RF signal transmission devices for a base station antenna include a printed circuit board which has a dielectric layer, a metal pattern layer on a first main surface of the dielectric layer, and a ground layer on a second main surface of the dielectric layer. The metal pattern layer has a transmission line deformation section for enhancing the ability to withstand surge current, and the ground layer comprises a groove that is configured to at least partially compensate for the change in the characteristic impedance due to the transmission line deformation section. The RF signal transmission device can achieve good characteristic impedance matching whilst enhancing the capacity to withstand surge current. In addition, the RF signal transmission device can improve PIM performance. The present disclosure also includes a phase shifter for a base station antenna and a base station antenna.

Provided is a phase transformation method performed by a phase shifter including a support frame, a plurality of phase transformation units on the support frame, an operation unit connected to the plurality of phase transformation units to synchronize phases, which are to be transformed through the plurality of phase transformation units, with each other, and a driving unit configured to operate the operation unit, wherein each of the plurality of phase transformation units includes a first circuit pattern, and a second circuit pattern connected to the first circuit pattern while a region of the second circuit pattern overlaps the first circuit pattern, and a length of the region of the second circuit pattern overlapping the first circuit pattern changes when the operation unit is operated.

A phase-shift unit includes: a first substrate and a second substrate provided opposite to each other; a medium layer provided between the first substrate and the second substrate; a microstrip line disposed at a side of the second substrate facing towards the first substrate; and a grounding layer provided at a side of the first substrate facing towards the second substrate and formed with a via hole; wherein a projection of the via hole onto the second substrate and a projection of the microstrip line onto the second substrate have an overlapped area therebetween; and wherein the via hole is configured to feed a phase-shifted microwave signal out of the phase-shift unit, or feed a microwave signal into the phase-shift unit such that the microwave signal is phase-shifted.

A phase shifter includes a radio frequency input transmission line, a radio frequency output transmission line, and a first branch and a second branch coupled in parallel between the radio frequency input transmission line and the radio frequency output transmission line, the first branch includes first switch components and first transmission lines coupled in series, and the second branch includes a second transmission line including a first terminal coupled to the radio frequency input transmission line and a second terminal, a third transmission line including a third terminal coupled to the second terminal and a fourth terminal coupled to the radio frequency output transmission line, second switch components, where one terminal of each of the second switch components is coupled to a connection node of the second transmission line and the third transmission line, and the other terminal is coupled to a corresponding grounding component.

A phase shifter and a manufacturing method thereof and an antenna and a manufacturing method thereof are provided. The phase shifter includes: first and second substrates opposite to each other; a first electrode provided on the first substrate and configured to receive a ground signal; a second electrode provided on a side of the second substrate facing towards the first substrate; liquid crystals encapsulated between the first substrate and the second substrate and driven by the first electrode and the second electrode to rotate; and a support structure provided between the first substrate and the second substrate and including a first spacer. The first spacer is located on a side of the second electrode facing away from the second substrate, and an orthographic projection of the first spacer on the second substrate is within an orthographic projection of the second electrode on the second substrate.

A transition unit of a radio frequency device provides a transition between a planar differential pair transmission line and a hollow radio frequency waveguide. A substrate layer arrangement with a planar differential pair transmission line is arranged on one or more surfaces of at least one substrate layer. An end section of the transmission line is configured as a radio frequency signal emission pattern. The transition unit has an end section of a waveguide for electromagnetic waves that is attached to the substrate layer arrangement and superposes the radio frequency signal emission pattern. The waveguide is directed perpendicular to the substrate layer arrangement. An open end of the end section of the waveguide is attached to a first outer surface or a second outer surface of the substrate layer arrangement. Opposite to the end section a back cavity is attached with an open end towards the substrate layer arrangement.

A phase shifter, a manufacture method for manufacturing a phase shifter, a drive method for driving a phase shifter, and an electronic device are provided. The phase shifter includes a dielectric substrate, and a transmission line, a dielectric layer, an insulating layer, and a metal layer on the dielectric substrate. In a direction perpendicular to a first surface of the dielectric substrate, the dielectric layer and the insulating layer are between the metal layer and the transmission line, a material of the dielectric layer is a semiconductor material; and an orthographic projection of the metal layer on the dielectric substrate, an orthographic projection of the insulating layer on the dielectric substrate, and an orthographic projection of the dielectric layer on the dielectric substrate at least partially overlap. The present disclosure provides a new phase shifter based on a metal-insulator-semiconductor capacitor structure.

The present invention relates to a cavity phase shifter with a housing having at least one cavity and a transmission line mounted in the cavity. The transmission line is provided with an input end and an output end. The output end of the transmission line is electrically connected to another transmission line outside the cavity without the aid of a cable. The cavity phase shifter also includes a movable element mounted within the cavity. Movement of the movable element is configured to adjust a phase shift experienced by an RF signal that travels between the input end and output end of the transmission line. The cavity phase shifter can be provided in a base station antenna having a reflector; a feed board mounted forwardly of the reflector; and a radiating element extending forwardly from the feed board. The phase shifter is mounted rearward of the reflector. The phase shifter includes a printed circuit board that extends perpendicularly to the feed board, and an output end of a transmission line on the printed circuit board is soldered to a trace on the feed board. Thus, the insertion loss associated with the phase cables would be reduced and the gain performance of the antenna can be improved.

A first mechanical linkage is connected between a RET actuator and a first phase shifter. A second mechanical linkage is connected between the RET actuator and a second phase shifter. The RET actuator includes a rotary drive element operably coupled to at least one drive gear for moving the at least one drive gear in a first rotary direction and a second rotary direction. A first drive system is connected to the first mechanical linkage and a second drive system is connected to the second mechanical linkage. The first drive system has a first driven gear and the second drive system has a second driven gear where the first driven gear and the second driven gear are coaxially located relative to one another. An index system selectively couples the at least a one drive gear to one of the first driven gear and the second driven gear.

A system for EMNZ metamaterial-based direct antenna modulation. The system includes a signal generator, a metamaterial switch and an antenna. The signal generator may is configured to generate a microwave signal. The metamaterial switch is configured to generate a modulated microwave signal from the microwave signal. The modulated microwave signal is generated by selectively passing the microwave signal through the metamaterial switch. The metamaterial switch includes a first conductive plate and a first loaded conductive plate. The first loaded conductive plate includes a second conductive plate and a first monolayer graphene. The first monolayer graphene includes a first tunable conductivity. The first monolayer graphene is positioned between the first conductive plate and the second conductive plate. An effective permittivity of the metamaterial switch is configured to be adjusted to a predetermined value. The effective permittivity of the metamaterial switch is adjusted responsive to tuning the first tunable conductivity.