inverted antenna inverted antenna type antenna wireless communication consists antenna running parallel ground plane grounded end antenna fed intermediate point distance grounded end design advantages simple antenna shorter compact matching controlled designer need matching components inverted antenna conceived 1950s bent wire antenna widespread use inverted antenna mobile wireless devices space saving properties printed format widely technology allows printed components manufactured printed circuit board mount components variant patch antenna variants forms inverted exist implement multi band antennae techniques include coupled addition slots evolution history inverted antenna evolution basic quarter wave antenna wire type antenna invented 1940s antenna feed connected intermediate point length antenna instead base base connected ground advantage input antenna dependent distance feed point grounded end portion antenna ground plane essentially short circuit designer match antenna system setting position feed point systems commonly system inverted antenna antenna bent run parallel ground plane advantage shorter length disadvantage low typically inverted antenna combines advantages antennae inverted matching capability type inverted antenna proposed group harvard led king antenna wire form intended use missiles implementation inverted antenna wireless implemented format format choice modern electronics implement required distributed element components filters time economical mass production methods printed circuit boards printed inverted antenna implemented classic inverted shape usually circuit board ground plane removed underneath antenna approach modified patch antenna patch antenna approach edge patch intermediate point grounded grounding ground plane works principle inverted viewed sideways shape seen antenna element wide horizontal plane patch antenna wider thin line type greater radiation area like thin line type patch antenna printed printed circuit board rest commonly printed board fixed main board antenna suspended effectively air greater distance ground plane suitable material performance term reserved authors patch antenna antenna element wide ground plane underneath thin line type inverted antennae ground plane like called format author type printed inverted antenna reserve patch type hall common configuration patch antenna place pin close corner possible feed pin relatively close pin configuration frequency given approximately formula frequency width breadth patch speed light constant substrate formula holds antenna affected nearby device variation encountered inverted antenna insufficient board space extend antenna required length antenna reduce height retaining designed electrical length compared antenna found rubber antenna inverted antennae narrow wider achieved antenna increases radiation resistance solution place antennae close proximity works coupled wider techniques producing multi band antennae effective multi band antennae need multi band antennae arises mobile devices need countries networks frequency bands different simple design reported nest patch antennae inside technique insert spur lines patch effect coupled band techniques rely multiple modes generated makes compact design examples slot pattern similar pattern filter tightly pattern shown respectively applications inverted antennae widely compact hand held wireless devices space premium includes mobile phones tablet computers wireless inverted antenna frequently internal antenna mobile phone designs antennae use vehicle vehicle manufacturers like use antennae follow vehicle style aerodynamic reasons combine antennae feeds mobile phone satellite navigation car radio shaped dual band proposed use military vehicles bands covered frequencies ratio mobile phone bands design application dimensions scaled suit
Inverted-F antenna