With the evolution of a myriad number of wireless products operating at different frequency spectraSpectrum, it is important to design and characterize antenna systems that are complex in nature. Antennas that have been characterized for the realReal-world analysisAnalysis would deliver better results when deployed in practical scenarios. This chapter explores a wide variety of advanced antenna designs in the context of a full-waveFull-wave solver. The chapter includes a detailed ready reckonerReady-reckoner style of treatment to a variety of advanced antenna designs. The chapter includes a discussion on electrically large surfaces, multiple portPort antennas, large frequency-ratio antennas, widebandWideband antennas and reconfigurableReconfigurable antennas.