Abstract:
The present invention relates generally to the use of antenna array systems used in e.g., mobile radio systems. Interfering signals are received from adjacent antenna arrays. These result in intermodulation ("IM") products which interfere with the transmission of the desired signals. Because these IM products are transmitted along the path between the amplifier and the antenna element, it is possible to adjust the length of this path from element to element, thereby shifting the wavefront of the IM product so that they are less coherent. To keep the total transmission length for the desired signal constant, the length between the splitter and amplifier is adjusted so that the total transmission length stays constant from splitter to antenna element. The result is that the wavefront for the desired signal stays coherent while that for the IM products does not. This provides less interference from the IM products.
Abstract:
La présente invention concerne un radar multistatique à base de méta matériaux et une méthode de sa calibration pour la détection des objets et leurs distances lesquels objets sont considérés comme des réflecteurs électromagnétiques. Ledit radar est caractérisé en ce qu'il comporte un dispositif (300) de découplage électromagnétique placé entre chaque couple d'antenne émettrice (110) /antenne réceptrice adjacente (120, 130), ledit dispositif ayant une forme pyramidale constitué d'une base ( 301) pour éliminer le couplage guidé et d'au moins deux faces planaires (302, 303) pour éliminer le couplage rayonné où un angle est formé entre le plan d'une quelconque face et le plan de la base de la structure pyramidale (300) formant l'absorbant électromagnétique, lequel angle est inférieure ou égale à l'angle obtenue entre l'axe (115, 135) du lobe principale (111, 131) et l'axe (116, 136) du lobe secondaire (112, 132) du diagramme de rayonnement de l'antenne juxtaposée à ladite face planaire formant la structure pyramidale (300). L'invention concerne aussi une méthode de calibration dudit radar multistatique pour la détection des obstacles et des distances.
Abstract:
An antenna having an array structure for full-duplex communication on a same wireless resource is provided, as well a network element including such an antenna and a beamforming processor. A method for transmitting and receiving simultaneously on a same wireless resource using such an antenna is also provided. The antenna includes multiple transmit antenna elements, each of these elements coupled to a respective gain- controlled transmit amplifier. The antenna also includes multiple receive antenna elements, each of these elements coupled to a respective gain-controlled receive amplifier. The antenna also includes an electromagnetic isolation structure located between the plurality of transmit antenna elements and the plurality of receive antenna elements.
Abstract:
A device comprising: a substrate; a semiconductor die mounted on the substrate; a transmit antenna fabricated on the substrate and configured to transmit radio-frequency (RF) signals at least at a first center frequency; a receive antenna fabricated on the substrate and configured to receive RF signals at least at a second center frequency different than the first center frequency; and circuitry integrated with the semiconductor die and configured to provide RF signals to the transmit antenna and to receive RF signals from the receive antenna.
Abstract:
본 발명은 분리도 제공 장치를 구비한 이중편파 안테나에 있어서; 제1포트를 통해 급전선을 거쳐 제공되는 송신 신호를 출력하는 송신 안테나 소자와; 수신 신호를 수신하여 제2포트로 제공하는 수신 안테나 소자와; 송신 신호를 일부 분배하는 제1커플러와; 제1커플러에서 분배된 신호를 미리 설정된 파형과 등화시키는 이퀄라이저와; 이퀄라이저의 출력을 제공받아 제2포트로 출력되는 신호에 결합하는 제2커플러와; 제1커플러, 이퀄라이저 및 제2커플러간의 신호 전달 경로를 형성하는 전도체를 포함하며; 전도체를 이용한 신호 전달 경로를 통해 제2포트에 결합되는 신호가 송신 안테나 소자에서 수신 안테나로 오유입되는 신호와 대비하여 실질적으로 동일한 크기 및 180도 위상 차이를 가지며 전체 동작 주파수 대역에서 동일한 형상을 가지도록, 상기 제1, 제2커플러의 커플링 성능, 상기 전도체의 길이 및 상기 이퀄라이저의 기능 특성이 설계된다.
Abstract:
One embodiment is directed to an antenna module comprising integrated RF circuitry comprising at least one of a transmitter and a receiver. The module further comprises an antenna element operatively coupled to the integrated RF circuitry, the antenna element comprising first and second substantially co-planar portions. The integrated RF circuitry is disposed on an interior part of at least one of the first and second substantially co-planar portions. Other embodiments are disclosed.