A Silicon Photonics Automatically-Tunable mm-wave Remote Antenna Unit

Rady, Ramy; Madsen, C.K.; Palermo, Samuel; Entesari, Karman

doi:10.1109/mwp54208.2022.9997602

Cited by 2 publications

(2 citation statements)

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“…The signal is then passed through the MZM driver to optimally drive the MZM [13] for E-O conversion. However, optical intensity modulation generates an image of the modulated 25-45-GHz mm-wave signal around the desired wavelength after the MZM [14]. To remove the image, a SiP mm-wave re-configurable BPF with an FSR of 50 GHz and a bandwidth of 5 GHz is used.…”

Section: Rau System Architecturementioning

confidence: 99%

“…Therefore, a calibration step is initially needed before measurements. Subsequently, by positioning all rings at null points, the corresponding response in the all-pass filter (APF) configuration [14] is illustrated in Figure 6(c) (red). The loss variation (<0.1 dB in-band) with respect to wavelength can be ascribed to the grating coupler's characteristics.…”

Section: Photonic Measurements and Calibrationmentioning

confidence: 99%

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Ultra-Wideband mm-wave Remote Antenna Unit for Radio-over-Fiber Distributed Antenna Systems in Silicon Photonics

Rady,

Madsen,

Palermo

et al. 2024

Preprint

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This article presents a novel chip-scale 25-45-GHz re-configurable mm-wave remote antenna unit (RAU) for radio over fiber (RoF) distributed antenna systems. The proposed RAU architecture optimizes energy efficiency by operating directly at mm-wave frequencies, and spectral efficiency by selecting re-configurable RF photonic filters topology. Additionally, it achieves frequency agility by rejecting interferes and a small form factor by utilizing SOI photonics process. Two photonic integrated circuits (PICs) that act as downlink and uplink units are presented while occupying a total area of 12.33 mm$^2$. The downlink selects a single channel within the desired frequency range, while the uplink rejects up to four interferes. The building blocks of the proposed architecture are discussed and their design consideration and parameters are shown. Then, a comprehensive system analysis of the proposed RAU architecture including key performance indicators is presented. A scalable 5-channel system is demonstrated each with a 3-dB Bandwidth of 5-GHz. Moreover, this architecture can be continuously tuned and re-configured within a wide frequency range to cover all 5-channels. To the best of the authors’ knowledge, this is the first wideband modular and re-configurable mm-wave RAU that covers the entire mm-wave sub-45-GHz band implemented in silicon photonics.

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Section: Rau System Architecturementioning

confidence: 99%

Section: Photonic Measurements and Calibrationmentioning

confidence: 99%