TE-extra SNR or SIR can be used in discrete steps to increase the bit rate through higher modulation rates (e.g., going from QPSK (quadrature phase shift keying) to 16 QAM (quadrature amplitude modulation) or 64 QAM) or reduced coding. Alternatively, the system capacity can be increased by adding more users with the same bit rate using narrower or fewer channels. Just as a few users in rural areas today discover that some mobile phones work and some do not work (often depending on how well the antennas have been implemented in the phones), all users of 3GPP LTE terminals will experience dif- ferent up- and downlink speeds with different terminals at the same location in both urban and rural areas. The implementation of the antenna solutions will thus immediately affect the user perception, and good single- or multiantenna solutions will be a significant competitive advantage for 3GPPLTE terminal and base station antenna developers and manufacturers. One of the main challenges facing the antenna engineer choosing an antenna configuration is how to reach a design with good performance and how to verify this performance in a reasonable time and at a reasonable cost. One of the differ- ences of small antennas compared to large antennas is that they are much harder to model accurately with software. This is mainly because large antennas normally are used in an open environment without any neighboring objects to disturb the antenna function. Small antennas, on the other hand, are usually integrated in a chassis containing materials that absorb radiation or in different ways disturb the antenna function. Furthermore, in a mobile phone, there are a number of antennas that all affect each other. For small antennas, in a single- or multiantenna configuration, the most important parameter is the antenna efficiency [6] (i.e., the parameter that directly influences how much of the transmitter power is radiated into space or how much of the radiation incident on the antenna reaches the receiver). By optimizing the antenna func