Gain Augmentation of a HMSIW based Equilateral Triangular Antenna using CRSF FSS Superstrate

Abstract

In this paper, a half-mode substrate integrated waveguide (HMSIW) based equilateral triangular antenna is initially designed to operate at 6.5 GHz wireless frequency. This parent antenna is fitted with metallic vias all along two of its sides to make them perfect electrical conductor (PEC) walls while radiation taking place from the other side acts as perfect magnetic conductor (PMC) wall being devoid of such metallic vias. The antenna exhibits a gain of 5.5 dBi at the fundamental TE 101 mode with linear polarization. Its gain is augmented using polarization independent coupled-resonator spatial filter (CRSF) frequency selective surface (FSS) as superstrate and is found to increase to 8.7 dBi at the same 6.5 GHz resonating frequency. The antenna prototype along with the FSS structure are both fabricated using Arlon AD270 substrate and experimental measurements are carried out. It is observed that both simulated and measured results are in close agreement with each other.

A Typical Slotted SIW Cavity-backed Antenna for Dual frequency operations in U-NII Bands

“…It consists of posts with periodic gaps placed along the sidewalls of the structure and hence, provide low leakage loss [5].Cavity backed antennas are evident choices among the designers for low profile antennas as they provide high gain, high power handling capabilities and unidirectional radiation pattern due to suppression of surface waves as compared to the conventional slot antenna [6] - [9].Different SIW structures [10] and single band antennas [11]- [13] are reported in literature. Bandwidth and gain of antenna can be improved using Dielectric resonators [14] or, by using frequency selective surface as superstrate as discussed in [15,16]. Antennas with dual bands of operation are attracting researchers worldwide owing to increase in demand for wireless systems such as global positioning system (GPS), wireless local area network (WLAN) and satellite communication.…”

Design and Optimization of a Novel Compact Broadband Linearly/Circularly Polarized Wide-Slot Antenna for WLAN and WiMAX Applications

“…Recent trends in wireless communication systems create the needs for compact size components, stable communication links, as well as high-speed data transmission [1][2][3][4]. As planar broadband circularly polarized (CP) antennas with compact footprints and low profiles are capable of fulfilling these requirements, therefore development of high-performance CP structures has become a hot research topic.…”