ly ▁as ▁compared ▁to ▁a ▁par abol ic ▁reflect or ▁and ▁feed horn . ▁ ▁Other ▁uses ▁In ▁a ▁related ▁application , ▁so - called ▁leak y ▁wave gu ides ▁are ▁also ▁used ▁in ▁the ▁determ ination ▁of ▁rail car ▁positions ▁in ▁certain ▁rapid ▁trans it ▁applications . ▁They ▁are ▁used ▁primarily ▁to ▁determine ▁the ▁precise ▁position ▁of ▁the ▁train ▁when ▁it ▁is ▁being ▁brought ▁to ▁a ▁halt ▁at ▁a ▁station , ▁so ▁that ▁the ▁door way ▁positions ▁will ▁align ▁correctly ▁with ▁que uing ▁points ▁on ▁the ▁platform ▁or ▁with ▁a ▁second ▁set ▁of ▁safety ▁doors ▁should ▁such ▁be ▁provided . ▁ ▁See ▁also ▁Sl otted ▁wave guide ▁Mic row ave ▁Rad i ometer ▁( J uno ) ▁( has ▁a ▁slot ▁array ▁anten na ) ▁R IM FA X ▁( rad ar ▁for ▁Mars ▁ro ver ▁has ▁slot ▁anten na ▁design ) ▁ ▁References ▁ ▁External ▁links ▁ ▁Sl otted ▁W ave guide ▁An ten nas ▁An ten na - The ory . com ▁ ▁Category : Radio ▁frequency ▁anten na ▁types ▁Category : Ant enn as ▁( radio ) ▁Category : Rad ar <0x0A> </s> ▁Y ak ky ▁Do od le ▁is ▁a ▁cart oon ▁du ck ▁created ▁by ▁H anna - Bar ber a ▁Produ ctions ▁for ▁the ▁ 1 9 6 1 ▁series ▁The ▁Y og i ▁Bear ▁Show . ▁Y ak ky ' s ▁name ▁is ▁a ▁par ody ▁of ▁" Y an kee ▁Do od le ". ▁ ▁History ▁Y ak ky ▁Do od le ▁( vo