电磁场理论教学系列札记 梁昌洪).pdfVIP

31 1 Vol. 31 No. 1 2009 2 JOURNAL OF EEE Feb. 2009 梁昌洪, 陈 曦 ( 西安电子科技大学天线与微波技术国防重点实验室, 陕西西安710071) : , , ( ) , [ 6] [ 3- 5] , , Poynting , , Poynting , Foster Lorentz : ; ; : T N813 : A : 1008-0686( 2009) 01-0001-04 CorrespondingResearchbetweenTimeHarmonicFieldandComplexField LIANGChang-hong,CHENXi (StateK ey Lab. of Antennas and Microwave Technology,Xidian University,Xi. an 710071,China) Abstract: The corresponding relationship betw een real ( imaginary) part of the fir st or der quantity and time harm onic field is the foundation of the complex time harm onic field. T his theory has extensive use due to its simple representation. H ow ever the com plex of the second order quantity theory can not be der ived [ 6] from ener gy theorem in general use and the complex Poynting theorem has not been mentioned in many references [ 3-5] . T he com plex form of second or der quantity theor y is presented in detail in this paper, w hich makes a stability foundation for the com plex form of Poynting, Foster and Lorentz theor em . Keywords:time harmonic field and complex field; second order quantity; corresponding strictly 0 X , , A’cos( Xt Ua) ( 1) , , , # j Xt A’cos( Xt Ua) = Re (A’e ) (2) :