High-Gain Stacked Minkowski Fractal Patch Antenna with Superstrate for 60GHz Communications
A high-gain stacked Minkowski fractal patch antenna with superstrate and H-shaped aperture coupling for 60GHz communication is proposed.A superstrate is added above the ground plane in order to increase the gain.The maximum simulated gain of the antenna w
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Abstract. A high-gain stacked Minkowski fractal patch antenna with superstrate and H-shaped aperture coupling for 60GHz communication is proposed.A superstrate is added above the ground plane in order to increase the gain.The maximum simulated gain of the antenna with superstrate reaches 14.1dBi at 60GHz and is more than 10dBi all over the 60GHz band(from 57GHz to 64GHz). It is noted that by stacking the antenna and using H-shaped aperture coupling the bandwidth can be increased up to 9.7% (56.4GHz—62.1GHz) which of the conventional Minkowski fractal patch antenna is only 3%. Keywords: 60GHz, high-gain, Minkowski, fractal, stacked, superstrate.
1 Introduction The application of 60GHz band technique has been studied recently for the spectrum is declared to be unlicensed all over the world[1].IEEE 802.15.3c supports more than 7Gbps in 60GHz communication compared with USB2.0(480Mbps) and IEEE 802.11n(300Mbps). The mmWave technique provides a solution for ultra-high-speed wireless transmission between electronic products in a short range, which is quite suitable for WPAN applications. Moreover antenna is a key part of the 60GHz communication system. High gain, high efficiency and broad bandwidth are required characteristic of the antenna. Patch antenna is a candidate of solution for its compact size, light weight and mature process of manufacture. Because of the self similarity and space filling property the fractal antenna[3] has got a characteristic of size reduction and multi-band[4]. So a lot of research on the fractal antenna has been carried out, e.g Kock fractal slot antenna[5] and Sierpinski fractal antenna[6]. However the fractal-shaped patch antenna has always exhibited narrow bandwidth performance which is around 3%.In paper[7], it is reported that to use stacked structure and H-shaped aperture coupling can improve the bandwidth performance of fractal patch antenna. Besides, it is noted that adding a superstrate above the ground plane can increase almost 9dBi in gain at 60GHz[8][9]. In this paper, a hybrid stacked Minkowski fractal patch antenna with superstrate for 60GHz communication is designed. The simulated results show that the antenna has got a bandwidth of 9.7% and a maximum gain of 14.1dBi at 60GHz. Besides, in order to show the effect of stacked structure and superstrate, a single layer Minkowski fractal patch H. Tan (Ed.): Knowledge Discovery and Data Mining, AISC 135, pp. 53–59. © Springer-Verlag Berlin Heidelberg 2012 springerlink.com
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Y. Shi and W. Zhang
antenna with superstrate and stacked Minkowski patch antenna without superstrate are also simulated. The manufacture of the proposed antenna is now in progress, more measurement results and analysis will be provided in the future.
2 Antenna Structure The size of the stacked Minkowski patch antenna with superstrate is 30mm*30mm. The side view of the proposed antenna is shown in Figure 1. The 50 Ω tapered microstrip feedline with a U-shaped tuning stub[10] is placed under the F4BM220 substrate for the purpose of bandwidth improvement. Fi
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