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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01 Jan 1983
TL;DR: A planar active antenna array design combines miniature beryllia amplifiers using batch process techniques with an open-celled microstrip antenna was developed and tested in this paper, which is a thin, very light active antenna subarray using these technologies.
Abstract: A planar active antenna array design combines miniature beryllia amplifiers using batch process techniques with an open-celled microstrip antenna. A thin, very light active antenna subarray using these technologies has been developed and tested.
4 citations
03 Jun 2007
TL;DR: In this article, a design method for phased arrays based on coupled oscillators, radiating the second harmonic is proposed, where oscillators are coupled at the fundamental frequency, and radiation of the second harmonics allows for extended scanning range.
Abstract: A design method for phased arrays based on coupled oscillators, radiating the second harmonic is proposed. The oscillators are coupled at the fundamental frequency, and radiation of the second harmonic allows for extended scanning range. A model of the array steady state is developed based on a first order perturbation of the free-running single element steady state, taking into account both harmonics. Stability analysis based on the two harmonic model is also performed. The model parameters can be easily calculated from a harmonic balance analysis of the single array oscillator element only. The proposed methodology is applied to the design of a three element active antenna oscillator array radiating the second harmonic at 8.6 GHz.
4 citations
01 Oct 2003
TL;DR: A novel method is introduced to determine the gain and phase inequalities in antenna arrays that are caused by active components that avoids a symmetric divider network and therefore can be easily applied to two-dimensional, not equally spaced or non-planar arrays.
Abstract: A novel method is introduced to determine the gain and phase inequalities in antenna arrays that are caused by active components. This method makes use of the reciprocity of a single transmission line that propagates a calibration signal to all elements. This approach avoids a symmetric divider network and therefore it can be easily applied to two-dimensional, not equally spaced or non-planar arrays. An estimation of the systematic error is given. The concept is experimentally verified.
4 citations
15 May 2011
TL;DR: This paper demonstrates that the "Vodafone Single RAN Active Antenna" is now a reality and an analysis of the key capabilities of the product are described realising Mobile Broadband Network in the most efficient way.
Abstract: Users demand evermore advanced and increased capabilities in their devices, but the corresponding infrastructure deployment is often rejected due to the visual impact and ecological footprint that this entails. "Vodafone Single RAN Active Antenna" is a revolutionary innovation that makes possible the Best Mobile Broadband Networks reducing visual impact and carbon emissions, whilst also increasing flexibility of network deployment e.g. the support of several frequency bands across different standards (GSM, W-CDMA, LTE). This paper demonstrates that the "Vodafone Single RAN Active Antenna" is now a reality ., An analysis of the key capabilities of the product are described realising Mobile Broadband Network in the most efficient way. In addition various aspects of the product's performance - within a live operation network - are detailed.
4 citations
01 Oct 1990
TL;DR: In this article, a design procedure which assures the realization of optimized n-way radial line dividers is proposed and the corresponding design charts are given, and good agreement between experimental and theoretical data from different sources is demonstrated.
Abstract: The planar realization of beam forming networks for active antenna systems in satellite communication requires small and high performance power splitters. The microstrip radial line power divider seems to be a suitable structure for this purpose, because, under certain hypothesis, insures an equiphase and equiamplitude power splitting. A design procedure which assures the realization of optimized n- way radial line dividers is proposed and the corresponding design charts are given. Moreover good agreement between experimental and theoretical data from different sources is demonstrated.
4 citations