| Paper Abstract and Keywords |
| Presentation |
2023-10-10 15:35
[Poster Presentation]
Study on Near-Field Amplitude Distribution Applicable to Planar Scanning NFFFT (Near-Field to Far-Field Transformation) for Horn Antenna
So Ema, Genma Hattori, Issei Watanabe, Kondo Motoya, Yuta Horie (MWF) |
| Abstract |
(in Japanese) |
(See Japanese page) |
| (in English) |
The measurement of radiation directivity for antennas with a very large aperture relative to the wavelength is difficult to evaluate with conventional DFF (Direct-Far Field) measurements because the far-field region is very long, so IFF (Indirect Far Field) measurements are used. IFF measurements of radiation directivity are attracting attention because they are space-saving and can be performed in a small space. The simplest IFF-based measurement that can be configured is the Near-Field to Far-Field Transformation (NFFFT) using planar scanning. However, because the NFFFT algorithm integrates the amplitude of the near field and converts it to the far field, it is sometimes difficult to scan a wide enough amplitude range for the near field measurement by planar scanning, and the conversion results do not match those of antennas with broad directivity. It is universally known that if the value of Pk-Pk of the amplitude of the neighbor field is about 45 dB, the plane-scanning NFFFT can correctly convert the radiated directivity, but when the plane-scanning NFFFT was applied to an antenna with a broad radiated directivity in the range where the amplitude of Pk-Pk was 45 dB in actual measurement, the result did not match the radiated directivity of the DFF . Therefore, We proposed a method to evaluate the approximate curve that represents the amplitude distribution of the neighborhood by a frequency distribution and approximates it by a Gaussian distribution, and examined whether the results are consistent with the DFF results. The target antennas were standard gain horn antennas (SGH) of 15 dBi, 20 dBi, and 25 dBi at 28 GHz, and the validity of the proposed evaluation method was examined by evaluating the distribution of the near field through numerical analysis and actual measurements. |
| Keyword |
(in Japanese) |
(See Japanese page) |
| (in English) |
DFF / IFF / NFFFT / Planer Scanning / Millimeter Wave / / / |
| Reference Info. |
IEICE Tech. Rep. |
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| Conference Information |
| Committee |
MIKA |
| Conference Date |
2023-10-10 - 2023-10-12 |
| Place (in Japanese) |
(See Japanese page) |
| Place (in English) |
Okinawa Jichikaikan |
| Topics (in Japanese) |
(See Japanese page) |
| Topics (in English) |
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| Paper Information |
| Registration To |
MIKA |
| Conference Code |
2023-10-MIKA |
| Language |
Japanese |
| Title (in Japanese) |
(See Japanese page) |
| Sub Title (in Japanese) |
(See Japanese page) |
| Title (in English) |
Study on Near-Field Amplitude Distribution Applicable to Planar Scanning NFFFT (Near-Field to Far-Field Transformation) for Horn Antenna |
| Sub Title (in English) |
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| Keyword(1) |
DFF |
| Keyword(2) |
IFF |
| Keyword(3) |
NFFFT |
| Keyword(4) |
Planer Scanning |
| Keyword(5) |
Millimeter Wave |
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| 1st Author's Name |
So Ema |
| 1st Author's Affiliation |
Microwave Factory Co.,Ltd. (MWF) |
| 2nd Author's Name |
Genma Hattori |
| 2nd Author's Affiliation |
Microwave Factory Co.,Ltd. (MWF) |
| 3rd Author's Name |
Issei Watanabe |
| 3rd Author's Affiliation |
Microwave Factory Co.,Ltd. (MWF) |
| 4th Author's Name |
Kondo Motoya |
| 4th Author's Affiliation |
Microwave Factory Co.,Ltd. (MWF) |
| 5th Author's Name |
Yuta Horie |
| 5th Author's Affiliation |
Microwave Factory Co.,Ltd. (MWF) |
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| Speaker |
Author-1 |
| Date Time |
2023-10-10 15:35:00 |
| Presentation Time |
90 minutes |
| Registration for |
MIKA |
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