Accuracy Analyses of Synthesized-Reference-Wave Holography for Determining Antenna Radiation Characteristics

Schejbal, Vladimír; Pidanič, Jan; Kovařík, Václav; Cermak, D.

doi:10.1109/map.2008.4768928

Cited by 24 publications

(17 citation statements)

References 9 publications

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“…• Since the antennas can be placed close to each other and the off-axis angle can be reduced, the size of the setup is decreased and the paths of the reference and AUT fields are similar, resulting in less sensitive setups to scanning errors and source instability [21,43].…”

Section: Modified Hologrammentioning

confidence: 99%

“…Despite the multiple advantages of conventional indirect off-axis techniques versus complex field measurements, such as robustness and cost reduction [21,43], and also versus other amplitude-only techniques based on iterative approaches, conventional indirect off-axis techniques exhibit several limitations, which are summarized next:…”

Section: Main Drawbacks and Limitations Of Indirect Off-axis Holographymentioning

confidence: 99%

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Indirect Off-Axis Holography for Antenna Metrology

Arboleya

Laviada

Ala‐Laurinaho³

et al. 2017

Holographic Materials and Optical Systems

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Phase acquisition in antenna measurement, especially at millimeter-and submillimeterwave 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-theart 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.

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Section: Modified Hologrammentioning

confidence: 99%

Section: Main Drawbacks and Limitations Of Indirect Off-axis Holographymentioning

confidence: 99%

Indirect Off-Axis Holography for Antenna Metrology

Arboleya

Laviada

Ala‐Laurinaho³

et al. 2017

Holographic Materials and Optical Systems

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“…Whilst the technique of off-axis indirect holography has found widespread use at optical frequencies, its use at microwave frequencies has been limited due to practical difficulties in producing the required radiated reference signal with linear phase gradient. A method of overcoming this difficulty by using a synthesized reference signal has previously been described for the determination of antenna radiation characteristics [1][2][3][4][5]. This work describes how indirect holographic techniques can be extended to provide complex scattered fields of passive objects and to reconstruct images of the original object.…”

Section: Indirect Microwave Holographymentioning

confidence: 99%

“…Indirect holography offers a simple and inexpensive technique for the determination of complex scattered fields using only scalar intensity measurements taken over a single aperture [1][2][3][4][5]. Such an arrangement does not require the use of vector measuring equipment and can be performed using basic power measuring devices.…”

Section: Introductionmentioning

confidence: 99%

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Investigations of resolution limits for indirect microwave holographic imaging

Yurduseven

Smith

Livingstone

et al. 2013

Int J RF and Microwave Comp Aid Eng

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This work describes how indirect holography which has previously been applied to the determination of antenna radiation patterns can be adapted for the imaging of passive objects. It provides details of how complex scattered field values can be obtained in a simple and inexpensive manner from sampled scalar intensity measurements taken over a single scanning aperture. This work uses indirect holographic techniques to image a number of simple objects including a rectangular metallic plate, a small metal plate covered by a dielectric sheet and a small metallic circular annulus. This work demonstrates that good quality images can be reconstructed from simple scalar intensity patterns. It demonstrates that clear outlines can be obtained in particular from reconstructed phase patterns and that good images can be obtained from objects with dimensions of the order of a half wavelength.

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Reflector Antennas

Schejbal

2021

Wiley Encyclopedia of Electrical and Electronics Engineering

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Reflector antennas have been still one of the best solutions to requirements for cost effective, high gain, high performance antenna systems and therefore have been used in various areas of electrical engineering, ranging from telecommunications and radars to deep‐space exploration and radio astronomy. Consequently, the majority of radar, ground station and spacecraft high gain antennas are reflector antennas. Different types are used such as plane, corner, singly and doubly curved, and single and multiple reflectors. That depend on applications, frequencies, polarizations, resulting radiation patterns, etc. Basic theoretical principles, analytical methods, numerical simulations, experimental results and various practical issues, which can facilitate the design of reflector antennas, are described. The more general design uses geometrical and physical optics. The generalized diffraction synthesis technique can be utilized to produce various radiation patterns such as pencil‐beams and contoured beams, and to enhance the radiation characteristics of an existing canonical or distorted system. The reliability and accuracy of analytical/numerical techniques have allowed employment of commercial or customized computer programs in the performance evaluation and design of reflector antennas considering various parameters such as sidelobe levels at far‐angular regions and cross‐polarization control.

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Accuracy Analyses of Synthesized-Reference-Wave Holography for Determining Antenna Radiation Characteristics

Cited by 24 publications

References 9 publications

Indirect Off-Axis Holography for Antenna Metrology

Indirect Off-Axis Holography for Antenna Metrology

Investigations of resolution limits for indirect microwave holographic imaging

Reflector Antennas

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