New and Updated Models and Applications in Version 5.2a Log-Periodic Antenna for EMI/EMC Testing A log-periodic antenna is known to be a wideband or frequency-independent antenna. One of the most popular forms of such an antenna is the coplanar dipole array type, which is commonly used for UHF-range antenna measurements in an anechoic chamber. This example computes the voltage-standing-wave-ratio (VSWR) and far-field radiation pattern between 250 MHz and 750 MHz. Signal Integrity (SI) and Time-Domain Reflectometry (TDR) Analysis of Adjacent Microstrip Lines A signal integrity (SI) analysis gives an overview of the quality of an electrical signal transmitted through electrical circuits, such as high-speed interconnects, cables, and printed circuit boards. The quality of the received signal can be distorted by noise from outside the circuit and can be degraded by impedance mismatch, insertion loss, and crosstalk. In practice, EMC/EMI analyses are run to estimate the susceptibility of a device or a network to an undesired coupling. In this example tutorial, we examine the crosstalk effect between two adjacent microstrip lines on a microwave substrate. The simulated results provide the time-domain reflectometry (TDR) response at the coupled ports and show increased distortion of a signal at higher data rates. Plasmonic Wire Grating Simulator The upgraded plasmonic wire grating simulator app, which computes coefficients of refraction, specular reflection, and first-order diffraction for a wire grating on a dielectric substrate, shows the enhanced view of electric field magnitude for multiple grating periods for a selected angle of incidence, now in 3D.