Title :
Broadband probe-fed patch antenna with a W-shaped ground plane
Author :
Wong, Kin-Lu ; Tang, Chia-Luan ; Chiou, Jyh-Ying
Author_Institution :
Dept. of Electr. Eng., Nat. Sun Yat-Sen Univ., Kaohsiung, Taiwan
fDate :
6/1/2002 12:00:00 AM
Abstract :
A new design of a broadband probe-fed patch antenna with a W-shaped ground plane is presented. The W-shaped ground plane is obtained by bending the conventional planar ground plane into an inverted V-shape, seen in the resonant direction of the patch antenna and then adding proper flanges at the two straight edges of the bent ground plane. The proposed design is applicable to the patch antenna with a planar radiating patch with a thin air substrate. With the use of the proposed W-shaped ground plane, the required probe-pin length in the substrate remains small, although the effective substrate thickness is significantly increased, resulting in a much wider operating bandwidth. Also, by choosing proper dimensions of the W-shaped ground plane, the antenna gain for frequencies over the obtained wide bandwidth is enhanced, compared to the conventional patch antenna with a planar ground plane. In addition, the cross polarization is also reduced for the proposed design and the cross-polarization level (XPL) in the H-plane pattern can even be better than that of a conventional probe-fed patch antenna with a thin air substrate
Keywords :
antenna feeds; antenna radiation patterns; electromagnetic wave polarisation; microstrip antennas; W-shaped ground plane; antenna gain; broadband antenna; cross-polarization level; patch antenna; planar radiating patch; probe-fed antenna; probe-pin length; radiation patterns; thin air substrate; Bandwidth; Feeds; Flanges; Frequency; Impedance matching; Microstrip antennas; Patch antennas; Polarization; Probes; Resonance;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2002.1017663