Abstract :
It is noted that the advent of high-T/sub c/ superconducting materials has prompted a reexamination of the opportunities for improving antenna performance. Areas where superconductors have potential are considered, including superdirective arrays; large millimeter wavelength arrays; electrically small antennas; matching of electrically small antennas, including large transmitting antennas, and of superdirective arrays; switched line or single line phasers for electronic scanning of arrays; and traveling wave arrays where the transmission line phase velocity controls the beam angle. It is concluded that arrays above 5 GHz will benefit from low conduction, and probably also from low dielectric losses. Matching of electrically short antennas, both small (high-frequency) and large (low-frequency), and of arrays of moderate superdirectivity, will allow significant efficiency improvement.<>
Keywords :
antenna phased arrays; broadcast antennas; dipole antennas; directive antennas; high-temperature superconductors; impedance matching; microwave antenna arrays; scanning antennas; superconducting devices; 5 GHz; HF antennas; LF antennas; SHF; antenna performance; beam angle; dipole antennas; efficiency; electrically small antennas; electronic scanning; high temperature superconductors; high-T/sub c/ superconducting materials; large millimeter wavelength arrays; large transmitting antennas; low conduction; low dielectric losses; matching; phase velocity; single line phasers; superconducting antennas; superdirective arrays; switched line phasers; transmission line; traveling wave arrays; Algorithms; Antenna arrays; Bandwidth; Conducting materials; Electric resistance; Microstrip antenna arrays; Phased arrays; Superconducting materials; Superconducting transmission lines; Superconductivity;
