Indirect Off-Axis Holography for Antenna Metrology

Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review


Research units

  • University of Oviedo


Phase acquisition in antenna measurement, especially at millimeter- and submillimeter-wave frequencies, is an expensive and challenging task. The need of a steady phase reference demands not only a very stable source but unvarying temperature conditions and strong positioning accuracy requirements. Indirect off-axis holography is an interferometric technique that allows for characterization of an unknown field by means of a simple filtering process of the hologram or intensity interference pattern in the spectral domain, provided that the reference field, employed to interfere with the unknown field, is known in amplitude and phase. This technique can be used to avoid the effect of the errors related to the phase acquisition and to further develop new efficient and robust techniques capable of phase retrieval from amplitude-only acquisitions allowing for cost and complexity reduction of the measurement setup. A short review of the state-of-the-art in antenna metrology is presented in this chapter, as well as a description of conventional indirect off-axis techniques applied to this field. Last sections are devoted to the description of novel measurement techniques developed by the authors in order to overcome the main limitations of the conventional methods.


Original languageEnglish
Title of host publicationHolographic Materials and Optical Systems
EditorsIzabela Naydenova, Dimana Nazarova, Tsvetanka Babeva
Publication statusPublished - 2017
MoE publication typeA3 Part of a book or another research book

    Research areas

  • antenna measurement, antenna diagnostics, amplitude-only, interferometry, off-axis holography, indirect holography, phaseless, microwave holography, millimeter-wave, submillimeter-wave

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