B l , m ( E ) = l ( l + 1 ) [ B l ( 1 ) h l ( 1 ) ( k r ) + B l ( 2 ) h l ( 2 ) ( k r ) ] Φ Φ l , m E l , m ( E ) = i k ∇ ∇ × × B l , m ( E ) E l , m ( M ) = l ( l + 1 ) [ E l ( 1 ) h l ( 1 ) ( k r ) + E l ( 2 ) h l ( 2 ) ( k r ) ] Φ Φ l , m B l , m ( M ) = − − i k ∇ ∇ × × E l , m ( M ) ,