High isolation proximity coupled multilayer patch antenna for dual-frequency operation

Inclan-Sanchez, Luis; Vazquez-Roy, Jose-Luis; Rajo-Iglesias, Eva

Abstract

A new method to enhance the isolation between two ports in a dual-frequency proximity coupled patch antenna is presented. The dual-polarized patch antenna has a multilayer substrate configuration to achieve a compact design. In addition, two periodic structures have been included under the two feeding lines to have stopband behavior in the other frequency port. These electromagnetic bandgap (EBG) filters have been realized by introducing mushroom type resonators underneath the antenna feeding lines. Measurements show how the isolation between the feeding ports can be improved by selecting a suitable size for the resonators. The proposed antenna design achieves an isolation higher than 55 dB in the first frequency band (2.1 GHz) and better than 40 dB in the second one (2.45 GHz). Radiation patterns are not affected by the proposed structures showing low cross-polarization levels in both planes at the two frequency bands.

Más información

Título según WOS: ID WOS:000254869000030 Not found in local WOS DB
Título de la Revista: IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
Volumen: 56
Número: 4
Editorial: IEEE COMMUNICATIONS SOCIETY
Fecha de publicación: 2008
Página de inicio: 1180
Página final: 1183
DOI:

10.1109/TAP.2008.919218

Notas: ISI