60‐ghz wideband circularly polarized antenna array based on TE ₃₄₀ ‐mode SIC and sequential rotation feeding technique

Abstract

The authors propose a 4 � 4 circularly polarized (CP) antenna array with wide impedance bandwidth and axial-ratio (AR) bandwidth and design the same for 60-GHz applications. The overall structure of the proposed antenna array consists of a cavity-back circular patch array and two layer feed-networks. The upper feed-network is with four TE 340 high-order mode substrate integrated cavities (SIC). Fed with SIC, circular patches with a pair of 42°-inclined slits can achieve circular polarization. In order to improve the AR bandwidth and gain performance, the substrate integrated waveguide (SIW) sequential rotation feeding technique is utilized in the lower feed-network. For proof of concept, the 4 � 4 array is fabricated and measured. Measured results show that −10-dB impedance bandwidth of the proposed antenna array is 27.2% from 52 to 68.4 GHz and 3-dB AR bandwidth is 18.9% from 55.7 to 67.3 GHz. Furthermore, the 3-dB gain bandwidth is 26.2% from 53 to 69 GHz with a peak gain reaching 19.3 dBic at 62 GHz.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

SIW-Based Circularly Polarized Antenna Array for 60 GHz 5G Band: Feasibility Study

“…Unfortunately, only outputs of simulations were provided for both the array concepts. In [7], an array consisting of circular patches was excited by rectangular SIW resonators. Compared to the presented design, an additional layer in the feeding structure is requested, and other array concepts differ from [7] marginally:…”

Broadband high‐gain low‐temperature cofired ceramic substrate integrated cavity antenna array based on high‐order mode for W‐band applications

“…Furthermore, in order to reduce the complexity of MMW antenna array, the high‐order‐mode technology is introduced to remove the internal sidewall between adjacent dominant‐mode SIW or SIC [14–16, 19, 20]. In ref.…”