Methods and devices to address antenna termination in absence of power supplies within an electronic circuit including a termination circuit and a switching circuit. The devices include regular NMOS devices that decouple the antenna from the switching circuit in absence of power supplies while the antenna is coupled to a terminating impedance having a desired impedance value through a native NMOS device. The antenna is coupled with the switching circuit via the regular NMOS device during powered conditions while the antenna is decoupled from the terminating impedance.

Methods and devices to address antenna termination in absence of power supplies within an electronic circuit including a termination circuit and a switching circuit. The devices include regular NMOS devices that decouple the antenna from the switching circuit in absence of power supplies while the antenna is coupled to a terminating impedance having a desired impedance value through a native NMOS device. The antenna is coupled with the switching circuit via the regular NMOS device during powered conditions while the antenna is decoupled from the terminating impedance.

An antenna assembly and a mobile terminal include a first grounding part and a second grounding part and a slot, the first grounding part and the second grounding part are separated by the slot; at least a part of a first feed line is located in the slot or is located in a directly opposite position of the slot, the first feed line is configured to feed the first grounding part and electrically connected to the first grounding part; at least a part of a second feed line is located in the slot or is located in a directly opposite position of the slot, the second feed line is configured to feed one of the first grounding part and the second grounding part, and electrically connected to the other of the first grounding part and the second grounding part.

An antenna assembly and a mobile terminal include a first grounding part and a second grounding part and a slot, the first grounding part and the second grounding part are separated by the slot; at least a part of a first feed line is located in the slot or is located in a directly opposite position of the slot, the first feed line is configured to feed the first grounding part and electrically connected to the first grounding part; at least a part of a second feed line is located in the slot or is located in a directly opposite position of the slot, the second feed line is configured to feed one of the first grounding part and the second grounding part, and electrically connected to the other of the first grounding part and the second grounding part.

An antenna device includes a ground plate which is a flat plate-shaped conductor member, an opposing conductive plate which is a flat plate-shaped conductor member installed at a predetermined distance from the ground plate and is electrically connected to a power supply line, and a plurality of short-circuit pins for electrically connecting the opposing conductive plate and the ground plate. One end of a plurality of short-circuit pins extends to a conductive plate plane, which is a plane including the opposing conductive plate, and the other end of the plurality of short-circuit pins extends to the ground plate plane, which is a plane including the ground plate. One or more of the plurality of short-circuit pins connect the opposing conductive plate and the ground plate.

A radio-frequency device comprising (1) a ceramic component that forms a hole and (2) a connector coupled to the ceramic component, wherein the connector comprises an electrically conductive pin that at least partially extends into the hole formed in the ceramic component. Various other apparatuses, systems, and methods are also disclosed.

A radio-frequency device comprising (1) a ceramic component that forms a hole and (2) a connector coupled to the ceramic component, wherein the connector comprises an electrically conductive pin that at least partially extends into the hole formed in the ceramic component. Various other apparatuses, systems, and methods are also disclosed.

A filter circuit includes a plurality of first resonators provided in a series arm, a plurality of second resonators provided in a parallel arm, and at least one or more third resonators that are electrically connected in series with each other and are electrically connected in parallel with the first resonators in the series arm. An anti-resonant frequency of the third resonators is lower than an anti-resonant frequency of the second resonators. A combined capacitance of the at least one or more third resonators electrically connected in series with each other is smaller than an electrostatic capacitance of the second resonators.

A filter circuit includes a plurality of first resonators provided in a series arm, a plurality of second resonators provided in a parallel arm, and at least one or more third resonators that are electrically connected in series with each other and are electrically connected in parallel with the first resonators in the series arm. An anti-resonant frequency of the third resonators is lower than an anti-resonant frequency of the second resonators. A combined capacitance of the at least one or more third resonators electrically connected in series with each other is smaller than an electrostatic capacitance of the second resonators.

Provided is an antenna system mounted on a vehicle according to the present invention. The antenna system comprises: a first printed circuit board (PCB) having a metal pattern and a dielectric region; a second PCB on which a plurality of antennas are disposed; and a slot antenna configured to radiate a signal through a slot region formed adjacent to a junction portion of the first PCB and the second PCB.