Calculation of depolarization cancellation on Ka-band satellite-to-ground path

Maekawa, Yasunori; Chang, N.S.; Miyazaki, Akira; Segawa, T.

doi:10.1109/aps.1991.175151

Cited by 5 publications

(6 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The analysis shows that cross-channel interference on CP signals can be significantly reduced by this simple mitigation circuit and this approach has been reported earlier [5], [7], [8]. The analysis has revealed that the net performance of this RF mitigation technique, in general, is not equal in magnitude between an incident right CP wave and a left CP wave.…”

Section: Introductionmentioning

confidence: 72%

“…1(b). This technique has been reported [5], [7], [8]. The wave emerges elliptically polarized with the horizontal component that is phase delayed and attenuated more relative to those of the vertical component.…”

Section: A Ice Particlesmentioning

confidence: 93%

“…2. Significant improvement in XPD using this technique has been suggested [5], [7], [8]. The sensitivity of XPD to vh has been stressed by Allnutt [27].…”

Section: B Rainmentioning

confidence: 95%

“…If the link encounters ice particles, the effect will be more differential phase [3]- [5], [10], [12], [26] than differential amplitude between V and H components as stated above. In this situation a vertical phase delay mitigation technique should be very beneficial.…”

Section: A Ice Particlesmentioning

confidence: 99%

See 3 more Smart Citations

Mitigation of rain and ice particle cross polarization at RF for dual circularly polarized waves

Tomìyasu

1998

IEEE Trans. Antennas Propagat.

View full text Add to dashboard Cite

On millimeter-wave satellite-to-ground links encountering moderate rain and ice particles, RF mitigation of atmospheric cross-polarization effects on circularly polarized (CP) waves can be achieved by inserting a passive fixed phase delay in the vertical component of the received electric field introduced prior to an orthomode transducer (OMT) in the receiver. This passive phase shifter and the OMT can be combined into a single microwave structure and its performance is discussed.

show abstract

Section: Introductionmentioning

confidence: 72%

Section: A Ice Particlesmentioning

confidence: 93%

“…2. Significant improvement in XPD using this technique has been suggested [5], [7], [8]. The sensitivity of XPD to vh has been stressed by Allnutt [27].…”

Section: B Rainmentioning

confidence: 95%

Section: A Ice Particlesmentioning

confidence: 99%

See 2 more Smart Citations

Mitigation of rain and ice particle cross polarization at RF for dual circularly polarized waves

Tomìyasu

1998

IEEE Trans. Antennas Propagat.

View full text Add to dashboard Cite

show abstract

“…On the other hand, according to the cross-polarization discrimination measurements of the beacon signal conducted concurrently in these observational periods, average values of the cross-polar phase vary significantly from 110° to 150° in each rainfall event even for similar rainfall rates, and this variation is shown to be primarily due to the difference of DSD which is also detected directly by observations on the ground [7]. Also, compared with Kuband (12 GHz) rain attenuation measurements using BS (Broadcasting Satellite) signal, the ratio of Ka-band (20 GHz) specific attenuation [dB/km] to that of the Ku band D Ka /D Ku shows a significant variation from 2.5 to 3.8 depending on each rainfall event, and this range of ratios is well explained by the aforementioned three kinds of DSD, being in good correlation with the distribution of cross-polar phase [16,17].…”

Section: Time Percentage Of Uplink Attenuationmentioning

confidence: 92%

A study on uplink (30 GHz) rain attenuation characteristics and up- and downlink available time percentages in Ka-band satellite communication

Maekawa

2000

Electron. Comm. Jpn. Pt. I

View full text Add to dashboard Cite

SUMMARYUsing the CS-2 and CS-3 beacon levels (19.45 GHz) observed for the past 6 years, this paper discusses the time percentages of up-and downlink attenuation when the signal is transmitted from the Osaka Neyagawa to Tokyo Setagaya station via satellite. The uplink attenuation in the 30-GHz band is inferred in a more realistic manner by selecting a relevant kind of raindrop size distribution (DSD) for each rainfall event from three representative types, namely, Jd (drizzle), MP (standard), and Jt (thunderstorm), based on cross-polar phase measurement at each event. The resulting time percentages of the uplink attenuation tend to decrease by about 0.005% for attenuation larger than 20 dB (time percentages < 0.05%) due to possible effects of the Jt-type DSD, compared with those inferred by the MP-type DSD only. This tendency is also found in up-and downlink attenuation of nearly 30 dB. The time percentages of bidirectional up-and downlink attenuation between the Neyagawa and Setagaya stations show a characteristic difference of about 50%, depending on the transmission directions each year, but they have nearly the same long-term statistics over the 6 years. Also, the time percentages of up-and downlink attenuation of between 4 and 5 dB increase by about 0.1% due to the probability of simultaneous occurrence of the attenuation between the two stations, compared with those inferred with this simultaneous occurrence neglected.

show abstract

A study on uplink (30 GHz) rain attenuation characteristics and up- and downlink available time percentages in Ka-band satellite communication

Maekawa

2000

Electron. Comm. Jpn. Pt. I

View full text Add to dashboard Cite

Using the CS‐2 and CS‐3 beacon levels (19.45 GHz) observed for the past 6 years, this paper discusses the time percentages of up‐ and downlink attenuation when the signal is transmitted from the Osaka Neyagawa to Tokyo Setagaya station via satellite. The uplink attenuation in the 30‐GHz band is inferred in a more realistic manner by selecting a relevant kind of raindrop size distribution (DSD) for each rainfall event from three representative types, namely, Jd (drizzle), MP (standard), and Jt (thunderstorm), based on cross‐polar phase measurement at each event. The resulting time percentages of the uplink attenuation tend to decrease by about 0.005% for attenuation larger than 20 dB (time percentages < 0.05%) due to possible effects of the Jt‐type DSD, compared with those inferred by the MP‐type DSD only. This tendency is also found in up‐ and downlink attenuation of nearly 30 dB. The time percentages of bidirectional up‐ and downlink attenuation between the Neyagawa and Setagaya stations show a characteristic difference of about 50%, depending on the transmission directions each year, but they have nearly the same long‐term statistics over the 6 years. Also, the time percentages of up‐ and downlink attenuation of between 4 and 5 dB increase by about 0.1% due to the probability of simultaneous occurrence of the attenuation between the two stations, compared with those inferred with this simultaneous occurrence neglected. © 2000 Scripta Technica, Electron Comm Jpn Pt 1, 83(8): 13–21, 2000

show abstract

Calculation of depolarization cancellation on Ka-band satellite-to-ground path

Cited by 5 publications

References 6 publications

Mitigation of rain and ice particle cross polarization at RF for dual circularly polarized waves

Mitigation of rain and ice particle cross polarization at RF for dual circularly polarized waves

A study on uplink (30 GHz) rain attenuation characteristics and up- and downlink available time percentages in Ka-band satellite communication

A study on uplink (30 GHz) rain attenuation characteristics and up- and downlink available time percentages in Ka-band satellite communication

Contact Info

Product

Resources

About