id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
asir-36155	Levin, Boris	Underground Radio Communications and Radio Observation	2024	11	.pdf	application/pdf	4499	223	51	It should be noted that the first works on optimizing antenna characteristics were devoted to director-type antennas. An approximate method that allows one to obtain such a result for use in the synthesis of director antennas is proposed in Section 2.	cache/asir-36155.pdf	txt/asir-36155.txt