A Q-band high-gain substrate-integrated waveguide slot antenna

Abstract

agreement between simulation and measurement is achieved while the reflection coefficient of the antennas is less than 28 dB in the 55-65-GHz band. Figures 12 and 13 show the radiation pattern of the fabricated antennas in the E-plane and H-plane. The rows of the metalized via holes placed around the edge of the substrate eliminate the existence of a half-mode SIW that could be a source of undesirable parasitic radiation. In this way, the Eplane radiation pattern of the proposed antennas has a lower ripple. The simulated H-plane radiation patterns are affected by the reflections from the metal block of the transition. In the case of the fabricated antennas, these reflections are suppressed using a high-frequency absorbing material and thus the transition has a very low influence on the radiation pattern. The measured Hplane radiation patterns are affected by an antenna positioner holder in the left half plane (elevation angle from 2170 to 210 ). The measured gain patterns of the antennas validate sufficiently the simulated ones. CONCLUSIONIn this letter, two SIW slot antennas have been proposed for the 60-GHz band. The antennas are characterized by low profile, compact size, low-cost fabrication, easy to design, and the ability to produce two different radiation patterns in the wide frequency band depending on the placement of the group of slots. On the basis of our research interest, the one-sided slot antenna is utilized for channel characterization of 60-GHz body centric communications and the double-sided slot antenna for experimental measurement of 60-GHz intravehicle signal propagation.A broadband, high-gain substrate-integrated waveguide (SIW) slot antenna fabricated on a PCB is presented in this article. Measured return loss reaches 25 dB at 45 GHz with the bandwidth of 4.72 GHz. The simulated gain is 9.6 dBi at 46.2 GHz and the efficiency is 96%. The measured gain is 7.8 dBi at 46.2 GHz. Good agreement is achieved between measured and simulated antenna patterns and return losses. It is shown that the antenna behavior can be enhanced by oversizing the bottom ground and properly selecting dimensions of top metal.

A Dual-Band High-Gain Substrate Integrated Waveguide Slot Antenna for 5g Application

“…This approach produces tiny cavities with good microwave performance while preserving the original SIW cavity's field distribution [4][5][6]. In [7][8][9][10][11][12][13][14][15][16], high gain, low-profile SIW antennas for dual-band application are presented by introducing different geometries and cavities in the structure. In literature, the proposed geometries are complex in design.…”

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.…”

Wideband low cost FR4 epoxy based antenna with H‐shaped slot for V‐band applications

“…In Reference 17 a pair of triangular slots are used with the SIW antenna to reach a dual-band radiation characteristic. Different shaped slots, like rectangular 18,19 and circular, 20 are implemented with SIW cavity backed structures to reach the desired resonance frequencies. Although good results are obtained in these studies, an expensive Rogers material is used with the reported antennas.…”