Direct Antenna Modulator for m-QAM Applications

This paper introduces a concept for direct antenna modulation using a metasurface based antenna. The antenna can be controlled with the use of an external bias to control both the amplitude and phase of the transmitted signal, in a continuous way, to provide m-QAM direct antenna modulation. The DAM...

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Bibliographic Details
Published in2020 14th European Conference on Antennas and Propagation (EuCAP) pp. 1 - 3
Main Authors Ford, Kenneth L., Henthorn, Stephen, O'Farrell, Tim
Format Conference Proceeding
LanguageEnglish
Published EurAAP 01.03.2020
Subjects
Antennas
direct antenna modulation
Europe
metamaterials
Metasurfaces
Phase modulation
PIN photodiodes
Resistance
Transmitting antennas
Varactors
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DOI10.23919/EuCAP48036.2020.9135268

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Summary:This paper introduces a concept for direct antenna modulation using a metasurface based antenna. The antenna can be controlled with the use of an external bias to control both the amplitude and phase of the transmitted signal, in a continuous way, to provide m-QAM direct antenna modulation. The DAM comprises of five metasurfaces, four of which control the transmitted phase through the use of a varactor diode, and the fifth uses a PIN diode to control the transmitted phase. Numerical simulations are presented which show that the transmitted phase can be varied over a 360° range with a amplitude dynamic range of 25dB.
DOI:10.23919/EuCAP48036.2020.9135268