Electromagnetic band‐gap based corrugated structures for reducing mutual coupling of compact 60 GHz cavity‐backed antenna arrays in low temperature co‐fired ceramics

Abstract

Reducing the mutual coupling of antenna elements in 60 GHz phased arrays is an important issue because it directly affects the input impedance matching and radiation performances. This study presents an electromagnetic band-gap (EBG) based design using corrugated structures to reduce the mutual coupling between two closely placed antenna elements. An isolation enhancement of 3.6 to 10.3 dB was achieved from the proposed EBG-based corrugated structure over the unlicensed band of 57 to 66 GHz. Based on the available thickness of low temperature co-fired ceramics (LTCC) layered process, the authors built a prototype with a corrugation height of 0.7 mm and measured the port isolation and radiation performances. The experimental results show that using the corrugated design may reduce the mutual coupling by 2.1 to 4.4 dB compared with that without corrugation. In addition, the corrugated design under the thickness restriction of the LTCC process is discussed in this study. An alternative structure with an extended corrugation height is included, where the port isolation is improved by more than 3 dB over the entire band of 57 to 66 GHz.

A Review on Different Techniques of Mutual Coupling Reduction Between Elements of Any MIMO Antenna. Part 2: Metamaterials and Many More

“…Lee & Sun, 2008;Q. Li et al, 2014;Lu & Lin, 2013;Manimegalai, 2014;Mavridou et al, 2016;Mohamadzade & Afsahi, 2017;Mohamed et al, 2019;Mu'ath J et al, 2014;Payandehjoo & Abhari, 2009, 2014Qiu-Rong Zheng, Yun-Qi Fu, 2008;Radhi et al, 2019;Rajo-Iglesias et al, 2008;Sharma & Pandey, 2020;Shen et al, 2019;Soliman et al, 2015;Soukoulis, 2002;;S. D. Assimonis et al, 2012;Suntives & Abhari, 2013;Tan et al, 2019;Thakur et al, 2020;Toolabi et al, 2016;W.…”

“…Li et al, 2014). Similarly, many EBG structures have been studied in the literature, among them, few are going to be discussed here: 1-D EBG structure comprises of patterns of grids on the top patch with a metallic ground plane, and both are shorted by several vias (W. Wu et al, 2018); conventional mushroom EBG structure loaded with slots (Lu & Lin, 2013); 4 × 1 array configuration of a unit cell size (6.8 × 6.8 mm) unipolar EBG (Dabas et al, 2018); multi-layered EBG structure (T. Jiang et al, 2018); a novel uni-conductor EBG placed between patch antenna as represented in the Figure 5a (Mohamed et al, 2019); EBG structure based on MTM (Alibakhshikenari et al, 2019b); waveguided MTM realized by crossed-meander-line slits exhibit magnetic resonance as well as the bandgap property (X. M. Yang et al, 2012); another EBG ground structure can be viewed in Figure 5b (Mavridou et al, 2016); some famous uniplanar EBG structure (Abedin & Ali, 2005;Abidin et al, 2018;Farahani et al, 2010;Iqbal et al, 2019;Mohamadzade & Afsahi, 2017;Mu'ath J et al, 2014;Payandehjoo & Abhari, 2009;Soliman et al, 2015;Toolabi et al, 2016); dumbbell-shaped EBG structure (A. Yu & Zhang, 2003); electromagnetic soft surfaces realized by metal strips loaded with C-shaped slots (Chen et al, 2018); multilayer EBG structure (Exposito-Dominguez et al, 2012); MTM inspired EBG structure (Alibakhshikenari et al, 2019a) mushroom type EBG structure (J.…”

“…EBG, electromagnetic band gap. et al, 2019); a 2 × 5 EBG structure as represented inFigure 5c; split EBG structure(Tan et al, 2019); a novel and compact spiral EBG (Qiu-Rong Zheng, Yun-Qi Fu, 2008); EBG based corrugated structure(Lu & Lin, 2013); Tunable Double-Layer EBG structures…”

Antenna‐in‐package Designs in Multilayered Low‐temperature Co‐fired Ceramic Platforms

“…For the surface mounting method in LTCC, mostly flip-chip technique has been used to attach the RFIC chips to the surface of the LTCC substrate [28,42,43]. For example, in [42], a 2 × 2 circularly polarized patch antenna array is integrated with a 60 GHz Doppler CMOS radar chip in a LTCC substrate, as shown in Figure 7.13 (a).…”

Broadband antipodal tapered slot antenna array with low mutual coupling and high gain properties

“…Conventional decoupling methods mainly use parasitic metal structures, i.e. neutralisation line [2,3] and branches [4,5], electromagnetic bandgap structure, [6,7] and defective ground structure [8][9][10]. In addition, metamaterial-based decoupling mechanism has also been applied in many studies [11,12].…”