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1. |
Record Nr. |
UNINA9910704822303321 |
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Titolo |
Hearing on National Defense Authorization Act for Fiscal Year 2014 and oversight of previously authorized programs before the Committee on Armed Services, House of Representatives, One Hundred Thirteenth Congress, first session : Subcommittee on Strategic Forces hearing on budget request for national security space activities, hearing held April 25, 2013 |
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Pubbl/distr/stampa |
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Washington : , : U.S. Government Printing Office, , 2013 |
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Descrizione fisica |
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1 online resource (iii, 106 pages) : portraits |
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Soggetti |
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Space control (Military science) - United States - Finance |
Space security - Finance |
Space surveillance - United States - Finance |
Astronautics, Military - United States - Finance |
Legislative hearings. |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Note generali |
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Title from title screen (viewed on October 18, 2012). |
Paper version available for sale by the Superintendent of Documents, United States Government Printing Office. |
"H.A.S.C. no. 113-40." |
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2. |
Record Nr. |
UNINA9910495754603321 |
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Autore |
Braive Gaston |
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Titolo |
Histoire des Facultés universitaires Saint-Louis : Des origines à 1918 / Gaston Braive |
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Pubbl/distr/stampa |
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Bruxelles, : Presses de l’Université Saint-Louis, 2019 |
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ISBN |
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Descrizione fisica |
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1 online resource (384 p.) |
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Disciplina |
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Soggetti |
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Sociology |
histoire politique |
paix |
presse |
doctorat |
XIXe siècle |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Sommario/riassunto |
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L’ouvrage, consacré à l’histoire de l’une des institutions universitaires belges, dépasse largement le cadre du mémorial. Il resitue les origines mouvementées des Facultés Saint-Louis dans le contexte politique et religieux du temps où s’affrontent le pape Pie IX, le cardinal Sterckx, la Curie et le premier ministre belge de l’époque, mais aussi les Jésuites, belges et romains, le nonce apostolique gagné à sa cause, l’évêque de Gand et les responsables de l’Université de Louvain, menacée dans sa position de monopole. L’étude de cet établissement universitaire bruxellois permet d’évoquer toute une tranche de vie de la période 1858-1914 : programmes des cours, horaires et règlements, personnalité des enseignants, activités para-universitaires, depuis l’important Cercle Académique jusqu’au pittoresque St George’s Club. Elle se termine par une évocation de l’action des étudiants et des professeurs pendant la guerre 1914-1918. |
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3. |
Record Nr. |
UNINA9911020003103321 |
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Autore |
Visser Hubregt J |
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Titolo |
Array and phased array antenna basics / / Hubregt J. Visser |
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Pubbl/distr/stampa |
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Chichester, West Sussex, England ; ; Hoboken, NJ, : John Wiley & Sons, c2005 |
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ISBN |
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9786610339914 |
9781280339912 |
1280339918 |
9780470345955 |
0470345950 |
9780470871195 |
0470871199 |
9781601195524 |
1601195524 |
9780470871188 |
0470871180 |
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Descrizione fisica |
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1 online resource (377 p.) |
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Disciplina |
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Soggetti |
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Antenna arrays |
Antennas (Electronics) |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Note generali |
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Description based upon print version of record. |
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Nota di bibliografia |
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Includes bibliographical references and index. |
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Nota di contenuto |
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Array and Phased Array Antenna Basics; Contents; Preface; References; Acknowledgments; Acronyms; 1 Radiation; 1.1 The Early History of Electricity and Magnetism; 1.2 James Clerk Maxwell, The Union of Electricity and Magnetism; 1.3 Radiation by Accelerated Charge; 1.4 Reactive and Radiating Electromagnetic Fields; References; 2 Antennas; 2.1 The Early History of Antennas; 2.1.1 Resonant Electric Circuit; 2.1.2 Heinrich Hertz: The First Antenna and Radio System; 2.1.3 Guglielmo Marconi, the Dawn of Wireless Communication; 2.1.4 After the First Transatlantic Transmission; 2.1.5 Directivity |
2.2 Antenna Developments During the First World War2.3 Antenna Developments in Between the Wars; 2.3.1 Broadcasting; 2.3.2 |
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Microwaves; 2.4 Antenna Developments During the Second World War; 2.4.1 Radar; 2.4.2 Other Antenna Developments; 2.5 Post-War Antenna Developments; 2.5.1 Frequency Independent Antennas; 2.5.2 Helical Antenna; 2.5.3 Microstrip Patch Antenna; 2.5.4 Phased Array Antenna; References; 3 Antenna Parameters; 3.1 Radiation Pattern; 3.1.1 Field Regions; 3.1.2 Three-Dimensional Radiation Pattern; 3.1.3 Planar Cuts; 3.1.4 Power Patterns and Logarithmic Scale |
3.1.5 Directivity and Gain3.1.6 Reciprocity; 3.1.7 Antenna Beamwidth; 3.2 Antenna Impedance and Bandwidth; 3.3 Polarisation; 3.3.1 Elliptical Polarisation; 3.3.2 Circular Polarisation; 3.3.3 Linear Polarisation; 3.3.4 Axial Ratio; 3.4 Antenna Effective Area and Vector Effective Length; 3.4.1 Effective Area; 3.4.2 Vector Effective Length; 3.5 Radio Equation; 3.6 Radar Equation; 3.6.1 Radar Cross-Section; References; 4 The Linear Broadside Array Antenna; 4.1 A Linear Array of Non-Isotropic Point-Source Radiators; 4.2 Plane Waves; 4.3 Received Signal; 4.4 Array Factor |
4.5 Side Lobes and Grating Lobes4.5.1 First Side-Lobe Level; 4.5.2 Grating Lobes; 4.6 Amplitude Taper; References; 5 Design of a 4-Element, Linear, Broadside, Microstrip Patch Array Antenna; 5.1 Introduction; 5.2 Rectangular Microstrip Patch Antenna; 5.2.1 Cavity Model; 5.2.2 Input Impedance and Radiated Fields; 5.2.3 Rectangular Microstrip Patch Antenna Design; 5.3 Split-T Power Divider; 5.3.1 Analysis Basic Power Divider; 5.3.2 Analysis Impedance Transformer; 5.3.3 Power Divider Scattering Matrix; 5.3.4 Split-T Power Divider Simulation |
5.4 Transmission and Reflection Coefficients for a Corporate Fed Array Antenna5.4.1 Two-Element Subarray; 5.4.2 Four-Element Array; 5.5 Simulation, Realisation and Measurement; 5.5.1 Realisation; 5.5.2 Simulation and Measurement; References; 6 The Linear Endfire Array Antenna; 6.1 Introduction; 6.2 Phase Differences; 6.3 Hansen-Woodyard Endfire Array Antenna; 6.4 Mutual Coupling; 6.5 Yagi-Uda Array Antenna; 6.5.1 Mutual Impedance; 6.5.2 Radiation; 6.5.3 Antenna Design; References; 7 The Linear Phased Array Antenna; 7.1 Linear Phase Taper; 7.2 Beam Broadening |
7.3 Grating Lobes and Visible Space |
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Sommario/riassunto |
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Reflecting a growing interest in phased array antenna systems, stemming from radar, radio astronomy, mobile communications and satellite broadcasting, Array and Phased Array Antenna Basics introduces the principles of array and phased array antennas. Packed with first-hand practical experience and worked-out examples, this is a valuable learning tool and reference source for those wishing to improve their understanding of basic array antenna systems without relying heavily on a thorough knowledge of electromagnetics or antenna theory.Features a general introduction to antennas a |
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