Reflector (antenna)

About: Reflector (antenna) is a research topic. Over the lifetime, 28730 publications have been published within this topic receiving 212618 citations.

Apparatus and methods for transmitting or receiving electromagnetic waves

Abstract: Aspects of the subject disclosure may include, a system for generating electromagnetic signals that resonate in a cavity having a plurality of reflectors resulting in resonating electromagnetic signals and combining the resonating electromagnetic signals to form an electromagnetic wave that traverses a reflector and couples onto a physical transmission medium. Other embodiments are disclosed.

Reflector Antenna Distortion Analysis Using MEFCM

Abstract: The impact of random errors and systematic errors due to reflector surface distortions is discussed by using Ruze formula in conjunction with the mechanical-electromagnetic-field coupling model (MEFCM). Ruze formula demands too rigorous reflector precision and manufacturing accuracy due to not taking the systematic error into consideration. The best-fitting method treats the systematic error, but not random error. The MEFCM takes both systematic error and random error into account. Numerical examples of 7.3 m and 40 m diameter reflector antenna validate the method proposed. The proposed MEFCM method integrates the mechanical design with electromagnetic analysis in order to optimize the reflector antenna design.

Miniaturized photoacoustic imaging apparatus including a rotatable reflector

Abstract: A reflection-mode photoacoustic endoscope includes a light source configured to emit a light pulse, a signal detection or transmission unit configured to detect or emit an ultrasonic pulse, and a rotatable reflector. The rotatable reflector is configured to reflect at least one of the light pulse and the ultrasonic pulse into a target area of an object, and reflect a response signal to the signal detection unit. The response signal is one of a photoacoustic wave generated by the object responsive to the light pulse and an ultrasonic pulse echo generated by the object responsive to the ultrasonic pulse.

A method for producing a shaped contour radiation pattern using a single shaped reflector and a single feed

Abstract: Eliminating the corporate feed network in shaped contour beam antennas will reduce the expense, weight, and RF loss of the antenna system. One way of producing a shaped contour beam without using a feed network is to use a single shaped reflector with a single feed element. For a prescribed contour beam and feed, an optimization method for designing the reflector shape is given. As a design example, a shaped reflector is designed to produce a continental-United-States (CONUS) coverage beam. The RF performance of the shaped reflector is then verified by physical optics. >

Flash tube reflector with arc guide

Abstract: A combined reflector and arc guide for use with a xenon flash tube comprises a reflector structure having a reflecting surface that is adapted to be placed in a predetermined orientation with respect to the flash tube. An electrically conductive arc guide is carried by, and is preferably integral with, the reflector structure for controlling the arc in the flash tube. The arc guide comprises an elongated ridge that projects outwardly from the reflecting surface of the reflector structure, and extends in a direction substantially parallel to the longitudinal axis of the flash tube. An electrical terminal is carried by the reflector structure and has an electrical connection to the arc guide for allowing an electrical potential to be applied to the arc guide. The reflector structure is preferably made of an electrically conductive plastic material, thereby providing continuity between the electrical terminal and the arc guide without the need for a separate conductor. An area of modified reflectivity, preferably in the form of a plurality of grooves, may be provided in the reflective surface of the reflector structure to spread out the intensity peak of the flash tube. The disclosed reflector is simple and inexpensive to manufacture, and is suited for use in automated hematology systems in which a pulse of light from the flash tube causes dyed blood cell layers in a capillary tube to fluoresce so that a complete blood count can be obtained by optical imaging techniques while the blood sample is being rotated in a centrifuge.