Copyright © 2016 Authors. 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 (2.23) (2018) 201-204 International Journal of Engineering & Technology Website: www.sciencepubco.com/index.php/IJET Research paper On the Parameters consideration & analysis of menderline antenna for wireless sensor networks Harish Rajurkar 1 , Dr. Sudhir Akojwar 2 1 Research Scholar, Rajiv Gandhi College of Engineering Research & Technology, Chandrapur, India 2 Associate Professor, Senior Member IEEE, Government Engineering College. Chandrapur, India *Email: harish529@rediffmail.com Abstract The objective of this paper is to present an analysis of menderline monopole antennas, which are applicable to wireless sensor networks in agricultural. In this paper, a 2.4 GHz Menderline Monopole Antenna (MLMA) is proposed for wireless sensors network. This work presents the detailed analysis of menderline antenna and variation of mender line parameter on antenna performance. A MLMA is modeled at 2.4 GHz with substrate of FR4 with dielectric constant (εr) of 4.4. The performance of the MLMA is enhanced by usi ng optimum geometry. The better performance in terms of bandwidth and impedance matching is found. For the proposed MLMA, the bandwidth of 149MHz and return loss of -23.98dB is obtained. The proposed work shows good performance of MLMA, in terms of geometric size, bandwidth and return loss which makes it suitable for wireless sensor network. Keywords: Wireless sensor network, MLMA, inset feed, VSWR, Return loss, bandwidth 1. Introduction There has been a significant interest in designing of wireless sensor network with low power, low cost & small size. Wireless Sensor Network (WSN) attracted the interest of many researchers in last few years.[1] WSN is characterized by nodes with a low profile, limited power and sparse energy resources, which have the ability to collaborate with each other, and to sense, and react to the world that surrounds them. Now a days “Plug & play” system used in WSN, requires small volume solution. The antennas with low size are always preferred for WSN.MLMA technology provides small volume solution. With the mender line the antenna length can be shortened. MLMA has some advantages, it is electrically small, low profile antenna and has simple structure which gives higher bandwidth [7].The MLMA is the small volume solution over the traditional rectangular or square shape patch antenna. This paper organized as- Section II discusses menderline monopole antenna & proposed design. Section 2 discusses the mender design, section 3 discusses the results of the proposed antenna & the effect of mender line spacing & width on return loss, gain, VSWR & bandwidth discussed. Section 4 concludes the observations from the proposed MLMA. 2. Menderline antenna Mender line antenna was first invented by J.Rashid & Chen-To Tai in 1982. MLMA are the most widely used antenna for various wireless sensor networks [WSN]. Now a days, WSN nodes demands small size and wider bandwidth antennas.[3,4] Most of the previous work proposes various methods for reducing the size of the monopole. But the reducing the size of monopole ended up with certain drawbacks of reduction in bandwidth and antenna efficiency. WSN, incorporating a compact size antenna can reduce part of the overall sensor node. According to Harold A.Wheeler [5]. A compact antenna defined as an antenna occupying a small fraction of one radiansphere in space and its greatest dimension is less than one-quarter wavelength. As MLMAs are radiating in all directions, they are preferred for WSN. In general the size reduction techniques in resonant antennas can be categorized into three classes, [6] a) The geometrical deformation of the antenna b) The insertion of various types of lumped loads c) The use of different coating materials In the proposed design, size reduction is achieved by the geometrical deformation of the antenna. MLMA are the antenna with a conductor which is folded back and forth (horizontal and vertical direction) to get required resonance. The some of the important parameters that must be considered for designing MLMA are, number of turns (N), mender spacing (S) & width (W).The basic structure of a MLA is shown in the figure 1.The resonant frequency of the MLMA can be calculated by using following equations. ] 1 ) 8 [log( ) 2 log( ] 1 ) 2 [log( 4     b l Nb l Nw r bf c r f c   (1) Where f is resonant frequency, c is the speed of light, w is antenna width, l is antenna length, a is the pitch, b is conductor diameter & N is the number of turns. The width of the patch can be determined by following equations following equation. ) 1 / 2 (   r f c wp  (2)