A Novel Design of Parasitically Gap Coupled Patches Forming an Elliptical Patch Antenna for Broadband Performance

Abstract

A novel single layer assembly of gap coupled elements in elliptical shape is proposed in this communication to achieve broadband performance. Among the five patches considered in the present assembly, two pairs of patches having different patch areas are arranged around an edge truncated elliptical patch. The central edge truncated elliptical patch is fed through an inset feed arrangement and the other patches are parasitically gap coupled to the central patch. With such an arrangement, an enhanced impedance bandwidth of 2.45 GHz (or 36.2%) with respect to central frequency 6.1 GHz is achieved. Three resonant modes are excited with this arrangement giving improved bandwidth and gain in comparison to a conventional elliptical patch antenna. The simulated radiation patterns of proposed arrangement of patches suggest that these are identical in shape and direction of maximum radiations is directed normally to assembly of patches.

Anchor shape gap coupled patch antenna for WiMAX and WLAN applications

“…A compact dual band (3.3-4.2 and 5-6 GHz) notched monopole antenna of circular disc shape with anchor shape strip is presented (Ojaroudi et al, 2015) for ultra-wideband (2.69-12.53 GHz) applications. It is established from the perusal of the patch area of the proposed antenna and other antennas reported in Sharma (2014), Kandwal et al (2013); Pal et al (2011), Zaman et al (2014; Ren and Jiang (2016); and Ojaroudi et al (2015) that the patch area of the proposed antenna is lesser as compared to other reported antennas (cf. Figure 1), except the antenna reported in reference (Ojaroudi et al, 2015).…”

“…A single layer gap-coupled elliptical shaped patch antenna (area-600 mm 2 ) is reported (Sharma, 2014), with a maximum gain of 4.0 dBi and variation of 1.6 dBi at 6.1 GHz. Bandwidth enhancement over the conventional elliptical shape antenna is observed in Sharma (2014).…”

“…A single layer gap-coupled elliptical shaped patch antenna (area-600 mm 2 ) is reported (Sharma, 2014), with a maximum gain of 4.0 dBi and variation of 1.6 dBi at 6.1 GHz. Bandwidth enhancement over the conventional elliptical shape antenna is observed in Sharma (2014). Two gap coupled concentric rings antenna structure with defected ground for dual band operation in C-band (4.75 GHz) and X-band (10.2 GHz) frequency spectrum is reported (Kandwal et al, 2013), but with a larger structure size (14,400 mm 2 ) as compared to other gap coupled structures.…”

High efficiency broadband ellipse antenna array with tapered parallel-double transmission line feed network

“…In this paper, a broadband array antenna with high efficiency and low profile is presented to satisfy the requirement of vehicle application of remote wireless communication system. The multiple-layer antenna element consists of an ellipse dipole referred from [14,15], a coupled patch and a ground as reflector, which shows a broadband performance in terms of radiation pattern and impedance matching. Then, a broadband tapered PDTL feed network is adopted to a 4 Â 8 antenna array.…”

Fractal microstrip patch antennas for dual-band and triple-band wireless applications

“…The most serious limitations of microstrip antenna are its narrow bandwidth and poor gain (Balanis, 2005). Various techniques such as shorting post loading (Deshmukh et al, 2013;Kumar and Singh, 2011;Singh et al, 2010), gap-coupling (Kumar, 2014;Kumar and Singh, 2009;Mishra et al, 2019;Sharma, 2014), metamaterials (Yem and Lan, 2018), photonic band gap crystals (Sudha and Vedavathy, 2001), frequency selective surface (Yahya et al, 2018), defected ground structure (Ajay et al, 2019;Kumar and Masa-Campos, 2015;Kapoor et al, 2020;Njokweni and Kumar, 2020), etc., can be used to improve the antenna performance. Multiband antennas are required to be used for different bands applications.…”