A mm-Wave Patch Antenna with Broad Bandwidth and a Wide Angular Range

Abstract

A novel mm-wave microstrip-fed patch antenna with broad bandwidth and wide angular coverage suitable for integration in planar arrays is designed, analyzed and verified by measurements. The antenna provides a bandwidth of 13.1% between 34.1 GHz and 38.9 GHz, which is achieved by a slotted multiple resonances microstrip patch and a matching circuit in microstrip technology. The antenna is built on RO3003 substrate with top and ground layers, which is low cost compared to other techniques. For simple integration with microstrip and frontend circuits, the feeding happens in the top layer with a microstrip coupling gap feed. The wide half power beamwidth is achieved by suitably designed parasitic patches for the first resonant mode. The second resonant mode has a wide half power beamwidth by default. The half power beamwidth is between 100°and 125°within the matched bandwidth, which is a very good value for a microstrip patch antenna radiating over a ground plane. The measured input impedance and radiation characteristic show very good agreement with simulation results.

Design and analysis of a quad‐band substrate‐integrated‐waveguide cavity backed slot antenna for 5G applications

“…Single band and dual band mm‐wave antennas for 5G applications were studied in References 1 and 10‐19 . In some of them via‐free microstrip‐fed patch antennas were used, while in others SIW antennas were analyzed.…”

Dual-Polarized mm-Wave Antenna Solution for Mobile Phone

“…As mobile devices can be in any orientation with respect to the access point or base station during normal use, dual-polarized operation and beamsteering capabilities are required in order to provide sufficient link reliability. Most of the millimeter-wave antennas support radiation towards the broadside direction of the mobile device [4]- [6]. On the other hand, providing dual-polarized radiation towards the edge of the phone is very demanding since the thickness of PCBs is small compared to the wavelength.…”

Ultrawide bandwidth enhancement by using sleeve‐probe feeding in rectangular microstrip antennas

“…A thick substrate with a small dielectric constant, such as an air‐substrate, can improve the bandwidth to around 10% . It could be further expanded to 30%‐50% by applying capacitive coupling, slot coupling in the ground plane, stacking multiple patches, or introducing extra resonances by cutting slots in the patch or the ground plane . Among those, an L‐shaped probe embedded in a thick air substrate can expand the antenna's fractional impedance bandwidth significantly to 42% .…”

“…1 It could be further expanded to 30%-50% by applying capacitive coupling, 2,3 slot coupling in the ground plane, 4 stacking multiple patches, 5 or introducing extra resonances by cutting slots in the patch or the ground plane. 6,7 Among those, an L-shaped probe embedded in a thick air substrate can expand the antenna's fractional impedance bandwidth significantly to 42%. 3 Wider bandwidths up to 100% have been achieved with other feeding methods including but not limited to magneto-electric feeding, 8 or tapered parallel strip.…”