Topic
Phased array
About: Phased array is a research topic. Over the lifetime, 19428 publications have been published within this topic receiving 229231 citations. The topic is also known as: Phased Array Radar, PAR.
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Patent•
17 Jun 1998
TL;DR: In this paper, a phased array antenna with stacked-disc radiators embedded in dielectric media is shown to have a rectangular arrangement of unit cells that are disposed on a ground plane.
Abstract: A phased array antenna (10) having stacked-disc radiators embedded in dielectric media. The phased array antenna has a rectangular arrangement of unit cells (19) that are disposed on a ground plane (11). A lower dielectric puck (12) with a high dielectric constant is disposed on the ground plane. An excitable disc (13) is disposed within the perimeter of and on top of the lower dielectric puck. An upper low dielectric constant dielectric puck (16) that has a dielectric constant lower than that of the lower dielectric puck is disposed on the excitable disc. A parasitic disc (17) is disposed within the perimeter of and on top of the upper dielectric puck. Dielectric filler material (26) having a dielectric constant that is lower than that of the lower dielectric puck surrounds the dielectric pucks. A radome (18) is disposed on top of the parasitic disc and the unit cell. Two orthogonal pairs of excitation probes (14) are coupled to the lower excitable disc. The polarization of the phased array antenna may be single linear polarization, dual linear polarization, or circular polarization depending on whether a single pair or two pairs of excitation probes are excited
67 citations
TL;DR: In this paper, a 16-element Q-band transmit/ receive phased array with high receive linearity and low power consumption is presented, which is based on the all-RF architecture with passive phase shifters and a 1:16 Wilkinson network.
Abstract: This paper presents a 16-element Q-band transmit/ receive phased array with high receive linearity and low power consumption The design is based on the all-RF architecture with passive phase shifters and a 1:16 Wilkinson network An input P1dB from -9 to -10 dBm and a noise figure of 10-115 dB at 44-46 GHz is achieved in the receive mode with a power consumption of 095 W In the transmit mode, each channel has an output P1dB of 3-2 dBm and Psat of 6-4 dBm at 44-46 GHz with a power consumption of 116 W The design results in a low root mean square (rms) gain error due to a high-resolution variable gain amplifier in each channel Measurements on multiple channels show near-identical gain and phase response in both the transmit and receive mode due to the use of a symmetrical passive combiner The measured on-chip coupling is <; -40 dB and results in insignificant additional rms and phase error
67 citations
11 Jun 2006
TL;DR: In this paper, an X-band SiGe low-noise amplifier (LNA) for a monolithically integrated phased array transmit/receive (T/R) radar module is presented.
Abstract: This paper presents an X-band silicon-germanium (SiGe) low-noise amplifier (LNA) for a monolithically integrated phased array transmit/receive (T/R) radar module. Implemented in a 200 GHz SiGe BiCMOS technology, the LNA occupies 730 /spl times/ 720 /spl mu/m/sup 2/ (including bondpads), and dissipates 15 mW from a 2.5 V power supply. The circuit exhibits a gain greater than 19 dB from 8.5 to 10.5 GHz, and a mean noise figure (NF) of 1.36 dB across X-band. At 10 GHz, the input 1-dB compression point (IP/sub 1-dB/) and the input third-order intercept point (IIP/sub 3/) are -10.0 dBm and 0.8 dBm, respectively. To our knowledge, this LNA achieves the lowest noise figure of any LNA in Si-based technology at X-band.
67 citations
TL;DR: In this article, a dual-band, Tx/Rx, self-diplexing phased array was designed to cover Tx-Rx satellite communications at K/Ka band with a frequency ratio 1.5:1.
Abstract: A dual-band, Tx/Rx, self-diplexing phased array is presented. The antenna has been designed to cover Tx/Rx satellite communications at K/Ka band with a frequency ratio 1.5:1. To obtain dual-band operations with a single radiating surface, a novel dual-band radiator is adopted and placed in a configuration in which dual-band and single-band elements are interleaved. The proposed configuration reduces the number of radiating elements required by other solutions while avoiding the insurgence of grating lobes. The tightly packed arrangement of the elements poses many integration issues, which are solved with a novel integration technique. The array elements are optimized to scan the beam in excess of 50° in both bands. A subarray with 49 Rx elements and 105 Tx elements was built and measured confirming the results obtained in simulations.
67 citations
TL;DR: In this article, a real-coded GA was proposed for the optimal design of a dual-beam linear array antenna with phase only control, where the problem is to find a common amplitude distribution with minimum dynamic range ratio (DRR) that will generate a pencil beam with zero phases and a flat-top beam with continuously controllable phases of an analog phase shifter.
Abstract: In this letter, we propose a real-coded genetic algorithm (GA) for optimal design of reconfigurable dual-beam linear array antennas with phase only control. The problem is to find a common amplitude distribution with minimum dynamic range ratio (DRR) that will generate a pencil beam with zero phases and a flat-top beam with continuously controllable phases of an analog phase shifter. Results are also shown for the same design without minimizing dynamic range ratio (amax /amin) of excitation amplitude
67 citations