西安交大天线课件2

1、 E = dE = j 0 0 Lt 60 I o sin I o e jkro e jkz(1cos dz r kL t sin (1 cos 60 I o kL t 2 = sin kL t ro 2 (1 cos 2 Lt F( = sin sin kL t (1 cos 2 kL t (1 cos 2 sin Lt = 0o = 0o sin kL t (1 cos 2 m1 = cos 1 (1 2L t 二 、直 线 式 离 散 阵 N Io ( = I I = I e I = I e I = I e 0 1 I2 34 M5 6 9 7 8 8 A r = C D E A F d

2、 cos B 7G 9 7 M5 6 H B = + kd cos & I S 9 G PT R 5 6 7 PQ R 5 6 7 Q R & P 5 6 7 G PU R 5 d !#$%& j j2 j(N 1 1 o 2 o 3 o N o 6 7 & 2 Y !a V $ % W7X M5 6 b E=E c +E + . + E de 1 2 N f !DE E=E1 + E 2 + E3 + . + E N 7 d e M 5 6 E=E11+e j + e j2 + . + e j(N 1 M5 6 7 c g H E = E1 f a ( f a ( = 1+e j + e j

3、2 + . + e j(N 1 h s = =0 ! 1 e jN sin(N 2 = j 1 e sin( 2 7 i p H M5 6 lim f a ( =N 0 f qr f % ( = sin(N 2 f a N sin( 2 t uv w !x h ! H y H y H =0 N! = 90 7 H C f S = 90 % ( = f f = + kd cos = kd cos o o rn o vw F j = 90 m vw qo k sin(N 2 j =0 N sin( 2 k m S l = 2m m=1,2,3. r =0 m n = 2m opqo o p r o

4、 s t u r x y z g | z 2 , 2 3 4 =0 ! d e f ! ghi 56 a o ro q o l =0 = kd = 90 = 0 = 180 h kd, kd = kd 0 180 d e a d= 2 B g x r o f d= 2 kd= h y vw r o , 2 2 d o o o o 9 p =0 =0 =0 = kd =0 kd = kd =0 kd = kd o o o o = 0o = + kd cos = kd+kd cos = kd( cos + 1 = 0o = 0 = 90o = kd = 180o = 2kd o $ % & o 0

5、 180 ! ! 0, 2kd # 0 ( ! 0, # d= 4 2kd= ! 1 2345 6 8 2 2 7 = 0o 9 AB CDEF GHI P d 2 QR ST U V W X Y 9 A 6 a b c d e f g 5 h i 1 p q 2 r 7 Nkd sin ( cos + 1 2 % ( = f a kd N sin ( cos + 1 2 s t u d= 4 v = kd= 90 w 0 180 # x y t ! ! 0, # O B c d 0 1 ! u ! 0 180 1 e t ! OB OB QR tg5 0 2 0 180 !i j d fefw g5 h k 6Q g 5 lm g5 i1nkojp g5 r 0 q 7 r d s t u o o o o o o o r s = kd( cos + 1 = (kd N N N sin kd( cos + 1 N 2 % ( = sin( f a 2N 1 N sin kd( cos + 1 N 2 x v w x