Title Mobile-phone antenna design Author(s) ROWELL, CR; Lam, EYM IEEE Antennas and Propagation Magazine, 2012, v. 54, n. 4 p. 14- Citation 34 Issued Date 2012 URL http://hdl.handle.net/10722/185908 Rights IEEEE Antennas and Propagation Magazine. Copyright © IEEE One year later, Nokia debuted the 8810, a small chrome- setup illustrated in Figure 2. TRP is the total radiated power, Mobile-Phone Antenna Design plated handset resembling a large cigarette lighter. Both the and is a measurement of the total radiated power compared to handset and the antenna were a fraction of the size of the an isotropic antenna. The total radiated power is calculated by Hagenuk, and the 8810 quickly became more popular. With integrating the time-averaged radiated power (EiRP) across the 1,2 2 the success of the 8810, Nokia began to produce more models spherical surface enclosing the handset. This is a measure of the Corbett Rowell and Edmund Y. Lam with internal antennas in two separate market segments: the RF transmitting performance of the handset: 88xx, with its metal covers for the high-end market; and the 1ASTRI Hong Kong 3xxx, 6xxx, 7xxx, with plastic covers. By the early 2000s, 1 Room 310-318 Lakeside 2 ≅+θφ θφ θ φ θ the majority of phone models produced by Nokia had internal TRP∫ EiRPθφ()()(), EiRP , sin d d Science Park, Sha Tin, Hong Kong 4π antennas. Given the sheer volume of the different models, E-mail:
[email protected] Nokia used several types of internal antennas with many tech- where is the volume integral over a sphere: nology designs, such as capacitive feeding, parasitics, isola tion ∫ 2Department of Electrical and Electronic Engineering technologies, active antennas, integrated ground planes, new The University of Hong Kong ππ manufacturing technologies, etc.