| 摘要 |
receiver antennas for communication radio links operating in very-low-, low-, medium-, and high-frequency bands. SUBSTANCE: antenna has N groups each incorporating N ferrite rods; each rod carries respective antenna coil; antenna coils in each group are connected is series and in phase and high-frequency transformer winding of respective group is connected between starting and finishing leads of last antenna coil of respective group. Each i-th rod in each j-th group (i, j = 1, N) is turned relative to first rod (i = 1) through angle corresponding to i-th value of j-th Walsh function; auxiliary winding of high-frequency transformer functions as output of magnetic antenna as a whole. EFFECT: enhanced efficiency and gain of antenna at same directivity pattern. 2 cl, 1 dwg
|
