The invention relates to a Global navigation satellite systems (GNSS) antenna. The invention also relates to a Global navigation satellite systems (GNSS) module comprising at least one GNSS antenna according to the invention. The invention further relates to a vehicle, such as a car, comprising at least one GNSS module to the invention.

Disclosed is an antenna impedance matching circuit, an antenna system, a printed circuit board, and a terminal. The antenna impedance matching circuit comprises: a first transmission line having a first specific length such that the first transmission line is capacitive, and a second transmission line having a second specific length such that the second transmission line is inductive. In particular, the first transmission line and the second transmission line are connected in parallel, and terminals of the first transmission line and the second transmission line are open or shorted.

Disclosed is an antenna impedance matching circuit, an antenna system, a printed circuit board, and a terminal. The antenna impedance matching circuit comprises: a first transmission line having a first specific length such that the first transmission line is capacitive, and a second transmission line having a second specific length such that the second transmission line is inductive. In particular, the first transmission line and the second transmission line are connected in parallel, and terminals of the first transmission line and the second transmission line are open or shorted.

Apparatuses and methods are provided that are directed to detecting electric, magnetic, or electromagnetic fields by employing atoms excited to Rydberg states coupled to radio-frequency circuits that include waveguides.

Apparatuses and methods are provided that are directed to detecting electric, magnetic, or electromagnetic fields by employing atoms excited to Rydberg states coupled to radio-frequency circuits that include waveguides.

A multiband antenna comprises a dielectric substrate with a first surface defining an annular ledge and a central recess with a plurality of pockets. A MIMO radiator body is disposed in the central recess having a first surface defining a plurality of lobes which are disposed in respective ones of the plurality of pockets and having a second surface defining an outer rim and a central shelf A radiator ring is disposed at the annular ledge so that the radiator ring and the outer rim converge along an annular gap therebetween. A plurality of MIMO feed lines provide external connection to respective lobes. The MIMO radiator body and the radiator ring provide a substantially horizontally-directed radiation pattern (e.g., for terrestrial signals). At least one low-profile radiator on the central shelf provides a substantially circularly polarized or vertically-directed radiation pattern for receiving signals radiated from a satellite.

A multiband antenna comprises a dielectric substrate with a first surface defining an annular ledge and a central recess with a plurality of pockets. A MIMO radiator body is disposed in the central recess having a first surface defining a plurality of lobes which are disposed in respective ones of the plurality of pockets and having a second surface defining an outer rim and a central shelf A radiator ring is disposed at the annular ledge so that the radiator ring and the outer rim converge along an annular gap therebetween. A plurality of MIMO feed lines provide external connection to respective lobes. The MIMO radiator body and the radiator ring provide a substantially horizontally-directed radiation pattern (e.g., for terrestrial signals). At least one low-profile radiator on the central shelf provides a substantially circularly polarized or vertically-directed radiation pattern for receiving signals radiated from a satellite.

Embodiments of resonator circuits and modulating resonators and are described generally herein. One or more acoustic wave resonators may be coupled in series or parallel to generate tunable filters. One or more acoustic wave resonances may be modulated by one or more capacitors or tunable capacitors. One or more acoustic wave modules may also be switchable in a filter. Other embodiments may be described and claimed.

Embodiments of resonator circuits and modulating resonators and are described generally herein. One or more acoustic wave resonators may be coupled in series or parallel to generate tunable filters. One or more acoustic wave resonances may be modulated by one or more capacitors or tunable capacitors. One or more acoustic wave modules may also be switchable in a filter. Other embodiments may be described and claimed.

An electronic device according to various embodiments of the disclosure may include: a housing including a first housing and a second housing, a wireless communication circuit, and at least one contact structure comprising a conductor, wherein the first housing may include a ground and the second housing may include a conductive portion, wherein, in a first state, the second housing may be configured to move in a first direction to be changed to a second state and, in a second state, the second housing may be configured to move in a second direction to be change to the first state, and wherein, in the first state, the at least one contact structure may be configured to electrically connect the ground of the first housing to the conductive portion of the second housing, and the wireless communication circuit may be configured to receive a signal by feeding power to a point of the conductive portion of the second housing.