A Codesigned Compact Dual-Band Filtering Antenna with PIN Loaded for WLAN Applications

Abstract EN

A codesigned compact dual-band filtering antenna incorporating a PIN diode for 2.45/5.2 GHz wireless local area network (WLAN) applications is proposed in this paper.

The integrated filtering antenna system consists of a simple monopole radiator, a microstrip dual-band band-pass filter, and a PIN diode.

The performance of the filtering antenna is notably promoted by optimizing the impedance between the antenna and the band-pass filter, with good selectivity and out-of-band rejection.

The design process follows the approach of the synthesis of band-pass filter.

In addition, the PIN diode is incorporated in the filtering antenna for further size reduction, which also widens the coverage of the bandwidth by about 230% for 2.4 GHz WLAN.

With the presence of small size and good filtering performances, the proposed filtering antenna is a good candidate for the wireless communication systems.

Prototypes of the proposed filtering antenna incorporating a PIN diode are fabricated and measured.

The measured results including return losses and radiation patterns are presented.