The disclosure provides a compact ultra-wideband (UWB) antenna comprising a plurality of sub-radiator segments, the plurality of sub-radiator segments being a flare section, an inductive corner section, and a rib section. The inductive corner section is configured to mount to a ground surface and connects the flare section and the inductive corner section. The UWB operates over a wide frequency range of 2-18 GHz with good impedance match, high forward gain, stable phase center, and consistent radiation performance. The UWB antenna further comprises a feed point. The feed point is configured to receive a coaxial connector. The plurality of sub-radiator segments are each optimized to propagate electromagnetic currents during specific frequency ranges within the wide frequency range of 2-18 GHz. Further, the UWB antenna can be a single monolithic material, such as a metallic aluminum.

An antenna structure and a wireless communication device having the antenna structure are provided, the antenna structure includes a metal frame, a feeding portion, a first ground portion, and a second ground portion. The metal frame defines a first gap, a second gap, and a third gap, the metal frame between the first gap and the second gap forms a first radiating portion, the metal frame between the first gap and the third gap and the metal frame on a side of the third gap cooperatively form a second radiating portion, the metal frame on a side of the second gap forms a third radiating portion. The feeding portion is connected to the first radiating portion. The first ground portion is apart from the feeding portion and connected to the first radiating portion. The second ground portion closes to the second gap and is connected to the third radiating portion.

An antenna structure and a wireless communication device having the antenna structure are provided, the antenna structure includes a metal frame, a feeding portion, a first ground portion, and a second ground portion. The metal frame defines a first gap, a second gap, and a third gap, the metal frame between the first gap and the second gap forms a first radiating portion, the metal frame between the first gap and the third gap and the metal frame on a side of the third gap cooperatively form a second radiating portion, the metal frame on a side of the second gap forms a third radiating portion. The feeding portion is connected to the first radiating portion. The first ground portion is apart from the feeding portion and connected to the first radiating portion. The second ground portion closes to the second gap and is connected to the third radiating portion.

Provided is an antenna assembly including a conductive frame, and a resonance unit. The conductive frame is divided into first and second conductive branch by a slot. The resonance unit includes first and second resonance circuits. One terminal of the second resonance circuit is grounded, and another terminal is connected to the second conductive branch. A first signal source is capable of feeing a first current signal to the first conductive branch through the first resonance circuit and the first feeding point, enabling the first conductive branch to radiate a first radio frequency signal. The second signal source is capable of feeding a second current signal to the second conductive branch through the second feeding point, enabling the second conductive branch, under a resonance of the second resonance circuit, to radiate a second radio frequency signal.

Provided is an antenna assembly including a conductive frame, and a resonance unit. The conductive frame is divided into first and second conductive branch by a slot. The resonance unit includes first and second resonance circuits. One terminal of the second resonance circuit is grounded, and another terminal is connected to the second conductive branch. A first signal source is capable of feeing a first current signal to the first conductive branch through the first resonance circuit and the first feeding point, enabling the first conductive branch to radiate a first radio frequency signal. The second signal source is capable of feeding a second current signal to the second conductive branch through the second feeding point, enabling the second conductive branch, under a resonance of the second resonance circuit, to radiate a second radio frequency signal.

This application provides a multi-band low noise amplifier, including: an input end, a first input matching network, a second input matching network, a first amplifier, and a second amplifier. The input end is coupled to an antenna and is configured to receive an inter-band carrier aggregation signal, where the inter-band carrier aggregation signal includes a first carrier signal located in a first band and a second carrier signal located in a second band, and the first band is different from and does not overlap the second band. The first input matching network is coupled between the input end and the first amplifier and is configured to perform impedance matching for the first carrier signal. The second input matching network is coupled between the input end and the second amplifier and is configured to perform impedance matching for the second carrier signal.

This application provides a multi-band low noise amplifier, including: an input end, a first input matching network, a second input matching network, a first amplifier, and a second amplifier. The input end is coupled to an antenna and is configured to receive an inter-band carrier aggregation signal, where the inter-band carrier aggregation signal includes a first carrier signal located in a first band and a second carrier signal located in a second band, and the first band is different from and does not overlap the second band. The first input matching network is coupled between the input end and the first amplifier and is configured to perform impedance matching for the first carrier signal. The second input matching network is coupled between the input end and the second amplifier and is configured to perform impedance matching for the second carrier signal.

A user equipment (UE) is provided that includes an antenna switch array for demultiplexing a reference signal sequentially to each antenna in a plurality of antennas. While the antenna switch array selects an antenna, the UE measures a reflection coefficient for the antenna. The UE then tunes the antenna responsive to the reflection coefficient measurement.

A user equipment (UE) is provided that includes an antenna switch array for demultiplexing a reference signal sequentially to each antenna in a plurality of antennas. While the antenna switch array selects an antenna, the UE measures a reflection coefficient for the antenna. The UE then tunes the antenna responsive to the reflection coefficient measurement.

An antenna includes a reflector, a radiating element extending forwardly of the reflector, and a director positioned forwardly of the radiating element. The director includes a plurality of passive impedance elements that provide frequency-dependent reactances to currents induced therein responsive to electromagnetic radiation generated by the radiating element. The plurality of passive impedance elements include: (i) a primary capacitive element, (ii) a first series LC circuit having a first inductor therein electrically connected to a first portion of the primary capacitive element, and (iii) a second series LC circuit having a second inductor therein electrically connected to a second portion of the primary capacitive element.