Title :
High isolation dual-polarized patch antenna using integrated defected ground structure
Author :
Chung, Younkyu ; Jeon, Seong-Sik ; Ahn, Dal ; Choi, Jae-Ick ; Itoh, Tatsuo
Author_Institution :
Dept. of Electr. Eng., Univ. of California, Los Angeles, CA, USA
Abstract :
This letter presents a high isolation dual-frequency orthogonally polarized rectangular patch antenna utilizing microstrip feed line integrated with a defected ground structure (DGS). The demonstrated approach results in a significant improvement in port isolation in comparison to a conventional dual-polarized antenna fed by simple microstrip lines. Measurements show an improvement of 20 dB in port isolation relative to the conventional antenna, operating at 2 and 2.5 GHz. Image impedance of a microstrip line with DGS is controlled by the DGS geometry without modifying the dimension of the line. A 150 Ω high impedance line is effectively implemented using a microstrip line with 75 Ω line width by incorporating the DGS.
Keywords :
antennas; microstrip lines; DGS geometry; characteristic impedance; defected ground structure; dual polarization; dual-polarized antenna; high isolation dual-polarized patch antenna; image impedance; impedance line; isolation; microstrip feed line; patch antenna; port isolation; Antenna measurements; Artificial satellites; Feeds; Geometry; Impedance; Microstrip antennas; Optical polarization; Patch antennas; Power harmonic filters; Resonant frequency;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2003.821501
