Dual-band System composed by a Photonics-based Radar and a Focal-Point/Cassegrain Parabolic Antenna

Brandão, T. H.; Filgueiras, H.R.D.; Alves, A. A. C.; Scotti, Filippo; Melo, Suzanne; Bogoni, Antonella; Cerqueira, S. Arismar

doi:10.1590/2179-10742018v17i41545

Cited by 4 publications

(4 citation statements)

References 18 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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“…Frequency selective surfaces, FSS, have attracted the attention of several research groups, both for simplicity of manufacture and for the diversity of applications [1]- [3]. Dual band antennas systems [4], [5], radomes [6], [7], electromagnetically smart buildings [8]- [10] and reconfigurable antennas [3], [11]- [13] are examples of FSS applications. Basically, a FSS is composed by a periodic array of unit cells, usually engraved on a dielectric substrate, designed to be transparent in some frequency bands, while reflecting or absorbing the others.…”

Section: Introductionmentioning

confidence: 99%

Recovering Suppressed Resonance Frequency by Bias Lines in Reconfigurable FSS

Neto

Silva

Fernandes

et al. 2021

J. Microw. Optoelectron. Electromagn. Appl.

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In reconfigurable frequency selective surface, FSS, bias lines can suppress a resonant frequency. This is a disadvantage, as it reduces a FSS potential application. In this paper, a procedure to recover the suppressed resonant frequency is described. A FSS based on four arms star geometry is considered and its reconfigurability is achieved by the use of varactors, for which bias lines suppress the polarization resonance. So, dipoles are added to the unit cell geometry recovering this resonance. In order to validate the proposed procedure, a reconfigurable FSS using the varactor SMV1231 ( . ≤ ≤ .) was fabricated and characterized. Numerical and measured results shown a good agreement, confirming that the FSS reconfigurability is preserved and the suppressed resonance recovered.

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“…Depending on the type of laser source employed, the radars adopting the microwave photonics technology can be divided into a pulsed radar applying a mode-locked laser (MLL) and a frequency modulated continuous-wave (FMCW) radar using continuous-wave (CW) laser [8][9][10][11][12]. A pulsed radar using an MLL can detect the lower radar cross-section (RCS) targets with the same power consumption compared to an FMCW radar.…”

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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Dual-band System composed by a Photonics-based Radar and a Focal-Point/Cassegrain Parabolic Antenna

Cited by 4 publications

References 18 publications

Multiband and Photonically Amplified Fiber-Wireless Xhaul

Multiband and Photonically Amplified Fiber-Wireless Xhaul

Recovering Suppressed Resonance Frequency by Bias Lines in Reconfigurable FSS

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

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