Title :
Influence of the human body on a new coplanar-fed Ultra-Wideband antenna
Author :
Koohestani, M. ; Pires, N. ; Skrivervik, A.K. ; Moreira, A.A.
Author_Institution :
Inst. de Telecomun., Univ. Tec. de Lisboa, Lisbon, Portugal
Abstract :
A new coplanar-fed planar monopole antenna is presented for off-body Ultra-Wideband wearable communication systems. The antenna structure comprises a dome-topped, bowl-shaped radiating element and a 50 Ω coplanar feed line for excitation. Its impedance bandwidth is greater than 118%, from 3.05 to beyond 12 GHz, based on a reflection coefficient smaller than -10 dB criterion. The influence of the human body on the operation of this antenna was studied. In particular, a simplified geometry of a human limb was found to be accurate enough for use in input reflection coefficient simulations. The limb tissues were modelled as frequency-dependent materials. Measurement results show the suitability of the simplified geometry to simulate the antenna in the proximity of a human limb.
Keywords :
antenna feeds; antenna radiation patterns; monopole antennas; planar antennas; ultra wideband antennas; wearable antennas; bowl-shaped radiating element; coplanar feed line; coplanar-fed planar monopole antenna; coplanar-fed ultrawideband antenna; frequency-dependent materials; human body; human limb geometry; human limb proximity; input reflection coefficient simulations; limb tissues; off-body ultrawideband wearable communication systems; resistance 50 ohm; Antenna measurements; Bandwidth; Impedance; Ultra wideband antennas; Ultra-Wideband antenna; coplanar waveguide (CPW)-fed; human body effects;
Conference_Titel :
Antennas and Propagation (EUCAP), 2012 6th European Conference on
Conference_Location :
Prague
Print_ISBN :
978-1-4577-0918-0
Electronic_ISBN :
978-1-4577-0919-7
DOI :
10.1109/EuCAP.2012.6205976
