Compact Broadband Microstrip Triangular Antennas Fed By Folded Triangular Patch for Wireless Applications

Abstract

This study presents two new designs of reduced size broadband microstrip patch antennas for ultra-wideband (UWB) operation. A folded triangular patch’s feeding technique, V-shaped slot, half V-shaped slot and shorting pins are employed to design the suggested antennas. The shorting pins are applied at the edge of structures to miniaturize the size of the patches. The suggested design with the V-shaped slot provides the measured impedance bandwidth (S11˂-10 dB) of 3.91-12 GHz (101.7%) for broadband application. In the suggested design with the V-shaped slot, the wide bandwidth with an acceptable size reduction is achieved. By introducing a suggested half design with the half V-shaped slot, the impedance bandwidth of the proposed half structure is improved from 4 to 17.22 GHz. The half design includes a measured impedance bandwidth of 124.6% with reduced size of more than 93% compared to the corresponding full design and an enhanced measured bandwidth of 23%. The obtained radiation and impedance results show that the suggested designs are applicable for wideband operation. Besides, the effects of some basic concepts and surface currents on the suggested structures are investigated to explain their broadband performance.

Miniaturized High Gain Broadband 16‐Element MIMO Array Using Planar Artificial Magnetic Conductor With Enhanced Isolation for WLAN/WiMAX Applications

“…Figure 2 demonstrates the geometry of a suggested planar AMC unit cell. The proposed unit cell is considered based on the patch with square and rhomboid slots (Malekpoor & Shahraki, 2021). The realized size of the proposed AMC patch and inserted square slots are optimized in the full wave simulator by parametric study.…”

“…Z. Xu and Deng (2020) studied a compact MIMO antenna with an operating band spanning 3.33–3.67 GHz for 5G mobile terminals. Various approaches in previous studies were introduced to enhance the bandwidth of microstrip antennas (Malekpoor & Shahraki, 2021; Wen et al., 2020; Wong et al., 2016; K. D. Xu et al., 2018). Recent studies use the broadband AMC surfaces in low‐profile microstrip antennas with improved properties by enhancing the integrated circuit technologies (Alibakhshikenari et al., 2018; Feng et al., 2017; Joubert et al., 2012; J. Liu et al., 2020; Raad et al., 2013; Turpin et al., 2014; Yan et al., 2015; Zhong et al., 2015).…”

“…Xu and Deng (2020) studied a compact MIMO antenna with an operating band spanning 3.33-3.67 GHz for 5G mobile terminals. Various approaches in previous studies were introduced to enhance the bandwidth of microstrip antennas (Malekpoor & Shahraki, 2021;Wen et al, 2020;Wong et al, 2016;K. D. Xu et al, 2018).…”

Radiation Properties Improvement of 1 × 4 Array of Wideband Printed Antenna Supported by AMC Surface for Vehicular MIMO Systems

“…(2018). Diverse approaches in previous studies are introduced to ameliorate the bandwidth of microstrip antennas (Jam & Malekpoor, 2016a, 2016b; K. D. Xu et al., 2018; Malekpoor & Shahraki, 2021).…”

High gain, high isolation, and low‐profile two‐element MIMO array loaded by the Giuseppe Peano AMC reflector for wireless communication systems

“…It is known that the artificial magnetic conductor (AMC) structures introduce a privilege like a perfect magnetic conductor with in-phase reflection response in a certain range. The uses of AMC periodic surfaces in distinct combinations are provided to show better efficiency [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. Among these studies, a mushroom-shaped AMC structure is usually applied for diverse arrangements as a beneficial approach to achieve the low-profile structures with a higher efficiency [11].…”