Multiband antenna composed of 1 monopole and 4 parasitic poles for in-building mobile communication

This paper presents a multiband antenna composed of one monopole and four parasitic poles for the in-building mobile system including a firefighting radio band. A center pole is resonated at 450 MHz of the firefighting band, parasitic poles are considered for the multi-resonance and the beam direction control. The measured results such as the reflection coefficients and the radiation patterns of a fabricated antenna are agreed well with the simulation results.