European School of Antennas High Frequency Techniques and

European School of Antennas “High Frequency Techniques and Travelling Wave Antennas” 21 -26 February Siena and Rome

Report on the first short course of the European School of Antennas High Frequency Techniques and Travelling Wave Antennas 21 -26 February Siena and Rome Outline of the course HIGH FREQUENCY (21 -23 February, Siena) 1. Introduction on fundamentals (GO, PO, UTD, PTD) 2. Non uniform asymptotics (stationary phase point) 3. Space domain and spectral domain diffraction integrals 4. Uniform asymptotics with relevant examples 4. 1 Saddle-point – pole interaction (wedge problem) 4. 2 Saddle point-complex pole (evanescent wave diffraction, slab Green’s function) 4. 3 End-point–saddle-point (PO-diffraction, Shadow boundary diffraction) 4. 4 Saddle-point branch point (semi-infinite problem) 4. 5 Three collinear saddle points (curved surface) 5. Uniform evaluation of double- variable diffraction integrals 5. 1 Canonical double integrals 5. 2 Vertex diffraction 5. 3 Double diffraction 6. Diffraction at curved surfaces 7. Gaussian-beam propagation and diffraction 8. Diffraction from impedance wedges and finite strip gratings 7. 1 IBCs (Impedance Boundary Conditions) 7. 2 Diffraction at the edge of isotropic impedance wedges 7. 3 Exact solutions for a class of anisotropic impedance wedges 7. 4 EM scattering from edges in finite strip gratings 9. Incremental Theories 9. 1 Physical Theory of Diffraction 9. 2 Incremental Theory of Diffraction 9. 3 Incremental double diffraction 10. Shadow boundary integral techniques 10. 1 Line integral PO from flat faces 10. 2 Parabolas and hyperbolas 11. Truncated FW diffraction and interaction with complex platforms Speakers S. Maci A. Polemi M. Albani P. Pathak G. Manara A. Toccafondi A. Pippi E. Martini

Report on the first short course of the European School of Antennas High Frequency Techniques and Travelling Wave Antennas 21 -26 February Siena and Rome TRAVELLING WAVE ANTENNAS (24 -26 February, Rome) 1. Introduction to Travelling-Wave Antennas 2. Generalities on 2 D structures and fields, transverse equivalent circuits 3. Bound and leaky modes of a Grounded Dielectric Slab (GDS) 4. Spectral-domain approach for general planar stratified structures 5. Bound and leaky regimes for modes of printed-circuit lines 6. Open 2 D waveguides: discrete spectrum and continuous spectrum 7. Spectral Green’s function for a GDS: singularities, bound modes, continuous spectrum, leaky modes 8. Steepest-descent plane representation and relation to radiation patterns 9. Linear arrays of leaky-wave line sources: spectral properties, 2 D beam scanning 10. 1 D planar LWAs: dispersion curves, constituent aperture fields, and radiation patterns 11. 2 D planar LWAs: general properties and transverse equivalent network model 12. 2 D planar LWAs: general formulas for peak field value, beamwidth, and pattern bandwidth in the principal planes 13. Fundamental properties of broadside radiation from uniform LWAs 14. Transition functions for leaky waves 15. Surface and leaky waves in metamaterial grounded slabs 16. FDTD method for leaky-wave antennas 17. Generalities of 1 D periodic structures and fields 18. Metal Strip Grating on a Grounded Dielectric Slab (2 D structure): Brillouin diagram and spectral properties of spatial harmonics; dispersion curves, mode-coupling effects, and radiation properties 19. 1 D Periodically Loaded Microstrip Line (3 D structure): different leakage regimes, relevant paths of integration, and the modified Brillouin diagram 20. LWAs: Synthesis methods 19. 1 Design procedures 19. 2 Practical aspects 19. 3 Review of LWA types and examples 21. Side-lobe control of single LWAs through tapering: Synthesis, design, manufacture, and testing of stepped LWAs 22. Two-dimensional narrow-beam scanning by frequency and phase: Features of linear LW phased arrays based on microstrip 23. Pattern shaping for arbitrary broad-beam radiation: Synthesis of illuminations with straight LWAs. 24. Spectral features of planar fractal antennas Speakers F. Frezza P. Burghignoli G. Lovat P. Nocito P. Baccarelli A. Galli W. Arrighetti

UN IC PO AL LI MI U CH NIP I AL ME RS UN IP A HU T FE PO R LI BA RO MA 3 TN O I UN IF PO LIT O NZ A PI E UN IS SA LA 10 9 8 7 6 5 4 3 2 1 0 I Number of participants TOT: 31 students 24 20 ACE Member (WP 3. 1. 1) ACE Member 10 Non ACE Member 7 ACE Other Number of participants coming from ACE partner institutions, and from non-ACE institutions.

Rome, Prof. Maci, is he during the break or during the lesson? Rome, during the break Siena, Prof. Pathak is showing Keller’s cone Siena, Social Dinner

Results of the exam part 1 High-frequency test part 1

Example of High-frequency test part 1 (Prof. P. Pathak) First and second question (with answers)

Results of the exam part 2 High-frequency test part 2

Example of High-frequency test part 2 (Prof. S. Maci) First, second and third question (with answers)

Travelling Wave Antennas test

Example of Travelling wave antennas test (Prof. F. Frezza) First, second and third question (with answers)

EVALUATION FORM Poor Fair Rating system(%) Average Good Excellent

VCE available conference materials Section: “Education” – “High Frequency Techniques and Travelling Wave Antennas” PDF lectures of the speakers Siena and Rome exams with solutions and results Evaluation form PDF lectures of the speakers

€ Profit / Loss € INPUT enrolment fee OUTPUT € 3200, 00 Siena catering 525, 00 Siena Canteen 645, 00 Roma catering 2100, 00 UNISIshop (conference materials) 132, 00 TRA. IN Bus from Siena to Rome 699, 60 Plane ticket (Prof. Pathak) 494, 00 Prof. Pathak payement 800, 00 Social dinner 800, 00 Hostess service TOT. 3200, 00 € TOT. 85, 00 6280, 60

How to manage the fees Bruno Casali wrote: I asked to the EC which financial approach we have to follow about the fees paid by the ESo. A participants. The answer is the following: "The fees have to be declared as receipts by each partner and period in the individual form C. Only at the end of the project we'll see whether the receipts have an impact in the calculation of the funding. (The basic principle is that the participation in a project cannot lead to profits). "