Title :
A Compact Dipole Antenna for DTV Applications by Utilizing L-Shaped Stub and Coupling Strip
Author :
Chien-Jen Wang ; Yu-Lin Lee
Author_Institution :
Dept. of Electr. Eng., Nat. Univ. of Tainan, Tainan, Taiwan
Abstract :
In this study, a small dipole antenna for digital television (DTV) reception band (470-862 MHz) is developed. The antenna is composed of a pair of bent dipoles, which are coupling fed by a coaxial cable. The resultant antenna has compact size of 20×200×0.8 mm3. Two parasitically coupling strips are added to excite one additional resonance mode. Bent dipole antennas and feeding structures are fabricated on the different planes of the substrate to embed two L-shaped stubs, thus resulting in improvement of the impedance matching condition. After careful optimization of the geometrical parameters of the antenna, the resonances are merged and thus, a wide impedance bandwidth is obtained. The measured -6-dB bandwidth of the antenna in free space is 615 MHz (80.4%).
Keywords :
UHF antennas; coaxial cables; dipole antennas; optimisation; DTV applications; L-shaped stub; careful optimization; coaxial cable; compact dipole antenna; coupling strip; digital television reception band; frequency 470 MHz to 862 MHz; geometrical parameters; impedance matching condition; Antenna measurements; Bandwidth; Broadband antennas; Couplings; Digital TV; Dipole antennas; Reflection coefficient; Coupling strip; digital television; dipole antenna;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2014.2360554
