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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TL;DR: The effect of the environment curvature on the sensing accuracy can be discussed by usung one non-dimensional parameter consisting of the pushing angle, the contact distance, and the radius of curvature of the object.
Abstract: The Artificial Active Antenna is the sensor system motivated by the insect's antenna. It can detect the location between an insensitive flexible beam and an object through measurement of the rotational compliance on the beam in contact with the object. The goal of this paper is to consider the effects of the environment curvature on the sensing accuracy. We first introduce a set of basic equations representing force-deformation and geometrical relationships. Both numerical and approximate solutions are shown with experimental results. We show that the effect of the environment curvature on the sensing accuracy can be discussed by usung one non-dimensional parameter consisting of the pushing angle, the contact distance, and the radius of curvature of the object. Finally, we show that the environment curvature makes little influence on the sensing accuracy.
1 citations
01 Dec 2012
TL;DR: In this article, the authors proposed a novel high gain active antenna array using dual-fed distributed amplifier (DA)-based composite right/left-handed (CRLH) leaky wave antennas (LWAs).
Abstract: In this paper, we propose a novel high gain active antenna array using dual-fed distributed amplifier (DA)-based composite right/left-handed (CRLH) leaky wave antennas (LWAs). Operating around 2.4GHz ISM-band, the active antenna array can achieve 16dBi gain at maximum, which has around 7dB gain increase compared with the single element dual-fed DA-based active antenna. The proposed active antenna array is also capable of beam-scanning, with respect to the frequency of the pass band of the antenna.
1 citations
Patent•
08 Jun 2016
TL;DR: In this paper, a three-dimensional active antenna based hybrid network interference coordination method is proposed to increase the average throughput of the cell and the throughputs of cell-edge users, but also decreases interference to cell edge users of adjacent cells.
Abstract: The invention provides a three-dimensional active antenna based hybrid network interference coordination method. The three-dimensional active antenna based hybrid network interference coordination method comprises the following steps of step S1, obtaining usable system resource information and priority information of corresponding system resources of adjacent base stations by a base station with a three-dimensional active antenna; step S2, sending the usable system resource information and the priority information of the corresponding system resources of the adjacent base stations to the adjacent base stations by the base station with the three-dimensional active antenna; and step S3, distributing system resources of the cells based on the usable system resource information and the priority information of the corresponding system resources by the adjacent base stations. The three-dimensional active antenna based hybrid network interference coordination method not only increases the average throughput of the cell and the throughputs of cell-edge users, but also decreases interference to cell-edge users of adjacent cells; and the throughput of the whole network system and the throughputs of the cell-edge users are increased.
1 citations
11 Sep 2000
TL;DR: In this paper, a two-element active antenna for optical scanning beam in X-band was proposed, where a MESFET in the element antenna works both as a negative resistance and an optically controllable reactance.
Abstract: This paper proposes a novel two-element active antenna for optical scanning beam in X-band. A MESFET in the element antenna works both as a negative resistance and an optically controllable reactance. Laser illumination to the MESFET in one of the antenna elements causes a shift of its free-running frequency and creates a phase difference between the oscillations of the two antenna elements; therefore, the radiation beam can be scanned. In experimental results, the beam direction has been scanned by 26 degrees optically.
1 citations
17 Sep 2020
TL;DR: Results show that coexistence is possible in real scenarios provided that adequate distance and angular separation is guaranteed between 5G networks and 5G and incumbent services.
Abstract: In this work spectrum sharing under novel authorisation regimes is investigated for 5G innovations in views of spectrum usage also for vertical applications. We mainly focus on the 26 GHz band recently harmonised for IMT at WRC-19 and on the 6 GHz band which has been identified among future candidate bands for IMT at next WRC23. Isolation between outdoor and indoor environments is considered as an enabler to share the spectrum and provide more bandwidth per operator in the same band. Co-channel coexistence analyses were performed based on the widely adopted Minimum Coupling Loss (MCL) methodology. The impact of active antenna systems (AAS) as a means to improve spectrum sharing is also investigated. Results show that coexistence is possible in real scenarios provided that adequate distance and angular separation is guaranteed between 5G networks and 5G and incumbent services.
1 citations