Voltage controlled ferroelectric lens phased arrays
J.B.L. Rao,D.P. Patel +1 more
- Vol. 3, pp 1624-1627
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TLDR
In this paper, a voltage controlled ferroelectric lens was proposed for phase shift control in the Radant lens, which introduces an analog phase shift rather than a digital phase shift.Abstract:
Phased array antennas can steer transmitted and received signals without mechanically rotating the antenna. Each radiating element of a phased array is normally connected to a phase shifter, which determines the phase of the signal at each element to form a beam at the desired angle. The most commonly used phase shifters are ferrite and diode phase shifters. Phase shifters using ferroelectric materials have been proposed previously. A typical phased array may have several thousand elements and is very expensive. Therefore, reducing the cost and complexity of the phase shifters and the phase shifter controls is an important consideration in the design of phased arrays. The phased array described uniquely incorporates bulk phase shifting, the array does not contain individual phase shifting, using a ferroelectric material along with simpler phase shift control. Bulk phase shifting using diodes has been proposed and developed in the Radant lens. The lens described uses a voltage controlled ferroelectric, which introduces an analog phase shift rather than a digital phase shift as in the Radant lens. The ferroelectric lens has further advantages of smaller lens thickness, higher power handling, simpler beam steering controls, and it uses less power to control the phase shift compared to the Radant lens. Thus, it can potentially lead to low cost phased arrays.read more
Citations
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Tunable dual-band ferroelectric antenna
Vijay K. Varadan,Peng Thian Teo +1 more
TL;DR: In this article, a multilayer tunable ferroelectric antenna assembly that includes two superimposed substrate layers is described. But the antenna is not tuned to a specific frequency.
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TL;DR: In this paper, a family of FE dielectric-tuned antennas and a method for frequency tuning a wireless communications antenna are provided, which comprises: forming a radiator, forming a dielectrics with ferroelectric material proximate to the radiator, applying a voltage to the ferro-electric material; in response to applying the voltage, generating a Dielectric constant, communicating electromagnetic fields at a resonant frequency.
Journal ArticleDOI
Voltage-controlled ferroelectric lens phased arrays
J. Rao,D.P. Patel,V. Krichevsky +2 more
TL;DR: In this paper, a voltage-controlled ferroelectric lens was proposed to reduce the number of phase shifters from (n/spl times/m) to (n+m).
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Beam Steering Transmitarray Using Tunable Frequency Selective Surface With Integrated Ferroelectric Varactors
Mohsen Sazegar,Yuliang Zheng,Christian Kohler,Holger Maune,Mohammad Nikfalazar,Joachim R. Binder,Rolf Jakoby +6 more
TL;DR: In this paper, a tunable frequency selective surface (FSS) with beam steering capability is presented, which is used as a transmit array with a bandpass characteristic in Ku-band.
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A Beam Steering Horn Antenna Using Active Frequency Selective Surface
TL;DR: In this article, an active frequency selective surface (FSS) unit was proposed to achieve beam steering in both E- and H-plane in a range of ±30° at 5.3 GHz with a bandwidth of 180 MHz.
References
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Journal Article
Planar microwave electro-optic phase shifters
Proceedings ArticleDOI
Ceramic phase-shifters for electronically steerable antenna systems
TL;DR: In this paper, a microwave phase shifter using a ferroelectric material for obtaining phase shifts from changes in dc biasing fields was described. And the dielectric properties were measured as a function of dc-biasing fields, frequency, and temperature for a few compositions of barium-strontium titanate material.
Journal ArticleDOI
Barium strontium titanate and non-ferroelectric oxide ceramic composites for use in phased array antennas
TL;DR: In this article, a phase shifting device using Ba1−xSrxTiOO3 (BSTO) ceramics has been demonstrated using a ceramic ferroelectric phase shift device.
Patent
Electrically controlled dielectric panel lens
TL;DR: In this paper, the authors describe the phase shift of a radiated microwave using a dielectric panel in which is imbedded at least one plane network of conductive leads running parallel with the electric field of the incident wave.