Topic
Active antenna
About: Active antenna is a research topic. Over the lifetime, 2246 publications have been published within this topic receiving 26493 citations.
Papers published on a yearly basis
Papers
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03 Apr 2016
TL;DR: A novel metric, to evaluate the cells performance, that consider several performance indicators, is introduced and a distributed CCO algorithm is proposed which has three distinct phases and results show significant improvement in the overall network performance.
Abstract: In order to enhance the Long Term Evolution (LTE) network performance, the Third Generation Partnership Project (3GPP) introduced Coverage and Capacity Optimisation (CCO) in the context of Self Organising Network (SON). Antenna parameters (i.e. azimuth, electrical tilt etc.) play a key role in CCO and have a significant impact on the users' Quality of Service (QoS). In this paper, a novel metric, to evaluate the cells performance, that consider several performance indicators, is introduced. Furthermore, a distributed CCO algorithm is proposed which has three distinct phases. The first phase is to determine the target cell, the second phase adjust the antenna parameters for the target and neighbouring cells and in the last phase the optimum antenna parameters for the target and neighbouring cells is determined. The simulation results show significant improvement in the overall network performance with the proposed CCO algorithm. In particular, the target cell average performance can be improved by 16.75%.
3 citations
Proceedings Article•
01 Mar 2019TL;DR: In this paper, the authors present a 5G mmWave antenna platform demonstrating a different approach based on Gap-wave technology, which is an integrated all-metal multi-layer assembly, offering low-loss feeding, high gain subarray, high-Q filters and exceptional thermal handling.
Abstract: mmWave frequencies offer unprecedented capacity but also new technical challenges. Current solutions typically adopt integrated PCB antennas, however they still face issues when it comes to coverage, power consumption and cost. Instead, we present a 5G mmWave antenna platform demonstrating a different approach based on Gapwaves technology. The proposed design is an integrated all-metal multi-layer assembly, offering low-loss feeding, high-gain subarray, high-Q filters and exceptional thermal handling. To support these claims, active measurement of beam steering, EIRP and temperature are presented. Results from this small demonstration unit are very encouraging and show performance challenging that of much larger systems.
3 citations
Patent•
10 Sep 2009
TL;DR: In this article, an integrated active antenna is provided to receive signals of dual frequency band at the same time by parallel connecting an open stub to an ending point of a feeding line of a planar monopole antenna.
Abstract: An integrated active antenna is provided to receive signals of dual frequency band at the same time by parallel connecting an open stub to an ending point of a feeding line of a planar monopole antenna. A dielectric substrate(10) has a first surface and a second surface. The first surface is faced with the second surface. An antenna(20) is formed on the first surface of the dielectric substrate. A first ground surface(30) and a second ground surface(32) are formed in both sides of a feeding line of the antenna. A via hole(40) electrically connects the first surface and the second surface of the dielectric substrate. A first signal output part and a second signal output part are formed on the second surface of the dielectric substrate. The first signal output part amplifies a first signal having a first center frequency among signals provided from the antenna. The second signal output part amplifies a second signal having a second center frequency among signals provided from the antenna. Input terminals of the first signal output part and the second signal output part are connected to the feeding line of the antenna through the via hole.
3 citations
16 Jun 2014
TL;DR: The requirements to achieve data rates beyond 100 Gbit/s in communication systems operating at W-band are presented and a link budget analysis shows the feasibility of the concept for multi-user short-range line-of-sight communications.
Abstract: This paper presents the requirements to achieve data rates beyond 100 Gbit/s in communication systems operating at W-band. The analysis assumes the underlying transmitter system to be implemented as an active antenna array which supports beam steering and polarization multiplexing over large bandwidths to achieve the high data rates. The envisaged technologies for the transceiver front-ends are CMOS for the active circuitry and a stereolithographic process for the integration of the chip sets into active antenna elements. Application scenarios are presented, and a link budget analysis shows the feasibility of the concept for multi-user short-range line-of-sight communications. The required beam steering angles and ranges of operation are taken into account together with the necessary signal-to-noise ratio and modulation order to obtain the minimum number of array elements. Lastly, the frequency dependence of the link budget shows that the performance is limited at the lower W-band. Efforts for performance improvement should thus target this frequency range.
3 citations
TL;DR: In this paper, the authors report about observations of the solar U+III bursts on 5 June of 2020 by means of a new active antenna designed to receive radiation in 4-70 MHz, which can serve as a prototype of the ultra-longwavelength radiotelescope for observations on the farside of the Moon.
Abstract: We report about observations of the solar U+III bursts on 5 June of 2020 by means of a new active antenna designed to receive radiation in 4-70 MHz. This instrument can serve as a prototype of the ultra-long-wavelength radiotelescope for observations on the farside of the Moon. Our analysis of experimental data is based on simultaneous records obtained with the antenna arrays GURT and NDA in high frequency and time resolution, e-Callisto network as well as by using the space-based observatories STEREO and WIND. The results from this observational study confirm the model of Reid and Kontar (2017).
3 citations