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Aerospace and Electronics Conference (NAECON), 2012 IEEE National

Date 25-27 July 2012

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Displaying Results 1 - 25 of 60
  • Chairman's introduction

    Publication Year: 2012 , Page(s): 1 - 31
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    Freely Available from IEEE
  • Committee

    Publication Year: 2012 , Page(s): 1
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    Freely Available from IEEE
  • [Keynotes - 2 presentations]

    Publication Year: 2012 , Page(s): 1 - 69
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    Freely Available from IEEE
  • RF sensing research at AFRL sensors directorate outdoor radar range

    Publication Year: 2012 , Page(s): 1 - 31
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (4353 KB) |  | HTML iconHTML  

    Presents the collection of slides covering the following topics: RF sensing complexity; AFRL sensor directorate outdoor radar range; radar antenna; and air force system. View full abstract»

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  • [Tutorials]

    Publication Year: 2012 , Page(s): 1 - 381
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (23761 KB)  

    Presents a collection of slides covering the following topics: CS-based receiver prototypes; proof of concept; real-time signal processing; EW problems; digital receivers. View full abstract»

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  • Call for papers - NAECON 2013

    Publication Year: 2012 , Page(s): 1 - 2
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  • Table of contents

    Publication Year: 2012 , Page(s): 1 - 6
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  • Author index

    Publication Year: 2012 , Page(s): 1 - 4
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    Freely Available from IEEE
  • [Copyright notice]

    Publication Year: 2012 , Page(s): 1
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    Freely Available from IEEE
  • Graphite-based material development for reconfigurable antennas

    Publication Year: 2012 , Page(s): 1 - 7
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1160 KB) |  | HTML iconHTML  

    New antenna material functionalities are required for reconfigurable antenna technologies. For these applications, RF circuit materials which are innately reconfigurable could provide increased functionality without added complexity. We have investigated two such materials: sulfuric acid-intercalated graphite, a tunable-impedance conductor; and a graphene oxide-metal nanoparticle composite, a semi... View full abstract»

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  • Microwave characterization of graphite and intercalated graphite as an antenna element

    Publication Year: 2012 , Page(s): 8 - 10
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (993 KB) |  | HTML iconHTML  

    Intercalated graphite (IG) possesses uniquely tunable DC conductivity using electrochemically intercalated sulfuric acid as the intercalant, giving it the potential to add significant functionality to antenna elements and other microwave circuit elements, but its microwave and antenna properties have not previously been measured. In this research, graphite and (IG) are characterized for their micr... View full abstract»

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  • Wideband phased array calibration method for digital beamforming

    Publication Year: 2012 , Page(s): 11 - 17
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (2983 KB) |  | HTML iconHTML  

    Previous study has used chirp signals to characterize the RF response of a multi-channel RF receiver [1]. The results showed a significant channel imbalance. After applying a time-reversal filter, the channel imbalance was remedied and both phase and amplitude were realigned among the channels. In the present study, the RF response of a complete multichannel receiver with antenna was characterized... View full abstract»

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  • Broadband THz filters for THz sensing devices

    Publication Year: 2012 , Page(s): 18 - 19
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (486 KB) |  | HTML iconHTML  

    We propose a broadband filter using multi-layered frequency selective surfaces (FSS) for terahertz (THz) sensing devices. These types of filter windows are required to be placed in front of THz sensors to increase signal-to-noise ratio and reduce sensor sensitivity to mid IR and visible light. The FSS filter is simulated using polyethylene dielectric layers with fan shaped metal slots. Simulations... View full abstract»

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  • Finite-element simulation and design of a high-extinction-ratio THz wire-grid polarizer

    Publication Year: 2012 , Page(s): 20 - 23
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (630 KB) |  | HTML iconHTML  

    A THz wire grid polarizer was simulated, designed, and demonstrated. The polarizer consists of 40-micron periodic aluminum strips mounted on a polycarbonate substrate. Finite element numerical simulations were performed from 100 GHz to 550 GHz. The results of these simulations predicted that the transmission in perpendicular polarization would be much higher than that predicted by geometric optics... View full abstract»

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  • Dual-band, Wide-incident-angle absorber for far-IR and THz frequencies

    Publication Year: 2012 , Page(s): 24 - 25
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (575 KB) |  | HTML iconHTML  

    We present an electrically thin, dual-band, perfect absorber design that can be scaled to operate in the far infrared (FIR) or THz band. A dual-polarization frequency selective surface (FSS) consisting of crossed dipoles is modified using additional parasitic tip metallizations to achieve dual-band performance. The conducting FSS layer is placed on a silicon carbide (SiC) substrate backed by a met... View full abstract»

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  • Wideband active matching of terahertz envelope detectors

    Publication Year: 2012 , Page(s): 26 - 27
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (507 KB) |  | HTML iconHTML  

    Impedance matching of zero-bias millimeter-wave/THz diodes is examined in the context of THz communications receivers. Specifically, we present an active matching circuit that can realize Gb/s bandwidth performance for a 230GHz carrier frequency envelope detector. The active circuit consists of two transistor stages preceded by a 3rd order L/C matching network. Using a cascode stage fol... View full abstract»

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  • A new approach to on-chip probing in the MM-wave to THz range

    Publication Year: 2012 , Page(s): 28 - 30
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (895 KB) |  | HTML iconHTML  

    One of the bigger obstacles in the development of THz devices and integrated circuits is their electrical characterization in the upper-millimeter to terahertz range above 100 GHz. Today's technology is mainly based on metal-to-metal, dc-coupled contact probes. This technology is, however, expensive and fragile, and is difficult to scale to higher frequencies. This paper concerns contact-free prob... View full abstract»

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  • Increased output power 300 GHz oscillator based on linear superposition

    Publication Year: 2012 , Page(s): 31 - 33
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (475 KB) |  | HTML iconHTML  

    Harmonic oscillators have generally demonstrated lower phase noise, higher frequencies, and less DC power consumption as compared to fundamental oscillators. However, oscillator designs using simple harmonic techniques have persistent issues with low output power and instability. Herewith, we propose an oscillator design at 300GHz with common-source amplifiers to stabilize signals in voltage-contr... View full abstract»

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  • Non-contact THz probes for on-chip device and IC characterization

    Publication Year: 2012 , Page(s): 34 - 35
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (851 KB) |  | HTML iconHTML  

    We propose a contactless characterization approach for evaluating semiconductor devices and integrated circuits that operate in the THz regime (0.1-3 THz). The non-contact probe consists of on-chip receiving and transmitting THz antennas in a co-planar waveguide environment. Commercially available frequency extension modules with horn antennas are used in conjunction with microwave vector network ... View full abstract»

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  • THz imaging performance of a broadband 80×64 focal plane array

    Publication Year: 2012 , Page(s): 36 - 37
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1010 KB) |  | HTML iconHTML  

    We present the performance characterization of a large-format, sub-millimeter resolution, real-time focal plane array (FPA) sensor for THz imaging. With the aid of in-house hybrid electromagnetic modeling tools, the FPA is optimized for diffraction limited image resolution and conjugate impedance matching for highest THz sensitivity. The sensor operates in the 0.6-1.2 THz band with 5 frames-per-se... View full abstract»

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  • Broadband THz filters for THz sensing devices

    Publication Year: 2012 , Page(s): 38 - 39
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (485 KB) |  | HTML iconHTML  

    We propose a broadband filter using multi-layered frequency selective surfaces (FSS) for terahertz (THz) sensing devices. These types of filter windows are required to be placed in front of THz sensors to increase signal-to-noise ratio and reduce sensor sensitivity to mid IR and visible light. The FSS filter is simulated using polyethylene dielectric layers with fan shaped metal slots. Simulations... View full abstract»

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  • Language translation of web-based content

    Publication Year: 2012 , Page(s): 40 - 45
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (584 KB) |  | HTML iconHTML  

    Machine Translation (MT) software today provides adequate conversion of foreign languages to one's native tongue; however, dialects, slang, and character conversion errors result in partially successful translations. For an accurate translation, a native speaker is often required to correct the translation by using sentence structure and word use cues to capture the true meaning. MT character conv... View full abstract»

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  • Web-based geospatial information extraction

    Publication Year: 2012 , Page(s): 46 - 50
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (468 KB) |  | HTML iconHTML  

    The quantity of information publicly available on the World Wide Web today is enormous and continuously growing. Individual tools available for information retrieval and data mining are capable of extracting data based on search criteria but place a cognitive burden on the user to sift through the search results to find the information of interest. The dynamic nature of web-based information requi... View full abstract»

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  • A trustworthiness evaluation framework for distributed networks

    Publication Year: 2012 , Page(s): 51 - 56
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1212 KB) |  | HTML iconHTML  

    This research examines the utility of Markov switching models in assessing trust and trustworthiness of a heterogeneous network, e.g. distributed sensor networks. As an unsupervised machine learning method, hidden Markov models (HMM) is independent of the assumptions commonly used in modeling trust in complex systems. A relevant time series that switches regimes from trusted to untrusted periods o... View full abstract»

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  • Abduction's role in reverse engineering software

    Publication Year: 2012 , Page(s): 57 - 62
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (498 KB) |  | HTML iconHTML  

    As software has become an integral part of most systems, so too have cyber threats become an expected attack vector. This has made the task of reverse engineering software an increasingly necessary and critical skill. Software systems are regarded as the most complex of human designed technologies. Software can be difficult to understand when the source code is provided, but a reverse engineer is ... View full abstract»

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