Designing an accurate digital step attenuator (DSA) with outstanding RF/microwave performance requires careful attention to detail and knowledge of semiconductor process variables.
This simple microstrip antenna features a coplanar-waveguide feed and a U-shaped structure in its radiating element to provide a strong notch for interfering signals at 5 GHz.
By applying cascaded folded stepped impedance resonators, this lowpass filter achieves extremely wide passband and stopband and can be fabricated in a very small circuit size for UWB applications.
Approaches were applied to miniaturize two different types of antennas for applications at UHF, without losing performance when losing physical volume.
Based on the shape of a half-periodic sinusoid, this novel antenna features CPW feedlines and compact size while covering the full 3.1-to-10.6-GHz UWB range.