Ultra-Short-Wave Propagation over Land

Burrows, Chas. R.; Decino, A.; Hunt, Loyd E.

doi:10.1109/jrproc.1935.227941

Cited by 20 publications

(3 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This relationship holds for propagation over land [3] on both polarizations. Equation (1) also results from the rigorous solution for propagation over plane earth of arbitrary ground constants on either polarization.…”

Section: Ultra-short-wave Propagation In the Junglementioning

confidence: 71%

Ultra-short-wave propagation in the jungle

Burrows¹

1966

IEEE Trans. Antennas Propagat.

View full text Add to dashboard Cite

Fj is a function of frequency, varying from near unity (less than f5 dB) at frequencies below 10 MHz to about 0.1 (-20 dB) and 0.01 (-40 dB) at 100 MHz and 400 MHz, respectively. Since Fj is independent of distance there is no exponential attenuation of ultrashort-waves in the jungle. In fact the effect of the jungle on the direct wave must be almost identical to that on the reflected wave in order not to disturb the almost complete cancellation.

show abstract

Section: Ultra-short-wave Propagation In the Junglementioning

confidence: 71%

Ultra-short-wave propagation in the jungle

Burrows¹

1966

IEEE Trans. Antennas Propagat.

View full text Add to dashboard Cite

show abstract

“…In [16], the VHF path loss measurements were performed over a non-wooded level terrain path. Again, urban scenarios are not addressed at all.…”

Section: E) Scenario 5: Outdoor-to-indoor Propagationmentioning

confidence: 99%

VHF General Urban Path Loss Model for Short Range Ground-to-Ground Communications

Andrusenko

Miller

Abrahamson

et al. 2008

IEEE Trans. Antennas Propagat.

View full text Add to dashboard Cite

From a radio frequency propagation perspective, the general focus of the commercial wireless communications community has been primarily on frequencies above 800 MHz. Therefore, there is a limited number of available empirical data and validated prediction methods indicating what type of path loss or signal degradation one should expect in various urban settings at a very high frequency (VHF) range, which is the range of operation for numerous military tactical communications systems. Furthermore, the extensive literature survey revealed that indoor propagation models are particularly lacking in either availability and/or proven fidelity. This paper presents a new general urban path loss model derived from a log-distance path loss model, floor attenuation factor model and path loss measurements taken on campus of The Johns Hopkins University Applied Physics Laboratory (JHU/ APL), Laurel, MD, with a measurement hardware suite in 30-88 MHz frequency range. The authors felt that there is a void in the open literature on simple, empirically-verified large-scale path loss models that implicitly address the lower VHF range, more than one urban setting, short communications ranges ( 1 km) and low transmitting and receiving antenna heights as well as offer reasonably high fidelity without requiring a lot of information about the site.Index Terms-Ground-to-ground communications, indoor propagation, land mobile, land mobile to land mobile communications, low antenna height, military tactical communications, military operations on urban terrain (MOUT), path loss, peer to peer communications, radio frequency (RF) propagation prediction, short range communications, single channel ground and airborne radio system (SINCGARS), squad radio, urban canyon, very high frequency (VHF) , wireless communications.

show abstract

“…Mit dem Vorstoß zu Frequenzen über 100 MHz ( < 3 m) etwa Mitte der 30er Jahre gewannen auch die Eigenschaften des unteren Teils der Atmosphäre, der bis zu einer Höhe von 10 km über der Erde reichenden Troposphäre Bedeutung für die Wellenausbreitung [34,35]. Diese wird bestimmt durch den räumlichen und zeitlichen Verlauf der Dielektrizitätszahl, die ihrerseits eine Funktion des Luftdrucks, der Temperatur und des Wasserdampfdrucks ist.…”

unclassified

100 Jahre elektromagnetische Wellen

Severin¹

1988

Frequenz

View full text Add to dashboard Cite

Ultra-Short-Wave Propagation over Land

Cited by 20 publications

References 5 publications

Ultra-short-wave propagation in the jungle

Ultra-short-wave propagation in the jungle

VHF General Urban Path Loss Model for Short Range Ground-to-Ground Communications

100 Jahre elektromagnetische Wellen

Contact Info

Product

Resources

About