Measuring the Isolation of the Circularly Polarized Characteristic Waves in NVIS Propagation [Measurements Corner]

Ben A. Witvliet; Erik Van Maanen; George J. Petersen; Albert J. Westenberg; Mark J. Bentum; Cornelis H.  Slump; Roel Schiphorst

doi:10.1109/MAP.2015.2445633

Measuring the Isolation of the Circularly Polarized Characteristic Waves in NVIS Propagation [Measurements Corner]

Ben A. Witvliet, Erik Van Maanen, George J. Petersen, Albert J. Westenberg, Mark J. Bentum, Cornelis H. Slump, Roel Schiphorst

Department of Electronic & Electrical Engineering

Research output: Contribution to journal › Article › peer-review

19 Citations (SciVal)

Abstract

Separate excitation of the characteristic waves in the ionosphere results in two orthogonal propagation channels on the same frequency, which may be used in diversity and multiple-input, multiple-output (MIMO) systems. In this article, a method to measure the isolation between these paths is proposed and demonstrated in a near vertical incidence skywave (NVIS) experiment at a frequency of 7 MHz over a 105-km distance. Characteristic wave isolation exceeding 25 dB is measured during "Happy Hour": the interval when the propagation path just opens or closes and only the extraordinary wave propagates.

Original language	English
Pages (from-to)	120-145
Number of pages	12
Journal	IEEE Antennas and Propagation Magazine
Volume	57
Issue number	3
DOIs	https://doi.org/10.1109/MAP.2015.2445633
Publication status	Published - 1 Jun 2015

Keywords

Dipole antennas
Ionosphere
Antenna measurements
Frequency measurement
Radio transmitters
Polarization

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10.1109/MAP.2015.2445633

Cite this

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title = "Measuring the Isolation of the Circularly Polarized Characteristic Waves in NVIS Propagation [Measurements Corner]",

abstract = "Separate excitation of the characteristic waves in the ionosphere results in two orthogonal propagation channels on the same frequency, which may be used in diversity and multiple-input, multiple-output (MIMO) systems. In this article, a method to measure the isolation between these paths is proposed and demonstrated in a near vertical incidence skywave (NVIS) experiment at a frequency of 7 MHz over a 105-km distance. Characteristic wave isolation exceeding 25 dB is measured during {"}Happy Hour{"}: the interval when the propagation path just opens or closes and only the extraordinary wave propagates.",

keywords = "Dipole antennas, Ionosphere, Antenna measurements, Frequency measurement, Radio transmitters, Polarization",

author = "Witvliet, {Ben A.} and {Van Maanen}, Erik and Petersen, {George J.} and Westenberg, {Albert J.} and Bentum, {Mark J.} and Slump, {Cornelis H.} and Roel Schiphorst",

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language = "English",

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journal = "IEEE Antennas and Propagation Magazine",

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T1 - Measuring the Isolation of the Circularly Polarized Characteristic Waves in NVIS Propagation [Measurements Corner]

AU - Witvliet, Ben A.

AU - Van Maanen, Erik

AU - Petersen, George J.

AU - Westenberg, Albert J.

AU - Bentum, Mark J.

AU - Slump, Cornelis H.

AU - Schiphorst, Roel

PY - 2015/6/1

Y1 - 2015/6/1

N2 - Separate excitation of the characteristic waves in the ionosphere results in two orthogonal propagation channels on the same frequency, which may be used in diversity and multiple-input, multiple-output (MIMO) systems. In this article, a method to measure the isolation between these paths is proposed and demonstrated in a near vertical incidence skywave (NVIS) experiment at a frequency of 7 MHz over a 105-km distance. Characteristic wave isolation exceeding 25 dB is measured during "Happy Hour": the interval when the propagation path just opens or closes and only the extraordinary wave propagates.

AB - Separate excitation of the characteristic waves in the ionosphere results in two orthogonal propagation channels on the same frequency, which may be used in diversity and multiple-input, multiple-output (MIMO) systems. In this article, a method to measure the isolation between these paths is proposed and demonstrated in a near vertical incidence skywave (NVIS) experiment at a frequency of 7 MHz over a 105-km distance. Characteristic wave isolation exceeding 25 dB is measured during "Happy Hour": the interval when the propagation path just opens or closes and only the extraordinary wave propagates.

KW - Dipole antennas

KW - Ionosphere

KW - Antenna measurements

KW - Frequency measurement

KW - Radio transmitters

KW - Polarization

U2 - 10.1109/MAP.2015.2445633

DO - 10.1109/MAP.2015.2445633

M3 - Article

SN - 1045-9243

VL - 57

SP - 120

EP - 145

JO - IEEE Antennas and Propagation Magazine

JF - IEEE Antennas and Propagation Magazine

IS - 3

ER -

Measuring the Isolation of the Circularly Polarized Characteristic Waves in NVIS Propagation [Measurements Corner]

Abstract

Keywords

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