Frequency-multiplexed Inverted-F Antennas for Multi-band UWB

An invented frequency multiplexing technique is used to combine inverted-F antennas for multi-band UWB. The frequency multiplexing technique allows a number of independent antennas to be used in parallel. In this paper a radio front-end system consisting of three antennas and a frequency multiplexing network is built. Using one antenna for each sub-band within a band-group provides equal performance for the entire band. Both the antennas and the frequency multiplexing network can be integrated on a printed circuit board. The antennas were simulated and measured. S-parameters of the antennas were extracted and used for co-simulation with the frequency multiplexing network. The antenna system fulfills the requirement for Mode 1 UWB.