Antennaless Wireless Device
A radiating system of a wireless device transmits and receives electromagnetic wave signals in a frequency region and comprises an external port, a radiating structure, and a radiofrequency system. The radiating structure includes: a ground plane layer with a connection point; a radiation booster with a connection point and being smaller than 1/30 of a free-space wavelength corresponding to a lowest frequency of the frequency region; and an internal port between the radiation booster connection point and the ground plane layer connection point. The radiofrequency system includes: a first port connected to the radiating structure's internal port; and a second port connected to the external port. An input impedance at radiating structure's disconnected internal port has a non-zero imaginary part across the frequency region. The radiofrequency system modifies impedance of the radiating structure to provide impedance matching to the radiating system within the frequency region at the external port.
1 . A radiation booster comprising:
a volumetric geometry including a first conductive part on one surface of the radiation booster, and a second conductive part on a second surface of the radiation booster parallel to the first surface, both of the first and second conductive parts including a polygonal contour,
the second conductive part including a soldering pad connected to the first conductive part by a conductive circuit, the soldering pad and conductive circuit being located substantially close to a corner of the radiation booster,
wherein the distance between the first conductive part and the soldering pad is 5 mm or less,
wherein a longest edge of the radiation booster is shorter than 1/30 of a longest operating wavelength of a lowest operating frequency band at which the radiation booster operates,
wherein the radiation booster is configured to being mounted near an edge of a ground plane layer on a printed circuit board of a wireless device, such that a gap with no conductor is between the edge and the radiation booster and no projection of the radiation booster onto the printed circuit board intersects the ground plane, and
wherein the radiation booster is configured to be connected to a matching network, the matching network providing impedance matching in at least a first frequency region of operation, the matching network including at least three circuit components including an inductor and a capacitor.
2 . The radiation booster according to claim 1 , wherein the first frequency region includes the 824-960 MHz frequency range.
3 . The radiation booster according to claim 1 , wherein the first frequency region includes the LTE frequency band.
4 . The radiation booster according to claim 3 , wherein the LTE frequency band includes the 700 MHz frequency.
5 . The radiation booster according to claim 1 , wherein the polygonal shape is rectangular.
6 . The radiation booster according to claim 1 , wherein the radiation booster is configured to operate at a second frequency band.
7 . The radiation booster according to claim 6 , wherein the second frequency band includes the 1710-1890 MHz frequency range.