Coherent dual‐band radar system based on a unique antenna and a photonics‐based transceiver

Brandão, T. H.; Scotti, Filippo; Filgueiras, H.R.D.; Alves, Andreia Aparecida de Castro; Onori, Daniel; Melo, Suzanne; Bogoni, Antonella; Sodré, Arismar Cerqueira

doi:10.1049/iet-rsn.2018.5046

Cited by 11 publications

(8 citation statements)

References 22 publications

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“…At DU, RF 1 and RF 2 have been recovered by using a wideband photodetector (PD), amplified by the electrical amplifier 1 (EA 1 ) with 24 dB gain and then separated by using a diplexer. Additionally, RF 1 and RF 2 have been individually amplified using narrowband purely-electrical amplifiers (EA 2 and EA 3 with 20-and 35-dB gain, respectively), before feeding a frequency selective surface (FSS)-based dual-band parabolic antenna (DBPA) [36], [37] for simultaneous radiation. Posterior, a 10-m dual-band wireless FH has been implemented as a proof-of-concept.…”

Section: Dual-band and Photonically Amplified Fiwi 5g Xhaul Implementioning

confidence: 99%

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Multiband and Photonically Amplified Fiber-Wireless Xhaul

et al. 2020

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We propose and report the implementation of a multiband and photonically amplified fiberwireless (FiWi) Xhaul based on radio over fiber (RoF) technology and four-wave mixing (FWM) nonlinear effect, aiming 5G applications. The proposed ultra-wideband approach enables to simultaneously transport and amplify multiple radiofrequency (RF) signals through optical links, which might be employed as backhaul, midhaul or fronthaul of cellular systems. The FWM effect, originated from the use of 35m highly nonlinear fiber piece, gives rise to RF gain, when compared to conventional RoF (CRoF) systems. We demonstrate our technique allows replacing two conventional RF amplifiers with enhanced digital performance and/or significantly increasing the system throughput in 2.4 times, attaining 12 Gbit/s. Furthermore, a dual-band (7.5 and 28.0 GHz) wireless fronthaul, preceded by a 12.5-km optical midhaul, illustrates the multiband and photonically amplified FiWi Xhaul, by means of providing performance in terms of root mean square error vector magnitude (EVM RMS) in accordance to the 3GPP recommendations and at low phase noise level. INDEX TERMS 5G networks, four-wave mixing, microwave photonics, optical-wireless networks.

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Section: Dual-band and Photonically Amplified Fiwi 5g Xhaul Implementioning

confidence: 99%

“…The FSS-based DBPA has been proposed by our research group as a technical solution for extremely high capacity wireless fronthauls, by means of simultaneously transmitting two frequency bands at high gain [36], [37]. Fig.…”

Section: Dual-band and Photonically Amplified Fiwi 5g Xhaul Implementioning

confidence: 99%

Multiband and Photonically Amplified Fiber-Wireless Xhaul

et al. 2020

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“…In this way, it became possible to accommodate a focal-point and a Cassegrain antennas in the same structure. We have recently applied their idea to develop a similar antenna based on crossed-dipoles for S-and X-bands, aiming dual-use/dual-band radar applications [25]. Now, we assert to design a new unit, with FSS based on circular radiating element, for the 7.5 and 28 GHz bands, with the advantage of less susceptibility to incident angle variations.…”

Section: Fss-based Focal-point/cassegrain Antennamentioning

confidence: 99%

“…We have also proposed dual-band SWAAs for eMBB applications in mm-waves [24]. Finally, a dual-band focal-point/Cassegrain parabolic antenna based on frequency selective surface (FSS), operating in the S-and X-bands, was described in [25].…”

Section: Introductionmentioning

confidence: 99%

Dual-Band Wireless Fronthaul Using a FSS-Based Focal-Point/Cassegrain Antenna Assisted by an Optical Midhaul

et al. 2019

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This work reports the concept and implementation of a dual-band wireless fronthaul (FH), using a frequency selective surface (FSS)-based focal-point/Cassegrain antenna, assisted by an optical midhaul (MH). Our innovative fiber-wireless architecture enables to achieve simultaneous and extendedreach transmission over two distinct bands, namely C-and Ka-bands. The dual-band wireless FH is ensured by employing a dual-band antenna, consisting of a conventional main reflector (paraboloid) and a subreflector based on a frequency selective surface, which allows integrating a focal-point and a Cassegrain system in the same structure. It presents gain from 30 to 39.4 dBi and bandwidth from 1.1 to 4.3 GHz at 7.45 and 28 GHz, respectively. The optical MH relies on applying a dual-drive Mach-Zehnder modulator for simultaneously modulating both RF signals at the same wavelength and distribute them through a 25 km fiber optical link. Finally, the RF carriers at 7.5 and 28 GHz are radiated by the FSS-based antenna over dozens of meters wireless link. Experimental results demonstrate throughput up to 18 Gbit/s with error vector magnitude in accordance to the 3GPP Release 15 requirements, giving rise to a potential technological solution for increasing the system range, as well as reducing capital expenditure costs, footprint, weight and complexity.INDEX TERMS 5G, antennas, microwave photonics, mm-waves and telecommunications.

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“…Therefore, in order to prevent the generation of thermal noise, an additional cooling system is required, which results in increasing the volume of the system [14][15][16][17]. For these reasons, the previous studied of the photonic-based pulsed radars with an MLL is mainly focused on for long-range target detection, and the acquisition of high-resolution ISAR images has been studied in photonic-based FMCW radars with a CW laser source [8,9,[18][19][20][21][22][23][24]. According to the results of the previous studies, the photonic-based pulsed radar with MLL can replace the conventional electronic-based shipborne radar or airborne radar, and the photonic-based FMCW radar with CW laser can be applied to automobiles, distance measurement, or missile fuses.…”

Section: Introductionmentioning

confidence: 99%

X-Band Photonic-Based Pulsed Radar Architecture with a High Range Resolution

Bae

Shin

et al. 2020

Applied Sciences

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In this paper, we propose an X-band photonic-based pulsed radar architecture with a high range resolution. The proposed architecture is operated as a pulsed radar by adding a Mach-Zehnder modulator (MZM) operating as an optical switch to a transmitter of a conventional photonic-based frequency-modulated continuous wave (FMCW) radar. In addition, a balanced photodetector (BPD) is employed to enhance the amplitude of the received signal and remove common-mode noise. A proposed photonic-based pulsed radar prototype is implemented to operate at a center frequency of 10 GHz, a bandwidth of 640 MHz, and a pulse repetition frequency (PRF) of 1 kHz considering the performances of an arbitrary waveform generator (AWG). The implemented prototype is verified through an indoor experiment. As a result, the positions of targets are detected in real-time with 1.6% error rates of a range accuracy and obtained the range resolution of 0.26 m.

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Coherent dual‐band radar system based on a unique antenna and a photonics‐based transceiver

Cited by 11 publications

References 22 publications

Multiband and Photonically Amplified Fiber-Wireless Xhaul

Multiband and Photonically Amplified Fiber-Wireless Xhaul

Dual-Band Wireless Fronthaul Using a FSS-Based Focal-Point/Cassegrain Antenna Assisted by an Optical Midhaul

X-Band Photonic-Based Pulsed Radar Architecture with a High Range Resolution

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