A planar antenna in LTCC for single-package ultrawide-band radio

This correspondence presents a planar antenna in low-temperature cofired ceramic technology for a single-package solution of ultrawide-band (UWB) radio. The antenna has an elliptical radiator fed through a microstrip line. The radiator and the microstrip line share the same ground plane with the other UWB radio circuitry. The experiments have been conducted. Results show that the prototype antenna has achieved bandwidth of 110.9%, gain from -1.34 to 5.43 dBi, broad patterns, and relatively constant group delay at frequencies from 3 to 10.6 GHz. Furthermore, it is also found that the normalized antenna radiated power spectrum density basically conforms to the FCCs regulation on the emission limit of indoor UWB systems.