| 摘要 |
<p>A radio receiver antenna system for overcoming multiple path propagation fading comprising: an antenna arrangement (1) which provides respectively at two terminals (9,11) in response to a given transmitted signal, two signals (Va,Vb) at the frequency of the transmitted signal as are respectively produced by two antennas having different reception characteristics; and combining means (T1,T2, 35 to 59) for producing an output at the frequency of the transmitted signal by combining the signals produced at said terminals (9,11) in such manner that said output is significant for substantially all values of the relative phase of said two signals; said combining means (T1,T2, 35 to 59) comprising an inductive winding (49) to opposite ends of which said two signals are respectively applied and means for deriving an output (Vo,Vo<,>) from a tapping point on the winding (49) or from a second winding (53), inductively coupled to said first-mentioned winding (49). Preferably a first output (Vo) is derived from a tapping point on said first mentioned winding (49). <IMAGE></p> |
