A fundamentally novel method to significantly improve return loss and radiation efficiency of closely spaced antenna elements is experimentally demonstrated and explained using electromagnetic principles. This method is based on the use of a new electromagnetic material that strongly modifies antennae mutual coupling. The design can be scaled in frequency from 1GHz up to 60GHz. A 7-element prototype of an electrically small monopole antenna array operating around 2.4GHz with footprint dimensions less than λ/2x λ/2, λ is a wavelength of radiation, will be submitted as a part of solution.
The developed concept of electrically small antenna arrays with enhanced radiation efficiency and improved return loss (antenna matching) can be applied in various wireless communication scenarios, including electrically compact MIMO terminals, reconfigurable smart antennas, accurate direction-of-arrival estimation, small antenna terminals for the wireless-enabled Internet-of-Things devices and antenna diversity applications. A simple yet robust beam forming algorithm requiring minimal signal processing will be also provided for the interested party.
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A fundamentally novel method to significantly improve return loss and radiation efficiency of closely spaced antenna elements is experimentally demonstrated and explained using electromagnetic principles. This method is based on the use of a new electromagnetic material that strongly modifies antennae mutual coupling. The design can be scaled in frequency from 1GHz up to 60GHz. A 7-element prototype of an electrically small monopole antenna array will be submitted as a part of solution.
The developed concept of electrically small antenna arrays with enhanced radiation efficiency and improved return loss (antenna matching) can be applied in various wireless communication scenarios, including electrically compact MIMO terminals, reconfigurable smart antennas, accurate direction-of-arrival estimation, small antenna terminals for the wireless-enabled Internet-of-Things devices and antenna diversity applications.
The concept properties are demonstrated below for the case of an electrically small 7-element monopole antenna array with a size of λ/2x λ/2x λ/6 (width x length x height), λ is a wavelength of radiation, and the inter-element antenna spacings less than λ/6.
For the developed antenna arrays, the typical return loss fractional bandwidth (at -10dB) is within the range 5%-15% and gain is 5-9 dBi with 360 degrees azimuthal steering capabilities. The antenna arrays' footprint do not exceed λ/2x λ/2 and inter-element antenna spacings are in the range of λ/10-λ/4.
The proposed idea can be applied to different types of electrically small antenna arrays including printed and 3D antenna arrays.
Current development status
Working prototypes
R&D and consultancy in microwave theory and measurement techniques, wireless communications and IoT .
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