Journal ArticleDOI
Beamformer architectures for active phased-array radar antennas
A.K. Agrawal,E.L. Holzman +1 more
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TLDR
Beamformer architectures for narrow and wide bandwidth arrays, including the choice of applying an amplitude taper in the T/R module or beamformer network are discussed and Beamformer architectures that increase antenna reliability are presented.Abstract:
In active phased-array antennas, the transmit and receive functions are distributed at the antenna aperture using transmit and receive (T/R) modules. The use of T/R modules provides a significant improvement in antenna performance and flexibility in the choice of array architectures. We present a review of various beamformer architectures for active phased-array antennas. This review is limited to corporate-fed active phased-array antennas for radar applications. Beamformer architectures for narrow and wide bandwidth arrays, including the choice of applying an amplitude taper in the T/R module or beamformer network are discussed. Beamformer architectures that increase antenna reliability are also presented.read more
Citations
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Patent
Beamforming rf circuit and applications thereof
TL;DR: In this article, a beamforming radio frequency (RF) circuit includes a plurality of antennas, an adjust module, and a multiplicity of amplifiers, and the adjust module is operably coupled to interrelate coordinates of a signal with the plurality of adjusted signal components.
Journal ArticleDOI
An X- and K u -Band 8-Element Phased-Array Receiver in 0.18- $\mu{\hbox{m}}$ SiGe BiCMOS Technology
Kwang-Jin Koh,Gabriel M. Rebeiz +1 more
TL;DR: This paper demonstrates the first demonstration of an All-RF phased array on a silicon chip with very low RMS phase and gain errors at 6-18 GHz, and can operate instantaneously at any center frequency and with a wide bandwidth.
Journal ArticleDOI
Benefits of Digital Phased Array Radars
Salvador H. Talisa,Kenneth W. O'Haver,Thomas M. Comberiate,Matthew D. Sharp,Oscar F. Somerlock +4 more
TL;DR: An overview is given of the radar benefits of digital arrays in comparison with conventional phased arrays as well as subarray- and element-level digital arrays as the newest generation architecture for radar and other electronic systems.
Journal ArticleDOI
Element Failure Correction for a Large Monopulse Phased Array Antenna With Active Amplitude Weighting
TL;DR: In this paper, a method is introduced to synthesize low sidelobe patterns for planar array antennas with a periodic element arrangement, which makes use of the property that an inverse Fourier transform relationship exists between the array factor and the element excitations.
Journal ArticleDOI
Development of frequency diverse array radar technology: a review
TL;DR: This study presents a review on the development of FDA technology in radar and navigation applications and focuses the research on getting range-angle uncoupled beam patterns along with diverse hybrid cognitive FDA design, available in the literature, for improved radar performance.
References
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Book
Introduction to Radar Systems
TL;DR: This chapter discusses Radar Equation, MTI and Pulse Doppler Radar, and Information from Radar Signals, as well as Radar Antenna, Radar Transmitters and Radar Receiver.
Journal ArticleDOI
G/T and noise figure of active array antennas
TL;DR: In this article, the effects of the beamforming network on the overall noise figure of a multichannel active array antenna were studied and the dependence of the noise figure on various losses, and the difference between a resistive and non-resistive taper in the combining network.
Journal ArticleDOI
Antenna array architecture
TL;DR: An abbreviated view of the topics included in modern array architecture is presented in this article, where the broad subject of architecture includes all the electromagnetic, thermal and mechanical aspects that need to be addressed by the array design team.
Journal ArticleDOI
Active phased array design for high reliability
A.K. Agrawal,E.L. Holzman +1 more
TL;DR: In this article, the authors consider fault-tolerance in the design of the antenna architecture, so that replacement of failed components can be avoided for an extended period of time, and show the effect of random, single, and clustered element failures on the peak sidelobe level of a low sidelobe antenna aperture.
Journal ArticleDOI
Design and performance of octave S/C band MMIC T/R modules for multi-function phased arrays
J.J. Komiak,A.K. Agrawal +1 more
TL;DR: In this article, a complex wideband transmit/receive module that achieves performance levels superior to any MMIC module is described, achieving a power output of 21 W at S-band and 19 W at C-band, a noise figure of 3.9 to 5.0 dB, 30 to 38 dB of receive gain, 25 to 26 dBm output IP/sub 3/, 40 dB of gain control in 256 steps.