An Efficient Scheduling for Fast Calibration of Digital Beamforming Active Phased Array Radar

Rousta, B.; Naser-Moghadasi, M.; Arand, Bijan Abbasi; Sadeghzadeh, R. A.

doi:10.1080/03772063.2019.1610513

Cited by 3 publications

(4 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In some large phased array antennas, unlike the near-field scanning method with a moveable probe antenna, one or several fixed probe antennas are placed at the periphery of the array [50][51][52][53][54], or moving platform such as a balloon or unmanned aerial vehicle (UAV) [55,56]. In [57], calibration is made by external fixed probe antennas at certain locations near the array.…”

Section: B the Peripheral Fixed Probe Methodsmentioning

confidence: 99%

“…These calibration methods vary from different systems and applications, either suitable for factory test or for in-field test [41]. Some methods such as the near-field scanning probe method and the peripheral fixed probe method require additional equipments [42][43][44][45][46][47][48][49][50][51][52][53][54][55][56][57][58][59][60], while the mutual coupling method takes advantage of the inherent property of the phased array without the need for extra hardware [61][62][63][64][65][66][67][68][69][70][71]. For Si-based integrated phased array antenna, it's very common to design a dedicated coupling network that using transmission lines connected to each antenna element for periodic in-field calibration [72][73][74][75][76][77][78][79][80][81][82][83][84][85][86]…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Impact Analysis and Calibration Methods of Excitation Errors for Phased Array Antennas

Gao

Zhang

2021

IEEE Access

View full text Add to dashboard Cite

Phased array antennas have played a very important role in many different areas and applications. It requires precise excitation of each antenna element by various synthesis techniques to obtain desired array pattern features. However, due to reasons such as manufacturing imperfections, component aging, and temperature variation, the realistic antenna element excitation inevitably differs from their expected values in practice. This paper presents a tutorial-like review to deal with excitation errors for phased array antennas. Two kinds of analysis methods, probabilistic methods and interval arithmetic (IA) based methods, are presented to evaluate the effects of excitation errors for phased array antennas. State-ofthe-art calibration methods along with various signal processing techniques are reviewed, their advantages and challenges are discussed in a comparative manner. Some other common errors and open research directions are also presented.INDEX TERMS Phased array antenna, excitation error, interval arithmetic, array calibration.

show abstract

Section: B the Peripheral Fixed Probe Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Impact Analysis and Calibration Methods of Excitation Errors for Phased Array Antennas

Gao

Zhang

2021

IEEE Access

View full text Add to dashboard Cite

show abstract

“…In the literature, there are found four calibration methods to deal with this problem 24,25 . They are classified as near‐field scanning probe, 26,27 mutual coupling method, 28–31 peripheral fixed probe, 32–35 and built‐in network method 36–41 …”

Section: Introductionmentioning

confidence: 99%

“…The system alignment based on near‐field scanning probe explores the coupling between the array elements and a moving probe fed by a reference signal 26,27 . On the other hand, the peripheral fixed probe method employs one or various fixed probes at the periphery of the array to create a reference signal for the beamformer calibration 32–35 . The mutual coupling method, in turn, uses the mutual coupling between the array radiators to perform the calibration 28–31 .…”

Section: Introductionmentioning

confidence: 99%

Closed‐loop controlled microwave beamformer

Fabiani

Oliveira

Vieira

et al. 2021

Int J RF Mic Comp-Aid Eng

View full text Add to dashboard Cite

This article presents the design and tests of a closed‐loop controlled microwave beamformer for phased arrays. The proposed circuit owns an internal reference signal used to automatically set predefined amplitudes and phases of the beamformer branches. This signal is applied to the branches through directional couplers with high directivity and propagates in them similar to the actual signals coming from the antenna array. As a consequence of this architecture, we found that the impedance mismatch between the antennas and the beamformer as well as the mutual coupling in the array is taken into account during calibration, resulting in a more accurate adjustment of amplitudes and phases. In this work, the influence of the mutual coupling between the antennas and the directivity of the couplers on the beamforming calibration uncertainty is also analyzed. From the derived uncertainties, the corresponding pattern degradation is evaluated by performing Monte Carlo simulations. It is shown that using couplers with low directivity together with tightly coupled arrays can produce undesirable main lobe squints of up to 4.5°, main lobe level deviations of up to 4.2 dB, and side lobe level variations of up to 24 dB. On the other hand, the use of high directivity couplers can mitigate these problems. Lastly, the validation of the designed circuit is conducted in two stages: bench tests and measurements in an anechoic chamber with an array of six printed monopoles operating at 2.2 GHz. Amplitude and phase calibration errors less than 0.5 dB and 3°, respectively, were observed in the bench tests.

show abstract

Design of a beam steering antenna array using 8x8 butter matrix for indoor positioning system

Duyen

Thảo

et al. 2020

Electromagnetics

View full text Add to dashboard Cite

An Efficient Scheduling for Fast Calibration of Digital Beamforming Active Phased Array Radar

Cited by 3 publications

References 9 publications

Impact Analysis and Calibration Methods of Excitation Errors for Phased Array Antennas

Impact Analysis and Calibration Methods of Excitation Errors for Phased Array Antennas

Closed‐loop controlled microwave beamformer

Design of a beam steering antenna array using 8x8 butter matrix for indoor positioning system

Contact Info

Product

Resources

About