Measurement and evaluation techniques for an airborne active phased array antenna

Kojima, Naoya; Shiramatsu, Kuniaki; Chiba, Isamu; Ebisui, Takashi; Kurihara, Noriyuki

doi:10.1109/past.1996.566091

Cited by 12 publications

(5 citation statements)

References 10 publications

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“…Thus, to generate and measure multiple beams on the proposed massive MIMO array, amplitude and phase calibration is necessary to be conducted initially for each channel. The calibration method mainly includes the rotating-element electric vector (REV) method [47]- [49], the planar near-field calibration method, etc. For the planar near-field calibration method, high efficiency and accuracy can be guaranteed when the probe repositioning precision and the isolation between antenna elements are high enough.…”

Section: A Calibration Methods For Transmitting Arraymentioning

confidence: 99%

“…Since 1988, he has been with the State Key Laboratory of Millimeter Waves, Southeast University, where he has also been serving as the Director, since 2003, and is currently a Professor with the School of Information Science and Engineering. In 1993In , 1995In , 1996In , 1997In , and 1998, he was a short-term Visiting Scholar with the University of California at Berkeley and University of California at Santa Cruz. He has been engaged in numerical methods for electromagnetic problems, millimeter wave theory and technology, antennas, and RF technology for wireless communications.…”

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confidence: 99%

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A N260 Band 64 Channel Millimeter Wave Full-Digital Multi-Beam Array for 5G Massive MIMO Applications

et al. 2020

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In this paper, a 37-42.5GHz (N260 Band) 64 channel full-digital multi-beam array for 5G massive multiple input multiple output (MIMO) applications is developed. The multi-beam array is built on a time division duplexing (TDD) architecture in which the transmitter and receivers are independent and working separately to enable more flexible channel configuration and hardware distribution. The 64 antenna elements of the array are aligned in a way that 16 elements lie in the horizontal and 4 in the vertical direction to deliver higher beam resolution in the horizontal plane. By using cables of unequal lengths, the 16×4 antenna elements are connected to a cluster of 8 × 8 transmitters/receivers. The hardware design of the transmitters, receivers, antennas and other circuits is demonstrated, with excellent measured RF performance achieved. Furthermore, the calibration of the massive MIMO array is presented, and the influence of inequality of array feedlines on calibration accuracy in a wide bandwidth is analyzed and experimentally verified. Finally, experimental studies on single beam scanning, multiple concurrent beam generation and over-the-air (OTA) performance of the transmitting and receiving array have been done. Simulation and measurement results suggest that the array has an excellent beam-forming capability that supports beam steering and generation of multiple concurrent beams. The OTA test reveals that the array can provide high modulation and demodulation accuracy for communication.

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Section: A Calibration Methods For Transmitting Arraymentioning

confidence: 99%

mentioning

confidence: 99%

A N260 Band 64 Channel Millimeter Wave Full-Digital Multi-Beam Array for 5G Massive MIMO Applications

et al. 2020

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“…25. The REV method [25] has been applied for calibration in this work. The procedure of calibration is presented as follow:…”

Section: Calibrationmentioning

confidence: 99%

A Low-Profile 36-Element K-Band Active Phased Array for Ultra-Small Aperture Application

Luo

Ouyang

Chen³

et al. 2020

IEEE Access

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This paper presents a 36-element low-profile half-duplex K-band T/R phased array as a solution for the platform with limited aperture and space for the phased array. With the solution of micro-assembly presented in this paper, the height of the array is only 12.3 mm. To improve the phased array's performance in ultra-small aperture, multi-channel GaAs MMICs have been applied in this work. The array's scan angle could achieve ±50 • in both azimuth (H-plane) and elevation (E-plane). The EIRP and G/T of the array are 51dBm and-12.5dB/K respectively at the bandwidth from 21.5 GHz to 22 GHz. INDEX TERMS GaAs, half-duplex, K-band, low-profile, micro-assembly, multi-channel MMIC, phased array, ultra-small aperture.

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“…The self-calibration methods do not require auxiliary array elements, but they require high-dimensional nonlinear optimisation problems to be solved. The calculation complexity of the solving process is high, which increases the workload of the back-end algorithm processing [14][15][16][17][18]. Therefore, it is important to suppress the gain and phase errors on the receiving front end.…”

Section: Introductionmentioning

confidence: 99%

A signal separation method based on the subarray beam synthesis

Liu

Wang

Cui

et al. 2022

IET Radar Sonar & Navi

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Large‐scale arrays are widely used due to their advantages of high gain, high resolution, and strong beam control capability. The large number of antennas leads to a sharp increase in computational complexity, and thus, it is necessary to reduce the complexity of signal processing. A signal separation method is proposed based on subarray beam synthesis. This method can improve signal reception and separation performance through zero‐forcing calculation and realise system gain and phase error corrections in the front end of an antenna. Compared with back‐end processing, it has the advantage of low implementation difficulty. The feasibility and performance of the method are verified by simulations.

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Measurement and evaluation techniques for an airborne active phased array antenna

Cited by 12 publications

References 10 publications

A N260 Band 64 Channel Millimeter Wave Full-Digital Multi-Beam Array for 5G Massive MIMO Applications

A N260 Band 64 Channel Millimeter Wave Full-Digital Multi-Beam Array for 5G Massive MIMO Applications

A Low-Profile 36-Element K-Band Active Phased Array for Ultra-Small Aperture Application

A signal separation method based on the subarray beam synthesis

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