A Novel Compact Tri Band Notched Uwb Monopole Antenna

Abstract

A novel compact (20×22 mm 2 ) triple band eliminated monopole antenna for ultra-wideband (UWB) applications is presented. A novel radiating patch with reduced ground plane is utilized for achieving a −10 dB impedance bandwidth of 3. 28-13.28 GHz. An upper inverted U-shaped slot is introduced into the radiating patch to notch C-band (3.68-4.19 GHz), and a lower inverted U-structured slot is utilized to eliminate WLAN band (5.18-5.82 GHz) interference. The interference due to down link of X-band (7.27-7.87 GHz) is rejected by via hole connected between patch and rectangular strip printed above the defected ground structure. The proposed antenna has nearly stable radiation patterns, and realized gain over UWB frequency range makes it suitable for recent portable wireless communication applications. INTRODUCTIONIn 2002, the Federal Communications Commission (FCC) assigned an unlicensed UWB band from 3.1-10.6 GHz for commercial wireless applications. Recently, various types of Printed Monopole Antennas (PMA) are manufactured for high speed, low profile, short range, and wide bandwidth wireless technologies. Many monopole antennas have been reported to obtain UWB bandwidth; however, systems like 5G [1] (3.3-3.7 GHz), Worldwide Interoperability for Microwave Access, WiMAX [2] (3.3-3.6 GHz), C-band [3] (3.7-4.2 GHz), Wireless Local Area Networks, WLAN [4] (5.15-5.825 GHz), down link of X-band satellite communication systems [5] (7.25-7.75 GHz) may cause electromagnetic interference (EMI) with UWB systems. To suppress EMI, discrete band-stop filters are used with UWB antennas; however, it is complex and costly. In [6], an H-structured slot is etched into a mapleleaf shaped radiator to eliminate 5-6.0 GHz frequency band signals. Three semicircular slots into a radiator are etched to reject 5. 15-5.825 and 7.25-7.75 GHz bands. A T-structured parasitic element is introduced to notch 4.9-6.1 GHz signals in [7]. In [8], a complementary split ring resonator notches 5-6 GHz frequencies. Moreover, the UWB radiators are designed with single, double, and multiple notched bands [9][10][11][12]. To design an effective UWB radiator with compact size and reduced mutual coupling between band eliminated elements, the proposed antenna is designed.In this article, a novel UWB radiator is etched with two inverted U-structured slots and a via hole to eliminate C, WLAN, and downlink of X bands, respectively. The simulated and measured results of S 11 , constant realized gain, surface current distribution and nearly stable radiation patterns of proposed antenna are observed over 3.28-13.28 GHz bandwidth. In the following sections, the design procedure and parametric study of proposed antenna are observed. ANTENNA DESIGN AND DISCUSSIONThe proposed radiator with microstrip feed is depicted in Figure 1, and the optimized dimensions are given in Table 1. The proposed antenna is printed on an FR-4 substrate with r = 4.4 along with a 50 Ω with a microstrip line of dimension W F × (L F 1 + L F 2 ).

A high bandwidth dimension ratio compact super wide band-flower slotted microstrip patch antenna for millimeter wireless applications

“…Thus, the tapered micro strip line feed increases the bandwidth of FSMPA over a wide bandwidth as in Ref. [ 22 ].

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A novel compact semicircular defected ground structure ultrawideband monopole antenna integrated with Ku band for breast cancer detection

“…Finally, the proposed antenna structure AntΨ4 as shown in Figure 3D is obtained by tapering the microstrip line feed. The tapering of microstrip line feed 22 of AntΨ4 provides a very wide spectrum of 3.51–18.58 GHz with FBW of 136% with a span of 15,070 MHz as depicted in Figure 4. Thus, the proposed structure of antenna AntΨ4 can provide the impedance bandwidth of ultrawideband as well as Ku band (12–18 GHz) by utilizing SC‐DGS and a taper strip line feed.…”