Title :
A new quasi-Yagi antenna for planar active antenna arrays
Author :
Deal, William R. ; Kaneda, Noriaki ; Sor, James ; Qian, Yongxi ; Itoh, Tatsuo
Author_Institution :
Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA
fDate :
6/1/2000 12:00:00 AM
Abstract :
In this paper, a novel broadband planar antenna based on the classic Yagi-Uda dipole antenna is presented, and its usefulness as an array antenna is explored. This “quasi-Yagi” antenna is realized on a high dielectric-constant substrate, and is completely compatible with microstrip circuitry and solid-state devices. This antenna achieves a measured 48% frequency bandwidth for voltage standing-wave ratio <2, better than a 12-dB front-to-back ratio, smaller than -15 dB cross polarization, and 3-5-dBi absolute gain. Mutual coupling of the antenna in an array environment is investigated. Finally, three simple arrays are presented, demonstrating the usefulness of the antenna as an array element. This novel antenna should find wide application in wireless communication systems, power combining, phased arrays, and active arrays, as well as millimeter-wave imaging arrays
Keywords :
Yagi antenna arrays; active antenna arrays; antenna phased arrays; dipole antenna arrays; millimetre wave antenna arrays; planar antenna arrays; Yagi-Uda dipole antenna; absolute gain; active arrays; array element; broadband planar antenna; cross polarization; frequency bandwidth; front-to-back ratio; high dielectric-constant substrate; microstrip circuitry; millimeter-wave imaging arrays; mutual coupling; phased arrays; planar active antenna arrays; power combining; quasi-Yagi antenna; voltage standing-wave ratio; wireless communication systems; Antenna arrays; Broadband antennas; Circuits; Dielectric devices; Dielectric substrates; Dipole antennas; Microstrip antenna arrays; Microstrip antennas; Phased arrays; Planar arrays;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
