Patch antenna with switchable reactive components for multiple frequency use in mobile communications
AssigneeKoninklijke Philips Electronics N.V.
InventorAntonius Johannes Matheus De Graauw
Life of this patent
Estimating the term…
Abstract
The apparatus (100) comprises a printed circuit board (20) on which an antenna device (10) is present. The antenna (2) of the antenna device (10) can be tuned by means of matching bridges (34, 37), each of which comprise a reactive component (3,4) and a switch (25, 26). Preferably, the switches (25,26) are located outside the antenna device (10) such that a standardized antenna device (10) can be used.
Claims12
An apparatus (100) with a radio communication function, comprising a carrier (20) having a first (28) and an opposite, second side (29) and provided with a ground conductor (21), at which first side (28) an antenna device (10,50) is present, which antenna device (10,50) comprises a substrate (1) having a first (8) and an opposite, second side (9) and an antenna (2), present at the first side (8) of the substrate (1) and having an input impedance, the apparatus (100) further comprising means for tuning said input impedance, characterized in that said means comprise a first and a second matching bridge (34, 37) that comprise a reactive component (3,4) and a switch (25, 26), and that are connected between the antenna (2) and the ground conductor (21).
An apparatus (110) with a radio communication function, comprising a carrier (20) with a first (28) and an opposite, second side (29) and provided with a ground conductor (21), at which first side (28) an antenna device (10,50) is present, which antenna device (10,50) comprises a substrate (1) having a first (8) and an opposite, second side (9) and an antenna (2) present at the first side (8) of the substrate (1) and having an input impedance, the apparatus (110) further including means for tuning said input impedance, wherein said means comprise a first and a second matching bridge (34,37). that are electrically connected to the antenna (2) and are provided with a reactive component (3,4), and at least one of said bridges (34,37) is electrically connected to the ground conductor (21).
A method of tuning an antenna (2) of an apparatus (100) with a radio communication function, which apparatus (100) comprises:
- a carrier (20) with a ground conductor (21),
- an antenna device (10,50) comprising a substrate (1) and the antenna (2), and
- a first and a second matching bridge (34,37) between at least one point (32,33) on the antenna (2) and at least one point on the ground conductor (21), each of said matching bridges (34,37) comprising a reactive component (3,4) and a switch (25,26)
- which method comprises the steps of:
- measuring an input impedance of the antenna (2);
- and
- adapting the input impedance of the antenna (2) by switching at least one of said switches (25,26) on or off.
Dependencies are inferred from the claim text.