Antenna for an RFID reader and method for identifying a roll
AssigneeSick AG
InventorFlorian Pudenz
Life of this patent
Estimating the term…
Abstract
An antenna (10) for an RFID reader, the antenna (10) comprising at least two linearly polarized individual antennas (24a-b) and a feed circuit (26) which is connected to the individual antennas (24a-b), wherein the individual antennas (24a-b) are arranged relative to one another with a tilt of an internal angle and together form a circularly polarized antenna, and wherein the antenna (10) has a free space (30) in a region of the internal angle.
Claims11
An antenna (10) for an RFID reader, the antenna (10) comprising at least two linearly polarized individual antennas (24a b) and a feed circuit (26) which is connected to the individual antennas (24a b),
- wherein the individual antennas (24a b) are arranged relative to one another with a tilt of an internal angle and together form a circularly polarized antenna,
- wherein the antenna (10) has a free space (30) in a region of the internal angle,
- and wherein the antenna (10) is arranged in an L-shaped housing (12, 22) whose legs form the internal angle.
An apparatus (100) with an RFID reader and with a holder (12, 18) for a roll (14),
- wherein the holder (12) has at least one antenna (10) which is connected to the RFID reader in order to read an RFID transponder (16) of the roll (14) held by the holder (12, 18) and thus identify the roll (14),
- wherein the antenna (10) comprises at least two linearly polarized individual antennas (24a b) and a feed circuit (26) which is connected to the individual antennas (24a b),
- wherein the individual antennas (24a b) are arranged relative to one another with a tilt of an internal angle and together form a circularly polarized antenna, and wherein the antenna (10) has a free space (30) in a region of the internal angle,
- and wherein the holder (12) with the antenna (10) occupies only a part of the circumference of the roll (14).
A method for identifying a roll (14) arranged on a mandrel (18, 36) of a holder (12, 18),
- wherein an RFID transponder (16) of the roll (14) is read by an RFID reader by means of an antenna (10) of the holder (12, 18) independently of the rotational position of the roll (14), the antenna (10) comprising at least two linearly polarized individual antennas (24a b) and a feed circuit (26) which is connected to the individual antennas (24a b),
- wherein the individual antennas (24a b) are arranged relative to one another with a tilt of an internal angle and together form a circularly polarized antenna, and wherein the antenna (10) has a free space (30) in a region of the internal angle,
- and wherein the antenna (10) is arranged in an L-shaped housing (12, 22) whose legs form the internal angle.
Dependencies are inferred from the claim text.