A Compact Patch Antenna for Ultrawideband Application M. Tarikul Islam , M. Samsuzzaman, M. M. Islam ,M.Z.Mahmmud, M.T. Islam Presented by Md. Tarikul Islam Patuakhali Science and Technology University

Presentation Outline Introduction Background Objective Antenna Design Results & Discussion Conclusion References ICISET-2016

Introduction Overview: Geographical Location: The main campus of the PSTU is located at  about 20 km north from the district town of Patuakhali and  about 38 km south from the divisional city of Barisal. The outer campus is situated at Babuganj under Barisal district. Total Students: 3000 Faculty: 8 ICISET-2016

Introduction A compact and wideband antenna is desirable for all modern wireless communication systems . Conventional microstrip patch antenna is attractive for the low profile and light weight but repulsive for the large lateral size and narrow impedance bandwidth. Thus, it is not readily suitable for the emerging Ultra-wideband(UWB) technology Radio systems based on UWB technology offer opportunities for high resolution radar imaging, transmission of high data rate signals and low probability of interrupt, especially in multi-user network applications, etc. ICISET-2016

Ultra wideband (UWB) Wireless technology for transmitting digital data over a wide spectrum of frequency bands with very low power. Wide bandwidth : > 500MHz Advantages Wide Bandwidth Low power consumption High data transmission rate High speed Low cost Low complexity Applications Communication Systems (Wireless Personal Area Network) Sensors Networks Radar and Imaging Positioning and Tracking Wireless Body Area Network ICISET-2016

Background In the past, many impedance bandwidth-enhancement techniques for microstrip patch antennas have been developed, including the employment of a thick substrate, parasitic patches, U-shaped-slot patch, and L-probe feed, etc. However, all these techniques achieve a bandwidth of approximate 80%. ICISET-2016

Background In 1998, a new balanced antenna was proposed by Guillanton et al. for UWB application. A double-sided printed bow-tie antenna for UWB application was proposed by(Kiminami et al., 2004) for Short range wireless communication technology. Small UWB Planar Monopole Antenna was proposed in 2012 where a diamond-shaped-patch that covers the ultra-wideband (UWB) frequency range by Foudazi and Hassani. A high-performance Hibiscus petal pattern patch with tapered microstrip-fed line and partial trapezoid ground plane UWB antenna(Mahmud et al., 2016) was presented. ICISET-2016

Broadbanding Techniques Rectangular slotted patch Microstrip line-fed Tapered slotted ground Copper sheet. ICISET-2016

Objectives To design a compact microstrip patch antenna for ultra-wideband application. ICISET-2016

Desired Ultra wideband Specifications Antenna Characteristics UWB Antennas Physical dimension Compact, Low profile Operating Frequency Band 3.1-10.6 GHz Return Loss ≤ 10 dB VSWR ≤ 2.0 Input Impedance 50 Ω Gain ≥ 3 dBi Efficiency ≥ 70% Polarization Linear Radiation Pattern Omni-directional ICISET-2016

Antenna Geometry & Design Bottom View Top View Total View Side View W L wP Ln L1 L2 L3 wn l h w1 21.44 mm 23.53 2.11 4 8.66 7.52 9.30 8.244 7.24 1.6mm 1.98 ICISET-2016

Design Tools The proposed antenna have been predicted and optimized using a frequency domain three-dimensional full wave electromagnetic field solver (Ansoft HFSS) and Computer Simulation Technology (CST) . Operating frequency: 3.49-12 GHz. ICISET-2016

Printed antenna and Measurement Technique The antenna is printed and measured in UKM lab, Malaysia. ICISET-2016

Results: Effect of patch shape over UWB Above figure shows the different patch shape starting with proposed one. We have fed the rectangular slotted patch with a 50 Ohm transmission line. Here, the rectangular slotted patch element applied as the microstrip termination line which gives more wideband performance compared to the other ones. ICISET-2016

Results: Effect of ground over UWB Figure represents the reflection co-efficient (s11) of the proposed antenna with and without ground plane. We can see that by using tapered slot ground we are able to gain ultra wideband frequency. ICISET-2016

Results: Reflection Co-efficient The reflection coefficient of the proposed antenna is shown in above figure. From the curves, it is clearly seen that the proposed antenna has bandwidth of 109.8% (10 dB return loss) which ranges 3.49 – 12 GHz, which covers the UWB frequencies. ICISET-2016

Simulated Peak Gain & Efficiency Maximum gain is 5.4 dBi Average gain is 4.2 dBi Maximum efficiency is 98.3% Average efficiency is 92.7% ICISET-2016

Simulated 2D Radiation Pattern 3.5 GHz 6.5 GHz 9.5 GHz E-Plane Omnidirectional Omnidirectional Omnidirectional Omnidirectional H-Plane ICISET-2016

Acquired Result Overview Antenna Characteristics UWB Antennas Physical dimension 21.44 × 23.53 mm2 Operating Frequency Band 3.49-12 GHz Return Loss ≤ 10 dB VSWR ≤ 2.0 Input Impedance 50 Ω Gain ≥ 4.2 dBi Efficiency ≥ 92.7% Polarization Linear Radiation Pattern Omni-directional ICISET-2016

Conclusion A compact rectangular slotted patch with tapered shaped ground microstrip antenna for UWB technology is presented. Results of a wideband patch antenna covering 3.49 to 12 GHz frequency have been presented. Feeding technique, the optimized shape of the patch slots made it possible to significantly improved bandwidth of 109.8% at 10 dB return loss. Low profile characteristics and smaller in size of copper sheet have been used for easier fabrication. The radiation mechanism of the proposed antenna is analyzed, and results are also provided. ICISET-2016

References K. Kikuta and A. Hirose, "Compact Folded-Fin Tapered Slot Antenna for UWB Applications," IEEE Antennas and Wireless Propagation Letters, vol. 14, pp. 1192-1195, 2015. A. Dastranj, A. Imani, and M. Naser-Moghaddasi, "Printed wide-slot antenna for wideband applications," IEEE Transactions on Antennas and Propagation, vol. 56, pp. 3097-3102, 2008. M. Mahmud, S. Kibria, M. Samsuzzaman, N. Misran, and M. Islam, "A New High Performance Hibiscus Petal Pattern Monopole Antenna for UWB Applications," Applied Computational Electromagnetics Society Journal, vol. 31, 2016. R. Azim, M. T. Islam, and N. Misran, "Microstrip line-fed printed planar monopole antenna for UWB applications," Arabian Journal for Science and Engineering, vol. 38, pp. 2415-2422, 2013. ICISET-2016

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