TY - GEN
T1 - Semi-active multiple beam arrays
AU - Roederer, Antoine G.
AU - Yarovoy, Alexander G.
N1 - Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.
PY - 2019/5/1
Y1 - 2019/5/1
N2 - The low power efficiency (5-15%) of solid state power amplifiers, working in back-off to guarantee a good linearity, could become the show stopper for some future space and terrestrial communication ventures at Ka-band and above. Semi-active reflector and conformal antennas, using Butler-like matrices between the power amplifiers and the feed elements, were first introduced to directly generate flexible multiple beams most efficiently.For linear and planar arrays, such phase-only control at power amplifier inputs can provide beam zooming or amplitude tapering, but no proper beam steering. The paper discusses and analyses the extension of the semi-active principle to linear and planar arrays, by use of multiport amplifiers with amplitude and phase input control to power the elements most efficiently.Performances and limitations of such systems are analyzed and demonstrated for a few examples.
AB - The low power efficiency (5-15%) of solid state power amplifiers, working in back-off to guarantee a good linearity, could become the show stopper for some future space and terrestrial communication ventures at Ka-band and above. Semi-active reflector and conformal antennas, using Butler-like matrices between the power amplifiers and the feed elements, were first introduced to directly generate flexible multiple beams most efficiently.For linear and planar arrays, such phase-only control at power amplifier inputs can provide beam zooming or amplitude tapering, but no proper beam steering. The paper discusses and analyses the extension of the semi-active principle to linear and planar arrays, by use of multiport amplifiers with amplitude and phase input control to power the elements most efficiently.Performances and limitations of such systems are analyzed and demonstrated for a few examples.
UR - http://www.scopus.com/inward/record.url?scp=85077954811&partnerID=8YFLogxK
U2 - 10.23919/URSI-EMTS.2019.8931469
DO - 10.23919/URSI-EMTS.2019.8931469
M3 - Conference contribution
T3 - 2019 URSI International Symposium on Electromagnetic Theory, EMTS 2019
BT - 2019 URSI International Symposium on Electromagnetic Theory, EMTS 2019
PB - Institute of Electrical and Electronics Engineers (IEEE)
T2 - 2019 URSI International Symposium on Electromagnetic Theory, EMTS 2019
Y2 - 27 May 2019 through 31 May 2019
ER -