第20讲 平面电磁波(IV)

1、主讲：史琰主讲：史琰()yxjjjkzxxmyymEa Ea E ee)cos()cos(yymyxxmxkztEEkztEExmymmEEE2xy jaaEEyxm kzt01011jk ziyiHaE e10jk zixiEa E e10jk zrxrEa E e1011jk zryrHaE e 111111,k11111001001 ()1()jk zjk zirxirjk zjk ziryirEEEa E eE eHHHaE eE e00 ()0 xiraEE001riEE 110101111( , )Re2sinsin( , )Re2coscosj txij tiyE z tE ea

2、Ek ztEH z tH eak zt00111022cosiiSzyxzEEJaak za 1111100011000111()2sin12()cosjk zjk zirxiixijk zjk ziryiiyiEEEa E eE eajEk zHHHaE eE eaEk z 111max111max( , ) 0(0,1,2.)2( , )( , ) 0(21)(21)(0,1,2.)24( , )E z tk znznnH z tHH z tk znznnE z tE =1010111( , )2sinsin( , )2coscosxiiyE z taEk ztEH z tak zt2*0

3、11111141ReResincos02iavzESEHa jk zk z2011( , )( , )( , )sin2sin2izES z tE z tH z tak zt220021jk ztxtjk ztytEa E eHaE e222222,k 11111001001 ()1()jk zjk zirxirjk zjk ziryirEEEa E eE eHHHaE eE e111111,k000triEEE0001211()irtEEE020212tiETE021021riEE T1111111111102000101()(1)(1)()(1)2 sin(2 sin)jk zjk zir

4、xijk zj k zxijk zjk zjk zxijk zxijk zxiEEEa Eeea E eea Eeeea Eejk za ETejk z1111010111()12 cosjk zjk ziryijk zyiHHHaEeeaETek z 2/1121112/11211)2cos21 (1)2cos21 (zkEHHzkEEEmm2/,.)2 , 1 , 0(2211nznnzk1max1min1(1)1(1)mmEEEHHE 112(21) (0,1,2,.)(21)/4k znnzn 1min1max1(1)1(1)mmEEEHHE 21/211121/21111(12cos

5、2)1(12cos2)mmEEEk zHHEk z maxmin11ESE 22202021jk ztxijk ztyiEEa TE eHHaTE e2*0,111Re22iav iiizESEHa2220*,111Re22iav rrrzav iESEHaS 222*0111,111Re(1)(1)22iavzav iESEHaS 2220*12,2211Re22iavav tttzav iTESSEHaTS2211,22(1)avav iav iavSSTSS 020212tiETE021021riEE 101001(),2jk zixyEajaE ek 10()2jk zrxyEajaE

6、 e2022200(),32jk ztxyTEajaE ek 5 . 02, 5 . 01221212T%7525. 011%255 . 02,22,iavtaviavravSSSS604,120000200121221211212,2331TS 111222221 230020.54rcmkffMHzvcmkffxaxaxaxaxaxayayayayayaya220,122200,1122200,221/260|1/22540|2/22135iav izzriav rzzztiav tzzzESaaW mEESaaaW mETESaaaW m 2,(1)av iav rav iav tSSS

7、S 11 011jk ziiyEHae111 0jk zixiEa E e111 0jk zrxrEa Ee11 011jk zrryEHae 2()22 0jkz dixiEa Ee2()2 022jkz diiyEHae2()22 0jkz drxrEa Ee2()2 022jkz drryEHae 3()33 0jkz dixiEa E e3()3 033jkz diiyEHae2222()()2222 02 0()()2222 02 02 /jkz djkz dirxirjkz djkz diryirEEEa EeEeHHHa EeEe33()33 0()33 03/jkz dxijk

8、z dyiEa EeHa Ee11111111 01 01111 01 01 () ()/jk zjk zirxirjk zjk ziryirEEEaE eEeHHHaE eEe)(,)0(,32322121dzHHEEzHHEEtttttttt( )( )( )xyEzZ zHz/)()()(00jkzjkzyxeEeEzHzEzZ/)()()(00jkzjkzyxeEeEzHzEzZzjkzjkzjkzjkyxeeeezHzEzZ11111111)()()(ljkljkljkljkyxeeeelHlElZ11111111)()()(2121 21112111111121121cossint

9、an()cossintank ljk ljk lZlk ljk ljk llkjlZ111tan)(21112111111121121cossintan()cossintank ljk ljk lZlk ljk ljk l22221 01 02 02 01 01 02 02 01211()()jk djk dirirjk djk dirirEEEeEeEEEeEe2 02 03 02 02 03 02311()iriiriEEEEEE23230202irEE121201010)0()0(ZZEEirdkjdkjZ23222322tantan)0(23230202irEE121201010)0()0(ZZEEirdjkidkjieEeE220120021102233032iiEEdkjdkdkjdkZ23222223212sincossincos)0()sincos()coscos(2223223221dkjdkdkjdkdkdk2321coscosdkdk222231sinsindkdk2321coscosdkd