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This paper describes a new form of the wideband, wide scan notch array antenna which provides some distinct advantages. The Planar-Fed Folded Notch (PFFN) Array described herein differs from more traditional printed circuit board (PCB) and metal embodiments of the notch radiator array. PFFN array designs employ planar feeds that are incorporated on a single, common multi-layer PCB that is parallel...
Today's communication systems demand both increased performance and reduced size. A frequency reconfigurable antenna provides the capability for the antenna to operate in only the desired frequency range while rejecting neighboring ones. This reduces interference which will consequently increase S/N ratio, thus channel capacity or power efficiency. An antenna which covers multiple bands provides an...
In this paper we consider the development of wideband direction finder for VHF/UHF frequency band, taking into account the number of antenna elements in the antenna array, and the number of RF channels in the wideband receivers. Two variants of the wideband direction finder have been considered. In the first case, the number of RF channels is equal to number of antenna elements in the antenna array...
This paper describes technology development efforts in support of phased-array digital beamforming at Applied Radar, Inc. The development efforts are aimed at increasing the bandwidth and dynamic range and enabling real-time throughput of multi-channel array data. This digital beamforming approach enables improved calibration, increased coverage through multiple receive beams, and adaptive processing...
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