Antennaless wireless device capable of operation in multiple frequency regions
The present invention refers to an antenna less wireless handheld or portable device comprising a communication module including a radiating system capable of transmitting and receiving electromagnetic wave signals in a first frequency region and in a second frequency region, wherein the highest frequency of the first frequency region is lower than the lowest frequency of the second frequency region. The radiating system comprising a radiating structure and at least one internal port, wherein the input impedance of the radiating structure at the/each internal port when disconnected from the radiofrequency system has an imaginary part not equal to zero for any frequency of the first frequency region; and wherein said radiofrequency system modifies the impedance of the radiating structure, providing impedance matching to the radiating system in the at least two frequency regions of operation of the radiating system.
1. A radiation booster system for a radiating structure of a radiating system, comprising:
a first radiation booster including a first connection point coupled to a first connection point of a ground plane layer of the radiating system via a first internal port, the first radiation booster coupling electromagnetic energy to and from the ground plane layer; and
a second radiation booster including a second connection point coupled to a second connection point of the ground plane layer via a second internal port, the second radiation booster coupling electromagnetic energy to and from the ground plane layer;
wherein the radiating system further comprises a radiofrequency system and at least two external ports, and
wherein at least one of the first and second radiation boosters has a maximum dimension smaller than 1/30 times the free-space wavelength corresponding to a lowest frequency of operation of the radiating system.
2. The radiation booster system of claim 1 , wherein the first and second radiation boosters have a maximum dimension smaller than 1/30 times the free-space wavelength corresponding to the lowest frequency of operation.
3. The radiation booster system of claim 1 , wherein an orthogonal projection of at least one of the first and second radiation boosters onto a plane of the ground plane layer overlaps the ground plane layer.
4. The radiation booster system of claim 3 , wherein an orthogonal projection of at least one of the first and second radiation boosters onto a plane of the ground plane layer completely overlaps the ground plane layer.
5. The radiation booster system of claim 3 , wherein an orthogonal projection of at least one of the first and second radiation boosters onto a plane of the ground plane layer partially overlaps the ground plane layer.
6. The radiation booster system of claim 3 , wherein at least a portion of the ground plane layer is removed from the orthogonal projection that overlaps the ground plane layer.
7. The radiation booster system of claim 1 , wherein the first radiation booster comprises a gap delimited by one or more segments defining a curve, and wherein the first connection point of the first radiation booster is located at a first point along the curve and wherein the first connection point of the ground plane layer is located at a second point along the curve, the second point being different from the first point.
8. The radiation booster system of claim 1 , wherein the first radiation booster comprises a conductive part and the second radiation booster comprises a gap defined in the ground plane layer.
9. The radiation booster system of claim 1 , wherein the first radiation booster comprises a first conductive part and the second radiation booster comprises a second conductive part.
10. The radiation booster system of claim 1 , wherein the first radiation booster is located close to an edge of the ground plane layer, the edge being in common with a side of a ground plane rectangle defined as the minimum-sized rectangle that encompasses the ground plane layer.
11. The radiation booster system of claim 10 , wherein at least one of the first and second radiation boosters is located close to an end of the ground plane layer edge.
12. The radiation booster system of claim 10 , wherein at least one of the first and second radiation boosters is located close to a middle point of the edge of the ground plane layer.
13. The radiation booster system of claim 1 , wherein the first and second radiation boosters are arranged one on top of the other.
14. A radiation booster system for a radiating structure of a radiating system, comprising:
a first radiation booster including a first connection point coupled to a first connection point of a ground plane layer of the radiating system via a first internal port, the first radiation booster coupling electromagnetic energy to and from the ground plane layer; and
a second radiation booster including a second connection point coupled to a second connection point of the ground plane layer via a second internal port, the second radiation booster coupling electromagnetic energy to and from the ground plane layer;
wherein the radiating system further comprises a radiofrequency system and at least two external ports, and
wherein the first radiation booster has an orthogonal projection on a plane of the ground plane layer that is completely within an orthogonal projection of the second radiation booster on the plane of the ground plane layer.
15. The radiation booster system of claim 14 , wherein the orthogonal projection of the first and second radiation boosters on the plane of the ground plane layer is completely inside the perimeter of a ground plane rectangle defined as the minimum-sized rectangle that encompasses the ground plane layer.
16. The radiation booster system of claim 14 , wherein the first radiation booster comprises a gap in the ground plane layer, the gap delimited by one or more segments defining a curve, and wherein the first connection point of the first radiation booster is located at a first point along the curve and wherein the first connection point of the ground plane layer is located at a second point along the curve, the second point being different from the first point.
17. The radiation booster system of claim 14 , wherein the first radiation booster is configured for operating at a first frequency region and the second radiation booster is configured for operation at a second frequency region different from the first frequency region.