Dual-band emission/reception device for transmitting signals in e.g. wireless fidelity frequency band, has connection line with adaptation element comprising resonant circuit in frequency band and having capacitive impedance

摘要

The device has a printed inverted-F antenna (1) tuned on an intermediate frequency between a frequency band and another frequency band. The antenna has a common point (2) connected to an input/output terminal (3) by a connection line (4) and to another input/output terminal (5) by another connection line (6). The former line has an adaptation element (7) comprising a resonant circuit (8) in the former band and having an overall inductive impedance. The latter line has an adaptation element (12) comprising a resonant circuit (13) in the latter band and having an overall capacitive impedance.