Title :
A Compact Filtering Antenna With Flat Gain Response Within the Passband
Author :
Xinwei Chen ; Fengxian Zhao ; Liyun Yan ; Wenmei Zhang
Author_Institution :
Coll. of Phys. & Electron., Shanxi Univ., Taiyuan, China
Abstract :
A compact filtering antenna is designed for the modern wireless communication systems in this letter. First, a two-pole Butterworth bandpass filter is designed. Then, by substituting the second port and resonator with fan-shaped patch antenna (traditional antenna) with defected ground structure (DGS), a filtering antenna is formed. Compared to the traditional antenna, the filtering antenna obtains the flatter gain response within the passband, good selectivity at the passband edge, and the wider bandwidth. Measured results show that the filtering antenna can operate at 2.4 GHz and has a 460-MHz bandwidth and a 2.3-dBi peak gain within the passband. Moreover, a radiation zero occurs at 3 GHz.
Keywords :
Butterworth filters; UHF antennas; band-pass filters; defected ground structures; filtering theory; microstrip antennas; DGS; bandwidth 460 MHz; compact filtering antenna; defected ground structure; fan-shaped patch antenna; flat gain response; frequency 2.4 GHz; gain 2.3 dB; modern wireless communication systems; two-pole Butterworth bandpass filter; Cross polarization; defected ground structure (DGS); fan-shaped patch antenna; filtering antenna; flat gain;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2013.2271972
