Amateur radio Antennas Coaxial cable Dipole antenna Bailey's 1939 patent (PDF) what is Coaxial antenna - a definition from Whatis.com Coaxial Antenna System patent number 7151497
아마추어 무선 안테나 동축 케이블 쌍극 안테나 Bailey's 1939 patent (PDF) what is Coaxial antenna - a definition from Whatis.com Coaxial Antenna System patent number 7151497