Antenna with divided ground plane
View Patent ↗A removable jacket for a modular communicator, including a connector for connecting the jacket to a modular communicator that includes an antenna and a ground plane for the antenna, wherein the jacket may be conveniently attached to and detached from the communicator, an extended ground plane for the antenna, and at least one ground contact, for connecting the extended ground plane to the ground plane of the communicator, wherein the ground plane of the communicator is too short for the antenna to resonate at a desired frequency, but the ground plane of the communicator when connected with the extended ground plane, provides a combined ground plane sufficient for the antenna to resonate at the desired frequency.
1. A removable jacket for a modular communicator, comprising:
a connector for connecting the jacket to a modular communicator that comprises an antenna and a ground plane for the antenna, wherein the jacket may be attached to and detached from the communicator;
an extended ground plane for the antenna, housed within the jacket; and
two ground contacts separated by a gap that is less than 15 mm, for connecting said extended ground plane to the ground plane of the communicator, each ground contact having a length of approximately 6 mm and a width of 2-4 mm,
wherein the ground plane of the communicator is too short for the antenna to resonate at a desired frequency, but the ground plane of the communicator when connected with said extended ground plane, provides a combined ground plane sufficient for the antenna to resonate at the desired frequency.
2. The removable jacket of claim 1 further comprising:
at least one additional extended ground plane, housed within the jacket; and
at least one additional ground contact for connecting said at least one additional extended ground plane with said extended ground plane or with the ground plane of the communicator,
wherein the ground plane of the communicator, when connected with said extended ground plane and with said at least one additional extended ground plane, provides a combined ground plane sufficient for the antenna to resonate at the desired frequency.
3. The transceiver of claim 1 wherein said ground contacts are embedded in said connector.
4. The removable jacket of claim 1 wherein said extended ground plane, when connected with the ground plane of the communicator, is oriented such that the ground plane and said extended ground plane form a dihedral angle of less than 180°.
5. The removable jacket of claim 1 wherein said extended ground plane, when connected with the ground plane of the communicator, is oriented such that the ground plane and said extended ground plane are co-planar.
6. The removable jacket of claim 1 wherein said extended ground plane is 20-100 mm long.
7. The removable jacket of claim 1 wherein the desired frequency is in the range 800 MHz-1 GHz.
8. The removable jacket of claim 1 wherein the desired frequency is in the range 1.7 GHz-2.2 GHz.