▁may ▁no ▁longer ▁be ▁neg lig ible . ▁ ▁For ▁a ▁more ▁general ▁definition ▁of ▁E ta ▁or ▁intr insic ▁imped ance , ▁. ▁Note ▁that ▁Bab inet ' s ▁principle ▁does ▁not ▁account ▁for ▁polar ization . ▁In ▁ 1 9 4 6 , ▁H . G . ▁Book er ▁published ▁S lot ▁Aer ial s ▁and ▁Their ▁Rel ation ▁to ▁Com plement ary ▁W ire ▁Aer ial s ▁to ▁extend ▁Bab inet ' s ▁principle ▁to ▁account ▁for ▁polar ization ▁( other wise ▁known ▁as ▁Book er ' s ▁Ext ension ). ▁This ▁information ▁is ▁drawn ▁from , ▁as ▁stated ▁above , ▁Bal an is ' s ▁third ▁edition ▁An ten na ▁Theory ▁text book . ▁ ▁See ▁also ▁ ▁B ist atic ▁rad ar ▁ ▁References ▁ ▁External ▁links ▁ ▁Category : Phys ical ▁par ado xes ▁Category : Diff raction ▁Category : Ant enn as ▁( radio ) <0x0A> </s> ▁Fle isher ▁Y arn ▁began ▁as ▁an ▁amateur ▁company ▁s occer ▁club ▁of ▁the ▁S B ▁& ▁B W ▁Fle isher ▁Man ufact uring ▁Company ▁in ▁Philadelphia ▁and ▁quickly ▁became ▁a ▁national ▁amateur ▁s occer ▁power . ▁They ▁won ▁the ▁Philadelphia ▁Indust rial ▁League ▁championship ▁in ▁ 1 9 2 0 / 2 1 , ▁both ▁the ▁Al lied ▁Am ateur ▁Cup ▁of ▁Philadelphia ▁and ▁Philadelphia ' s ▁Te legraph ▁Cup ▁in ▁ 1 9 2 2 , ▁a ▁" quad ru ple " ▁in ▁ 1 9 2 3 ▁winning ▁the ▁Al lied ▁Am ateur ▁League , ▁the