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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Papers
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01 Jan 2007
TL;DR: In this paper, an aperture-coupled microstrip patch antenna whose resonant frequency can be tuned over (at least) one octave was presented. But the antenna design was not discussed.
Abstract: This paper presents an aperture-coupled microstrip patch antenna whose resonant frequency can be tuned over (at least) one octave. For that purpose, p.i.n diodes are integrated at specific locations inside an H-shape patch antenna strongly coupled to two parasitic elements. This new concept of frequency-agile antenna is validated experimentally up to 56 GHz. Two set of antenna prototypes have been fabricated. In the first case, the antennas are "passive": the p.i.n diodes are replaced by ideal short and open lines. Numerical and experimental results show that, over the whole frequency band (24.2 GHz - 50.6 GHz), the maximum variation of the antenna gain and the reflection coefficient are smaller than 2 dB and -11 dB, respectively. The second antenna configuration is active and operates from 10 GHz to 20 GHz. The design and biasing circuits are described and discussed. Measurements are in acceptable agreement with the simulations. (6 pages)
4 citations
Patent•
08 Mar 2018
TL;DR: Instrument Landing System (ILS) Localizer and Glideslope Simulator Training Stations using GPS and LASER Position Identification for Active Antenna Feedback and Radiation Pattern Simulation is designed to provide complete training for ILS maintenance technicians using a unique combination of hardware and software as discussed by the authors.
Abstract: Instrument Landing System (ILS) Localizer and Glideslope Simulator Training Stations using GPS and LASER Position Identification for Active Antenna Feedback and Radiation Pattern Simulation is designed to provide complete training for ILS maintenance technicians using a unique combination of hardware and software. GPS and LASER modules embedded in simulated antennas define the physical position of the antennas and custom software coverts that position along with adjustable transmitter and RF Power, Modulation, and Phase distribution settings into a wireless digital data stream that emulates an actual ILS signal when viewed in the field by a custom designed simulated ILS field receiver. The overall system is monitored and controlled through a central processor. Simulated test equipment is provided to measure field readings and transmitter settings.
4 citations
Patent•
11 Jul 2014
TL;DR: In this paper, a method and apparatus for transmitting an indication of cell coverage in a wireless communication system is provided, where a first eNodeB (eNB) transmits an indication which indicates cell coverage of an active antenna system (AAS) to a second eNB.
Abstract: A method and apparatus for transmitting an indication of cell coverage in a wireless communication system is provided. A first eNodeB (eNB) transmits an indication which indicates cell coverage of an active antenna system (AAS) to a second eNB. The indication may be one of a cell split/merge/remove indication.
4 citations
Patent•
27 Dec 2006
TL;DR: The utility model relates to an electronic device with a movable antenna, which comprises a device body and an antenna unit, wherein the antenna unit comprises an antenna fixing holder and a body arranged on the antenna fixed holder as mentioned in this paper.
Abstract: The utility model relates to an electronic device with a movable antenna, which comprises a device body and an antenna unit, wherein the antenna unit comprises an antenna fixing holder and an antenna body arranged on the antenna fixing holder One end of the antenna fixing holder is pivoted to the device body, and the antenna fixing holder can rotate between a retracting state and an out rotating state In the retracting state, the antenna fixing holder rotates towards the device body In the turning-out state, the antenna fixing holder rotates outwards the device body
4 citations
TL;DR: In this paper, an active sensor system motivated by the antenna of an insect is proposed, which can locate any contact point between the insensitive flexible beam and an object by applying an active motion to the beam.
Abstract: This paper proposes a new active sensor system (Active Antenna) which is motivated by the antenna of an insect. Insects use their antennae skillfully so that they can aviod hitting objects, while they are crawling, running, and even when they are staying still. The antenna can be characterized by its“flexibility”and“active motions”. The flexibility of the antenna may contribute to the reduction of the impulsive force which appears when the antenna contacts an object unexpectedly. Active motions may be useful for extending the sensing environment in a 3D space. While the antenna possesses all these inherent advantages, we propose a new active sensing system, in which both flexibility and active motions contribute essentially to the contact point sensing between the antenna and an obstacle. The sensor system consists of only four components, an insensitive flexible beam, a position sensor, a torque sensor, and an actuator. We show that this simple sensor system can locate any contact point between the insensitive flexible beam and an object by applying an active motion to the beam. We also show that this sensor system enables us to detect the shape of the object when it is mounted on the front part of a mobile robot.
4 citations