Title :
Bandwidth enhancement for multi-band slot antenna by PBG feed
Author :
Chen, B. ; Ooi, B.L. ; Leong, M.S. ; Hong, F.
Author_Institution :
Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore
Abstract :
The paper presents a novel feeding technique to enhance the impedance bandwidth of multi-band slot antenna. The proposed feeding structure is based on the photonic band gap concept. By replacing the conventional CPW feedline of the multi-band slot antenna with a PBG feedline, the impedance bandwidth can be effectively enhanced for all resonance frequencies. A PBG-fed multi-band slot antenna and a reference antenna have been fabricated and measured. Comparison shows the validity of our approach, as the bandwidths increase from 7% to 10% at 1.88 GHz; from 8% to 16% at 2.45 GHz and from 8.3% to 20.8% at 3.5 GHz, respectively.
Keywords :
UHF antennas; antenna feeds; broadband antennas; electric impedance; multifrequency antennas; photonic band gap; slot antennas; 1.88 GHz; 2.45 GHz; 3.5 GHz; CPW feedline; PBG feed; impedance bandwidth enhancement; multi-band antenna; multi-band slot antenna; photonic band gap; resonance frequencies; Antenna feeds; Antenna measurements; Antennas and propagation; Bandwidth; Coplanar waveguides; Impedance; Lattices; Microstrip antennas; Periodic structures; Slot antennas;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2004. IEEE
Print_ISBN :
0-7803-8302-8
DOI :
10.1109/APS.2004.1330618
