L-shaped monopole array for terrestrial broadcasting reception in the UHF band

For the purpose of size-reduction, a printed L-shaped monopole array was developed for terrestrial broadcasting reception at UHF-band. This antenna consists of monopole array having L-shaped structure for downsizing, the length of each radiating element being set to be quarter a free-space wavelength in each UHF TV channel. The characteristics were analyzed and measured. According to the analytical results, the antenna gain was 0 dBi on average from 400 MHz to 700 MHz. The antenna was loaded in a handy-type mobile TV and the carrier noise ratios of analog terrestrial broadcasting channels were evaluated. It was confirmed that the proposed L-shaped monopole array is applicable to mobile and indoor terrestrial broadcasting TV antennas. The dimensions of this antenna are 80 mm in width, 50 mm in height, and 1.6 mm in thickness, sufficiently small to be used for such applications.