104results about How to "Increased operating bandwidth" patented technology

An improved rotary servovalve system employs a rotary magnetic solenoid having an armature that includes at least one permanent magnet. The armature is rotatable relative to a stator formed as an electromagnet which is energizable to create alternative electromagnetic fields having opposite polarities from each other. When deenergized, the stator allows the armature to return to a neutral, null position from positions of extreme rotation in opposite angular directions due to the magnetic force of the permanent magnet of the armature. The armature is coupled to carry a movable valve element in angular rotation therewith, so that flow through the servovalve of the system can occur in alternative directions. Also, the valve element is biased toward a position in which all of the valve ports are closed when power is removed from the rotary solenoid. The control circuit employed in the rotary servovalve system expands the bandwidth of response of the solenoid actuator by compensating for frequency variations in the input command signal and in the feedback signal. This compensation is achieved utilizing a combined proportional, integral, and differential amplification circuit. Also, imbalance of fluid forces within the servovalve mechanism can be avoided by utilizing a pair of inlet orifices, a pair of outlet orifices, a pair of first fluid control orifices, and a pair of second fluid control orifices. The orifices within each pair are located on opposite sides of the valve housing from each other.

A low distortion, high frequency switch circuit for selectively coupling an input voltage terminal to an output voltage terminal includes a switching device coupled to the input voltage terminal and the output voltage terminal, a charge storage device, and a first, second and third switches. While the switch circuit is turned off, the charge storage device, typically a capacitor, is charged to a precharge voltage. Then, when the switch circuit is to be turned on, the charge storage device is coupled between the control terminal of the switching device and the input voltage terminal. As a result, the switching device receives a constant gate-to-source voltage approximately equals to the precharge voltage and becomes conductive with a minimum and constant R_ON for all values of input voltages. In another embodiment, the switch circuit includes a pedestal voltage compensation circuit for reducing charge injection induced pedestal errors.

An improved integrated circuit package for providing built-in heating or cooling to a semiconductor chip is provided. The improved integrated circuit package provides increased operational bandwidth between different circuit devices, e.g. logic and memory chips. The improved integrated circuit package does not require changes in current CMOS processing techniques. The structure includes the use of a silicon interposer. The silicon interposer can consist of recycled rejected wafers from the front-end semiconductor processing. Micro-machined vias are formed through the silicon interposer. The micro-machined vias include electrical contacts which couple various integrated circuit devices located on the opposing surfaces of the silicon interposer. The packaging includes a Peltier element.

The present invention relates to a flextensional transducer device comprising a multi-resonant shell and push-pull driving system for driving the shell so as to provide at least two tunable resonant modes, thereby increasing the operational bandwidth of the device. The push-pull driving system is formed by four rings of active drive material grouped to operate as two opposing push-pull pairs. The shell has a dog-bone configuration with two arcuately shaped interior web portions joined to the pairs of rings, end sections joined to the interior web portions, and a central concave section which functions as the primary radiating surface. Upon application of a desired current to the push-pull ring pairs, the interior web portions are caused to vibrate, which vibrations are transmitted to the end sections and the central concave section. By raising or lowering the bending stiffness of the interior web portions, the end sections, and the central concave section, one can selectively tune the modal resonance of the shell.

A system interface includes a plurality of first directors, a plurality of second directors, a data transfer section and a message network. The data transfer section includes a cache memory. The cache memory is coupled to the plurality of first and second directors. The messaging network operates independently of the data transfer section and such network is coupled to the plurality of first directors and the plurality of second directors. The first and second directors control data transfer between the first directors and the second directors in response to messages passing between the first directors and the second directors through the messaging network to facilitate data transfer between first directors and the second directors. The data passes through the cache memory in the data transfer section. A method for operating a data storage system adapted to transfer data between a host computer/server and a bank of disk drives. The method includes transferring messages through a messaging network with the data being transferred between the host computer/server and the bank of disk drives through a cache memory, such message network being independent of the cache memory.

A system interface includes a plurality of first directors, a plurality of second directors, a data transfer section and a message network. The data transfer section includes a cache memory. The cache memory is coupled to the plurality of first and second directors. The messaging network operates independently of the data transfer section and such network is coupled to the plurality of first directors and the plurality of second directors. The first and second directors control data transfer between the first directors and the second directors in response to messages passing between the first directors and the second directors through the messaging network to facilitate data transfer between first directors and the second directors. The data passes through the cache memory in the data transfer section. A method for operating a data storage system adapted to transfer data between a host computer/server and a bank of disk drives. The method includes transferring messages through a messaging network with the data being transferred between the host computer/server and the bank of disk drives through a cache memory, such message network being independent of the cache memory.

A first housing includes a first conductor plate, and a second housing includes a second conductor plate. A rotation mechanism openably and closably attaches the second housing to the first housing. A first driven element and a second driven element are arranged along a rotation axis of the rotation mechanism. Between the first driven element and the second driven element, a continuity structure intersects the rotation axis to establish direct-current or high-frequency continuity between the first conductor plate and the second conductor plate. An antenna device can be provided which can ensure sufficient isolation between a plurality of driven elements.

The invention discloses a mobile communication device, which is provided with a ground plane and an antenna, wherein the antenna is positioned on a dielectric substrate which is adjacent to the ground, and comprises a radiation part, a feed-in part and a short circuit unit; one end of the feed-in part is connected to a signal source, and the other end of the feed-in part is electrically connected to the radiation part; the feed-in part is also provided with a capacitive element or an open section; and the short circuit unit provides two different short circuit paths which electrically connect the radiation part to the ground. The mobile communication device and the antenna thereof operate with bandwidth ranges covering LTE700/GSM850/900(704-960MHz) and GSM1800/1900/UMTS/LTE2300/2500(1710-2690MHz) respectively, and the bandwidth ranges covers all the current mobile communication bands; and simultaneously, the size of the antenna is small, so that the antenna is suitable for thin mobile communication devices.

A coupling antenna has a ground plane, a main radiating assembly and a secondary radiating assembly. The main radiating assembly is mounted on the ground plane and has a substrate, a feeding-and-coupling assembly and a shorting member. The feeding-and-coupling assembly has a feeding member, a coupling member and an extension member. The second radiating assembly is mounted on the ground plane, is connected to the main radiating assembly and has a first radiating patch and a second radiating patch. With the extension member and the first and second radiating patches, operating bandwidth of the coupling antenna is improved.

The present invention relates to an antenna, which includes a feeding part and a radiating part. By using the feeding part and the radiating part that are perpendicular to each other and use dielectric substrates, not only a volume of a normal radiation antenna is reduced, but also a substrate integrated waveguide directly radiates energy outwards, thereby improving operating bandwidth of the antenna.

The present invention is related to a structure for inverted F plane antenna, which is on a surface of a PCB by way of etching. The antenna comprises a pair of parallel sections constructed by a first parallel section, a second parallel section and a vertical section perpendicular to the two parallel sections, wherein the first parallel section connects to a grounding end of the PCB electrically, the second parallel section connects to a power end of the PCB, the vertical section has a bending portion with U shape to increase the length of receiving signals, therefore reflection signals may be highly decreased, and functions of receiving/emission stronger power are then achieved and receiving/emission band width is increased; further, under conditions of not extending the length of the vertical section and shrinking the volume of the antenna shall upgrade the convenience of the design.

Radiotelephones configured with integrated matching circuit components in the housing and antenna are disclosed. The present invention configures the antenna and the associated housing receiving passage to define a capacitor and inductor to match the differing impedances generated by retractable top load antennas (retracted and extended impedances) without requiring a separate switching circuit and wiping contacts.

A system interface includes a plurality of first directors, a plurality of second directors, a data transfer section and a message network. The data transfer section includes a cache memory. The cache memory is coupled to the plurality of first and second directors. The messaging network operates independently of the data transfer section and such network is coupled to the plurality of first directors and the plurality of second directors. The first and second directors control data transfer between the first directors and the second directors in response to messages passing between the first directors and the second directors through the messaging network to facilitate data transfer between first directors and the second directors. The data passes through the cache memory in the data transfer section. A method for operating a data storage system adapted to transfer data between a host computer/server and a bank of disk drives. The method includes transferring messages through a messaging network with the data being transferred between the host computer/server and the bank of disk drives through a cache memory, such message network being independent of the cache memory.

A triple band antenna includes a feed-in portion, a first radiating portion, a second radiating portion, a third radiating portion and a grounding portion. The first radiating portion is connected to a first side of a first end of the feed-in portion. A second end of the second radiating portion is connected to a second side of the first end of the feed-in portion. The third radiating portion is connected to a third end of the second radiating portion. The grounding portion is located at two sides of the feed-in portion.

A Raman shifter is provided with improved optical efficiency and robustness, particularly for high power applications. In one embodiment, a source system (100) includes a source pump laser (102) and a seed laser (104). Beams from the pump laser (102) and seed laser (104) combine for transmission into a Raman cell (112). Folding optics define a multi-pass pathway through the Raman cell (112). Such folding optics may include an internal reflectance element. An entry window into the Raman cell, an exit window from the Raman cell, and the internal reflectance elements include surfaces disposed at a Brewster angle relative to the incident beam. The Raman cell medium is circulated in a direction transverse to the beam pathways through the cell. In this manner, improved optical efficiency and robustness is achieved as well as improved performance over a significant wavelength band.

The invention discloses a multi-band antenna which comprises a loop micro-strip line and a parasitic micro-strip line, wherein the loop micro-strip line comprises a signal feeding end and a first grounding end; a route from the signal feeding end to the first grounding end is half of a wavelength; the parasitic micro-strip line comprises a second grounding end and a first open end; a route from the first open end to the second grounding end is a quarter of the wavelength; a signal is input from the signal feeding end in order to arouse a first resonance modal frequency via the loop micro-strip line; the parasitic micro-strip line is encircled by the loop micro-strip line; an electromagnetic radiation of the first resonance modal frequency is coupled with the parasitic micro-strip line in order to arouse a second resonance modal frequency via the parasitic micro-strip line; and the second resonance modal frequency is different from the first resonance modal frequency. The multi-band antenna of the invention utilizes the loop micro-strip line to encircle the parasitic micro-strip line, realizes the function of multi-frequency communication and keeps high communication quality in a limited accommodating space.

A communication device comprises a grounding element and an antenna element. The antenna element has a first connection point, and at least comprises a first branch, a second branch and a third branch. One end of the first branch is coupled to the first connection point via an inductance element. One end of the second branch is coupled to the first connection point. A second section of the second branch is roughly parallel to a first section of the first branch. The second branch is arranged between the first branch and an edge of the grounding element. One end of the third branch is coupled to a second connection point on the first branch. The third branch and the first branch extend in roughly opposite directions. The first connection point is also coupled to a signal source via a high-pass matching circuit. A grounding end of the high-pass matching circuit is coupled to the grounding element. The antenna element of the communication device provided by the invention can be designed to be low in posture and small in size, and the antenna element can carry out operation in multiple bands including LTE/WWAN band and WLAN2.4GHz band.

A system interface includes a plurality of first directors, a plurality of second directors, a data transfer section and a message network. The data transfer section includes a cache memory. The cache memory is coupled to the plurality of first and second directors. The messaging network operates independently of the data transfer section and such network is coupled to the plurality of first directors and the plurality of second directors. The first and second directors control data transfer between the first directors and the second directors in response to messages passing between the first directors and the second directors through the messaging network to facilitate data transfer between first directors and the second directors. The data passes through the cache memory in the data transfer section. A method for operating a data storage system adapted to transfer data between a host computer/server and a bank of disk drives. The method includes transferring messages through a messaging network with the data being transferred between the host computer/server and the bank of disk drives through a cache memory, such message network being independent of the cache memory.

The invention provides a loop type coupling antenna, which includes: a feed-in wire, a coupling conductor, a first coupling part, a second coupling part, a second conductor and a ground surface, one end of the coupling conductor belongs to the first coupling part, another end belongs to the second coupling part; the feed-in wire connects with the first coupling part for providing a feed-in signal to the first coupling part; the feed-in signal couples to the second coupling part through the coupling conductor; one end of the second conductor connects with the second coupling part, another end connects with the ground surface that conduct signal of the second coupling part to the ground surface by using the second conductor. Impedance match can be adjusted efficiently by using the first coupling part, and antenna operation frequency width can be increased. The second coupling part and the second conductor reduce resonant frequency, and shorten wavelength of resonant path center frequency.