A non-contact communication apparatus 100 includes an antenna resonant unit 110 and an antenna drive unit 130. In the antenna drive unit 130, for example, a measurement unit consisting of an differential amplifier A3 measures an output current from an oscillation unit 131. A control unit 140 detects a minimum value or maximum value of the output current. The resonant frequency is controlled by the use of an optimal control value corresponding to the minimum value or maximum value. Therefore, even if the resonant frequency fluctuates due to variations in antenna characteristics in manufacture or a usage environment or aging, satisfactory communication characteristics at a set resonant frequency can be obtained.

An antenna system includes a first transformer, a first transceiver, a first switch, a second switch and an antenna. The first transformer includes a primary winding, and a secondary winding. The primary winding includes a first terminal and a second terminal, and the secondary winding includes a first terminal and a second terminal. The first transceiver is coupled to the first terminal of the primary winding of the first transformer. The first switch is coupled between the first terminal of the secondary winding of the first transformer and a ground. The second switch is coupled between the second terminal of the secondary winding of the first transformer and the ground. The antenna is coupled to the first terminal and the second terminal of the secondary winding of the first transformer. The antenna is a differential antenna.

An antenna system includes a first transformer, a first transceiver, a first switch, a second switch and an antenna. The first transformer includes a primary winding, and a secondary winding. The primary winding includes a first terminal and a second terminal, and the secondary winding includes a first terminal and a second terminal. The first transceiver is coupled to the first terminal of the primary winding of the first transformer. The first switch is coupled between the first terminal of the secondary winding of the first transformer and a ground. The second switch is coupled between the second terminal of the secondary winding of the first transformer and the ground. The antenna is coupled to the first terminal and the second terminal of the secondary winding of the first transformer. The antenna is a differential antenna.

An ultra-wide band dipole antenna assembly for transmitting or receiving electromagnetic signals is disclosed herein. The antenna assembly comprises a dipole antenna element and coplanar waveguide feeding network. The dipole antenna delivers the ultra-wide band matching through a pre-determined arrangement after the coplanar waveguide feeding network is applied.

An ultra-wide band dipole antenna assembly for transmitting or receiving electromagnetic signals is disclosed herein. The antenna assembly comprises a dipole antenna element and coplanar waveguide feeding network. The dipole antenna delivers the ultra-wide band matching through a pre-determined arrangement after the coplanar waveguide feeding network is applied.

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.

An antenna apparatus includes a radiation shield between an antenna element and at least one radio frequency integrated circuit (RFIC) coupled to the antenna element. An antenna substrate includes a first dielectric layer having opposite first and second surfaces, and a first metallization layer attached to the second surface to form a ground plane. A base substrate includes at least one second dielectric layer having opposite third and fourth surfaces, and a second metallization layer having a first side attached to the third surface and a second side attached to the first metallization layer to form the radiation shield. The RFIC is RF coupled to the antenna element through at least one via extending through the base substrate and a coupling element within aligned openings of the first and second metallization layers.

The disclosure provides a low band antenna device, arranged on a folding screen electronic device, and the folding screen electronic device includes a first casing and a second casing that are foldable. A first antenna and a second antenna are located on the first casing and separated, and a third antenna and a fourth antenna are located on the second casing and separated. The first antenna corresponds to the fourth antenna, and the second antenna corresponds to the third antenna. When the folding screen electronic device is in an open mode, the first through forth antennas all maintain a normal working state. When the folding screen electronic device is in a close mode, one of the first antenna and the fourth antenna and one of the second antenna and the third antenna maintain the normal working state, and the remaining antennas are in a detuned and disabled state.

A method of selecting an antenna beam includes: selecting a beam port of a first phase progression matrix having a first subset of antenna ports terminated in respective first characteristic impedances; selecting a beam port of a second phase progression matrix that is separate from the first phase progression matrix and has a second subset of antenna ports terminated in respective second characteristic impedances; and at least one of: combining a first receive signal portion from the selected beam port of the first phase progression matrix and a second receive signal portion from the selected beam port of the second phase progression matrix, or providing a first portion of a transmit signal to the selected beam port of the first phase progression matrix and a second portion of the transmit signal to the selected beam port of the second phase progression matrix.