Patch Loaded Slot Antenna for Super Wideband Applications with Dual-Band Notch Characteristic

Abstract

This paper presents a patch loaded slot antenna for super wideband (SWB) application. To obtain SWB characteristic, the proposed antenna geometry combined a rectangular slot and an overlying patch excited by a trident shaped microstrip feed. It is observed that the hybrid nature of the proposed antenna effectively enhances the impedance bandwidth up to 120%, by combining the resonance of both patch and slot. Besides, it is investigated that after converting the conventional tapered feed into the trident shape feed, the impedance bandwidth is increased further from 120% to 167% ranging between 1.25 to 15 GHz. Moreover, one U-shaped slot and two L-shaped stubs are inserted into the antenna design to introduce the dual-band rejection property from 1.8 to 2.4 GHz (GSM 1800, Wi-Fi 2.1 and 2.4) and 3.1 to 4.2 GHz (WiMAX and C-band). Further, to validate the simulation results a prototype is fabricated and tested. The measured result shows that the proposed antenna offered an impedance bandwidth of 170.3% from 1.2 GHz to 15 GHz.

Directivity‐enhanced planar slot antenna backed by substrate integrated waveguide cavity

“…1,2 However, the shortage of PSA is bidirectional radiation, because the slot etched on the metal surface can radiate to both sides. 3 Generally, waveguide slot antenna (WSA) with back cavity can overcome this problem, 4 but it has a large volume. Substrate integrated waveguide (SIW) 5 which has the planar structure and the characteristics of rectangular waveguides has attracted much attention since it was proposed.…”

“…Planar slot antenna (PSA) is small and easy to integrate, which is very suitable for it 1,2 . However, the shortage of PSA is bidirectional radiation, because the slot etched on the metal surface can radiate to both sides 3 . Generally, waveguide slot antenna (WSA) with back cavity can overcome this problem, 4 but it has a large volume.…”