Microwave Photonic Array Radars

Pan, Shilong; Ye, Xingwei; Zhang, Yamei; Zhang, Fangzheng

doi:10.1109/jmw.2020.3034583

Cited by 84 publications

(26 citation statements)

References 116 publications

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“…Microwave photonics (MWP) have been widely used to develop new solutions for generation, processing, control, and transmission of radio frequency (RF) and microwave signals, for systems with high rates, low losses, and wide bandwidths 1 . This technology has been applied in radio‐over‐fiber systems (RoF), electronic warfare and radar systems, instrumentation, biomedical engineering, Internet‐of‐things (IoT), and industry 4.0 applications 2–7 …”

Section: Introductionmentioning

confidence: 99%

“…1 This technology has been applied in radio-over-fiber systems (RoF), electronic warfare and radar systems, instrumentation, biomedical engineering, Internet-of-things (IoT), and industry 4.0 applications. [2][3][4][5][6][7] However, in photonic-assisted microwave signal processing applications, like in MWP filters, optical modulation, and microwave frequency generation, 8,9 there are some intrinsic and undesirable effects in the external modulator, like bias stability, residual phase modulation, extinction ratio (ER), and modulation index deviation. 10,11 These effects can reduce the detected RF power level and generate harmonic distortions, which degrade the signal quality and spectral purity.…”

Section: Introductionmentioning

confidence: 99%

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Large signal analysis on microwave photonic generation using an asymmetric dual‐drive Mach–Zehnder modulator and with different modulation indices

Ferreira

Ribeiro

Spadoti

2022

Micro & Optical Tech Letters

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This paper proposes an exact closed‐form frequency domain analytical solution for large‐signal conditions to analyze a microwave photonic signal generator that employs external electro‐optic intensity modulation and direct detection. The detected power of the generated microwave signal was used to evaluate the effect of an asymmetric dual‐drive Mach–Zehnder modulator with finite extinction ratio and using different modulation indices. Considering these effects simultaneously, a full analysis of different bias and phase shifts is also theoretically investigated. The optimum modulation index that maximizes a desired generated microwave frequency is shown here. For a given generated harmonic, the modulation index increases by around 40%. Comparing with the ideal situation, that is, symmetric modulator and using equal modulation indices, for the same harmonic, there is a reduction of around 0.2 dB in the power level and an increase of around 10% in the modulation index to achieve maximum power.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Large signal analysis on microwave photonic generation using an asymmetric dual‐drive Mach–Zehnder modulator and with different modulation indices

Ferreira

Ribeiro

Spadoti

2022

Micro & Optical Tech Letters

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“…E LECTRONICALLY steerable antenna arrays are widely used in satellite communications [1], radar sensors [2], [3], and radio astronomy [4], [5] due to their attractive features such as high gain, fast and precise tracking capability, low-maintenance, and inertia-free beam scanning. Over the last three decades, significant effort has been devoted to improving the printed circuit board (PCB) technologies with a pervasive impact on the technical implementation of phased array antenna architectures.…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of a Novel Wide-Angle Scanning Stub-Loaded Cavity Array Element

Chaloun

Gruner

Menzel

2022

IEEE Open J. Antennas Propag.

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A novel design methodology is presented to mitigate scan blindness in cavity antenna arrays without the need for any changes on the radiating structure itself. For a first proof-of-concept demonstration, a fully PCB-compliant dual-polarized cavity element is loaded by vertical stubs to manipulate the dispersion characteristics in the aperture plane. In contrast with its conventional cavity antenna counterpart, the proposed stub-loaded unit cell element shows through scattering and eigenmode analysis that the vertical stubs may effectively enhance the antenna's wide-angle scan performance by preventing the onset of surface and leaky wave resonances. Owing to this additional design freedom, an element gain improvement of at least 1 dB is achieved, due to a truly TE and TM mode-free characteristic along the lateral directions. A dual-polarized 11×11 array prototype was implemented. The measurement results are in very good agreement with those obtained by full-wave simulations. The realized stub-loaded cavity element exhibits reflection coefficients lower than −10 dB with a very low inter-port coupling <−40 dB across the frequency range from 26.8 GHz to 32.7 GHz. Moreover, the co-polarized embedded elements are close to the ideal cos(ϑ)-pattern for 60°E-and H-plane scans from 28 GHz to 31.5 GHz without oversampling the aperture.INDEX TERMS Planar phased arrays, dual-polarized cavity antenna, scan blindness, SatCom on the move

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“…The generation and processing of microwave and mm-wave signals by optical means allow to exploit the advantages of photonics, such as low loss, high bandwidth and immunity to electromagnetic interferences [1]. MWP is a key technology to enable the realization of frequency conversion, reconfigurable filtering, phase shifting and true time delaying functions [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

“…It provides a continuously tunable microwave photonic phase shifter, which is the fundamental part used in PAA to perform photonic true time delay (TTD) in beamforming antennas [7]. True time delays are needed to obtain wide instantaneous bandwidth and beam squint-free operation of the PAA [3]. Tunable microwave photonic phase shifter can be implemented by properly profiting from self-gain modulation (SGM) and cross-gain modulation (XGM) in semiconductor waveguides [8][9].…”

Section: Introductionmentioning

confidence: 99%

Small-Signal Analysis in Two Calculation Sections and Experimental Validation of Up-Converted Coherent Population Oscillations in Semiconductor Optical Amplifiers

et al. 2021

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This paper presents theoretical and experimental analysis of up-converted coherent population oscillations (Up-CPO) in semiconductor optical amplifiers (SOAs) for tunable optical phase shift applications at high frequencies. The study of Up-CPO frequency response is carried out by a small-signal analysis of a SOA modeled by two calculation sections in order to better take into account the nonlinear effects such as the SOA gain saturation. We demonstrate that we can fully determine the dynamic parameters of Up-CPO from the experimental frequency response of an optical probe signal obtained by cross-gain modulation mechanism. The Up-CPO frequency responses are measured for three SOAs with different cut-off frequencies up to 18.45 GHz. We finally validate experimentally the obtained analytical frequency responses for the three SOAs over different operating points, each characterized by the corresponding optical gain.

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Microwave Photonic Array Radars

Cited by 84 publications

References 116 publications

Large signal analysis on microwave photonic generation using an asymmetric dual‐drive Mach–Zehnder modulator and with different modulation indices

Large signal analysis on microwave photonic generation using an asymmetric dual‐drive Mach–Zehnder modulator and with different modulation indices

Design and Analysis of a Novel Wide-Angle Scanning Stub-Loaded Cavity Array Element

Small-Signal Analysis in Two Calculation Sections and Experimental Validation of Up-Converted Coherent Population Oscillations in Semiconductor Optical Amplifiers

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