ABSTRACT
This chapter is about ultra-wideband (UWB) antennas and arrays of UWB radiators. Most conventional antenna literature is about narrowband antennas and analysis, which covers most practical situations. The UWB antenna design and analysis require an extension of conventional antenna thinking from steady-state to transient conditions. The UWB antenna analysis and design starts from Maxwell’s equations, but uses different assumptions and arrives at different results. The chapter further emphasizes both impulse radiation and nonsinusoidal wave signals. Under the term impulse radiation, consider both single impulses and coded impulse trains used to provide fine range resolution through correlation and to reduce peak power requirements of the radar system while maintaining the same energy on target. Ultra-wideband impulse antenna analysis requires considering some concepts that may be new to many readers.
