Internal DTV antenna for folder-type mobile phone

By using the upper and lower ground platies of of a folder-type mobile phone, a novel internal shorted dipole antenna,for digital television (DTV) signal reception in the 470-806-MHz, hand is presented. The shorted dipole antenna further comprises an internal matching circuit. which includes a chip capacitor and two narrow metal strips, for achieving improved impedance matching over the DTV band of 470-806 MHz. The proposed DTV antenna was constructed and studied. The measured return loss for the operating frequencies over the DTV band is better than 2.5:1 VSWR. In addition, good radiation characteristics are also obtained. Design considerations of the proprosed internal DTV antenna are described. A parametric study of the internal matching circuit on the impedance matching of the antenna is also presented. (c) 2006 Wiley Periodicals, Inc.