Author: Joungho Kim
Publisher:
ISBN:
Category :
Languages : en
Pages : 302
Book Description
Ultrafast Optical Techniques for High-speed Devices and Mm-wave Circuit Testing
Author: Joungho Kim
Publisher:
ISBN:
Category :
Languages : en
Pages : 302
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 302
Book Description
High Speed Signal Generation, Guidance and Detection in the Millimeter-wave Regime by Ultrafast Optical Techniques
Author: Heng-Ju Cheng
Publisher:
ISBN:
Category :
Languages : en
Pages : 278
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 278
Book Description
Application of Ultrafast Optical Techniques to the Characterization of MM-Wave Integrated Circuits and Radiating Structures
Author: Kyoung Yang
Publisher:
ISBN:
Category :
Languages : en
Pages : 532
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 532
Book Description
Optoelectronic Techniques for Microwave and Millimeter-wave Engineering
Author: William M. Robertson
Publisher: Artech House Publishers
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 264
Book Description
Gain fingertip access to the principles that make optics useful for microwave/millimeter waves. Packed with 108 figures and 163 equations, this clearly written book illustrates these principles by detailing specific applications.
Publisher: Artech House Publishers
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 264
Book Description
Gain fingertip access to the principles that make optics useful for microwave/millimeter waves. Packed with 108 figures and 163 equations, this clearly written book illustrates these principles by detailing specific applications.
Dissertation Abstracts International
Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 994
Book Description
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 994
Book Description
American Doctoral Dissertations
Author:
Publisher:
ISBN:
Category : Dissertation abstracts
Languages : en
Pages : 816
Book Description
Publisher:
ISBN:
Category : Dissertation abstracts
Languages : en
Pages : 816
Book Description
Scientific and Technical Aerospace Reports
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 464
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 464
Book Description
Characterization of Very High Speed Semiconductor Devices and Integrated Circuits
Author: Ravi Jain
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 378
Book Description
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 378
Book Description
Optical Techniques for Millimeter-wave Detection and Imaging
Author: Christopher Arnim Schuetz
Publisher: ProQuest
ISBN: 9780549182092
Category : Imaging systems
Languages : en
Pages :
Book Description
The benefits of imaging using regions of the electromagnetic spectrum outside the visible range have been known for decades. Infrared and radio frequency imaging techniques have achieved great successes in both military and civilian applications. However, there remains a range of the spectrum between these two regimes that remains relatively unexplored. Millimeter waves, or the range of wavelengths between one millimeter and one centimeter, have remained relatively unexplored as an imaging technology, largely due to the lack of sufficiently sensitive, practical detectors for passive imaging in this regime. At these short wavelengths, the diffraction limit imposed by the limited extent of the imaging aperture significantly limits attainable image resolution. Recent developments in semiconductor low-noise amplifiers have demonstrated many desirable applications for such imaging technology, but have, as yet, not been able to demonstrate the economical, small-format imagers necessary to make such imagers practical in most of the conceived applications. In this regard, I present a new approach to millimeter-wave detection based on optical modulation with subsequent carrier suppression. This approach demonstrates promise in achieving the goal of economical, high-resolution imagers with sufficient sensitivity for passive millimeter-wave imaging. In this thesis, I explain the operational requirements of such detectors, provide theoretical background for their operation, and describe current experimental results obtained using commercially available components in the 35 GHz. In addition, I describe successful efforts to fabricate modulators with improved modulation bandwidths for detection in the 95 GHz atmospheric window. These demonstration systems have attained sufficient single pixel performance to detect thermal emission with a noise equivalent temperature difference (NETD) approaching 1K/[Special characters omitted.] at both 35 and 95 GHz. The NETDs attained correspond to sub-picowatt noise equivalent powers which, to the best of my knowledge, have never before been obtained without the use of millimeter-wave low noise amplifiers or cryogenic cooling. The described optically-based detection technique has also demonstrated unique advantages to overcoming the resolution limits imposed by aperture size. Since the optical upconversion process preserves the phase of the collected energy, coherent imaging methods are possible. This enables the use of distributed aperture imaging, which could potentially provide large effective apertures for high resolution without the associated volumetric scaling associated with traditional focal plane arrays. Optical fiber can be utilized to provide low-loss, dispersion-free routing of the upconverted energy and optical lenses and cameras can be used to reconstruct the sampled image in a relatively simple manner. The combination of these factors offers potential for a uniquely capable millimeter-wave imaging technology based on optical upconversion. As part of this dissertation, I describe the relevant parameters that must be considered in designing such an imager and present results from a prototype array that has been successfully demonstrated.
Publisher: ProQuest
ISBN: 9780549182092
Category : Imaging systems
Languages : en
Pages :
Book Description
The benefits of imaging using regions of the electromagnetic spectrum outside the visible range have been known for decades. Infrared and radio frequency imaging techniques have achieved great successes in both military and civilian applications. However, there remains a range of the spectrum between these two regimes that remains relatively unexplored. Millimeter waves, or the range of wavelengths between one millimeter and one centimeter, have remained relatively unexplored as an imaging technology, largely due to the lack of sufficiently sensitive, practical detectors for passive imaging in this regime. At these short wavelengths, the diffraction limit imposed by the limited extent of the imaging aperture significantly limits attainable image resolution. Recent developments in semiconductor low-noise amplifiers have demonstrated many desirable applications for such imaging technology, but have, as yet, not been able to demonstrate the economical, small-format imagers necessary to make such imagers practical in most of the conceived applications. In this regard, I present a new approach to millimeter-wave detection based on optical modulation with subsequent carrier suppression. This approach demonstrates promise in achieving the goal of economical, high-resolution imagers with sufficient sensitivity for passive millimeter-wave imaging. In this thesis, I explain the operational requirements of such detectors, provide theoretical background for their operation, and describe current experimental results obtained using commercially available components in the 35 GHz. In addition, I describe successful efforts to fabricate modulators with improved modulation bandwidths for detection in the 95 GHz atmospheric window. These demonstration systems have attained sufficient single pixel performance to detect thermal emission with a noise equivalent temperature difference (NETD) approaching 1K/[Special characters omitted.] at both 35 and 95 GHz. The NETDs attained correspond to sub-picowatt noise equivalent powers which, to the best of my knowledge, have never before been obtained without the use of millimeter-wave low noise amplifiers or cryogenic cooling. The described optically-based detection technique has also demonstrated unique advantages to overcoming the resolution limits imposed by aperture size. Since the optical upconversion process preserves the phase of the collected energy, coherent imaging methods are possible. This enables the use of distributed aperture imaging, which could potentially provide large effective apertures for high resolution without the associated volumetric scaling associated with traditional focal plane arrays. Optical fiber can be utilized to provide low-loss, dispersion-free routing of the upconverted energy and optical lenses and cameras can be used to reconstruct the sampled image in a relatively simple manner. The combination of these factors offers potential for a uniquely capable millimeter-wave imaging technology based on optical upconversion. As part of this dissertation, I describe the relevant parameters that must be considered in designing such an imager and present results from a prototype array that has been successfully demonstrated.
Electrical & Electronics Abstracts
Author:
Publisher:
ISBN:
Category : Electrical engineering
Languages : en
Pages : 2240
Book Description
Publisher:
ISBN:
Category : Electrical engineering
Languages : en
Pages : 2240
Book Description