圆柱介质波导的场方程 cosm(D () (29-12) sIno R(r)=DJm(ker) rsa (29-13) R2(r)=D,Km(kr) (rsa 其中 k2=03E1-B2=B2+02F1=k2n2-2 2=B2-0252=B=0HE2=B2-k2n2(29-14)( ) cos sin     =      C  = m m Ce jm (29-12) R r D J k r r a R r D K k r r a m c m c 1 1 1 2 2 2 ( ) ( ) ( ) ( ) ( ) ( ) = =    ＜ ＞ (29-13) 其中 k k n k k n c r c r 1 2 0 2 0 1 2 2 2 0 0 1 0 2 1 2 2 2 2 2 2 0 2 2 2 0 0 2 2 0 2 2 2 = − = − + = − = − = − = −                          (29-14) 一、圆柱介质波导的场方程