scispace - formally typeset
Search or ask a question
Institution

Raytheon

CompanyWaltham, Massachusetts, United States
About: Raytheon is a company organization based out in Waltham, Massachusetts, United States. It is known for research contribution in the topics: Signal & Antenna (radio). The organization has 15290 authors who have published 18973 publications receiving 300052 citations.
Topics: Signal, Antenna (radio), Radar, Turbine, Amplifier


Papers
More filters
Journal ArticleDOI
Robert A. Pucel1, D.J. Masse1, R. Bera1
TL;DR: In this article, a theoretical analysis and experimental verification of the signal properties of the GaAs MESFET mixer is presented, and experimental techniques for evaluating some of the mixer parameters are described.
Abstract: A theoretical analysis and experimental verification of the signal properties of the GaAs MESFET mixer are presented. Experimental techniques for evaluating some of the mixer parameters are described. Experiments performed on GaAs MESFET mixers at X band show that good noise performance and large dynamic range can be achieved with conversion gain. A conversion gain over 6 dB is measured at 7.8 GHz. Noise figures as low as 7.4 dB and output third-order intermodulation intercepts of +18 dBm have heen obtained at 8 GHz with a balanced MESFET mixer.

108 citations

Patent
20 Mar 1997
TL;DR: In this paper, a chip scale package that enables any chip with peripheral bond pads to be converted to an area array chip-scale package suitable for chip-on-board assembly is presented.
Abstract: Methods of producing a chip scale package that enables any chip with peripheral bond pads to be converted to an area array chip scale package suitable for chip on board assembly. The present invention produces the equivalent of a flip chip die when a chip supplier does not provide one. Processing is performed that provides thin film metal interconnections between the chip bond pads and area array bond pads on the bottom of the package. High reliability thin film metal interconnections are thus provided that connect the bond pads of the chip to the area array bond pads to permit external connection to the chip.

108 citations

Journal ArticleDOI
TL;DR: In this paper, a mathematical dynamic model is derived for compliant, constant-force compression mechanisms, based on the pseudo-rigid-body model simplification of the device, which allows every configuration to be represented by the same model, so a separate treatment is not required for each configuration.

108 citations

Journal ArticleDOI
TL;DR: Several known results from the quantum information literature are leveraged to demonstrate that the channel polarization effect occurs for channels with classical inputs and quantum outputs, and linear polar codes are constructed based on this effect, and the encoding complexity is O(NlogN), where N is the blocklength of the code.
Abstract: Holevo, Schumacher, and Westmoreland's coding theorem guarantees the existence of codes that are capacity-achieving for the task of sending classical data over a channel with classical inputs and quantum outputs. Although they demonstrated the existence of such codes, their proof does not provide an explicit construction of codes for this task. The aim of the present paper is to fill this gap by constructing near-explicit "polar" codes that are capacity-achieving. The codes exploit the channel polarization phenomenon observed by Arikan for the case of classical channels. Channel polarization is an effect in which one can synthesize a set of channels, by "channel combining" and "channel splitting," in which a fraction of the synthesized channels are perfect for data transmission while the other fraction are completely useless for data transmission, with the good fraction equal to the capacity of the channel. The channel polarization effect then leads to a simple scheme for data transmission: send the information bits through the perfect channels and "frozen" bits through the useless ones. The main technical contributions of the present paper are threefold. First, we leverage several known results from the quantum information literature to demonstrate that the channel polarization effect occurs for channels with classical inputs and quantum outputs. We then construct linear polar codes based on this effect, and the encoding complexity is O(N log N), where N is the blocklength of the code. We also demonstrate that a quantum successive cancellation decoder works well, in the sense that the word error rate decays exponentially with the blocklength of the code. For this last result, we exploit Sen's recent "non-commutative union bound" that holds for a sequence of projectors applied to a quantum state.

108 citations

Journal ArticleDOI
TL;DR: This attempt at circuit level single event effects (SEE) hardening of SiGe HBT logic provides the first reported indication of the level of sensitivity in this important technology.
Abstract: This attempt at circuit level single event effects (SEE) hardening of SiGe HBT logic provides the first reported indication of the level of sensitivity in this important technology, Characterization over data rate up to 3 Gbps and over a broad range of heavy ion LETs provides important clues to upset mechanisms and implications for upset rate predictions. We augment ion test data with pulsed laser SEE testing to indicate the sensitive targets within the circuit and to provide insights into the upset mechanism(s),.

108 citations


Authors

Showing all 15293 results

NameH-indexPapersCitations
Peter J. Kahrilas10958646064
Edward J. Wollack104732102070
Duong Nguyen9867447332
Miroslav Krstic9595542886
Steven L. Suib8986234189
Gabriel M. Rebeiz8780632443
Charles W. Engelbracht8321028137
Paul A. Grayburn7739726880
Eric J. Huang7220122172
Thomas F. Eck7215032965
David M. Margolis7022717314
David W. T. Griffith6528814232
Gerhard Klimeck6568518447
Nickolay A. Krotkov6321911250
Olaf Stüve6329014268
Network Information
Related Institutions (5)
United States Naval Research Laboratory
45.4K papers, 1.5M citations

86% related

Bell Labs
59.8K papers, 3.1M citations

83% related

Samsung
163.6K papers, 2M citations

83% related

Georgia Institute of Technology
119K papers, 4.6M citations

83% related

Hewlett-Packard
59.8K papers, 1.4M citations

82% related

Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
20232
20228
2021265
2020655
2019579
2018457