High Gain Bow-Tie Slot Antenna Array Loaded With Grooves Based on Printed Ridge Gap Waveguide Technology

Abstract

The development of wireless and satellite communication has led to a demand for highperformance microwaves and mm-wave components in terms of cost, losses, and fabrication complexity. Gap waveguide is one of the emerging technologies in 5G and mm-wave applications due to their low cost, low losses, and high power handling capability. In this paper, a groove-based wideband bow-tie slot antenna array is designed at 30 GHz based on printed ridge gap waveguide technology (PRGW). A two-section T-shaped ridge is designed to feed a bow tie slot placed on the upper ground of the PRGW. The gain of the proposed slot antenna is enhanced by using a horn-like groove. Then, the proposed high gain element is deployed to build up a 1 bow-tie slot antenna array loaded with three-layer groove antenna. The proposed antenna array is fabricated and measured, where the measured results show a −10-dB impedance bandwidth from 29.5 to 37 GHz (22%). The fabricated prototype achieves a high gain of 15.5 dBi and a radiation efficiency higher than 80% over the operating frequency bandwidth. INDEX TERMS Millimeter wave technology, periodic structure, wideband, high gain, antenna arrays.

A Bandwidth-Enhanced Cavity-Backed Slot Array Antenna for mmWave Fixed-Beam Applications

“…However, these techniques, a prohibitively large simulations are required to determine the number, the dimensions, and locations of pins for the capacitive and inductive tuning resulting in bandwidth enhancement [8], [13]. Alternatively, it has been proposed in [11], [16] to substitute the fully metallic waveguide-based antenna with the substrateintegrated waveguide (SIW) antenna offering a variety of radiating elements to choose from. Wideband radiating elements such as magneto-electric dipole (MED) and bow-tie slot (BTS) have been proposed which led to significant bandwidth enhancement [11], [16].…”

“…Alternatively, it has been proposed in [11], [16] to substitute the fully metallic waveguide-based antenna with the substrateintegrated waveguide (SIW) antenna offering a variety of radiating elements to choose from. Wideband radiating elements such as magneto-electric dipole (MED) and bow-tie slot (BTS) have been proposed which led to significant bandwidth enhancement [11], [16]. Similarly to the conventional SIW antenna, the losses of these antennas are more significant.…”

Wideband Printed Ridge Gap Rat-Race Coupler for Differential Feeding Antenna

“…The second is the printed RGW (PRGW) [8] where the printed circuit board (PCB) technology is used. RGW and PRGW technologies have been used in the design and implementation of several components such as couplers and antennas at different frequencies including 15 GHz [9], [10], 30 GHz [11]- [15], and 60 GHz [16]. In this paper, PRGW is used to implement a wideband, low cost, and light-weight rat-race coupler compared to the metallic one.…”

Ultra‐wideband linearly polarised planar bowtie array antenna with feeding network using dielectric‐based inverted microstrip gap waveguide

“…As one of the key components in these systems, planar array antennas are highly demanded with ultrawideband (UWB) and high-gain performance. Researchers applied different methods to broaden the bandwidth of the array antennas [2][3][4][5][6][7][8]. Obviously, in all previous work, the challenge is how to obtain wideband antenna elements and design the feeding network based on various transmission line technologies.…”