Wireless studies of the ionosphere

Appleton, E.V.

doi:10.1049/pws.1932.0027

Cited by 49 publications

(37 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For high frequency (HF) radio waves with frequencies f > 100 MHz the phase refractive index n can be derived from the Appleton -Hartree formula as (Appleton, 1932;Bassiri & Hajj, 1993) …”

Section: Ionospheric Refractive Indexmentioning

confidence: 99%

Ionospheric Propagation Effects on GNSS Signals and New Correction Approaches

Hoque¹,

Jakowski²

2012

Global Navigation Satellite Systems: Signal, Theory and Applications

View full text Add to dashboard Cite

“…For high frequency (HF) radio waves with frequencies f > 100 MHz the phase refractive index n can be derived from the Appleton -Hartree formula as (Appleton, 1932;Bassiri & Hajj, 1993) …”

Section: Ionospheric Refractive Indexmentioning

confidence: 99%

Ionospheric Propagation Effects on GNSS Signals and New Correction Approaches

Hoque¹,

Jakowski²

2012

Global Navigation Satellite Systems: Signal, Theory and Applications

View full text Add to dashboard Cite

“…As known, there are many kinds of velocities related to aspects of the electromagnetic wave such as phase velocity, group velocity, particle velocity, wave velocity and energy velocity based on the classic approach, but here we investigate only two kinds, the phase and group velocities concerning phase and group refractive indexes [10,20,21]. The relationship between the phase refractive index and phase velocity as well as between the group refractive index and group phase velocity for all values of dispersion can be defined as follows [1,2,10,[20][21][22][23]:…”

Section: Briefly On the Refractive Indexes And The Related Velocitiesmentioning

confidence: 99%

“…The ionosphere region is considered a dispersive medium with respect to microwave signals, which means that the propagation path of microwave signal through the ionosphere depends mainly on the frequency of the microwave signal. If the collision effects of the particles ions are ignored, the formula for the phase ionosphere refractive index, called Appleton-Hartree Equation, can be presented by as follows [1,22,23,28].…”

Section: General Expression Of Complex Refractive Index In the Ionospmentioning

confidence: 99%

“…This means that the magnetic field has no influence because a magnetic field only imposes a force on charged particles moving perpendicular to the field. Corresponding to this case, the conductivity called field-aligned conductivity (σ F A ) is calculated [22][23][24][25][26][27][28]. b) When propagation direction of the wave is roughly perpendicular to B o corresponding to θ 90 • and B L 0, the propagation direction is named quasi-transverse (QT) approximation.…”

Section: General Expression Of Complex Refractive Index In the Ionospmentioning

confidence: 99%

“…This causes the refractive index of the extraordinary wave to be different from the ordinary wave. According to this case, the conductivity so called Pedersen Conductivity (σ P ) is calculated [22][23][24][25][26][27][28][29].…”

Section: General Expression Of Complex Refractive Index In the Ionospmentioning

confidence: 99%

See 2 more Smart Citations

Numerical Estimation of the Complex Refractive Indexes by the Altitude Depending on Wave Frequency in the Ionized Region of the Earth Atmosphere for Microwaves Information and Power Transmissions

Nguyen¹,

Dao²,

Tran³

et al. 2016

PIER M

View full text Add to dashboard Cite

Abstract-The phase and group refractive indexes of microwaves in the ionosphere region of the earth atmosphere are very important for both the researching theoretical problems and practical problems in wireless information transmission (WIT) and wireless power transmission (WPT). So far, there have been many attempts devoted to discussing and determining characterizations of earth atmosphere's ionosphere region including the refractive indexes of microwaves concerning their velocities in ionized region, unfortunately due to the complicated features of the ionosphere region leading to research task facing many challenges. Up to recent, there is still a lack of systematic numerical data of complex refractive index by altitude depending on high frequencies of the electromagnetic waves in the ionosphere region. This paper outlines some theoretical analyses and discussions of some theoretical aspects of the complex refractive index in atmosphere's ionized region more in detail. Based on conductivities data and the complex relative permittivity by altitude determined previously, the numerically estimated data of complex refractive indexes by the altitude from 100 km up to 1000 km at the different frequencies are also shown and discussed.

show abstract