase attenuator system has been designed and realised as a test vehicle for the proposed methodology.
Keywords :
MMIC phase shifters; attenuators; digital integrated circuits; phase control; MMIC X-Band 5-bit constant-phase attenuator system; RF signal amplitude control; RF signal phase control; controlled attenuators; design equations; digital attenuator differential phase shift; equiphase condition; frequency 8 GHz to 12 GHz; phased array´s beam forming network; reactive element; test vehicle; traditional T topology digital attenuator; Attenuators; Control systems; Equations; MMICs; Network topology; Phased arrays; RF signals; Radio frequency; System performance; System testing; Constant phase digital attenuator; MMIC; Phased Array; X-Band;
Conference_Titel :
Microwave Techniques, 2008. COMITE 2008. 14th Conference on
Conference_Location :
Prague
Print_ISBN :
978-1-4244-2137-4
Electronic_ISBN :
978-1-4244-2138-1
DOI :
10.1109/COMITE.2008.4569947
