International Journal of Antennas and Propagation / 2008 / Article / Tab 6 / Research Article
Anticipated Impact of Hand-Hold Position on the Electromagnetic Interaction of Different Antenna Types/Positions and a Human in Cellular Communications Table 6 Computational results of the
antenna input impedance,
in dB, radiation
efficiency,
, and total efficiency,
, for different handset setups at 2025 MHz.
Parameter Frequency/2025 MHz
(Ohm)
(dB)
(%)
(%)Handset model A1 A2 A1 A2 A1 A2 A1 A2 No head In free space 41.8 + j12.3 41.8 + j12.3 −15.9 −15.9 92.0 92.0 89.6 89.6 In hand1 37.6 + j11.2 49.4 + j2.06 −14.4 −33.3 55.4 65.5 53.5 65.4 In hand2 72.4 + j28.4 36.4 + j10.1 −10.8 −14.2 32.0 46.1 29.3 44.3 HR-EFH Cheek Hand1 42.3 + j16.8 61.5 + j8.64 −14.1 −17.8 19.1 32.0 18.4 31.4 Hand2 82.8 + j40.9 45.4 + j17.0 −8.5 −14.8 10.5 19.0 9.0 18.3 Tilt Hand1 43.6 + j20.9 60.1 + j9.4 −12.8 −18.1 22.3 33.0 21.1 32.5 Hand2 82.1 + j44.6 45.7 + j18.1 −8.1 −14.4 11.9 20.1 10.1 19.3 Handset model B1 B2 B1 B2 B1 B2 B1 B2 No head In free space 42.7 – j1.80 45.5
+ j4.0 −21.8 −23.9 94.6 94.0 94.0 93.6 In hand1 49.4 – j0.33 70.1
+ j36.5 −43.1 −9.6 67.0 32.8 67.0 29.2 In hand2 73.4
+ j62.7 50.6
+ j25.3 −6.3 −12.2 33.0 38.6 25.3 36.3
HR-EFH Cheek Hand1 49.9
+ j5.50 73.2
+ j38.6 −25.2 −9.1 26.8 16.7 26.7 14.6 Hand2 74.5
+ j75.0 59.3
+ J21.1 −5.3 −13.7 12.0 16.6 8.5 15.4 Tilt Hand1 40.7
+ j2.92 72.6
+ j37.6 −19.3 −9.3 28.8 20.9 28.5 18.5 Hand2 63.4
+ J67.5 50.4
+ j38.6 −5.6 −9.1 14.2 25.0 10.3 23.2