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eLibrary > PD IEC TR 63099-3:2022 Transmitting and receiving equipment for radiocommunication. Radio-over-fibre technologies for electromagnetic-field measurement - Antenna near-field pattern measurement using optical techniques in terahertz-wave bands >

PD IEC TR 63099-3:2022 Transmitting and receiving equipment for radiocommunication. Radio-over-fibre technologies for electromagnetic-field measurement - Antenna near-field pattern measurement using optical techniques in terahertz-wave bands, 2022

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PD IEC TR 63099-3:2022 Transmitting and receiving equipment for radiocommunication. Radio-over-fibre technologies for electromagnetic-field measurement - Antenna near-field pattern measurement using optical techniques in terahertz-wave bands, 2022

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CONTENTS
FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms, definitions and abbreviated terms [Go to Page]
3.1 Terms and definitions
3.2 Abbreviated terms
4 Practical examples of antenna near-field measurement using optical techniques in terahertz-wave bands [Go to Page]
4.1 Overview
Figures [Go to Page]
Figure 1 – Proposed measurement system
4.2 Non-polarimetric EO frequency down-conversion technique
Figure 2 – Schematic diagram and photograph of EO probe
Figure 3 – Principle of the non-polarimetric EO frequency down-conversion technique
4.3 Synchronous system based on a self-heterodyne technique [Go to Page]
4.3.1 General
4.3.2 Principle and system configuration
4.3.3 Example of near-field measurement
Figure 4 – Schematic diagram of the synchronous system based on the self-heterodyne technique [Go to Page]
4.3.4 Near-to-far field transformation results
Figure 5 – Near-field of the terahertz wave (310 GHz) measured by the synchronous system based on the self-heterodyne technique
Figure 6 – Measured rectangular-type horn antenna and EO probe
Figure 7 – Far-field pattern calculated from the near-field measured by the synchronous system
Figure 8 – Far-field pattern in the E-plane and H-plane
4.4 Asynchronous system based on a phase-noise cancelling technique [Go to Page]
4.4.1 General
4.4.2 Principle and system configuration
Table 1 – Radiation pattern characteristics measured by the synchronous system [Go to Page]
[Go to Page]
4.4.3 Example of near-field measurement
4.4.4 Near-to-far field transformation results
Figure 9 – Schematic diagram of the asynchronous system based on the phase noise cancelling technique
Figure 10 – Near-field pattern measured using the asynchronous system
4.5 Comparison between results obtained from synchronous and asynchronous systems
Figure 11 – Far-field pattern calculated from the near-field measured by the asynchronous system
Figure 12 – Far-field pattern in the E-plane and H-plane
Figure 13 – Far-field pattern calculated from the near-field measured by the synchronous system (a) and asynchronous system (b)
Figure 14 – Far-field pattern calculated from the near-field measured by the asynchronous system
Table 2 – Radiation pattern characteristics measured by the synchronous and asynchronous systems
Bibliography [Go to Page]

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PD IEC TR 63099-3:2022 Transmitting and receiving equipment for radiocommunication. Radio-over-fibre technologies for electromagnetic-field measurement - Antenna near-field pattern measurement using optical techniques in terahertz-wave bands, 2022

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