“…The DR structures are regularly used to measure the properties of dielectric materials in the microwave and millimeter wave (Del Monaco et al., 1995; Sheen, 2008). The DRs are used in different wireless communication devices as the voltage‐controlled oscillator (Sakamoto et al., 1999), filters (Amari & Bekheit, 2005; Dwivedi et al., 2014; Hu & Wu, 2013; Memarian & Mansour, 2009; Panariello et al., 2013; Pidgurska, 2014; Pidhurska & Trubin, 2015; Zhang & Mansour, 2007, 2009), and antennas (Chen & Wong, 2017; Kianinejad et al., 2016; Singh & Sharma, 2010; Vipul & Panchal, 2017). Several innovative DR filters (Amari & Bekheit, 2005; Dwivedi et al., 2014; Hu & Wu, 2013; Memarian & Mansour, 2009; Panariello et al., 2013; Pidgurska, 2014; Pidhurska & Trubin, 2015; Zhang & Mansour, 2007, 2009) were designed.…”