Slot antenna
AssigneeRobert Bosch GmbH
InventorsRalf Schultze, Heinrich Wilken, Andreas Horn
Life of this patent
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Abstract
A slotted antenna can be used for operation in multiple frequency ranges. The slotted antenna has a first electrically conducting disc which is offset from an electrically conducting base area which forms a reference potential, the disc being connected at its outside edge to the base area by at least one first electrically conducting web. The first disc includes a recess. Above the recess, a second electrically conducting disc is situated and is connected at its outside edge to the first disc by at least one second electrically conducting web. An antenna conductor leads to the second disc.
Claims18
A slotted antenna (1) having a first electrically conducting disc (10) which is offset from an electrically conducting base area (5) which forms a reference potential, the disc being connected at its outside edge (15) to the base area (5) by at least one first electrically conducting web (20, 21, 22),
- wherein the first disc (10) includes a recess (25);
- a second electrically conducting disc (30) is situated above the recess (25) and is connected at its outside edge (35) to the first disc (10) by at least one second electrically conducting web (40, 41, 42);
- and an antenna conductor (45) leads to the second disc (30).
The slotted antenna (1) according to one of the preceding claims,
- wherein the first disc (10) and/or the second disc (30) is designed to be approximately oval or elliptical.
The slotted antenna (1) according to one of the preceding claims,
- wherein the first disc (10) and/or the second disc (30) is designed to be asymmetrical.
The slotted antenna (1) according to one of the preceding claims,
- wherein the first disc (10) and the second disc (30) are approximately concentric.
The slotted antenna (1) according to one of the preceding claims,
- wherein the webs (20, 21, 22, 40, 41, 42) are approximately perpendicular to the discs (10, 30) and the base area (5).
The slotted antenna (1) according to one of the preceding claims,
- wherein three webs (20, 21, 22) are situated between the first disc (10) and the base area (5), and three webs (40, 41, 42) are likewise situated between the first disc (10) and the second disc (30).
The slotted antenna (1) according to one of the preceding claims,
- wherein the slotted antenna (1) is operable at a number of different frequency ranges corresponding to the number of discs (10, 30) used, the respective operating frequency depending on the slot length at the outside edge (15, 35) of the respective disc (10, 30).
The slotted antenna (1) according to one of the preceding claims,
- wherein the slots formed by one or more adjacent webs (20, 21, 22;
- 40, 41, 42) between the base area (5) and the first disc (10) each has a length of approximately half a first operating wavelength, and the slots formed by one or more adjacent webs (40, 41, 42) between the first disc (10) and the second disc (30) each has a length of approximately half a second operating wavelength.
The slotted antenna (1) according to one of the preceding claims,
- wherein the recess (25) of the first disc (10) is arranged concentrically to the first disc (10).
The slotted antenna (1) according to one of the preceding claims,
- wherein at least one third disc (50) is provided between the first disc (10) and the second disc (30) and also includes a recess (55);
- the third disc (50) is connected to the outside edge (35) of the directly adjacent disc (30) above it by at least one third web which corresponds in particular to the at least of one second web (40, 41, 42) and is connected to the directly adjacent disc (10) beneath it by at least one fourth web (60, 61) on its own outside edge (65).
The slotted antenna (1) according to one of the preceding claims,
- wherein the diameter of a disc (10, 30) is greater, the smaller its distance from the base area (5).
Dependencies are inferred from the claim text.