| 摘要 |
An RF module having an RF antenna integrated with a RF shielding part is disclosed. The arrangement includes a tuning mechanism for tuning the RF antenna according to a Voltage Standing Wave Ratio (VSWR) specification to thereby tolerate bigger tolerances of the other components on the printed circuit board. More space on the printed circuit board is also obtained as well as avoiding RF losses in transmission lines and soldering connections to an external antenna. A metallic shield can be produced from a single metallic sheet or a molded metallized piece being formed to a desired shape, thereby forming an antenna radiator member integrated with the screening portion of the metallic shield, the antenna radiator member extending over or resting against a supporting element. The VSWR of the antenna radiator member can be tuned by twisting, rotating or shifting the supporting element, which rests on a printed circuit board underlying the antenna device and carrying the electronic components of the RF module. |
