The present invention provides an antenna structure, including a frame body, a first feed-in part, and a first connection part, where the frame body is at least partially made of a metal material, the frame body includes a first part and a second part, the second part is connected to one end of the first part, a length of the second part is greater than a length of the first part, a first slot is provided in the first part, a second slot is provided in the second part, a part of the frame body between the first slot and the second slot forms a first radiation part, the first feed-in part is disposed on the first radiation part and located on the first part of the frame body. The antenna structure can effectively improve low band radiation performance.

One example includes a super-lattice castellated field effect transistor (SLCFET) system. The system includes a plurality of SLCFETs arranged in a series stack between a first port and a second port to provide a propagation path of a radio frequency (RF) signal between the first port and the second port in response to activation of the SLCFETs. The system also includes a plurality of gate resistors interconnecting gate terminals associated with each of the respective SLCFETs and an activation port to which an activation signal is provided to concurrently activate the SLCFETs. The system further includes a plurality of balancing resistors coupled to the gate terminals associated with each of the respective SLCFETs, the balancing resistors being configured to approximately equalize a drain-gate voltage and a gate-source voltage associated with each of the SLCFETs when activated.

One example includes a super-lattice castellated field effect transistor (SLCFET) system. The system includes a plurality of SLCFETs arranged in a series stack between a first port and a second port to provide a propagation path of a radio frequency (RF) signal between the first port and the second port in response to activation of the SLCFETs. The system also includes a plurality of gate resistors interconnecting gate terminals associated with each of the respective SLCFETs and an activation port to which an activation signal is provided to concurrently activate the SLCFETs. The system further includes a plurality of balancing resistors coupled to the gate terminals associated with each of the respective SLCFETs, the balancing resistors being configured to approximately equalize a drain-gate voltage and a gate-source voltage associated with each of the SLCFETs when activated.

A wireless device comprises a radiating system that comprises and a radiating structure that operates in at least two frequency regions. The radiating structure comprises: a ground plane layer having a first connection point; a single radiation booster having a first connection point; a radiofrequency system comprising a first input port, a plurality of external output ports, and a plurality of branches, at least some of the plurality of branches being connected to a common point connected to the first input port, wherein each of the plurality of external output ports provides operation in at least one of the at least two frequency regions of operation; and a first internal port defined between the first connection point of the radiation booster and the first connection point of the ground plane layer, the first internal port being connected to the first input port of the radiofrequency system.

A wireless device comprises a radiating system that comprises and a radiating structure that operates in at least two frequency regions. The radiating structure comprises: a ground plane layer having a first connection point; a single radiation booster having a first connection point; a radiofrequency system comprising a first input port, a plurality of external output ports, and a plurality of branches, at least some of the plurality of branches being connected to a common point connected to the first input port, wherein each of the plurality of external output ports provides operation in at least one of the at least two frequency regions of operation; and a first internal port defined between the first connection point of the radiation booster and the first connection point of the ground plane layer, the first internal port being connected to the first input port of the radiofrequency system.

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.

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.

An antenna is provided. The antenna includes a first radiator positioned at a first level and connected to a ground plane at a second level. In a top view, the first radiator has a first edge, a second edge, a third edge, a fourth edge and a first arc edge. The second edge and the third edge are connected to opposite ends of the first edge. The fourth edge is connected to an end of the third edge opposite to the first edge. The first arc edge with a first radius has opposite ends respectively connected to the second edge and the fourth edge. The first arc edge has a first arc length corresponding to a first central angle, which is less than 90 degrees.

An antenna is provided. The antenna includes a first radiator positioned at a first level and connected to a ground plane at a second level. In a top view, the first radiator has a first edge, a second edge, a third edge, a fourth edge and a first arc edge. The second edge and the third edge are connected to opposite ends of the first edge. The fourth edge is connected to an end of the third edge opposite to the first edge. The first arc edge with a first radius has opposite ends respectively connected to the second edge and the fourth edge. The first arc edge has a first arc length corresponding to a first central angle, which is less than 90 degrees.

An antenna module includes a first antenna layer, including at least one main radiation unit including at least two main radiation patches symmetrically arranged and spaced apart from each other and at least one feeder portion located at or corresponds to a gap between adjacent two of the main radiation patches; a second antenna layer, stacked with the first antenna layer and including a reference ground arranged opposite to the main radiation patches and at least one microstrip insulated from the reference ground; at least one first electrically conductive member, electrically connected to the main radiation patches and the reference ground; and at least one second electrically conductive member, with an end being electrically connected to the feeder portion and another end being electrically connected to another end of the microstrip. An end of the microstrip is electrically connected to a radio frequency transceiver chip.