Abstract
In these days, the portable televisions such as mobile phones which receive 1 segment of digital terrestrial television broadcasting have spread in Japan. However, as the picture of 1 segment is low resolution, realization of high resolution picture by receiving 12 segments is expected. But required C/N (Carrier to Noise ratio) for receiving 12 segments is higher than 1 segment because of the difference of modulation. So it is necessary to develop 12 segments high sensitive receiving technology. We have introduced 4-Antenna Diversity system in this portable television and developed high sensitive receiving antennas. And then we have evaluated receiving sensitivity with spatial fading emulator and field test. From these results, it has turned out that 12 segments receiving sensitivity of developed portable television is comparable to 1 segment sensitivity of mobile phone.
