Copyright © 2018 Kalyan Rayavaram et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. International Journal of Engineering & Technology, 7 (1) (2018) 57-64 International Journal of Engineering & Technology Website: www.sciencepubco.com/index.php/IJET doi: 10.14419/ijet.v7i1.8822 Research paper Compact UWB microstrip antenna with quadruple band-notched characteristics for short distance wireless tele-communication applications Kalyan Rayavaram 1 *, K.T.V.Reddy 2 , Kesari Padma Priya 3 1 Department of Electronics and Communication Engineering, JNTUniversityAnantapur, Anantapuramu, Andhra Pradesh, India 2 IETE HQ, New Delhi, India 3 Department of Electronics and Communication Engineering, UCEK, JNTUniversityKakinada, Kakinada, Andhra Pradesh, India *Corresponding author E-mail: r.kalyanreddy@gmail.com Abstract In this paper, the design and simulation of a compact ultra-wide band (UWB) microstrip antenna with quadruple band-notched character- istics for short-distance wireless telecommunication applications were explored. The design process of the antenna is carried on FR4 substrate with dielectric constant 4.4, loss tangent 0.02, thickness of 0. 8mm and the size of the proposed antenna are 30×20 mm 2 . The rectangular monopole antenna endures a rectangular radiating patch with chamfered bevel slots on the top side, and a defective ground planed on the bottom side of the substrate. To realize single, dual, triple and quadruple band notch characteristics, slot-1 is created on the patch to achieve first notch at 3.5 GHz, which eliminates WIMAX signal, slot-2 is created on the patch to achieve second notch at 4.6 GHz, which eliminates INSAT signal, slot-3 is created on the patch to achieve third notch at 5.5 GHz, which eliminates WLAN signal and also fourth notch is created at 9.5GHz which eliminates X-band frequency with slot-1 outer length. The proposed antenna is well miniaturized and can be easily integrated with any compact devices. The simulated result shows that proposed antenna gain a good range of UWB from (2.6 GHz to 13.4 GHz). Keywords: Band Notched Characteristics; Chamfered Bevel Slots; Defective Ground Plane; Monopole Antenna; Ultra-Wide Band. 1. Introduction In wireless communication technology Ultra-Wideband (UWB) is a widely admired and attractive technique used for short-range communication applications. From the past few years, UWB have to become the highlight of wireless communication due to ad- vantages of less power spectral density, maximized data rate, low power utilization and many others. Allocation of bandwidth rang- ing from 3.1 to 10.6 GHz was done by the Federal Communica- tion Commission (FCC) In February 2002 to be used for short- range communication purposes, by far the demand for UWB in- creasing rapidly [1]. A lot of research on UWB system brought some challenges, including their impedance matching, compact size, low manufacturing cost, etc., which are introduced while designing an antenna for UWB applications. The operating fre- quency of UWB allocated by FCC includes more narrowband wireless standards that have been allocated to share some part of this spectrum. These include INSAT 4.6GHz, wireless local area network (WLAN) services 5.5GHz etc. which interfere with the UWB system. So somewhere its needed an antenna with band notched property that can diminish the unwanted interferences from this coexisting wireless system rather than by using an addi- tional band stop filter. There are various methods, which are help- ful for introducing a notch in UWB antenna. The most commonly used technique is by adding different slots on the radiating materi- al or in the ground plane or also on the feed line. Different shapes are used like V shaped slot is used on the patch to create band notch characteristics [2]. As reported, a T-shaped slot in the radiat- ing patch provides strong notch band rejections up to VSWR = 26, which is tuneable over a wide frequency range from 3.55 GHz to 6.80 GHz [3], A H-shaped slot is used in the elliptical open ended microstrip feed line to achieve band notched characteristics. The band rejection characteristics can be controlled by varying the dimensions of H slot [4], U shaped filter is used on a UWB planer monopole antenna to eliminate WLAN frequency [5]. A band notched frequency is created by placing a C-shaped slot on the elliptic radiating patch. The slot length contributes to both the notch bandwidth and center frequency of notch while the slot width contributes mainly to the bandwidth of notch [6], Two stop bands are created by embedding a T-shaped stub in the square slot of the radiation patch and a pair of U-shaped parasitic strips beside the feed line on the substrate [7], two short circuit folded stepped impedance resonators are used two achieve dual band notched characteristics. the folded SIRs are inserted for stopping unwanted frequency bands [8], a microstrip open-loop resonator is used on the ground plane to generate frequency band notch [9]; a modified complementary split-ring resonator (CSRR) is placed inside the inner patch to obtain band rejection characteristics [10], a pair of bended dual- L-shape branches are attached to the slotted ground to achieve dual band notched characteristics [11], Two stop bands are obtained by placing four u-shaped slots with a different dimen- sion on the radiating patch, and the stop band bandwidth can be controlled by adjusting the three u-slots dimension [12], Two notched frequency bands are created by a pair of C-shaped slots and a U-shaped slot placed on the radiating patch. Good gain and radiation patterns in the operating frequency have been noted [13], by adding a meandering slot on the radiation patch and, with add-