A novel array antenna for MSAT applications

Bodnar, D.; Rainer, Benjamin; Rahmat‐Samii, Y.

doi:10.1109/25.61334

Cited by 13 publications

(6 citation statements)

References 5 publications

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“…Design and beamforming of the phased arrays with mobile platforms such as airborne [2], shipboard [4], [5] or vehicular platforms [7]- [9] are more delicate and challenging compared to the stationary arrays.…”

Section: Introductionmentioning

confidence: 99%

Fast Beamforming for Mobile Satellite Receiver Phased Arrays: Theory and Experiment

Fakharzadeh

Jamali

Mousavi³

et al. 2009

IEEE Trans. Antennas Propagat.

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The purpose of this paper is to present a robust and fast beamforming algorithm for the low-cost mobile phased array antennas. The proposed beamforming algorithm uses a sequentially perturbation gradient estimation method to update the control voltages of the phase shifters, with the objective of maximizing the received power by the array. This algorithm does not require either the knowledge of phase shifter characteristics or signal Direction-of-Arrival. Moreover, in this paper, the algorithm parameters are derived for the stationary and mobile platform configurations. For the stationary array, it is shown how the proper selection of the beamforming parameters limits the noise effects and increases the array output power. For the mobile array, a condition for the fast convergence is derived and the advantage of using nonuniform step size to update the control voltages is illustrated. When phase shifters suffer from the imbalanced insertion loss the proposed beamforming technique perturbs the phase-conjugate condition to increase the total received power. This algorithm has been implemented with the low-cost microwave components and applied to a Ku-band phased array antenna with 34 sub-arrays. The experimental results verify the broadband performance, and the fast convergence of the algorithm for different platform maneuvers.Index Terms-Adaptive array, beamforming, mobile phased array antenna, satellite communications, smart antenna.

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Section: Introductionmentioning

confidence: 99%

Fast Beamforming for Mobile Satellite Receiver Phased Arrays: Theory and Experiment

Fakharzadeh

Jamali

Mousavi³

et al. 2009

IEEE Trans. Antennas Propagat.

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“…The mobile satellite experiment studied in [111] uses a number of antennas mounted on a vehicle. A beam is electronically steered in the direction of a satellite using phase shifters.…”

Section: ) Array On Satellitesmentioning

confidence: 99%

“…An analysis of the slotted leaky waveguide array system can be found in [190]- [192]. These and other array design activities [109], [111], [193], [194] demonstrate the suitability of antenna arrays for mobile communications systems from an antenna-design point of view.…”

Section: A Developments Of Antenna Elements and Arraysmentioning

confidence: 99%

“…For example, in a system where the shape of the antenna pattern remains fixed during the steering process-such as a mechanically steered array, where the boresight direction of the array is pointed toward the satellite, as well as an electronically steered array, where only phase is adjusted to steer the beam-the accuracy required in the direction of the satellite is on the order of a half beamwidth, as any higher error would put the satellite out of the main lobe. It is argued in [111] that the maximum acquisition time permitted for an electronically steered array is 10 s and the time required from acquisition to optimum pointing is less than 2 s. A tracking system needs to take into account the maneuvering of vehicles resulting in velocities on the order of 45 /s and accelerations up to 45 /s [111], as well the convergence speed of the algorithm used when an adaptive scheme is employed to adjust the array weights [154].…”

Section: B Tracking Systemmentioning

confidence: 99%

“…Some other developments reported in the literature related to systems employing adaptive antennas include a multiway power divider for a planar slotted waveguide array suitable for vehicles to communicate with direct broadcasting satellites [190], a digital demultiplexer for an adaptive satellite array [110], a Ku-band solid-state power amplifier for European satellite systems, and a low-cost feed system suitable for vehicle antennas, which does not require the use of phase shifters at each element [111].…”

Section: Experimental Systemsmentioning

confidence: 99%

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