A Metamaterial-inspired Miniaturized Dual-Band Printed Directive Dipole Antenna for

GSM/Bluetooth/WLAN Applications Debdeep Sarkar1, Kushmanda Saurav2, Somak Bhattacharyya3, Kumar Vaibhav Srivastava4

Department of Electrical Engineering, Indian Institute of Technology Kanpur

Uttar Pradesh-208016, INDIA. 1debdeep1989@gmail.com, 2kushmandasaurav@gmail.com, 3bhattacharyya.somak@gmail.com, 4kvs@iitk.ac.in

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31st URSI General Assembly and Scientific Symposium, Beijing, China, 2014

A miniaturized design of printed dual-band directive dipole antenna

is proposed. Loading with complementary split ring resonators introduces

an additional lower-order resonance in the reference directive dipole. This

enables the proposed antenna to operate around 1.70 GHz and 2.42 GHz,

covering the GSM/Bluetooth/WLAN application bands. Furthermore,

defected partial ground structure is employed to improve impedance

matching in the lower order CSRR-induced band. Ansys HFSS simulations

that the proposed dual-band antenna has satisfactory far-field gains of 1.83

dBi and 3.76 dBi in the two respective operating bands.

DESIGN OF PROPOSED ANTENNA AND RESULTS

Fig. 1. Schematic Diagram of the proposed antenna (a) Top-view and (b) Bottom-

view: LS = 70 mm, WS = 70 mm, LF1 = LG = 30 mm, LF2 = 27 mm, LD = 20 mm, WF

= 1.5 mm, W1 = 6.2 mm, WA = 13 mm, LA = 15 mm, WM = 1 mm. Low cost FR4-

epoxy substrate (εr = 4.4, tan δ = 0.02) of thickness 0.8 mm is chosen.

Fig. 3. Comparison of S11 (in dB) versus frequency for the three cases, CASE-I:

Conventional planar dipole antenna without any CSRR loading and defected ground

structure, CASE-II: CSRR-loaded planar dipole antenna without defected ground,

CASE-III: Proposed Dual-band Antenna in Fig. 1. Matching unit shown in Fig. 2(b)

is used for all the three cases mentioned here.

1. F. J. Herraiz-Martínez, L. E. García-Muñoz, D. González-Ovejero, V. González-Posadas, and D. Segovia-

Vargas, "Dual-Frequency Printed Dipole Loaded With Split Ring Resonators", IEEE Antennas and Wireless

Propagation Letters, Vol. 8, pp. 137-140, 2009.

2. Dimitrios K. Ntaikos, Nektarios K. Bourgis, and Traianos V. Yioultsis, "Metamaterial-Based Electrically

Small Multiband Planar Monopole Antennas", IEEE Antennas and Wireless Propagation Letters, Vol. 10, pp.

963-966, 2011.

3. H. Cheribi, F. Ghanem and H. Kimouche, "Metamaterial-based frequency reconfigurable antenna",

Electronics Letters, Vol. 49 No. 5, 28th February 2013.

4. Debdeep Sarkar, Kumar Vaibhav Srivastava and Kushmanda Saurav, "A Compact Microstrip-fed Triple

Band-Notched Ultra-wideband Monopole Antenna", in IEEE Antennas and Wireless Propagation Letters,

Vol. 13, pp. 396-399, 2014.

5. Jiang Zhu, Marco A. Antoniades, and George V. Eleftheriades, "A Compact Tri-Band Monopole Antenna

With Single-Cell Metamaterial Loading", IEEE Transactions on Antennas and Propagation, Vol. 58, No. 4, pp.

1031-1038, April 2010.

6. Marco A. Antoniades and George V. Eleftheriades, "Multiband Compact Printed Dipole Antennas Using

NRI-TL Metamaterial Loading", IEEE Transactions on Antennas and Propagation, Vol. 60, No. 12, pp. 5613-

5626, December 2012.

7. Ahmed R. Raslan, Amr A. Ibrahim, and Amr M. E. Safwat, "Resonant-Type Antennas Loaded with CRLH

Unit Cell", IEEE Antennas and Wireless Propagation Letters, Vol. 12, pp. 23-26, 2013.

8. Kushmanda Saurav, Debdeep Sarkar and Kumar Vaibhav Srivastava, "A Via-less CRLH Unit-cell Loaded

Dual-Band Double-Sided Printed Dipole Antenna for GSM/Bluetooth/WLAN Applications", Proceedings of

IEEE International Symposium on Antennas and Propagation and USNC-URSI National Radio Science

Meeting in Orlando, Florida, USA, pp. 1358-1359, 2013.

Fig. 2. (a) Rectangular Complementary Split Ring Resonator (CSRR): a = b = 11

mm, c = 0.7 mm, d = g = 0.3 mm, g1 = g2 = 1 mm. (b) Matching unit (Zoomed

view): WS1 = 2.7 mm, LS1 = 5 mm, LS2 = 2 mm , WS2 = 2.1 mm.

CONCLUSIONS

A dual band printed dipole antenna with directive radiation pattern is

designed by loading with metamaterial-inspired CSRR-embedded patches.

Good impedance matching at the lower order frequency band is achieved by

use of a defected partial ground plane. The return loss characteristics and

far-field patterns of the proposed antenna are analyzed via full-wave HFSS

simulations. The proposed antenna is a good candidate for wireless

communication devices working in GSM/Bluetooth/WLAN range.

Fig. 4. Distribution of surface current magnitude on the antenna conductors at

(a) 1.70 GHz (strong concentration about the CSRRs) and (b) 2.42 GHz.

Fig. 5. 3D Radiation Pattern for the Proposed Dual Band Antenna (Fig. 1): (a) 1.70

GHz and (b) 2.42 GHz.

Fig. 6. Parametric study on the return loss of the proposed antenna (a) Effect of

CSRR width b. (b) Effect of ground slot length LA.