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Progress In Electromagnetics Research Letters
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PHASE SHIFTING HOLOGRAPHY FOR THZ NEAR-FIELD/FAR-FIELD PREDICTION

By G. Junkin

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Abstract:
With a view to extending techniques for THz antenna near-field/far-field prediction, this communication derives general analytic expressions for calibrated phase shifting holography (PSH) and introduces a new 120ยบ three-step PSH method that avoids switching off the reference field and has symmetrical performance over the entire complex plane, providing spurious free far-field prediction. Numerical tests with simulated near-field patterns at 372GHz confirm the convenience of the method and give an indication of the precision required for the phase shifts.

Citation:
G. Junkin, "Phase Shifting Holography for THz Near-Field/Far-Field Prediction," Progress In Electromagnetics Research Letters, Vol. 44, 15-21, 2014.
doi:10.2528/PIERL13093006

References:
1. Junkin, G., T. Huang, and J. C. Bennett, "Holographic testing of terahertz antennas," IEEE Transactions on Antennas and Propagation, Vol. 48, No. 3, 409-417, 2000.
doi:10.1109/8.841902

2. Leith, E. N. and J. Upatnieks, "Reconstructed wavefronts and communication theory," JOSA, Vol. 52, No. 10, 1123-1128, 1962.
doi:10.1364/JOSA.52.001123

3. Gabor, D., "Microscopy by reconstructed wavefronts," Proc. Roy. Soc., Vol. A, 454-487, 1949.

4. Gabor, D. and W. P. Goss, "Interference microscope with total wavefront reconstruction," JOSA, Vol. 56, No. 7, 849-856, 1966.
doi:10.1364/JOSA.56.000849

5. Yamaguchi, I. and T. Zhang, "Phase-shifting digital holography," Optics Letters, Vol. 22, No. 16, 1268-1270, 1997.
doi:10.1364/OL.22.001268

6. Meng, X. F., et al., "Two-step phase-shifting interferometry and its application in image encryption," Optics Letters, Vol. 31, No. 10, 1414-1416, 2006.
doi:10.1364/OL.31.001414

7. Liu, J. P. and T. C. Poon, "Two-step-only quadrature phase-shifting digital holography," Optics Letters, Vol. 34, No. 3, 250-252, 2009.
doi:10.1364/OL.34.000250

8. Junkin, G., "Planar near-field phase retrieval using GPUs for accurate THz far-field prediction," IEEE Transactions on Antennas and Propagation, Vol. 61, No. 4, 1763-1776, 2013.
doi:10.1109/TAP.2012.2220324


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