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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
Chen Wei1, Rong Wan1, Dixiu Hu1, Wanhong Ba1
12 Apr 2018
TL;DR: In this paper, the authors provide a multi-sector MIMO active antenna system and a communications device, where each column of dual-polarized antennas includes one column of antenna units in the first polarization direction and one column in the second polarization direction.
Abstract: Embodiments of the present invention provide a multi-sector MIMO active antenna system and a communications device, where the multi-sector MIMO active antenna system includes N columns of dual-polarized antennas, where each column of dual-polarized antennas includes one column of antenna units in a first polarization direction and one column of antenna units in a second polarization direction, antenna array elements in an antenna unit in the first polarization direction are set to have a first antenna downtilt and serve a first sector, and antenna array elements in an antenna unit in the second polarization direction are set to have a second antenna downtilt and serve a second sector.
Patent
16 Mar 2020
TL;DR: In this paper, a radiation apparatus for an active phased array antenna with a cooling plate, capable of increasing thermal reliability, and an active antenna thereof is proposed. But the authors do not consider the effect of the cross-sectional area of an upstream section of the inlet header part.
Abstract: According to the present invention, suggested are a radiation apparatus for an active phased array antenna with a cooling plate, capable of increasing thermal reliability, and an active antenna thereof. The apparatus includes: a plurality of plate parts arranged in a first direction, extended in a second direction and coming in thermal contact with transmission and reception elements of an active antenna; an inlet header part extended in the first direction, and connected to an end of the plate parts; an outlet header part extended in the first direction, and connected to the other end of the plate parts; and a cooling fluid circulation part supplying cooling fluids to the plate parts and collecting cooling fluids from the plate parts through the inlet header part and the outlet header part. With respect to the flow of the cooling fluids, the cross-sectional area of an upstream section of the inlet header part is smaller than the cross-sectional area of a downstream section thereof, and the cross-sectional area of an upstream section of the outlet header part is larger than the cross-sectional area of a downstream section thereof. Also, when the size of a reference cross-sectional area of the inlet and outlet header parts is defined as D, the size of the cross-sectional area of the upstream section is smaller than D, the size of the cross-sectional area of the downstream section is larger than the D, components of the cooling fluids include antifreeze, the material of the plate parts include metal, the transmission and reception elements are placed on both sides of the plate parts in the first direction, and the transmission and reception elements are arranged on both the sides in a grid form, respectively.
Proceedings ArticleDOI
04 Aug 2019
TL;DR: In this paper, the authors describe a new measurement concept in compact test chambers using the first commercially available Plane Wave Converter (PWC): the R&S PWC200 is a phased antenna array of 156 elements located in the near-field of the DUT.
Abstract: Basestation antenna systems in 5G new radio present two significant challenges for antenna measurement: Electrically large DUTs (device under test) without traditional RF port interfaces. Therefore, several transceiver performance metrics need to be measured OTA in far-field conditions, including Error Vector Magnitude (EVM), Adjacent Channel Leakage Power (ACLR), and Spectral Emissions Mask (SEM). Due to the basestation size in the 5G sub 6 GHz frequency bands, this requires a far-field chamber with 10 to 50 meters of range length. This paper describes a new measurement concept in compact test chambers using the first commercially available Plane Wave Converter (PWC): The R&S PWC200 is a phased antenna array of 156 elements located in the near-field of the DUT. It uses a variant of a hardware based Fourier transform to create far-field conditions, a quiet zone of a plane wave of e.g. 1m diameter at a distance of 1.5 meters. The measurement system is bidirectional and able to directly measure both traditional antenna metrics of gain as well as transceiver metrics of EVM, ACLR, SEM, and receiver sensitivity. We present sample measurements with the R&S PWC200 of a high gain basestation antenna of dimensions 60 x 60 cm, which are in excellent agreement with measurement results from a third party certified laboratory.
Patent
15 Mar 2018
TL;DR: In this article, an active antenna configured to emit an RF signal, and to receive RF signals from the digital implants in response to the RF signal emitted by said antenna, is used for the identification and monitoring of animals with a digital implant.
Abstract: Tile for the identification and monitoring of animals with a digital implant, said tile comprising: - An active antenna configured to emit an RF signal, and to receive RF signals from the digital implants in response to the RF signal emitted by said antenna; - Means of communication configured to transmit to a remote digital terminal the RF signals of the digital implant received by the antenna; and - Means for the adjacent bonding of tiles with each other. Mesh for the identification and tracking of animals comprising at least two tiles. Animal identification and tracking system comprising: - A digital implant configured to be arranged in an animal and to receive RF signals and emit RF signals in response to a received RF signal; - A tile and/or a mesh according to the invention; and - A remote digital terminal configured to receive the RF signals.

Network Information
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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202148
2020113
2019123
201898
201789
2016102