Wireless device capable of multiband MIMO operation

摘要

A wireless handheld or portable device capable of multiband MIMO operation comprising a communication module including at least one MIMO system, wherein the at least one MIMO system comprises at least two radiating systems capable of transmitting and receiving electromagnetic wave signals, wherein at least two of the radiating systems are capable of transmitting and receiving electromagnetic wave signals in at least a first frequency band, and wherein at least two of the radiating systems are capable of transmitting and receiving electromagnetic wave signals in at least a second frequency band. The MIMO system further comprises a MIMO module arranged for processing the electromagnetic wave signals. At least one of the radiating systems includes a radiating structure comprising a ground plane (157) capable of supporting at least one radiation mode, and a radiation booster (151a-b, 152, 153) arranged to couple electromagnetic energy from/to the ground plane.

主权项

1. A wireless handheld or portable device capable of multiband MIMO operation comprising a MIMO system comprising:
at least two radiating systems capable of transmitting and receiving electromagnetic wave signals; and a MIMO module configured to process the electromagnetic wave signals transmitted and received by the at least two radiating systems, the MIMO module including at least two MIMO internal ports, wherein: at least two of the radiating systems are capable of transmitting and receiving electromagnetic wave signals in at least a first frequency band; at least two of the radiating systems are capable of transmitting and receiving electromagnetic wave signals in at least a second frequency band; each of the radiating systems comprises at least one external port connected to a respective one of the MIMO internal ports; and at least one of the radiating systems includes a radiating structure comprises:
a ground plane having a maximum length larger than 0.1λ and smaller than 1.5λ, where λ is the wavelength at a frequency within the first frequency band of operation, the first frequency band of operation being lower than the second frequency band of operation, the ground plane including a connection point;a radiation booster configured to couple electromagnetic energy from/to the ground plane, the radiation booster including a connection point;an internal port defined between the connection point of the radiation booster and the connection point of the ground plane; anda radiofrequency system comprising a port connected to a corresponding external port of the radiating system and a port connected to the internal port of the radiating structure, wherein:an input impedance of the radiating structure measured at its internal port when disconnected from the radiofrequency system has an non-zero imaginary part for any frequency of frequency bands of operation associated with the internal port;the radiofrequency system is configured to modify the impedance of the radiating structure to provide operation in the frequency bands associated with the internal port; andan imaginary area enclosing the radiation booster has a maximum size of less than 1/30 of the free-space operating wavelength at a lowest frequency band of operation associated with the internal port.