Topic
Active antenna
About: Active antenna is a research topic. Over the lifetime, 2246 publications have been published within this topic receiving 26493 citations.
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Patent•
24 Nov 2016
TL;DR: In this article, the authors disclosed an active antenna device and a base station, and related to an RRU (remote radio unit) and an antenna system in the communication field, which is especially suitable for hot-spot coverage.
Abstract: The invention discloses an active antenna device and a base station, and relates to an RRU (remote radio unit) and an antenna system in the communication field. The disclosed active antenna device comprises an upper housing module and a lower housing module connected with each other, wherein a bonding surface between the upper housing module and the lower housing module is a reflection plate of the upper housing module. The invention further discloses a base station comprising the active antenna device. It can be seen from the description that in the technical scheme provided by the invention, an antenna and an RRU are integrated into one body, the cost of the antenna base station is reduced, the power radiation effective performance is high, and the active antenna device and the base station are especially suitable for hot-spot coverage.
2 citations
01 Oct 2001
TL;DR: In this paper, an active integrated antenna working in the millimeter wave has been realized in a monolithic process, and the design of the integrated circuit based on a global approach, following electromagnetic and circuit simulations, is presented.
Abstract: An active integrated antenna working in the millimeter wave has been realized in a monolithic process. The concept of active integrated antenna is first introduced, then the design of the integrated circuit based on a global approach, following electromagnetic and circuit simulations, is presented. The obtained performances of the active antenna are discussed and compared to a passive one.
2 citations
11 Jul 1999
TL;DR: The ASAR antenna is described, the development status is presented and a digital generation waveform technique for obtaining variable time-bandwidth products and a block adaptive quantization compression scheme are presented.
Abstract: The Advanced Synthetic Aperture Radar (ASAR) is a major instrument on board ENVISAT-1. The next Earth observation mission of the European Space Agency. It will represent a sensor of paramount importance for the remote sensing community because of its enhanced flexibility with respect to the existing SARs in the AMI on board ERS-1 and ERS-2. The unique combination of different spatial resolutions, incidence angles, swath width sizes and polarisation diversity will offer an increased number of operational modes tailored for a large set of scientific and operational applications. Among the innovative design features of this radar are the use of an active antenna concept for tailoring the transmit and receive elevation beams to different mode geometries, a digital generation waveform technique for obtaining variable time-bandwidth products and a block adaptive quantization compression scheme. In this paper, the ASAR antenna is described and the development status is presented.
2 citations
Patent•
12 Feb 2019
TL;DR: In this paper, an AAU (Active Antenna Unit) front end structure for 5G (Fifth Generation) wireless communication equipment is described, where the structure comprises an antenna radome, wherein a plurality of air convection holes are formed in the antenna radomes; waterproof breathable films are covered on the air convections holes; coupling plates and bottom layer physical layers are arranged on one side of each reflecting plate far away from the antenna radiome; heat-conducting silica glues are arranged between the bottom-layer physical layers and the reflecting plates in a
Abstract: The invention discloses an AAU (Active Antenna Unit) front end structure for 5G (Fifth Generation) wireless communication equipment The structure comprises an antenna radome, wherein a plurality of air convection holes are formed in the antenna radome; waterproof breathable films are covered on the air convection holes; coupling plates and bottom layer physical layers are arranged on one side ofeach reflecting plate far away from the antenna radome; heat-conducting silica glues are arranged between the bottom layer physical layers and the reflecting plates in a clamped manner; the coupling plates and the bottom layer physical layers are connected through cable communication; a plurality of cavity body filters are arranged on the coupling plates; at least two core wires are led out of aninner cavity of each cavity body filter; and the cavity body filters are connected with antennas through core wires in a power dividing manner A miniaturized cavity body filter is adopted, and connectors and the filter cavity bodies are designed to be integrally formed, so that the structure can effectively reduce the height direction dimension of the AAU, the connection reliability of the antennas and the filters is greatly improved, and the cost of the connectors is greatly reduced; an air convection window is arranged on the antenna radome, and the metal reflection plates are utilized to participate in AAU heat dissipation
2 citations
Patent•
22 Jun 2018
TL;DR: In this paper, the authors proposed a method for selecting an active antenna group of a transmitting end in a generalized spatial modulation communication system, which comprises the following steps: performing channel estimation on a receiving end, and transmitting the estimated channel state information to the transmitting end through a feedback channel.
Abstract: The invention discloses a method for selecting an active antenna group of a transmitting end in a generalized spatial modulation communication system The method comprises the following steps: performing channel estimation on a receiving end in the generalized spatial modulation communication system, and transmitting the estimated channel state information to the transmitting end through a feedback channel; receiving, by the transmitting end, the channel state information, and processing the channel state information by using a square-maximum minimum European span criterion to determine the minimum squared Euclidean distance corresponding to each active antenna group of the transmitting end; comparing, by the transmitting end, the minimum squared Euclidean distances corresponding to the active antenna groups, and selecting the active antenna group corresponding to the minimum squared Euclidean distance with the maximum value as the active antenna group of the generalized spatial modulation communication system By adoption of the method, the signal transmission efficiency in the generalized spatial modulation communication system can be improved, the best error symbol rate performance can be obtained under the maximum minimum European span criterion, and meanwhile compared with the existing exhaustive algorithm, more than half of the computational complexity is reduced, and thesystem performance is improved
2 citations