Pulsed Beam Interaction With Propagation Environments: Canonical Example Of Reflection And Diffraction

E. Heyman; R. Ianconescu; L. B. Felsen

doi:10.1117/12.951819

25 July 1989 Pulsed Beam Interaction With Propagation Environments: Canonical Example Of Reflection And Diffraction

E. Heyman, R. Ianconescu, L. B. Felsen

Proceedings Volume 1061, Microwave and Particle Beam Sources and Directed Energy Concepts; (1989) https://doi.org/10.1117/12.951819
Event: OE/LASE '89, 1989, Los Angeles, CA, United States

Abstract

In previous publications [L.B. Felsen and E. Heyman, Proc. SPIE Vol 873 pp. 320-328 1988; E. Heyman, Wave Motion, in press], it has been shown how highly focused pulsed fields in vacuum can be generated analytically by assigning complex values to the space-time source coordinates of the conventional transient free-space Green's function. These new wave objects have been called complex source pulsed beams (CSPB). Their utility can be extended to generating new solutions for pulsed beam propagation and diffraction in a perturbed environment by making the space-time source coordinates in the corresponding Green's function complex. The analytic extension required in this process is performed systematically via the spectral theory of transients (STT) [E. Heyman and L.B. Felsen, IEEE Trans. Antennas Propagat. AP-35 (1987), 80-86, 574-580]. A canonical test case for reflection, including critical angle and lateral (head) wave eflEaTis provided by a dielectric half space. The exact solution for CSPB scattering is derived in spectral integral form, evaluated in terms of the time-dependent and time-independent spatial spectrum singularities in the complex plane, and interpreted physically. Numerical evaluation reveals the detailed space-time behavior of these physical constituents and their role in establishing the total scattered field.

Citation Download Citation

E. Heyman, R. Ianconescu, and L. B. Felsen "Pulsed Beam Interaction With Propagation Environments: Canonical Example Of Reflection And Diffraction", Proc. SPIE 1061, Microwave and Particle Beam Sources and Directed Energy Concepts, (25 July 1989); https://doi.org/10.1117/12.951819

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available