Radio antenna structure for radiating or receiving various frequency bands has flat main antenna with current supply on circuit board and connected to earth, with parasitic flat antenna alongside it

摘要

A circuit board (CB) carries a radio wave coupling system (KS1). A flat rectangular main antenna (MA1) is formed near one edge of the circuit board and has a current supply connection (S1) and an earth connection (G1) on one short edge. A parasitic flat antenna (PE1) is formed on the circuit board adjacent to the main antenna and forms part of the antenna structure (AS1). The parasitic flat antenna is connected to earth (G2) via a concentrated electric impedance (LP1).