Title :
Analysis and design of broadside-coupled striplines-fed bow-tie antennas
Author :
Lin, Yu-De ; Tsai, Syh-Nan
Author_Institution :
Antenna Lab., Nat. Chiao Tung Univ., Hsinchu, Taiwan
fDate :
3/1/1998 12:00:00 AM
Abstract :
The design of a bow-tie antenna fed by broadside-coupled striplines (BCS) for the 2.4-GHz ISM band is described. The two fins of the bow tie are, respectively, on the two sides of the substrate. The feeding balanced lines adopted are the BCS. A quarter-wave transformer is used to transform the microstrip line input to the BCS feed. An analysis method based on the mixed-potential integral equation method is used to characterize the input characteristics of the bow-tie antenna. The numerical results obtained are in good agreement with the experimental data. Through experiments with bow-tie antennas of various extended angles, the bow-tie antenna with a 90° extended angle exhibits the widest bandwidth in the desired frequency band, which has a bandwidth of 19% for a VSWR<1.5:1
Keywords :
antenna feeds; antenna radiation patterns; electric potential; integral equations; microstrip antennas; mobile antennas; strip lines; 2.4 GHz; ISM band; UHF; VSWR; antenna analysis; antenna design; balanced lines feeder; bandwidth; broadside-coupled striplines-fed bow-tie antennas; experimental data; extended angles; frequency band; input characteristics; microstrip line input; mixed-potential integral equation method; mobile communication system; printed antenna; quarter-wave transformer; radiation patterns; substrate; Bandwidth; Circuits; Dielectric losses; Dielectric substrates; Dipole antennas; Feeds; Frequency; Integral equations; Mobile antennas; Stripline;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
