இன்டர்நேஷனல் ஜர்னல் ஆஃப் சென்சார் நெட்வொர்க்ஸ் மற்றும் டேட்டா கம்யூனிகேஷன்ஸ்

Design of a Selective Filter-Antenna with Low Insertion Loss and High Suppression Stopband for WiMAX Applications

Abstract

Alkhafaji MK, Sahbudin RKZ, Ismail AB and Hashim SJ

This paper presents a selective quasi–elliptic bandpass filter-antenna. The presented filter-antenna has a low insertion loss in the passband and relatively high stopband rejection. This structure consists of a quasi–elliptic bandpass filter direct coupled with patch antenna. The bandpass filter consists of four (λ/4) spiral square resonators. It has operates between (3.25–3.6) GHz so it is suitable for WiMAX applications. A CST Microwave Studio Suite software has used to simulate the filter-antenna circuit. The simulated results of the patch antenna and the results of the filter-antenna appears a good matching between the two circuits.