新手再求教一個(gè)問(wèn)題

我是新手，在學(xué)習(xí)天線方面的知識(shí)，看書(shū)過(guò)程中有個(gè)問(wèn)題，雖然小，但是竟然沒(méi)找到答案，請(qǐng)高手指點(diǎn)。 
 
天線的E面，我理解E就代表electric field， 那H面的H，是啥的縮寫(xiě)？磁應(yīng)該是magnatic吧。謝謝！ 

網(wǎng)友回復(fù):

H是磁場(chǎng)的縮寫(xiě)，不用M。

網(wǎng)友回復(fù):

個(gè)人猜測(cè)這個(gè)H的來(lái)源是hypothetical，不知道對(duì)不對(duì)

網(wǎng)友回復(fù):

H不是縮寫(xiě)，是延續(xù)前人的用法，代表磁場(chǎng)，所以才一直留到了現(xiàn)在， 
麥克斯韋方程都是用的H。 
 
參考材料： 
The standard graduate textbook by J. D. Jackson "Classical Electrodynamics" specifically follows the historical tradition, specifically, "In the presence of magnetic materials the dipole tends to align itself in a certain direction. That direction is by definition the direction of the magnetic flux density, denoted by B, provided the dipole is sufficiently small and weak that it does not perturb the existing field". Similarly, in Section 5 of Jackson, H is referred to as the magnetic field. Hence, Edward Purcell, in Electricity and Magnetism, McGraw-Hill, 1963, writes, Even some modern writers who treat B  as the primary field feel obliged to call it the magnetic induction because the name magnetic field was historically preempted by H. This seems clumsy and pedantic. If you go into the laboratory and ask a physicist what causes the pion trajectories in his bubble chamber to curve, he'll probably answer "magnetic field", not "magnetic induction." You will seldom hear a geophysicist refer to the Earth's magnetic induction, or an astrophysicist talk about the magnetic induction of the galaxy. We propose to keep on calling B the magnetic field. As for H, although other names have been invented for it, we shall call it "the field H" or even "the magnetic field H." In a similar vein, M Gerloch (1983). Magnetism and Ligand-field Analysis. Cambridge University Press. p. 110. ISBN 0521249392. http://books.google.com/？id=Ovo8AAAAIAAJ&pg=PA110.  says: “So we may think of both B  and H as magnetic fields, but drop the word 'magnetic' from H  so as to maintain the distinction ... As Purcell points out, 'it is only the names that give trouble, not the symbols'.”

網(wǎng)友回復(fù):

H代表磁場(chǎng)， E代表電場(chǎng)

申明：網(wǎng)友回復(fù)良莠不齊，僅供參考。如需專(zhuān)業(yè)解答，請(qǐng)咨詢本站專(zhuān)家，或者學(xué)習(xí)本站天線設(shè)計(jì)視頻培訓(xùn)課程。