2021
DOI: 10.1109/lawp.2021.3114626
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Design and Validation of the Phase-Compensated Long-Range Sub-THz VNA-Based Channel Sounder

Abstract: This paper presents the first vector network analyzer (VNA)-based sub-Terahertz (sub-THz) phase-compensated channel sounder at 220-330 GHz using radio-over-fiber (RoF) techniques that could enable long-range phase-coherent measurements. The optical cable solution enables long-range channel measurements at sub-THz bands, since it can effectively minimize the cable loss. This paper also proposes a novel phase compensation scheme to stabilize the phase variations introduced by optical fiber of the channel sound… Show more

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Cited by 23 publications
(22 citation statements)
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“…However, due to the unstable phase performance of the fiber, the phase information of these channel frequency responses is inaccurate, which means that the high-resolution algorithms cannot be applied to the measurement data when the VAA concept is adopted. Phase-compensation scheme has been validated at 1-50 GHz in [19], [37], and at 300 GHz in [20], and the measurement results in those papers demonstrate the practicality and effectiveness of the phase compensation principle and structure. However, the phase compensation scheme is only validated in single-input-single-output channel sounders.…”
Section: Sounder Capability Discussionmentioning
confidence: 88%
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“…However, due to the unstable phase performance of the fiber, the phase information of these channel frequency responses is inaccurate, which means that the high-resolution algorithms cannot be applied to the measurement data when the VAA concept is adopted. Phase-compensation scheme has been validated at 1-50 GHz in [19], [37], and at 300 GHz in [20], and the measurement results in those papers demonstrate the practicality and effectiveness of the phase compensation principle and structure. However, the phase compensation scheme is only validated in single-input-single-output channel sounders.…”
Section: Sounder Capability Discussionmentioning
confidence: 88%
“…Comparison of the proposed sounder and the state-of-theart channel sounders is discussed as follows. The channel sounders in [15], [19], [20], [42], [43] are VNA-based channel sounders. A multi-link channel sounder is presented in [15] at 28 GHz with 4 GHz bandwidth.…”
Section: Sounder Capability Discussionmentioning
confidence: 99%
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“…Phase compensation schemes can be applied to stabilize the phase of the VNA-based channel sounder at sub-6 GHz, mmWave and sub-Terahertz (sub-THz) bands [3], [10]- [12]. The phase compensation scheme in [10] is directly implemented using microwave circulators and radio frequency (RF) cables at sub-6 GHz bands, and using circulators and E/O and O/E conversion units for channel sounder at 1-30 GHz [3] and 1-50 GHz [11], respectively.…”
Section: Introductionmentioning
confidence: 99%