Reflector (antenna)

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

Apparatus for switching optical signals and method of operation

Abstract: The present invention provides an apparatus (74 and 200) for switching an optical signal from an input optical fiber (210) to one of a plurality of output optical fibers (214 and 216). The apparatus (74 and 200) includes a collimator (76) for collimating an input optical signal into a collimated beam (216) at an angle with respect to a reference and a decollimator (78) for focusing the collimated beam to an output optical signal (220). The present invention also includes a reflector (92, 208, 218 and 222) for reflecting the collimated beam. The reflector (92 and 208) has a plurality of positions for changing the angle of the collimated beam (216) with respect to the reference so that the output optical signal (220) is focused on one of the plurality of output optical fibers (214 and 216).

Antenna arrangement, in particular for a mobile radio base station

Abstract: An improved antenna arrangement is distinguished by the following features: - the reflector arrangement has a printed circuit board (5) with an electrically conductive ground plane (7), the reflector arrangement also has a reflector frame (11) with a coupling surface (13), the coupling surface (13) is capacitively coupled to the ground plane (7), the coupling surface (13) has a recess (13a) via which the ground plane (7), which is located underneath it, and/or the printed circuit board (5) or an isolating intermediate layer which is provided above the ground plane (7) or an isolating intermediate layer which is provided above the printed circuit board (5) is exposed, and the at least one antenna element arrangement (3) is positioned and/or held on the printed circuit board (5) in the area of the recess (13a).

Intruder detecting device and radiowave reflector

Abstract: PROBLEM TO BE SOLVED: To provide a reliable intruder detecting device capable of reducing false detection, by enhancing identification accuracy between detecting objects and non-detecting objects. SOLUTION: A transmitting and receiving antenna 1a of the radar 1 is configured with a parabolic antenna, a radiowave reflector 2 is configured with a reflector array 6 consisting of a plurality of reflectors, and the beam widths A1 and A2 of the transmitter wave 5 in the vicinity of the radar 1 and of the reflected wave 7 in the vicinity of the radiowave reflector 2, respectively, are established to be larger than the beam width C the non-detecting objects, such as a bird 9 to be removed from detecting objects, can interrupt. COPYRIGHT: (C)2006,JPO&NCIPI

Enclosure for radio, parabolic dish antenna, and side lobe shields

Abstract: Enclosures for radios, parabolic dish antennas, and side lobe shields are provided herein. A dish antenna includes a parabolic circular reflector bounded by a side lobe shield that extends along a longitudinal axis of the dish antenna in a forward direction forming a front cavity, and a sidewall that extends along the longitudinal axis of the dish antenna in a rearward direction forming a rear cavity.

Reconfigurable antenna system

Abstract: A two-step method is used to reconfigure beams among different orbital slots for a satellite system. The satellite is biased at one or more orbital slots for a back-up mission, while it looks at the sub-satellite point for the primary mission. Body steering is achieved using pitch and roll biases. The main reflector of the antenna is gimballed in order to steer the beams to different locations for the back-up mission. Beam size is controlled through the use of different sized reflectors and by varying the feed size. Different sized beams are interleaved among multiple reflectors.