In this chapter, we shall analyze selected illustrative problem configurations to demonstrate the use of some Cagniard-DeHoop (CdH)-based analytical tools for achieving closed-form time-domain (TD) solutions. First, to demonstrate the principle of a version of the CdH technique that is suitable for describing the short-range electromagnetic (EM) signal wireless transfer between antennas, we shall study the loop-to-loop signal transmission via a thin highly conductive layer. The introduced analytical methodology is directly applicable to the estimation of the (low-frequency) shielding effectiveness in standardized experimental scenarios (see [1, Appendix C], for instance), for instance, and can be further extended to more complex problem configurations consisting of fundamental EM radiators integrated in a layered structure. Consequently, we shall demonstrate how the analytical methodology described in Section 4.3.1 can be extended to incorporate plasmonic properties of the layer lying in between the transmitting and receiving loop antennas. Finally, a modified Kirchhoff approximation is applied to analyze the pulsed EM radiation from a two-dimensional (2-D) slot-excited Fabry-Pérot antenna. Again, the approximate analysis yields TD expressions that give some insights into the pulsed EM phenomenon.

Chapter Contents:

• 16.1 Loop-to-loop pulsed EM close-range signal transfer via a conductive sheet
• 16.1.1 Problem formulation
• 16.1.2 Problem solution
• 16.1.3 Illustrative examples
• 16.2 Loop-to-loop pulsed EM signal transfer via a plasmonic sheet
• 16.3 A Kirchhoff-approximation-based analysis of a slot-excited resonator antenna
• 16.3.1 Problem formulation
• 16.3.2 Problem solution
• 16.3.3 Illustrative examples
• References

Inspec keywords: receiving antennas; transmitting antennas; electromagnetic waves; slot antennas; time-domain analysis; loop antennas; plasmonics; metamaterial antennas; electromagnetic shielding

Other keywords: analytical methodology; pulsed EM radiation; complex problem configurations; loop-to-loop signal transmission; receiving loop antennas; Cagniard-DeHoop-based analytical tools; modified Kirchhoff approximation; plasmonic properties; short-range electromagnetic signal wireless transfer; layered structure; fundamental EM radiators; CdH technique; two-dimensional slot-excited Fabry-Perot antenna; closed-form time-domain solutions; miscellaneous applications; shielding effectiveness; highly conductive layer

Subjects: Single antennas; Metamaterials and structures (microwave); Electromagnetic compatibility and interference; Mathematical analysis