Antenna arrangement
View Patent ↗An antenna arrangement comprising a multi-layer PCB ( 10 ) with a ground plane ( 20 ) in a first layer and a first antenna ( 11 ) in a second layer, and an extended ground plane ( 20 ) connected to the ground plane of the PCB. A second antenna ( 110, 120, 130, 140, 150 ) is formed integral with the extended ground plane ( 20 ). The extended ground plane is positioned opposite the first antenna.
1. A communication apparatus comprising:
a multi-layer printed circuit board comprising a ground plane;
a first antenna comprising a printed trace of conducting material integrated into the multi-layer printed circuit board and arranged at an upper portion of said communication apparatus; and
an extended ground plane positioned opposite to the first antenna and connected to the ground plane of the multi-layer printed circuit board and conforming to the shape of the first antenna, the extended ground plane and the printed circuit board being spaced apart by a distance and the extended ground plane being connected to the ground plane of the printed circuit board;
wherein
a second antenna is integrated with the extended ground plane and located at an upper portion of the extended ground plane.
2. The apparatus according to claim 1 , wherein said distance is in the range of 6-10 mm.
3. The apparatus according to claim 1 , further comprising:
a connection point of the first antenna, provided adjacent the base of the extended ground plane, and
a connection point of the second antenna, provided at an upper portion, such as above the middle of the extended ground plane as from the connection to the printed circuit board to the top thereof.
4. The apparatus according to claim 3 , wherein the connection point of the second antenna is provided at a top portion of the extended ground plane.
5. The apparatus according to claim 3 , wherein the connection point of the first antenna and the connection point of the second antenna are provided at diagonal positions of the extended ground plane.
6. The apparatus according to claim 1 , wherein the first antenna is operative in at least a first frequency band and the second antenna is operative in a second frequency band different from the first frequency band.
7. The apparatus according to claim 1 , wherein the second antenna is a notch antenna or a slot antenna.
8. The apparatus according to claim 1 , wherein the second antenna comprises a matching loop configured to match an input impedance of the second antenna to an input impedance of a circuitry to which it is connected.
9. The apparatus according to claim 8 , wherein the second antenna comprises a first and second connection point positioned at a first and a second side of the notch or slot, and a connection device being operative to inter-connect the first and second connection point thus forming together with the notch or slot the matching loop.
10. The apparatus according to claim 8 , wherein an area of the matching loop is configured to set the input impedance of the second antenna.
11. The apparatus according to claim 1 , wherein the second antenna is operative in the 1500 MHz frequency band at approximately 1575 MHz.
12. The apparatus according to claim 1 , comprising a filter tuned to pass signals received by the second antenna.
13. The apparatus according to claim 1 , wherein the second antenna is integrated with a conducting sheet of the extended ground plane.
14. The apparatus according to claim 1 , wherein the second antenna is operative in a frequency band of a global positioning system (GPS).
15. The apparatus according to claim 1 , wherein the communication apparatus is a portable radio communication equipment, a mobile radio terminal, a pager, a communicator, an electronic organizer, or a mobile telephone.