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A series feeding network with dispersion engineered compensation lines to reduce beam-squint radiation in linear antenna applications is investigated. The compensation lines are loaded in sections with left-handed and right-handed unit cells and branch off the main feed line. The signals from the branch points to the antenna elements are slowed down appropriately. Measurements of the radiation pattern...
Beam steering and beam shaping with parasitic array antennas pose a suitable alternative to expensive phased array technology. Parasitic array antennas mainly consist of one or few active antenna elements which are surrounded by passive elements. The parasitic reactances of the passive elements can be controlled either by electronic tuning or switching. Doing this in a suitable way different antenna...
This paper presents an S-band AESA antenna with inexpensive T/R-modules and a novel RF feeding network operation technique. The antenna ports of the front-end's feeding network have no isolation mechanisms, which can be problematic in case of not well matched T/R-modules. However, a novel operation is proposed, and the issue is overcome. A system demonstrator is presented, proving: the novel feeding...
In this work, a metaradome based on a fakir's bed of nails is designed and tested in order to suppress the blind directions of a 100-element antenna array. The antenna is a microstrip array designed to operate in X-band. The fakir's bed metamaterial-like was first approximated using analytical formulas before a full-wave numerical optimization. Experimental results are exposed and confronted to numerical...
Conformal and structure integrated antennas mounted on aircraft will play an increasingly important role in future wireless systems. Such antennas have advantages against conventional antenna design but are subject to vibrations and deformations caused e.g. by aerodynamic loads, vehicle motion or moving parts such as the turbine or jet engine. Effects of vibrations and deformations on the performance...
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