Design and Construction of Axial Mode Mono-Filar Helical Antenna for Hydrogen Line Emission Studies with 4NEC2 Tool

作     者：Emmanuel Okpanachi Musa Ikechukwu Anthony Obi Eugene Anibe Idogbe Jacob Okpe Ali Cyril Osamhonyi Ogbeiwi Prosper Chukwuebuka Chukwuka Ndubuisi Francis Eze Emmanuel Okpanachi Musa;Ikechukwu Anthony Obi;Eugene Anibe Idogbe;Jacob Okpe Ali;Cyril Osamhonyi Ogbeiwi;Prosper Chukwuebuka Chukwuka;Ndubuisi Francis Eze

作者机构：NASRDA-Centre for Basic Space Science Nsukka Nigeria University of Nigeria Nsukka Nigeria 

出 版 物：《Open Journal of Antennas and Propagation》 (天线与传播（英文）)

年 卷 期：2022年第10卷第3期

页      面：29-44页

学科分类：0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 

主　　题：Helical Antenna Hydrogen Line 4NEC2 Perspex Glass Offset Parabolic Dish 

摘      要：Antennas have come to play a significant role in the reception and transmission of electromagnetic radiation or signals which in turn have improved scientific research in the various areas where they have been used. Astronomy is not left out;as a study of everything beyond earth’s atmosphere, useful signals have to travel great distances to reach us. Hence the need for equipment to detect such signals. The Helical Antenna is known to possess high gain (directivity) and can process signals with any type of orientation/polarization which implies high sensitivity hence the desire to use it. Simulation was done using the legacy 4NEC2 software. The purpose of this paper is to design a circularly polarized helical antenna operating in axial mode that is suitable for detection of neutral hydrogen line emission at the frequency of 1420 MHz and to show how it can be used as a feed for an off-set parabolic dish.