Electromagnetic Signals: Reflection, Focusing, Distortion, by Henning F. Harmuth

By Henning F. Harmuth

Electromagnetic Signals offers with the sensible functions of nonsinusoidal electromagnetic waves or provider unfastened radars, ultrawideband expertise and massive relative bandwidth know-how. The publication is exclusive because it offers with a few present traditional radar difficulties besides proposed solutions.

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Extra info for Electromagnetic Signals: Reflection, Focusing, Distortion, and Their Practical Applications

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5: 1 .... t. 6-10. (ll), (14), and (15) for p = 1, p = 5, and q = 1, 1/2, 1/4. 1. 7 ELECTROMAGNETIC MISSILES Starting with a paper by Wu (1985) the concept of electromagnetic missiles, bullets, or propagating focused waves has attracted considerable attention!. The principle can readily be illustrated by means of ray optics. 7-1 that shows a point-like light source denoted radiator R at the location YR in the focal plane II of a lens. The focal plane has the distance Xf from the center x = 0 of the lens.

4 MAGNETIC DIPOLE CURRENTS (0) _ gm(O) _ 2qm 7 mp H o e- 8/(h - e- 8/ 82 v - Noqm mo 2q(1 - 4p2)1/2' P < 1 (33) 2 Equations (32) and (33) are equal for 2qm7mpHo/mo = 2RiJ op/7. (13): iJ(O) = iJo(cos (4 p2 _1)1/20 2pq 1 + (4 p2 -1)1/2 2RiJ op v(O) = - 7 . (4 p2 - 1)1/20) -8/2pq 2pq e , sm 1 p>2 e- 8/ 2pq . (4 p2 _1)1/20 sln~----'-q(4p2 _1)1/2 2pq (35) (36) Equation (9) yields for p > 1/2 the velocity gm(O) 2qm7m H o e- 8/ 2pq . (2p2 - 1)1/20 v(O) = - - = p sm Noqm mo q(4p2_1)1/2 2pq (37) Equations (36) and (37) are equal for 2qm7mpHo/mo = 2RiJ op/7.

Hence, all twelve components of the reflected and transmitted electric and magnetic field strengths are determined. Despite all these results the approach taken so far based on an incident planar wave front is not satisfactory. 2 GENERALIZATION OF SNELL'S LAW FOR SIGNALS 53 reflection and I9 t of transmission. 1-1 reaches the plane z = 0 first at the location y --+ -00 and the time t --+ -00. 1-1. We must develop a more sophisticated model for reflection and transmission than the planar wave front model.

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