23 results about "Rf filters" patented technology

The present disclosure relates to an antenna apparatus, and especially comprises: a main body module in which a main board is mounted; an RF module which is fixed to the front so that an intermediate outside air layer is formed between the RF module and the main body module, and in which an RF filter unit and an antenna element unit are mounted; and an amplification unit module which is disposed so as to be exposed in the intermediate outside air layer between the main body module and the RF module, and comprises an amplification unit substrate having analog amplification elements mounted thereon, wherein heat generated from heating elements mounted on the main board is dissipated through at least any one of the front and back of the main body module, and heat generated from the amplification unit module is directly dissipated through the intermediate outside air layer, and thus the advantage of enabling maximum heat dissipation performance is provided.

Embodiments relate to a coaxial double motor for tuning an RF filter whose one motor is equipped with two coaxial shafts for controlling a tuning screwdriver for tightening a tuning screw of an RF filter and a nut driver for tightening a nut thereof and that is implemented to make one motor independently rotate one shaft for controlling a tuning screwdriver of an RF filter and the other shaft for controlling a nut driver thereof; and an RF filter tuning apparatus using the same and a method thereof.

In one aspect, a method comprises: comparing, in a comparator, a signal level of a receive radio frequency (RF) signal to a first threshold, the receive RF signal obtained from a controllable location in an RF front end circuit; and in response to the signal level of the receive RF signal exceeding the first threshold, causing the RF front end circuit to be reconfigured from a first mode in which an input to a low noise amplifier (LNA) is coupled an antenna to a second mode in which the input to the LNA is coupled to an RF filter.

To provide an RF filter that allows RF power to be provided to a heating element in an RF electrode without ingress.SOLUTION: A radio frequency (RF) filter includes an inductive element having a plurality of coil sections collectively forming a non-split coil of a cable of a twisted magnetic wire. The coil sections have different winding pitches. The cable of the twisted magnetic wire is configured for at least one channel, with two wires per channel. The cable of the twisted magnetic wire is connected at a first end to an electrical component that is to receive power from a power source, and the cable of the twisted magnetic wire is connected at a second end to a power source. A terminating capacitive element is electrically connected between a reference ground potential and each wire of the cable of the twisted magnetic wire at a respective location between the second end of the inductive element and the power source.SELECTED DRAWING: Figure 6

The present invention relates to an RF filter assembly for an antenna. Particularly, the RF filter assembly for an antenna comprises: a main board on which a plurality of electronic components are mounted; a plurality of RF filters which are installed on one surface of the main board; and a filter support member which is disposed between the main board and the plurality of RF filters, is made of a metal material, and separates each of the plurality of RF filters in the direction of the one surface of the main board. Thereby, the present invention provides advantages of preventing the occurrence of cracks in solder cream caused by differences in thermal expansion coefficients between the main board and each RF filter, and also, enabling a more precise RF filter arrangement, and improving product reliability.

An RF filter includes a filter housing, a plurality of hybridly coupled resonators configured in a cascade arrangement in the filter housing, a three-dimensional structure for providing inductive coupling in the RF filter. Each of the hybridly coupled resonators includes a conductive support structure extending vertically from a base of the filter housing and a folded resonator head supported on and electrically connected to the conductive support structure. The three-dimensional structure includes at least one conductive ridge extending vertically from the base of the filter housing between and electrically connected to the conductive support structures of adjacent resonators among the hybridly coupled resonators. The folded resonator head of each of the hybridly coupled resonators is configured to provide capacitive coupling in the RF filter.

An RF filter, comprising a chassis (1) that defines a cavity, and a plurality of resonators (2a, 2b) that are disposed in the cavity, wherein at least one resonator (2) comprises a body part (21) that extends in a first plane from a first end to an opposite second end along a first direction, an enlarged portion (22) that is provided at the second end and extends in the first plane along a second direction substantially perpendicular to the first direction so as to have a larger width in the second direction than the body part (21), and a folded portion (23) that is formed by bending along a lateral edge of the enlarged portion (22) at an angle of about 90° so as to extend in a second plane substantially perpendicular to the the second direction. The folded portion (23) plays a role in forming a coupling of the resonator with an adjacent resonator. The body part (21), the enlarged portion (22) and the folded portion (23) are made of a metal strip line, or a strip-line made of non-metal base with a metallized surface. The folded positions of two adjacent resonators can achieve desired coupling polarity.

This invention discloses a method for monitoring the adsorption state of an electrostatic chuck wafer, comprising the following steps: If the wafer is not adsorbed, a reference frequency is found by frequency sweeping; based on the reference frequency, several sampling capacitors are obtained by frequency sweeping, and the initial capacitance is obtained by fitting the sampling capacitors; if the wafer is adsorbed, several sampling capacitors are obtained by frequency sweeping, and the adsorbed capacitance is obtained by fitting the sampling capacitors; the adsorbed capacitance is compared with the initial capacitance to determine the wafer adsorption state. By combining automatic reference frequency optimization with graded frequency sweeping calibration, it can adapt to LC RF filters with different capacitance values ​​from a few nanofarads to thousands of nanofarads without manual parameter preset, greatly enhancing the system's versatility, stability, and long-term reliability, reducing equipment maintenance costs, effectively solving the problems of narrow measurement range and inability to resolve small changes under large base capacitance values ​​in traditional capacitance detection, and avoiding detection failures or misjudgments caused by differences in filter capacitance values.

An example cooling system for a wireless networking device is presented. The cooling system includes a Peltier cooler disposed in thermal contact with a radio-frequency (RF) filter coupled to a transceiver disposed in the wireless networking device. Further, the cooling system includes a thermal management controller coupled to the Peltier cooler and the transceiver. The thermal management controller is configured to receive a signal indicating whether the transceiver is performing a data communication. In response to determining that the transceiver is performing the data communication, the thermal management controller operates the Peltier cooler to actively cool the RF filter. However, in response to determining that the transceiver is not performing the data communication while the wireless networking device is powered on, the thermal management controller operates the Peltier cooler to stop actively cooling the RF filter.

A distribution element RF filter comprises one or more fully grounded half-wave resonators positioned between a first and a second resonator, which are electrically coupled to corresponding input / output (I / O) interfaces near corresponding ends of a dielectric substrate. Each of the one or more half-wave resonators includes a U-shaped or omega-shaped resonator section located between a first and a second end section, which are electrically connected to a base plate on a common side of the substrate. Each resonator has an electrical length that is nominally equal to half a wavelength of a center frequency of the filter. The filter may optionally include a conductive cover over the resonators.

The present invention relates to a heat dissipation module, a heat dissipation device including the heat dissipation module, an RF filter for an antenna, an antenna device, and a lighting device, and more particularly, to a heat dissipation module including a heat transfer plate main body having a refrigerant flow space as a space in which a refrigerant is filled therein and gas-liquid circulates to change the phase of the refrigerant in a closed space and release heat, wherein the refrigerant flow space includes: a first section, which is an evaporation region in which heat is received from a heat-generating body, which is a heat-dissipating target; and a second section that is a path through which a liquid refrigerant, among the refrigerants, condensed from a gas state to a liquid state flows to the first section by means of surface tension or gravity. The heat-generating body is coupled to the outside of the heat-transfer plate body corresponding to the first section in either an insertion manner or a joining manner.

The present invention relates to an RF module for an antenna, and an antenna apparatus comprising same. In particular, the RF module comprises: a unit RF filter body arranged on the front surface of a main board; a radiating element unit disposed on the front surface of the unit RF filter body; and a reflector panel which is formed to be wider than the area of the vertical cross-section of the unit RF filter body while forming the front surface of the unit RF filter body, and grounds (GND) the radiating element unit, wherein a plurality of cavities opened outward to the left and right are respectively formed on the left and right sides of the unit RF filter body, each cavity comprises a left filter unit and a right filter unit which have a built-in resonator so as to perform different frequency filtering, and the left filter unit and the right filter unit are electrically connected to the radiating element unit by passing through the reflector panel. Accordingly, an advantage of ameliorating the overall PIM problem is provided.

The present invention relates to an apparatus and a method for tuning an RF filter by using a single motor, which include a tuning screw driver for tightening a tuning screw and a nut driver for tightening a nut, in an RF filter, to control the screw and the nut with a single motor, and control the tuning screw driver and the nut driver of the RF filter with a time difference, and thus can reduce production costs. The apparatus for tuning an RF filter by using a single motor of the present invention includes: the single motor; a main gear fixed to an end of the single motor; a screw gear provided to be engaged with the main gear; a screw driver provided at the lower center of the screw gear to rotate; a nut gear provided to be engaged with the main gear; and a nut driver provided at the lower center of the nut gear to rotate.

An RF circuit device using modified lattice, lattice, and ladder circuit topologies. The devices can include four resonator devices and four shunt resonator devices. In the ladder topology, the resonator devices are connected in series from an input port to an output port while shunt resonator devices are coupled the nodes between the resonator devices. In the lattice topology, a top and a bottom serial configurations each includes a pair of resonator devices that are coupled to differential input and output ports. A pair of shunt resonators is cross-coupled between each pair of a top serial configuration resonator and a bottom serial configuration resonator. The modified lattice topology adds baluns or inductor devices between top and bottom nodes of the top and bottom serial configurations of the lattice configuration. These topologies may be applied using single crystal or polycrystalline bulk acoustic wave (BAW) resonators.

This invention discloses an improved NYFR structure and signal estimation method. The improved NYFR structure uses a bandwidth RF filter as input to intercept the non-cooperative radar signal x(t); the LO generates a non-uniform RF sampling pulse train p at the zero-crossing rising edge (ZCR) of a periodic chirp modulated signal. LO (t); the signal x(t) after passing through the ultra-wideband RF filter and the non-uniform RF sampling pulse train p with periodic chirp modulation. LO (t) After mixing, the signal y(t) is obtained through a low-pass filter; the signal y(t) is then discretized / digitized by an ADC to obtain the output discrete signal y(n); the RF sampling clock sends synchronization timing information T0 to the output signal processing module at the start of LO operation; the output signal processing module combines the discrete signal y(n) and the synchronization timing information T0 to achieve ultra-wideband reception and processing of non-cooperative radar signals that are insensitive to output signal truncation. This invention improves the NZ label estimation of the NYFR structure, making it insensitive to output signal truncation, resulting in better broadband reception robustness and enhancing the broadband reconnaissance effectiveness of NYFR.

To provide a technique for properly performing plasma processing using a pulsed DC signal.SOLUTION: A plasma processing apparatus includes a plasma processing chamber, a substrate support disposed in the plasma processing chamber, the substrate support including a conductive base, an electrostatic chuck disposed on the conductive base, a chuck electrode disposed in the electrostatic chuck, a bias electrode disposed below the chuck electrode in the electrostatic chuck, an upper electrode disposed above the substrate support, a radio frequency (RF) generator electrically connected to the conductive base, the bias electrode, or the upper electrode and configured to generate an RF signal, a pulsed direct current (DC) generator electrically connected to the bias electrode and configured to generate a pulsed DC signal, and an RF filter connected between the bias electrode and the pulsed DC generator. And a ringing suppression circuit configured to suppress ringing superimposed on the pulsed DC signal.SELECTED DRAWING: Figure 3

An RF filter has at least four outer side surfaces, a radiation element module which is disposed on one surface of the outer side surfaces of the RF filter, an amplifier substrate which is disposed on another surface of the outer side surfaces of the RF filter and on which an analogue amplification element is mounted, and a reflector which is disposed between the RF filter and the radiation element module to ground (GND) the radiation element module and also mediate the outwardly dissipating heat generated by the RF filter. Socket pins are coupled to a main board disposed at an antenna housing in a unit of a module.

Embodiments of the present disclosure relate to RF filter systems and methods. In some embodiments, an RF filter system includes a tuning signal injection circuitry, a tuning signal cancellation circuitry, and two FSLs. The RF filter system may receive one or more first RF signals that may include one or more signals of interest (SOIs) and one or more interfering signals. The RF filter system may receive one or more second RF signals that may include one or more tuning signals. The RF filter system may output one or more RF signals containing the one or more SOIs and attenuated versions of the interfering signals, without including the one or more tuning signals.

A bandpass filter can be configured, which includes a filter structure that includes a filter chamber and a group of tuned elements including first tuned elements and last tuned elements, wherein the first tuned elements and the last tuned elements include a pin that joins a connection medium to connect to a radio frequency (RF) signal path. An outer perimeter can connect to a ground plane present on the connection medium. The ground plane can form a bottom of the filter chamber. The group of tuned elements can be folded into a shape that occupies a space midway between a top lid and the ground plane. Alternatively, the group of tuned elements can be located above the ground plane on a single side of the filter structure.

A metal cavity filter according to one embodiment of the present disclosure comprises: a plurality of housings; and at least one metal member disposed between the plurality of housings, wherein one or more resonators are disposed in a cavity formed in each of the plurality of housings, and a slot for a slot resonator coupled to at least one resonator among the one or more resonators is formed in at least a part of the at least one metal member.

Device comprising the following: a transmit path for receiving, processing and outputting a transmit radio frequency (RF) signal, wherein the transmit path includes a first power amplifier; a receive path for receiving, processing and outputting a receive RF signal, wherein the receive path includes a first low-noise amplifier (LNA); and Switching circuits connected to the transmit path and the receive path, wherein: In a transmit mode, the switching circuits are designed to cause an RF filter to be coupled into the transmit path to filter the transmit RF signal, and to cause the filtered transmit RF signal to be fed to the first power amplifier and then to an antenna; and In a receive mode, the switching circuits are designed to ensure that the received RF signal is routed to the RF filter and the first LNA and subsequently provided to a digital processor. the switching circuits include the following: a first switch, wherein in transmit mode the first switch is intended to receive the transmit RF signal from the digital processor and to forward the transmit RF signal to a second switch; wherein the second switch is connected to the first switch and wherein, in transmit mode, the second switch is designed to route the transmit RF signal to the RF filter; and a third switch, wherein in transmit mode the third switch is intended to receive the filtered transmit RF signal from the RF filter and to route the filtered transmit RF signal to the first power amplifier.

This invention provides a terahertz monolithically integrated subharmonic mixer based on a single-ended structure, relating to the field of terahertz mixer technology. The mixer includes a substrate on which a mixing circuit is formed. The local oscillator input port is connected to one end of a local oscillator matching filter structure and one end of a bias circuit via the output of a DC blocking capacitor. The other end of the local oscillator matching filter structure is connected to the gate of the mixer element, and the other end of the bias circuit is connected to the Vg power-on terminal. The radio frequency (RF) port is connected to an RF matching structure and an intermediate frequency (IF) filter structure via an RF filter structure. The other end of the RF matching structure is connected to the drain of the mixer element, and the other end of the IF filter structure is connected to the IF port. The mixer element is a common-source FET / HEMT die. This solution utilizes the square-law characteristics of the mixer element to realize a terahertz monolithically integrated subharmonic mixer based on a single-ended structure, exhibiting performance indicators such as low conversion loss, small size, and high port isolation over a wide bandwidth.

The radio frequency (RF) filter includes an inductive element having multiple coil sections that collectively form an undivided coil of twisted magnetic wire cable. At least two adjacent coil sections have different winding pitches. The twisted magnetic wire cable includes two wires per channel and is configured for at least one channel. The twisted magnetic wire cable is configured at the first end of the inductive element for connection to an electrical component that will receive power from a power source. The twisted magnetic wire cable is configured at the second end of the inductive element for connection to a power source. Termination capacitive elements are electrically connected between the reference ground potential and each wire of the twisted magnetic wire cable at each location between the second end of the inductive element and the power source.