Method of multichannel calibration for unmanned aerial vehicle surveillance radar

Hou, Yanan; Shang, Hui; Yang, Ming; Jin, Cheng

doi:10.1049/joe.2019.0651

Cited by 1 publication

(2 citation statements)

References 8 publications

(7 reference statements)

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“…A CSN is designed for simultaneous excitation of multiple calibration lines to enable multi-element calibration to significantly reduce active array calibration time [13,14]. A general block diagram of the proposed design of CSN is shown in Fig.…”

Section: Calibration Switch Network (Csn)mentioning

confidence: 99%

“…Multi-element phased array calibration method by solving linear equations [9,10] is very complicated and simultaneously calibrates a maximum of eight elements; another computational extensive synthetic array calibration (SAC) scheme [11] offers only 1.7 times reduction in the calibration time compared to single element calibration methods [1]. The fast measurement technique for multi-element phased array calibration is presented in [12][13][14], which suffers from large measurement error and calibration accuracy. To achieve low root-meansquare error (RMSE) in multi-element calibration, these methods require multiple measurements and computationally extensive algorithms, thereby a significant increase in calibration time.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Demonstration and Performance Appraisal of Calibration Network for Multi-Element Calibration in Active Phased Array

Kumar¹,

Sreejith²,

Shreeshail³

et al. 2022

PIER M

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In active phased arrays, T/R module performance drifts due to active components' aging and thermal effect. Hence periodic online field calibration is required during the deployment of a radar system. This paper presents an innovative design of a precise and consistent calibration network consisting of a buried leaky coaxial cable (LCX) and a calibration switch network (CSN) for fast periodic field calibration of an active phased array. In the antenna plate, the leaky coaxial cables are buried within the wall of the cavity-backed antenna to realize calibration lines. A calibration switching network is realized using a 1 : 30 way Wilkinson power divider/combiner for simultaneous excitation of multiple calibration lines to characterize multiple radiating elements in the active array. An S-band (3.3 GHz ± 200 MHz) experimental active array with 64 T/R modules is configured and tested in the near-field test range (NFTR) to demonstrate the performance of the proposed calibration network. The presented scheme of simultaneous calibration of multiple radiating elements significantly reduces array calibration time and provides more flexibility to other multifunction radar functions. The availability of multiple receivers and non-overlapping RF beam forming networks in the radar system limits the improvement factor in array calibration time mentioned in this paper.

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Section: Calibration Switch Network (Csn)mentioning

confidence: 99%