Abstract:In a phased array antenna, the phase shifters (or T/R modules in an active aperture phased array) with their beam-steering control circuitry along with the feed network account for the major hardware cost. This paper presents two antenna array configurations that use simpler feed, simpler phase-shifting and simpler beam-steering control circuitry for realizing low-cost phased arrays. Both are lens configurations. The first one uses a Radant lens, which provides a medium that is loaded with diodes and provides … Show more
“…Usage of ferroelectrics in phased arrays has been presented in [21,17]. Three possible configurations: two traveling wave types and another lens type antenna, have been discussed.…”
Section: B Reconfiguration Mechanisms By Materials Changesmentioning
Reconfigurable Antennas: the State of the ArtThe paper provides an overview of the state of the art in the area of reconfigurable antennas. This emerging area has been rapidly developing in the recent years. This article brings a comprehensive summary of the high quality applied and fundamental research contributions in the above-mentioned field. A broad spectrum of topics is covered, reflecting the areas in which Institute of Radioelectronics's expertise is recognized worldwide.
“…Usage of ferroelectrics in phased arrays has been presented in [21,17]. Three possible configurations: two traveling wave types and another lens type antenna, have been discussed.…”
Section: B Reconfiguration Mechanisms By Materials Changesmentioning
Reconfigurable Antennas: the State of the ArtThe paper provides an overview of the state of the art in the area of reconfigurable antennas. This emerging area has been rapidly developing in the recent years. This article brings a comprehensive summary of the high quality applied and fundamental research contributions in the above-mentioned field. A broad spectrum of topics is covered, reflecting the areas in which Institute of Radioelectronics's expertise is recognized worldwide.
“…An important consideration is that the tangential magnetic field is not continuous in the regions where electric currents flow across the switching elements. As a result of this discontinuity, the second integral equation of the system contains the electric currents (4) where is the complete system of the Floquet modes corresponding to the "large" cell;…”
Section: B Mathematical Model Of a Single Layer And Cascading Proceduresmentioning
A quasi-optical beam steering multilayer lens with scanning in -plane is analyzed. A full-wave mathematical model is developed to predict the scanning characteristics of the lens. The model is used to optimize the performance of a three-bit beam steering lens. It is demonstrated that the calculated conversion coefficients for the optimized lens are better than 2 1 dB in the frequency band from 27.5 to 32.5 GHz for transmission elevation angles up to 28 . A two-bit lens that corrects the phase front at the aperture of a short -plane sectoral horn has been designed, fabricated and tested to verify the model. Measured radiation pattern of the -plane sectoral horn with correcting lens agrees well with the predictions based on the model.
“…Rao, et al, [30] described work on a hybrid technique for achieving row/column steering. This is an antenna that uses an array of columns of slotted waveguides having one phase shifter per column in order to steer the beam in azimuth +60".…”
Section: Low Cost Hybrid Row/column Scanned Array and The Radant Lensmentioning
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