| Millimeter-Wave Far-Field Range Antenna Measurement System for a W-Band Monopulse Antenna |
In-June Hwang1 
, Jong-Gyun Baek2
, Jaesik Kim3
, Jeong-Il Park1
, Dae-Chan Kim1
, Heeduck Chae2
, No-Weon Kang1
, Chihyun Cho1
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1Eelectromagnetic Wave Metrology Group, Korea Research Institute of Standards and Science, Daejeon, Korea
2Microwave and Antenna R&D, LIG Nex1, Yongin, Korea
3Agency for Defense Development, Daejeon, Korea |
Correspondence:
No-Weon Kang,Email: nwkang@kriss.re.kr
Chihyun Cho,Email: chihyun.cho@kriss.re.kr
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Received: 25 September 2023 • Revised: 11 January 2024 • Accepted: 18 February 2024 |
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| Abstract |
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In this study, a millimeter-wave far-field range antenna measurement system is proposed for W-band monopulse antenna measurements. Since the W-band monopulse antenna installed in radar systems has many input/output ports, multiple calculations are required to measure all the ports. We propose a system structure capable of the simultaneous measurement of multiple channels to quickly and accurately measure the performance of a monopulse antenna. The proposed measurement system includes a multi-channel rotary joint, a pair of diplexers, and multiple vector network analyzer extenders. In addition, an RF sub-system is implemented to reliably measure the phase of the W-band radiation pattern. It utilizes a shared local oscillator source and external power amplifiers for the transmit and receive paths. Employing the proposed multi-channel antenna measurement system, the sum/difference channels of a monopulse antenna were simultaneously measured according to the azimuth angle. In addition, a comparison of the far-field measurements provided by the proposed system and the near-field measurements was conducted. |
| Key words:
Antenna Measurements, Far-Field Radiation Pattern, Millimeter-Wave Measurements, Millimeter-Wave Radar, Monopulse Antennas |
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