Thesis (M.S. in Systems Engineering)--Naval Postgraduate School, Sept. 2004. / Thesis Advisor(s): Donald Wadsworth, Robert Looney. Includes bibliographical references (p. 137-144). Also available online.

Thesis (M.S.)--School of Advanced Air and Space Studies, 2008. / "June 2008." Vita. Includes bibliographical references (p. 56-59). Also available via the Internet.

Thesis (M.S. in Systems Engineering)--Naval Postgraduate School, June 2005. / Thesis Advisor(s): Phillip E. Pace, Murali Tummala. Includes bibliographical references (p.155-158). Also available online.

Thesis (MScIng)--University of Stellenbosch, 2004. / ENGLISH ABSTRACT: Limiting amplifiers are employed in electronic warfare (EW) systems requiring a high measure of amplitude control. These EW systems employ sensitive signal processing components that are unable to accept the full dynamic range of input signals the system must face. The limiting amplifier, however, offers the unique capability of reducing the received signal spectrum to a suitable dynamic range. A typical application of the limiting amplifier is in the instantaneous frequency measurement (IFM) receiver where the limiting amplifier allows the receiver to accurately measure pulsed signals over a wide input dynamic range The aim of this study is the design and analysis of a broadband limiting amplifier. Focus is placed on the design of a socalled backbone limiting amplifier (BLA) which forms an integral part of a proposed modular design approach for realizing a design with improved input dynamic range. A designed BLA is discussed in this thesis while insight is given as to the intricacies associated with its mechanism of operation. Over its 45 dB (- 40 to + 5 dBm) input dynamic range, the designed 2-18 GHz limiting amplifier offers a typical saturated output power of 7.5 dBm while harmonic suppression of better than 8.6 dBc is achieved. The BLA design was based on an existing limiting amplifier design, the so-called baseline limiting amplifier, employing alternating amplifiers and attenuators. Evaluation of the baseline limiting amplifier design allowed for formulation of a design hypothesis for realizing the BLA design. Physical measurements on the BLA were then used to scrutinize and validate the formulated design hypothesis. The requirements for realizing the BLA design were the establishment of a thorough radio frequency (RF) amplifier design capability, an understanding of the nonlinear phenomena associated with the RF amplifier and the utilization and control thereof within the limiting amplifier. Different RF amplifier designs that were carried out are discussed in this thesis, while it is shown how they were used to further investigate important design considerations for application in the BLA design. The computer-aided design packages namely MultiMatch and Microwave Office (MWO) were successfully used in realizing the desired broadband RF amplifier designs and the eventual BLA design. / AFRIKAANSE OPSOMMING: Beperker versterkers word gebruik in elektroniese oorlogvoering (EO) stelsels waar ’n redelike mate van amplitude beheer noodsaaklik is. Sensitiewe seinverwerking komponente, wat nie die volle dinamiese bereik van intreeseine kan hanteer nie, maak deel uit van hierdie EO stelsels. Die beperker versterker bied egter die unieke eienskap om die ontvangde seinspektra te reduseer tot ’n gepaste dinamiese bereik. ’n Tipiese toepassing vir die beperker versterker is as deel van die oombliksfrekwensie- meting ontvanger waar die beperker versterker die ontvanger toelaat om akkurate meting van gepulsde seine te doen oor ’n wye intree dinamiese bereik. Die doel van hierdie studie is die ontwerp en analise van ’n wye-band beperker versterker. Fokus word geplaas op die ontwerp van ’n sogenaamde kruks beperker versterker wat ’n integrale deel uitmaak van ’n voorgestelde modulêre ontwerpsbenadering, wat ten doel het om ’n verbeterde intree dinamiese bereik daar te stel. Oor die 45 dB (- 40 tot + 5 dBm) intree dinamiese bereik, bied die ontwerpte 2-18 GHz beperker versterker ’n tipiese versadigde uittreedrywing van 7.5 dBm terwyl harmonieke onderdrukking van beter as 8.6 dBc verkry is. Die ontwerp van hierdie komponent word in hierdie tesis bespreek terwyl belangrike aspekte oor die werking daarvan uitgelig word. Die ontwerp van die kruks beperker versterker is gebaseer op ’n bestaande beperker versterker ontwerp, of sogenaamde basis ontwerp, wat gebruik maak van afwisselende versterkers en attenuators. Evaluering van die basis ontwerp het toegelaat vir die formulering van 'n ontwerpshipotese om die kruks beperker versterker te realiseer. Fisiese metings op die kruks beperker versterker is gebruik om die ontwerpshipotese krities te evalueer. Om die kruks beperker versterker te realiseer moes die nodige RF versterker ontwerpsvaardigheid daargestel word, ’n begrip vir die nie-liniêere verskynsels in die RF versterker en die gebruik en beheer daarvan in die beperker versterker moes daargestel word. Verskeie RF versterkers wat ontwerp is word in hierdie tesis bespreek, terwyl getoon word hoe hierdie ontwerpe gebruik is om belangrike ontwerpsaspekte te ondersoek wat uiteindelik toegepas is in die kruks beperker versterker ontwerp. Die ontwerpspakkette naamlik MultiMatch en Microwave Office is suksesvol gebruik vir die realisering van die nodige wye-band RF versterkers en die uiteindelike kruks beperker versterker ontwerp.

The purpose of this thesis is the exploration of the relationship and interaction between Electronic Warfare (EW) and Information Operations (IO) core, supporting and related competencies. Understanding the definitions of information and its value, information superiority, and the decision making cycle provides the foundation for the thesis. Investigation of the historical transformation of EW from the U.S. Civil War to the First Gulf War, and also examining how the concept of IO has developed and evolved contributes to this study by helping to comprehend the modern day interaction between EW and each IO competency separately. This interaction is constructed upon the guidance and standards provided by the latest U.S. Joint Chiefs of Staff Publication Joint Publication 3-13 Information Operations. This study concludes that the relationship between EW and IO is increasingly interactive and consists of two aspects: limiting and interfering, and reinforcing and supporting. Also, the relationship between EW and each IO competency is not consistent between the core and supporting competencies. In addition to these conclusions, this study expresses some considerations for EW and IO applications with respect to the unique environment and requirements of the Turkish Republic.

Thesis (M.S. in Systems Engineering (Electronic Warfare))--Naval Postgraduate School, September 1990. / Thesis Advisor(s): Davidson, Kenneth L. Second Reader: Hershey, Scott H. "September 1990." Description based on title screen as viewed on December 29, 2009. Author(s) subject terms: Retractive conditions, prongation, Central America, radar, microwave. Includes bibliographical references (p. 60-61). Also available in print.

Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1992. / Vita. Abstract. Includes bibliographical references (leaves 79-82). Also available via the Internet.

Thesis (M.S.)--School of Advanced Air and Space Studies, 2008. / "June 2008." Vita. Includes bibliographical references (p. 102-108). Also available via the Internet.

Approved for public release; distribution in unlimited. / In Littoral Warfare (LW), naval operations face a whole new range of missions and types of threats. In such situations, Electronic Warfare (EW) systems are extremely important, yet constantly challenged to perform faster and more accurate detection and recognition of potential threats. However, meteorological and oceanographic (METOC) factors can severely modify the effectiveness of EW systems, particularly against low detectable targets in warm waters. Therefore, this thesis analyzes the effects of tropical littoral environments in the expected performance of generic RF and IR systems when used under these scenarios. It analyzes the outputs of propagation models included in the software suites AREPS and TAWS when using actual data from different sources in the Yucatan Channel. The results of this study demonstrated how radically the environmental conditions can change, clearly modifying the efficiency of surveillance and detection systems in shipborne platforms. Further, several issues related to the need of valuable data and additional research are addressed, while providing useful insights to operational commanders and decision makers for the use of EW systems and available Tactical Decision Aids (TDAs) at the typical scenarios of Littoral Warfare in tropical waters. / Lieutenant Commander, Mexican Navy

The goal of this work was to evaluate an electronic warfare system from a human factors engineering perspective. The evaluation began by looking at the top-level system requirements and included a functional analysis of critical components of the man-machine interface. Once a critical operator task was identified, two separate trade-off studies provided objective data for redesign recommendations. The first section of this work defines the operational requirements and maintenance concept for an electronic warfare system. This is the first step in defining the human interface requirements for the system. The second section provides a brief history of the U.S. Navy's AN/SLQ-32(V) Electronic Warfare System. Although recognized as an integral part of the U.S. Navy's defense against low-flying anti-ship missiles, several incidents indicate a need for system improvement. The next section of this work defines the AN/SLQ-32(V). The definition starts from a macro-level and, then, discusses the system to the level necessary to understand the system. The goal was to conduct and document a task analysis of the interface between the operator and the AN/SLQ-32(V). This task analysis was used as a tool to compare system redesign options. The final section of the work involved the acquisition of information from naval operators and the assessment of existing system design features from actual and simulated Display Control Consoles (DCC). The critique of these data considered operator task requirements in actual and simulated electronic warfare scenarios. This included the time required to detect, analyze, and act-upon radar intercepts in anti-ship missile defense. From this evaluation, recommendations were developed and justified for DCC system design changes. / Master of Science