Title :
Dual-band microstrip-to-coplanar strip balun transition and loop antenna application
Author :
Meelarpkit, K. ; Chongcheawchamnan, Mitchai ; Phongcharoenpanich, Chuwong ; Krairiksh, Monai ; Lok, L.B. ; Robertson, Ian D.
Author_Institution :
Fac. of Eng. & Res. Center for Commun. & Inf. Technol., King Mongkut´s Inst. of Technol. Ladkrabang, Bangkok
fDate :
12/1/2008 12:00:00 AM
Abstract :
A microstrip-to-coplanar strip balun transition and its applicability to a single-fed dual-band tapered loop antenna are presented. The dual-band transition consists of a simple two-section transmission-line transformer and a two-section open-ended line. Closed-form design equations based on ideal transmission lines are derived and then verified with the examples of two designs. The application of the transition to a single-fed 0.9/1.8 GHz dual-band tapered loop antenna is then demonstrated. The measured performance of the antenna proves the validity of the proposed dual-band transition network.
Keywords :
UHF antennas; antenna feeds; baluns; coplanar transmission lines; loop antennas; microstrip antennas; microstrip transitions; multifrequency antennas; dual-band transition network; frequency 0.9 GHz; frequency 1.8 GHz; microstrip-to-coplanar strip balun transition; single-fed dual-band tapered loop antenna; two-section open-ended line; two-section transmission-line transformer;
Journal_Title :
Microwaves, Antennas & Propagation, IET
DOI :
10.1049/iet-map:20080018
