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
More filters
22 Jun 2003
TL;DR: In this paper, a novel H-shaped oscillating patch antenna is proposed, which can serve as a filter, an output matching circuit, and a harmonic tuner in addition to being a load and a radiating element.
Abstract: A novel H-shaped oscillating patch antenna is proposed. In this approach, the H-shaped antenna can serve as a filter, an output matching circuit, and a harmonic tuner in addition to being a load and a radiating element. A prototype is designed, fabricated and tested at 3.65 GHz. Measurement results reveal a 41 dB rejection in the second harmonic radiation. Compared to the one using a rectangular patch, our design shows a size reduction of up to 30%. This active antenna is shown to be a good candidate as an element for a highly compact oscillating array for power combining and radar applications.
8 citations
Patent•
30 Jan 2013
TL;DR: In this article, a method and a device for regulating downward inclination by an active antenna was proposed, which consists of increasing the upstream-downstream downward inclination angle according to a predetermined step length until the acquire key performance indicator (KPI) does not rise.
Abstract: The invention discloses a method and a device for regulating downward inclination by an active antenna. The method comprises the following steps: successively increasing the upstream-downstream downward inclination angle according to a predetermined step length until the acquire key performance indicator (KPI) does not rise, and carrying out first parameter backspacing operation; after carrying out the first parameter backspacing operation, successively reducing the upstream-downstream downward inclination angle according to a predetermined step length until the acquired KPI does not rise, and then carrying out the second parameter backspacing operation; and after carrying out the second parameter backspacing operation, fixing the downstream downward inclination of the antenna, and successively reducing the upstream downward inclination angle according to a predetermined step length until the cell edge covering performance is not improved. By the method and device, the network can be optimized automatically, the characteristic of the active antenna can be effectively utilized, and the problems of resource consumption by manual optimization and low speed and inaccuracy are solved.
8 citations
Patent•
07 Aug 2009
TL;DR: In this paper, a modular active antenna for multiple broadcast signals was proposed, consisting of an internal antenna, an active module, and a printed circuit board, which can receive multiple broadcast frequency signals through a single active antenna.
Abstract: The present invention relates to a modular active antenna for receiving multiple broadcast signals. The modular active antenna includes an internal antenna, an active module and a printed circuit board. The internal antenna is formed in a polyhedral shape having an open bottom surface and configured to receive multiple broadcast frequency signals. The active module is arranged below the internal antenna to constitute a single module together with the internal antenna and is configured to selectively perform impedance matching on any one of the multiple broadcast frequency signals received by the internal antenna. The printed circuit board is configured to allow the internal antenna and the active module to be mounted thereon and is provided with a ground surface formed on the bottom thereof. Therefore, the present invention is advantageous in that it can receive multiple broadcast frequency signals through a single active antenna.
8 citations
01 Nov 2019
TL;DR: In this paper, an approach based on neural networks is proposed for diagnosing the faulty antenna elements remotely from the receiver side, where signals captured from various fault scenarios are used to train a 4layered feed forward neural network using amplitude and phase data.
Abstract: It can be extremely mission-critical to identify the source of an error in satellite communication systems and in this initial work an approach based on neural networks is proposed for diagnosing the faulty antenna elements remotely from the receiver side. A simple active antenna array which consists of four power amplifiers and a four-by-one linear antenna array has been considered in this work for proof of concept. Signals captured from various fault scenarios are used to train a 4layered feed-forward neural network using amplitude and phase data. The validation results show that the trained neural network can correctly identify the fault power amplifier with an accuracy higher than 96 %, which indicates the promising potential of the proposed approach.
8 citations
Patent•
30 May 2014TL;DR: In this article, the authors proposed a dynamic antenna switching based on weighted signal to noise ratio (SNR) calculated at each active antenna, where an antenna-specific weight may be applied to each antenna's SNR.
Abstract: Dynamic antenna switching based on weighted signal to noise ratio (SNR). A wireless device may include multiple antennas. SNR at each active antenna may be calculated. An antenna-specific weight may be applied to each antenna's SNR. The antenna-specific weights may further be radio specific and/or transmit or receive specific in some cases. Antenna selection (possibly just for a specific radio and/or for transmit or receive operations, depending on the specificity of the antenna weights), including potentially switching which antenna is used, may be based on the resulting weighted SNR values for each antenna. If the antenna-specific weights are radio specific and/or transmit or receive operation specific, the method may be performed multiple times with different antenna-specific weights to select antenna(s) for different radios and/or for other operations.
8 citations