An Active Ribbon Dipole as an Array Element Prototype for the Lunar Very Low Frequency Radio Telescope

This work is concerned with a detailed study of an active antenna, which can serve as prototype phased array antenna element for future lunar very-low-frequency (VLF) radio telescope operating in the frequency range 1–30 MHz. The consisted ribbon symmetrical dipole and low-noise preamplifier. A 10 m long lay on flat surface soil, consisting layer regolith thick solid bedrock. parameters were determined by full-wave simulation using Altair Feko 2022 software. preamplifier was single-stage HEMT amplifier, whose Advanced Design System 2023 An analyzed model created to calculate all electrical noise parameters. Special attention paid analysis sensitivity terms Equivalent Flux Density (SEFD) Sky Noise Dominance (SND), taking into account changes ambient temperature from 100 K 400 K. It shown that dependences many parameters, particular, radiation efficiency, directivity, effective area, SND, SEFD had noticeable oscillatory components. pattern also subject cyclical occur sync directivity. These properties caused presence two-layer should be considered when developing VLF telescopes.