Broadband stacked shorted patch antenna for mobile communication handsets

Two designs of stacked shorted patch antennas with a low profile (antenna height less than 5 mm) and a wide bandwidth (larger than 10%) suitable for applications for GSM 1800 and GSM 900 cellular systems, respectively, are presented. In the designs, the upper and lower shorted patches have a common shorting wall, and are both printed on a dielectric substrate. Wide impedance bandwidth is obtained by adjusting the lengths of the upper and lower patches to be slightly different, leading to the excitation of two closely excited resonant modes. The experimental results are presented and discussed.

[1]  J. Dauvignac,et al.  Dual-frequency and broad-band antennas with stacked quarter wavelength elements , 1999 .

[2]  Rod Waterhouse.  Broadband stacked shorted patch , 1999 .

[3]  Kai Fong Lee,et al.  Miniature multilayer shorted patch antenna , 2000 .

[4]  J. Ollikainen,et al.  Thin dual-resonant stacked shorted patch antenna for mobile communications , 1999 .

[5]  U. K. Revankar,et al.  Broadband stacked annular ring coupled shorted circular microstrip antenna , 2000 .

[6]  C. Peixeiro,et al.  Microstrip patch antenna for GSM 1800 handsets , 1999, IEEE Antennas and Propagation Society International Symposium. 1999 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.99CH37010).