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Gain enhancement over a wideband in CPW-fed compact circular patch antenna

  • Kirti Vyas (a1) (a2), Garima Sanyal (a2), Arun Kumar Sharma (a2) and Pramod Kumar Singhal (a3)


The present paper reports the gain enhancement over a wideband (12–15 GHz) in a coplanar waveguide (CPW)-fed circular patch antenna with circular defected ground structure (DGS). Two compact coplanar circular antennas have been designed and fabricated with and without DGS of same volume 18 × 20 × 1.6 mm3, built over FR4-epoxy substrate (εr = 4.4). Gain enhancement has been achieved by optimizing the current distribution with suitable DGS. For this purpose, structural designs have been optimized by parametric simulations in HFSS and CST MWS. Both the antennas can perform well in variety of wireless communication including WLAN IEEE 802.11 g/a (5.15–5.35 GHz and 5.725–5.825 GHz) and X-band applications including short range, tracking, missile guidance, and radar communication that ranges roughly from 8.29 to 11.4 GHz. The measured experimental results show that impedance bandwidth (S11 < −10 dB) of antenna with DGS is 100%. The antenna with DGS offers gain improvement by 2.7 dB for 13 GHz and 7 dB for 14 GHz. The performance of antenna with DGS is compared to conventional CPW-fed circular patch antenna (without DGS) in terms of reflection coefficient, radiation characteristics, and gain.


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Corresponding author: K. Vyas Email:


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[1]Abdelaziz, A.A.: Bandwidth enhancement of microstrip antenna. Progr. Electromagn. Res., 63 (2006), 311317.
[2]Nishiyama, E.; Aikawa, M.: FDTD analysis of stacked microstrip antenna with high gain. Progr. Electromagn. Res., 33 (2001), 2943.
[3]Ali, A. et al. : W-shaped enhanced bandwidth patch antenna for wireless communication. Wirel. Pers. Commun., 43 (2007), 12571265.
[4]Abbaspour, M.; Hassani, H.R.: Wideband star shaped microstrip patch antenna. Progr. Electromagn. Res. Lett., 1 (2008), 6168.
[5]Ansari, J.A.; Ram, R.B.: Broadband stacked U-slot microstrip patch antenna. Progr. Electromagn. Res. Lett., 4 (2008), 1724.
[6]Liu, H.; Li, Z.; Sun, X.; Mao, J.: Harmonic suppression with photonic bandgap and defected ground structure for a microstrip patch antenna. IEEE Microw. Wirel. Compon. Lett., 15 (2) (2005), 5556.
[7]Lin, X.-C.; Wang, L.-T.: A wideband CPW-fed patch antenna with defective ground plane. in IEEE Antennas Propag. Soc. Int. Symp., vol. 4 (2004), 3717–3720.
[8]Weng, L.H.; Guo, Y.C.; Shi, X.W.; Chen, X.Q.: An overview on defected ground structure. Progr. Electromagn. Res. B, 7 (2008), 173189.
[9]Dong, L.; Zhang, Z.; Li, W.; Fu, G.: A compact CPW-fed monopole antenna with triple bands for Wlan/Wimax applications. Progr. Electromagn. Res. Lett., 39 (2013), 103113.
[10]Lin, X.C.; Yu, C.-C.: A dual-band CPW-fed inductive slot-monopole hybrid antenna. IEEE Trans. Antennas Propag., 56 (1) (2008), 282285.
[11]Chen, J.-S.: Dual-frequency annular-ring slot antennas fed by CPW feed and microstrip line feed. IEEE Trans. Antennas Propag., 53 (1) (2005), 569573.
[12]Jiao, J.J., Zhao, G.; Zhang, F.S.; Yuan, H.-W.; Jiao, Y.-C.: A broadband CPW-fed T-shape slot antenna. Progr. Electromagn. Res., 76 (2007), 237242.
[13]Dastranj, A.; Abiri, H.: Bandwidth enhancement of printed E-shaped slot antennas fed by CPW and microstrip line. IEEE Trans. Antennas Propag., 58 (4) (2010), 14021407.
[14]Yoon, J.H.: Fabrication and measurement of rectangular ring with open ended CPW fed monopole antenna for 2.5/5.2-GHz WLAN operation. Microw. Opt. Technol. Lett., 48 (8) (2006), 14801483.
[15]Yang, F.; Rahmat-Samii, Y.: A reconfigurable patch antenna using switchable slots for circular polarization diversity. IEEE Microw. Wirel. Compon. Lett., 12 (3) (2002), 9698.
[16]Ray, K.P.: Design aspects of printed monopole antennas for ultra-wide band applications. (Hindawi Publishing Corporation), Int. J. Antennas Propag., 2008, 713858, doi: 10.1155/2008/713858.
[17]Simons, R.N.: Coplanar Waveguide Circuits, Components, and Systems, John Wiley & Sons, New York, 2001.


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Gain enhancement over a wideband in CPW-fed compact circular patch antenna

  • Kirti Vyas (a1) (a2), Garima Sanyal (a2), Arun Kumar Sharma (a2) and Pramod Kumar Singhal (a3)


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