Mitigation of Reflector Dish Wet Antenna Effect at 72 and 84 GHz

Hong, Eugene; Lane, Steven A.; Murrell, David; Tarasenko, Nicholas; Christodoulou, C.G.

doi:10.1109/lawp.2017.2762519

Cited by 14 publications

(14 citation statements)

References 17 publications

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“…According to the Leijnse model, WAA typical of E-band CML frequencies is about two times higher than for 38 GHz. Hong et al (2017), however, showed on 72 and 84 GHz microwave links that WAA depends highly on specific hardware settings. An antenna without radome experienced WAA of about 7 dB during a spraying experiment with 95 artificial rain.…”

Section: Wet Antenna Attenuationmentioning

confidence: 99%

Atmospheric observations with E-band microwave links – challenges and opportunities

Fencl¹,

Dohnal²,

Valtr³

et al. 2020

Preprint

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Opportunistic sensing of rainfall and water vapor using commercial microwave links operated within cellular networks was conceived more than a decade ago. It has since been further investigated in numerous studies predominantly 10 concentrating on the frequency region of 15-40 GHz. This manuscript provides the first evaluation of rainfall and water vapor sensing with microwave links operating at an E-band (specifically, 71-76 GHz and 81-86 GHz), which are increasingly updating, and frequently replacing, older communication infrastructure. Attenuation-rainfall relations are investigated theoretically on drop size distribution data. Furthermore, quantitative rainfall estimates from six microwave links, operated within cellular backhaul, are compared with observed rainfall intensities. Finally, the capability to detect water vapor is 15 demonstrated on the longest microwave link measuring 4.86 km in path length. The results show that E-band microwave links are by one order of magnitude more sensitive to rainfall than devices operating in the 15-40 GHz range and are thus able to observe even light rainfalls, a feat practically impossible to achieve previously. The E-band links are, however, substantially more affected by errors related to variable drop size distribution. Water vapor retrieval might be possible from long E-band microwave links, nevertheless, the efficient separation of gaseous attenuation from other signal losses will be challenging in 20 practice.

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Section: Wet Antenna Attenuationmentioning

confidence: 99%

Atmospheric observations with E-band microwave links – challenges and opportunities

Fencl¹,

Dohnal²,

Valtr³

et al. 2020

Preprint

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show abstract

“…This is an interesting point. We are aware of E-band investigation being reported in the electrical engineering journals (often IEEE) and refer to two examples of this work in the Introduction at L51 (Hansryd et al, 2010;Luini et al, 2018) and two other examples in the section about wet antenna attenuation at L94-101 (Hong et al, 2017;Ostrometzky et al, 2018). The investigations of Hansryd et al (2010) and Luini et al (2018) have similar scope as the papers suggested by Dr. Guyot.…”

mentioning

confidence: 73%

Response to Dr. Guyot

Fencl¹

2020

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“…As shown in several studies, the wet antenna effect is an important factor that should be considered [13], [19], [24]. To investigate the wet antenna effect, measurements were conducted before and after covering the Tx and Rx antennas and their radomes with additional protective covers and a custom designed material that has lower retention of water than the standard radome.…”

Section: Rain Statistics and Rain Attenuation Measurement Setupmentioning

confidence: 99%

“…The associate editor coordinating the review of this manuscript and approving it for publication was Henry Bertoni. (18)(19)(20)(21)(22)(23)(24)(25)(26)(27). In [3], rain attenuation over a four year period was measured at Ka-band (19.7 and 20.2 GHz) based on the ONERA satellite link.…”

Section: Introductionmentioning

confidence: 99%

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Rain Statistics Investigation and Rain Attenuation Modeling for Millimeter Wave Short-Range Fixed Links

et al. 2019

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Millimeter wave (mmWave) communication is a key technology for fifth generation (5G) and beyond communication networks. However, the communication quality of the radio link can be largely affected by rain attenuation, which should be carefully taken into consideration when calculating the link budget. In this paper, we present results of weather data collected with a PWS100 disdrometer and mmWave channel measurements at 25.84 GHz (K band) and 77.52 GHz (E band) using a custom-designed channel sounder. The rain statistics, including rain intensity, rain events, and rain drop size distribution (DSD) are investigated for one year. The rain attenuation is predicted using the DSD model with Mie scattering and from the model in ITU-R P.838-3. The distance factor in ITU-R P.530-17 is found to be inappropriate for a short-range link. The wet antenna effect is investigated and additional protection of the antenna radomes is demonstrated to reduce the wet antenna effect on the measured attenuation.

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Mitigation of Reflector Dish Wet Antenna Effect at 72 and 84 GHz

Cited by 14 publications

References 17 publications

Atmospheric observations with E-band microwave links – challenges and opportunities

Atmospheric observations with E-band microwave links – challenges and opportunities

Response to Dr. Guyot

Rain Statistics Investigation and Rain Attenuation Modeling for Millimeter Wave Short-Range Fixed Links

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