摘要:
The present invention provides a method to measure antenna efficiency using the cavity method. In particular, the present invention provides a tunable cavity that can be tuned to avoid the anti resonance and antenna-cavity coupling problems. In particular, tuning probes and/or variable volumetric sizing of the cavity are used to tune the cavity to avoid the anti resonance and antenna-cavity coupling.
摘要:
The present invention provides, an antenna test device to test antenna efficiency. The test device includes a cavity formed by at least one conductive sidewall. The cavity contains at least one tuning probe, at least one movable portion, or a combination thereof. The tuning probes and/or movable portion help inhibit the antenna under test from having faulty measurements due to anti resonance or coupling.
摘要:
A sensor assembly that replaces a single focal plane array detector with two focal plane array detectors orientated with respect to each other such that a power splitter divides an incoming light source equally between each detector. The two detectors are selected such that the locations of poorly-operating pixels in each detector do not overlay. The output signals of each detector are then electronically or analytically combined to yield 100 percent operability. Separate switchable wavelength filter wheels having one or more different wavelength filters may be positioned between the power splitter and each of the detectors. The power splitter may be replaced by a polarization splitter. One detector can be translated perpendicular to the incoming light source relative to the second detector to compensate for new poorly-operating pixels and/or to improve the spatial resolution.
摘要:
In combination with a diagnostic CT scanner using radiant energy for imaging, an apparatus for therapeutically irradiating a target, comprising a mask that partially attenuates the radiant energy passing therethrough, but transmits through an aperture sufficient radiant energy for imaging. The mask, intermediate the radiant energy source and the target, passes an unattenuated portion of the radiant energy to irradiate the target. The cross-sectional shape and spatial position of the mask aperture can be selectively varied. A post-mask is aligned with the mask aperture and attenuates the radiant energy passing therethrough to an energy level essentially uniform with that of the radiant energy passing through the mask to permit continued imaging during therapeutic irradiation of the target. A method of using the invention in combination with a diagnostic CT scanner using radiant energy for imaging is also provided.
摘要:
A method and apparatus are disclosed for controlling an electronic display using a keyboard to allow designation of desired regions on the display or in the memory of the system. A method of designating desired regions on the display under control of a keyboard which has at least one designation key includes the steps of positioning a cursor at a first location in fixed relationship to the desired region, activating a first designation key, and supplying through the keyboard signals to indicate a second location in fixed relationship to the selected region to cause a portion of the selected region between the first location and the desired location to be designated. The apparatus for designating a region on a display includes a processing unit coupled to the display, a keyboard connected to the processing unit to control the display, and first and second designation keys coupled to the processing unit for causing the processing unit to search the display for a pattern entered into the keyboard while at least one of the first or second keys is activated.
摘要:
A system for creating and modifying strings of symbols in a computer storage apparatus includes a two-part cursor for guiding the operator. One cursor part indicates the exact location where entered symbols will be inserted. A second cursor part highlights a selected substring which is the object of certain commands, such as the delete command. Internally, the system provides memory management techniques for inserting and deleting symbols in response to operator commands. The display, including the two-part cursor, is derived from the memory contents with the aid of pointers, tables, and state variables.
摘要:
Treatment of malignant tumors or other lesions by localized transfer of radio frequency electromagnetic energy into a portion of the body may be achieved by means of spatially localized magnetic resonance (MR). A magnetic field with appropriate spatial distribution and radio frequency tuned to the resonant frequency unique to the tumor treatment volume will cause selective therapeutic energy deposition or heating within the tumor (hyperthermia). The desired magnetic field distribution for the MR treatment volume may be achieved by means of a main static magnetic field with a superimposed magnetic field to define the treatment volume size and shape, positioned by a gradient magnetic field. Treatment may be enhanced by MR contrast agents and pharmacologic agents. In a preferred embodiment, the invention is incorporated in a magnetic resonance imaging (MRI) scanner modified by the addition of a localizing magnet.
摘要:
The present device is a board game for playing a variety of pawn advancement games and comprises a playing board having a central game grid with surrounding borders of different colors. Each colored border has five areas: OUT, PLAY, YES, NO, and WINNERS. Each player is assigned to a colored border and is provided a spotted die for rolling, a numbered die for assigning, and at least one pawn. The player's border, dice, and pawns have matching colors. Each player has an objective to move their colored pawns across the game grid from the player's border to the last line of the game grid farthest away. Advancement of each pawn is determined by the rolled values of the spotted dice, the assigned values of the numbered dice, and switching of pawns. The first player moving all their pawns into their WINNERS area is declared the winner.
摘要:
An antenna for a foldable wireless device is provided. The foldable wireless device and antenna include a first housing and a second housing pivotally connected. A printed circuit board associated with the wireless device comprises a first PCB in the first housing and a second PCB in the second housing. The first and second PCB function as first and second radiating plates respectively. A gap, generally aligned with the pivotal connection separates the first and second PCBs. A short is provided that traverses the gap and connects the first and second PCBs. Radio frequency power is connected to the first and second PCB to supply radio frequency power.
摘要:
An antenna having a radiating element comprising a metalized fabric is provided. The antenna including a radiating element with a feed connection attached to the radiating element. The radiating element being constructed from a metalized fabric including a core material and a metal material.