Title :
Multi-resonance UWB antenna with improved band notch characteristics
Author :
Chang, Kihun ; Kim, Hyungrak ; Yoon, Young Joong
Author_Institution :
Dept. of Electr. & Electron. Eng., Yonsei Univ., Seoul, South Korea
Abstract :
A UWB dipole antenna with flat and sharp band notch characteristics is proposed to obtain both WLAN band notch and a compact UWB RF-front structure. To achieve all these characteristics, the antenna acts as a multi-resonance radiator. To suppress interference from the WLAN system, the antenna is sharply mismatched at the WLAN band. To guarantee suppression in the band, the notch characteristics are flat in the WLAN band. The fabricated antenna has an operating bandwidth of 2.7 GHz to 11.0 GHz for VSWR <2. The rejected frequency range is measured as 5.10 GHz to 5.75 GHz for -3 dB return loss. The radiated power at this band is measured as 15 dB less than the power at the operating frequency band. From the measured results, it is apparent that the proposed antenna provides a compact RF-front in the UWB system without an additional circuit for the suppression of the WLAN band.
Keywords :
dipole antennas; interference suppression; multifrequency antennas; ultra wideband antennas; 2.7 to 11.0 GHz; 3 dB; UWB dipole antenna; WLAN band notch; interference suppression; multi-resonance UWB antenna; return loss; Antenna measurements; Bandwidth; Circuits; Dipole antennas; Frequency measurement; Interference suppression; Loss measurement; Power measurement; Ultra wideband antennas; Wireless LAN;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2005 IEEE
Print_ISBN :
0-7803-8883-6
DOI :
10.1109/APS.2005.1552301
