An antenna device includes: a ground plane having an edge; a matching circuit; and a T-shaped antenna element including a first element and a second element extending from a feed point to a first and second end parts. The first element has a resonance frequency that is higher than a first frequency. The second element has a resonance frequency between a second frequency and a third frequency. A first value obtained by dividing a length from a corresponding point to a first bend part by the first wavelength is less than or equal to a second value obtained by dividing a length from the corresponding point to a second bend part by the second wavelength. An imaginary component of an impedance of the matching circuit takes a positive value at the first frequency and the second frequency and takes a negative value at the third frequency.

An antenna system is provided. The antenna system includes a first metal radiator, a second metal radiator, a first matching network, a second matching network, a first radio frequency path, and a second radio frequency path, wherein a tail end of the first metal radiator is connected with a first feed point of the antenna system and the first feed point is connected with the first radio frequency path through the first matching network; and a tail end of the second metal radiator is connected with a second feed point of the antenna system and the second feed point is connected with the second radio frequency path through the second matching network. A terminal including the antenna system is also provided.

A low profile phased array antenna that is configured to be manufactured using additive manufacturing techniques is provided. In one or more embodiments, the phased array can include a plurality of signal ears, ground ears, and clustered pillars that can be arranged in relation to a base plate such that each component of the antenna can be manufactured from a single piece of material, thereby allowing for the use of additive manufacturing techniques which can substantially reduce the cost and time of the manufacturing process. The phased array can include a signal ear that include one or more posts that interface with an airgap located within a base plate of the array, wherein the size of the airgap in relation to the size of the post is configured to achieve an optimal level of impedance matching.

An antenna structure includes a metal frame. The metal frame includes a first gap, a second gap, a third gap, and a fourth gap to separate a first antenna, a second antenna, a third antenna, and a fourth antenna from the metal frame. The metal frame includes a fifth antenna. The first antenna, the second antenna, the third antenna, and the fourth antenna cooperatively form a first multiple-input multiple-output (MIMO) antenna to provide a 44 multiple-input multiple-output function in a second frequency band. The first antenna, the second antenna, the third antenna, and the fifth antenna cooperatively form a second MIMO antenna to provide a 44 multiple-input multiple-output function in a third frequency band. The first antenna and the third antenna cooperatively form a third MIMO antenna to provide a 22 multiple-input multiple-output function in a first frequency band.

An antenna structure includes a metal frame. The metal frame includes a first gap, a second gap, a third gap, and a fourth gap to separate a first antenna, a second antenna, a third antenna, and a fourth antenna from the metal frame. The metal frame includes a fifth antenna. The first antenna, the second antenna, the third antenna, and the fourth antenna cooperatively form a first multiple-input multiple-output (MIMO) antenna to provide a 44 multiple-input multiple-output function in a second frequency band. The first antenna, the second antenna, the third antenna, and the fifth antenna cooperatively form a second MIMO antenna to provide a 44 multiple-input multiple-output function in a third frequency band. The first antenna and the third antenna cooperatively form a third MIMO antenna to provide a 22 multiple-input multiple-output function in a first frequency band.

There is disclosed a multi-band reconfigurable antenna device having at least one radiating element. The radiating element is connected to a single port by way of at least first and second matching circuits arranged in parallel. A high pass filter is provided between the first matching circuit and the radiating element so as to allow passage of a first, higher frequency RF signal through the first matching circuit. A low pass filter is provided between the second matching circuit and the at least one radiating element so as to allow passage of a second, lower frequency RF signal through the second matching circuit. The high pass filter blocks passage of the second, lower frequency RF signal through the first matching circuit, and the low pass filter blocks passage of the first, higher frequency RF signal through the second matching circuit. The first and second matching circuits are adjustable independently of each other so as to allow the first and second RF signals to be tuned independently of each other.

There is disclosed a multi-band reconfigurable antenna device having at least one radiating element. The radiating element is connected to a single port by way of at least first and second matching circuits arranged in parallel. A high pass filter is provided between the first matching circuit and the radiating element so as to allow passage of a first, higher frequency RF signal through the first matching circuit. A low pass filter is provided between the second matching circuit and the at least one radiating element so as to allow passage of a second, lower frequency RF signal through the second matching circuit. The high pass filter blocks passage of the second, lower frequency RF signal through the first matching circuit, and the low pass filter blocks passage of the first, higher frequency RF signal through the second matching circuit. The first and second matching circuits are adjustable independently of each other so as to allow the first and second RF signals to be tuned independently of each other.

A hearing device adapted to be worn by a wearer comprises a shell configured for placement on an exterior surface of an ear of the wearer. The shell comprises a first end, a second end, a bottom, a top, and opposing sides, wherein the bottom, top, and opposing sides extend between the first and second ends. Circuitry is provided within the shell comprising at least a microphone, signal processing circuitry, radio circuitry, and a power source. A folded antenna is coupled to the radio circuitry and extends longitudinally along one of the bottom and the top and along the opposing sides between the first and second ends. The folded antenna encompasses at least some of the circuitry and forms an elongated gap between the opposing sides. The elongated gap faces the other of the bottom and the top.

A hearing device adapted to be worn by a wearer comprises a shell configured for placement on an exterior surface of an ear of the wearer. The shell comprises a first end, a second end, a bottom, a top, and opposing sides, wherein the bottom, top, and opposing sides extend between the first and second ends. Circuitry is provided within the shell comprising at least a microphone, signal processing circuitry, radio circuitry, and a power source. A folded antenna is coupled to the radio circuitry and extends longitudinally along one of the bottom and the top and along the opposing sides between the first and second ends. The folded antenna encompasses at least some of the circuitry and forms an elongated gap between the opposing sides. The elongated gap faces the other of the bottom and the top.

A composite right/left-handed transmission line antenna includes a first radiator, a second radiator, and a capacitive matching circuit, where the first radiator is connected to the second radiator, the connected first radiator and second radiator are of a ring shape, and the matching circuit is connected to a feed-in point of the first radiator or the second radiator.