Wave Number and Input Impedance of a VLF Insulated Linear Antenna in an Anisotropic Ionosphere

We report a method to obtain the wave number and input impedance of a very low frequency (VLF) insulated linear antenna in an anisotropic ionosphere. Due to the anisotropy, electromagnetic fields in the ionosphere are decomposed into the ordinary wave and extraordinary wave. Wave equations for the l...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Shitian Zhang, Huaiyun Peng, Bing Wei, Xiange Han, Maoyan Wang
Formato:	article
Lenguaje:	EN
Publicado:	Hindawi Limited 2021
Materias:	Electrical engineering. Electronics. Nuclear engineering TK1-9971 Cellular telephone services industry. Wireless telephone industry HE9713-9715
Acceso en línea:	https://doaj.org/article/f207beb29d68423fbbe5414e9d48c991
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:f207beb29d68423fbbe5414e9d48c991
record_format	dspace
spelling	oai:doaj.org-article:f207beb29d68423fbbe5414e9d48c9912021-11-15T01:19:27ZWave Number and Input Impedance of a VLF Insulated Linear Antenna in an Anisotropic Ionosphere1687-587710.1155/2021/7936077https://doaj.org/article/f207beb29d68423fbbe5414e9d48c9912021-01-01T00:00:00Zhttp://dx.doi.org/10.1155/2021/7936077https://doaj.org/toc/1687-5877We report a method to obtain the wave number and input impedance of a very low frequency (VLF) insulated linear antenna in an anisotropic ionosphere. Due to the anisotropy, electromagnetic fields in the ionosphere are decomposed into the ordinary wave and extraordinary wave. Wave equations for the layered structure are applied to access the wave number of the insulated antenna in the ionosphere via the derivation of the eigenvalue equation by using boundary conditions. The expression for the wave number is given based on some approximation formulas. Then, King’s antenna theory is further employed to solve the input impedance and current distribution of the antenna in the anisotropic medium. After the validation of the method is performed, near-field characteristics for an insulated antenna with different medium parameters in the anisotropic ionosphere are discussed. Effects of the electric density and geomagnetic field of the time-and space-varying anisotropic ionosphere on the distribution of normalized current are analyzed. This finding provides a promising avenue for getting electromagnetic characteristics of space-borne antennas.Shitian ZhangHuaiyun PengBing WeiXiange HanMaoyan WangHindawi LimitedarticleElectrical engineering. Electronics. Nuclear engineeringTK1-9971Cellular telephone services industry. Wireless telephone industryHE9713-9715ENInternational Journal of Antennas and Propagation, Vol 2021 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Electrical engineering. Electronics. Nuclear engineering TK1-9971 Cellular telephone services industry. Wireless telephone industry HE9713-9715
spellingShingle	Electrical engineering. Electronics. Nuclear engineering TK1-9971 Cellular telephone services industry. Wireless telephone industry HE9713-9715 Shitian Zhang Huaiyun Peng Bing Wei Xiange Han Maoyan Wang Wave Number and Input Impedance of a VLF Insulated Linear Antenna in an Anisotropic Ionosphere
description	We report a method to obtain the wave number and input impedance of a very low frequency (VLF) insulated linear antenna in an anisotropic ionosphere. Due to the anisotropy, electromagnetic fields in the ionosphere are decomposed into the ordinary wave and extraordinary wave. Wave equations for the layered structure are applied to access the wave number of the insulated antenna in the ionosphere via the derivation of the eigenvalue equation by using boundary conditions. The expression for the wave number is given based on some approximation formulas. Then, King’s antenna theory is further employed to solve the input impedance and current distribution of the antenna in the anisotropic medium. After the validation of the method is performed, near-field characteristics for an insulated antenna with different medium parameters in the anisotropic ionosphere are discussed. Effects of the electric density and geomagnetic field of the time-and space-varying anisotropic ionosphere on the distribution of normalized current are analyzed. This finding provides a promising avenue for getting electromagnetic characteristics of space-borne antennas.
format	article
author	Shitian Zhang Huaiyun Peng Bing Wei Xiange Han Maoyan Wang
author_facet	Shitian Zhang Huaiyun Peng Bing Wei Xiange Han Maoyan Wang
author_sort	Shitian Zhang
title	Wave Number and Input Impedance of a VLF Insulated Linear Antenna in an Anisotropic Ionosphere
title_short	Wave Number and Input Impedance of a VLF Insulated Linear Antenna in an Anisotropic Ionosphere
title_full	Wave Number and Input Impedance of a VLF Insulated Linear Antenna in an Anisotropic Ionosphere
title_fullStr	Wave Number and Input Impedance of a VLF Insulated Linear Antenna in an Anisotropic Ionosphere
title_full_unstemmed	Wave Number and Input Impedance of a VLF Insulated Linear Antenna in an Anisotropic Ionosphere
title_sort	wave number and input impedance of a vlf insulated linear antenna in an anisotropic ionosphere
publisher	Hindawi Limited
publishDate	2021
url	https://doaj.org/article/f207beb29d68423fbbe5414e9d48c991
work_keys_str_mv	AT shitianzhang wavenumberandinputimpedanceofavlfinsulatedlinearantennainananisotropicionosphere AT huaiyunpeng wavenumberandinputimpedanceofavlfinsulatedlinearantennainananisotropicionosphere AT bingwei wavenumberandinputimpedanceofavlfinsulatedlinearantennainananisotropicionosphere AT xiangehan wavenumberandinputimpedanceofavlfinsulatedlinearantennainananisotropicionosphere AT maoyanwang wavenumberandinputimpedanceofavlfinsulatedlinearantennainananisotropicionosphere
_version_	1718428959429885952

Wave Number and Input Impedance of a VLF Insulated Linear Antenna in an Anisotropic Ionosphere

Ejemplares similares