Title :
CPW-Fed Broadband Circularly Polarized Planar Monopole Antenna With Improved Ground-Plane Structure
Author :
Li Zhang ; Yong-Chang Jiao ; Yang Ding ; Bo Chen ; Zi-Bin Weng
Author_Institution :
Nat. Lab. of Sci. & Technol. on Antennas & Microwaves, Xidian Univ., Xi´an, China
Abstract :
A novel CPW-fed planar printed monopole antenna with broadband circular polarization (CP) characteristic is presented. The proposed antenna consists of a rectangle patch and an improved ground-plane. By appropriately adding a vertical stub and cutting a horizontal slit on the ground-plane, the impedance bandwidth of the antenna is enlarged, and its wide axial-ratio (AR) bandwidth is achieved. The measured results show that the proposed antenna has not only a broad 3-dB AR bandwidth of 44.9% (2.65 GHz, 4.58-7.23 GHz) with respect to the CP center frequency 5.90 GHz, but also a wide 10-dB return loss bandwidth of 76.9% (4.35 GHz, 3.48-7.83 GHz) centered at 5.66 GHz.
Keywords :
antenna feeds; broadband antennas; coplanar waveguides; electric impedance; electromagnetic wave polarisation; microstrip antennas; monopole antennas; planar antennas; AR bandwidth; CP characteristic; CPW-fed broadband circularly polarized planar monopole antenna; CPW-fed planar printed monopole antenna; axial-ratio bandwidth; bandwidth 2.65 GHz; bandwidth 4.58 GHz to 7.23 GHz; ground-plane antenna; ground-plane structure; impedance bandwidth; loss 10 dB; rectangle patch antenna; vertical stub; Axial-ration (AR); circular polarization (CP); monopole antenna;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2013.2267719
