The tuning range is between 2.5 3.6 GHz along with theload impedance value changes from L1 to C3 in table 1. Thecenter frequencies of CCSL are only presented because thereis no change in the resonance frequency of PIFA dependingon the load impedance values. The physical lengths for bothradiators are optimized at 3.4 GHz with the load impedanceof C3 (0.1 pF).By using L1 (2.2 nH), the center frequency of the CCSL istuned to 2.6 GHz and the bandwidth of the PIFA is extendeddown to 2.5 GHz covering 3GPP band 7, 38 and 41. The PIFAis designed in a way that its bandwidth covers up to 3.6 GHzregardless of the load impedance values.