Alternatively, you can try an omnidirectional aerial to see if it can pull in signals from both directions without causing too much pixelation (the picture breaking up in blocks).

• 作为一个替代方案，你可以尝试全方位天线，看看其能否从前后两个方向接收信号，又不会无缘无故产生太多像素（图像整个劣化）。