A multi-band antenna includes a reflector that provides a ground plane, a first array of first radiating elements, each of the first radiating elements located on a front side of the reflector and configured to emit first electromagnetic radiation in a low frequency band, a second array of second radiating elements, each of the second radiating elements located on the front side of the reflector and configured to emit second electromagnetic radiation in a high frequency band, and an artificial magnetic conductor (AMC) plane that is located between the reflector and a radiator of the first radiating element and between the reflector and a radiator of the second radiating element. The AMC plane is configured to reflect the first electromagnetic radiation substantially in phase and to reflect the second electromagnetic radiation substantially in antiphase.

A multi-band antenna includes a reflector that provides a ground plane, a first array of first radiating elements, each of the first radiating elements located on a front side of the reflector and configured to emit first electromagnetic radiation in a low frequency band, a second array of second radiating elements, each of the second radiating elements located on the front side of the reflector and configured to emit second electromagnetic radiation in a high frequency band, and an artificial magnetic conductor (AMC) plane that is located between the reflector and a radiator of the first radiating element and between the reflector and a radiator of the second radiating element. The AMC plane is configured to reflect the first electromagnetic radiation substantially in phase and to reflect the second electromagnetic radiation substantially in antiphase.

An antenna module includes a first radiator, a ground plane and a second radiator. The first radiator includes a first section and a second section. The first section includes a first end and a second end. The first end is a feeding end, and the second end is connected to the second section. The first section includes first parts bent back and forth along a first direction, the second section includes second parts bent back and forth along a second direction, and an included angle formed between the first direction and the second direction is 60 degrees to 120 degrees. The ground plane is disposed beside the first section of the first radiator. An end of the second radiator is connected to the feeding end of the first radiator, and the other end of the second radiator is vertically connected to the ground plane.

An antenna module includes a first radiator, a ground plane and a second radiator. The first radiator includes a first section and a second section. The first section includes a first end and a second end. The first end is a feeding end, and the second end is connected to the second section. The first section includes first parts bent back and forth along a first direction, the second section includes second parts bent back and forth along a second direction, and an included angle formed between the first direction and the second direction is 60 degrees to 120 degrees. The ground plane is disposed beside the first section of the first radiator. An end of the second radiator is connected to the feeding end of the first radiator, and the other end of the second radiator is vertically connected to the ground plane.

Stub conductors are disposed so as to surround an outer periphery of a patch conductor and be spaced from the patch conductor with a gap positioned between the stub conductors and the patch conductor.

A mobile computing device including a modal antenna is disclosed. The mobile computing device may include a radio frequency circuit and a modal antenna mechanically coupled to a portion of the mobile computing at a location that is remote from the radio frequency circuit. The modal antenna may include a driven element and a parasitic element positioned proximate to the driven element. The modal antenna may be operable in a plurality of different modes. Each mode may be associated with a different radiation pattern. The mobile computing device may include a transmission line coupling the radio frequency circuit to the modal antenna. The radio frequency circuit may be configured to transmit an RF signal over the transmission line to the modal antenna and configured to communicate a control signal to adjust the mode of the modal antenna over the transmission line.

A dual band antenna and an electronic device are provided. The dual band antenna includes a feed end, an annular connection end, a metal screw, a first extension path, a second extension path, a third extension path, and a grounding part. The annular connection end has an opening and is connected to the feed end. The metal screw has a threaded stud passing through the opening, so that the metal screw is electrically connected to the annular connection end. The feed end, the first extension path, the second extension path, the third extension path, and the grounding part are sequentially connected to each other. The dual band antenna is configured to have a monopole antenna and a loop antenna, so that the dual band antenna has a wide operating frequency band, and the monopole antenna operates at 3.6 GHz and the loop antenna operates at 4.6 GHz.

An antenna module radiates radio waves upon receiving a radio-frequency signal output from an RFIC. The antenna module includes flat radiating elements that radiate radio waves in a first polarization direction, feed conductors that each supply a radio-frequency signal from the RFIC to an associated one of the radiating elements, and a ground electrode disposed opposite the radiating elements. As viewed from the RFIC, frequency characteristics of an impedance of the radiating element are different from frequency characteristics of an impedance of the radiating element. Under a condition a frequency band in which a return loss is less than or equal to a predetermined value is defined as an operable band width in each of the radiating elements, the operable band width of the radiating element partially overlaps the operable band width of the radiating element.

An antenna structure for a metal-cased wireless device which is largely impervious to interference when held in the hand includes a radiation portion, a feeding source, a first grounding portion, a second grounding portion, and a third grounding portion. The grounding portions are sequentially arranged at intervals, and all are electrically connected to the metal frame. The first end of the radiation portion is connected to the second grounding portion and the third grounding portion, the second end of the radiation portion is connected to the first grounding portion. The feeding source is electrically connected to the radiation portion and the first grounding portion and feeds current into the antenna structure. The present disclosure also provides a wireless communication device with the antenna structure.

An antenna structure for a metal-cased wireless device which is largely impervious to interference when held in the hand includes a radiation portion, a feeding source, a first grounding portion, a second grounding portion, and a third grounding portion. The grounding portions are sequentially arranged at intervals, and all are electrically connected to the metal frame. The first end of the radiation portion is connected to the second grounding portion and the third grounding portion, the second end of the radiation portion is connected to the first grounding portion. The feeding source is electrically connected to the radiation portion and the first grounding portion and feeds current into the antenna structure. The present disclosure also provides a wireless communication device with the antenna structure.