Lists
Lists
Sarani, Vahid, Ali, Esraa Mousa, Shariatifar, Milad, Virdee, Bal Singh, Mariyanayagam, Dion, Rashid, Nasr, Alibakhshikenari, Mohammad and Dalarsson, Mariana (2025) Wideband circularly-polarized hexagonal SIW cavity-backed slot antenna with enhanced bandwidth and compact design. IEEE Access, 13. pp. 80407-80415. ISSN 2169-3536
This paper presents a novel wideband circularly polarized (CP) cavity-backed slot antenna based on Substrate Integrated Waveguide (SIW) technology, designed for compact and high-efficiency performance. The proposed antenna utilizes a hexagonal SIW cavity to simultaneously excite two closely spaced resonant modes (TM110 and TM210), resulting in enhanced bandwidth for linear polarization (LP). To achieve circular polarization, a passive, single-layer linear-to-circular polarization converter is integrated above the cavity, offering a structurally simple and PCB-compatible solution. Unlike conventional CP designs that rely on complex feeding networks or multilayered structures, this configuration maintains a planar profile and efficient performance. A fabricated prototype demonstrates strong agreement between simulation and measurement, achieving a peak gain of 9.2 dBic and a 14% axial ratio (AR) bandwidth. These results highlight the antenna’s suitability for modern wireless systems requiring wideband CP functionality, including satellite communications, 5G modules, and compact embedded devices.
Available under License Creative Commons Attribution 4.0.
Download (1MB) | Preview
 |
View Item |