Terminal-zone corrections for a dipole driven by a two-wire line

The term inal-zone e ffec ts on t he dipol e ante nn a drive n by a two-wire trans mi ssion line have been re-exam ined.A series indu ctive cO l'l'ectio n Lg together with other terminal-zone cOl'l'ections is found necessary to redu ce t he meas ured appare nt admi tta nce of the a ntenna term inatin g the two-wire line \\'ith the idea l a dmi tta nce of the dipole a nte nna II-hen drive n by a delta-fun ction generato r.The se ri es inductive co rrect ion takes a ccount of t ile abse nc e of the ante nna wire in the g'l betwee n t he two wires of th e transmiss ion line.With t hi s addition a l co rrection, t he meas ured appa re nt ad miLta nce of a dipole a nte nn a ter minatin g a close ly spaced tll'o-w ire line may be broug ht in Lo exce ll e nt agree me nt \\'it h id ea l theoretical values and a lso reco ncil ed with Lhe quite d iffe rent va lu es mcasLIl'ed with a coaxial line for an a nte nn a co nsisLin g of t ile verti cal inne r co ndu ctor o f t he line exte nd ed ove r a horizonta l gro und pla ne.The res ults fur the r show the utili Ly of a de lt a-function ge nera to r in the de finiLi o n of a n ideal t heo retical impeda nce of a dipole a nten lla.