Open Access Open Access  Restricted Access Subscription Access
Proposed geometry of broadband printed antenna with U-slot in ground plane

Broadband printed antenna with modified rectangular patch and U-slot in ground plane

Iram Nadeem, Dong-You Choi


A broadband patch antenna is presented with a modified rectangular patch containing three symmetrical slots and an asymmetrical slot. A U-slot is inserted into the ground plane, which enables a wide operational fractional bandwidth of 143% ranging 2.9–17.5 GHz. The modified rectangular patch offers acceptable omnidirectional radiation pattern at higher frequencies with radiation efficiency of 83 to 95%. The maximum achievable gain is 5.48 dBi across the entire bandwidth. The electromagnetic wave modeling is conducted using high frequency simulator structure (HFSS) and the circuit model is simulated with Advance Designing System (ADS) software. The housing effect is studied using vertical orientation of antenna to approximate its performance in the presence of conducting bodies. The proposed antenna architecture has small electrical dimension of 0.17×0.11λ. Simple configuration and wide bandwidth makes proposed patch antenna a suitable candidate for versatile communication applications.


BWR; DGS; BDR; UWB; EBIV; bandwidth ratio; defective ground structure; bandwidth dimension ratio; ultra-wide band; effective bandwidth of interest per unit volume

Full Text:



HU, J.; YANG, J. “The adaptabilities of different UWB technologies to the FCC UWB emission limit,” Proc. of Int. Conf. on Communication Software and Networks, ICCSN, Macau, China. IEEE, 2009, p.358-361. DOI:

FCC Online Table of Frequency Allocations. Accessed Feb. 2017. URI:

TANG, Hongyan; KE, Wang; WU, Runmiao; YU, Chao; ZHANG, Jian; WANG, Xiaotong. “A novel broadband circularly polarized monopole antenna based on C-shaped radiator,” IEEE Antennas Wireless Propag. Lett., v.16, p.964, 2017. DOI:

DING, Kang; GAO, Cheng; YU, Tongbin; QU, Dexin. “Broadband C-shaped circularly polarized monopole antenna,” IEEE Trans. Antennas Propag., v.63, n.2, p.785, 2015. DOI:

SAMSUZZAMAN, M.; ISLAM, Mohammad Tariqul. “A semicircular shaped super wideband patch antenna with high bandwidth dimension ratio,” Microwave Opt. Technol. Lett., v.57, n.2, p.445, 2015. DOI:

MAHMUD, M.Z.; ISLAM, M.T.; SAMSUZZAMAN, M. “A high performance UWB antenna design for microwave imaging system,” Microwave Opt. Technol. Lett., v.58, n.8, p.1824, 2016. DOI:

CHOE, Hyeonhyeong; LIM, Sungjoon. “Ultrawideband compact U-shaped antenna with inserted narrow strip and inverted T-shaped slot,” Microwave Opt. Technol. Lett., v.56, n.10, p.2265, 2014. DOI:

TRIPATHI, Shrivishal; MOHAN, A.; YADAV, Sandeep. “A multinotched octagonal shaped fractal UWB antenna,” Microwave Opt. Technol. Lett., v.56, n.11, p.2469, 2014. DOI:

SHAKIB, M.N.; MOGHAVVEMI, M.; MAHADI, W.N.L. “A low-profile patch antenna for ultrawideband application,” IEEE Antennas Wireless Propag. Lett., v.14, p.1790, 2015. DOI:

NEEBA, George; LETHAKUMARY, B. “A compact microstrip antenna for UWB applications,” Microwave Opt. Technol. Lett., v.57, n.3, p.621, 2015. DOI:

TAHIR, Farooq A.; NAQVI, Aqeel H. “A compact hut-shaped printed antenna for super-wideband applications,” Microwave Opt. Technol. Lett., v.57, n.11, p.2645, 2015. DOI:

GONG, Bing; REN, Xue Shi; ZENG, Ying Yin; SU, Lin Hua; ZHENG, Qiu Rong. “Compact slot antenna for ultra-wide band applications,” IET Microwaves, Antennas & Propag., v.8, n.3, p.200, 2014. DOI:

SHAKIB, Mohammed Nazmus; MOGHAVVEMI, Mahmoud; MAHADI, Wan Nor Liza. “Optimization of planar monopole wideband antenna for wireless communication system,” PloS one, v.11, n.12, 2016. DOI:

OJAROUDI, Nasser; OJAROUDI, Mohammad; GHADIMI, Noradin. “UWB omnidirectional square monopole antenna for use in circular cylindrical microwave imaging systems,” IEEE Antennas Wireless Propag. Lett., v.11, p.1350, 2012. DOI:

OJAROUDI, Nasser. “Compact UWB monopole antenna with enhanced bandwidth using rotated L-shaped slots and parasitic structures,” Microwave Opt. Technol. Lett., v.56, n.1, p.175, 2014. DOI:

SINGH, R.K.; PUJARA, Dhaval A. “A novel design of ultra-wideband quarter circular microstrip monopole antenna,” Microwave Opt. Technol. Lett., v.59, n.2, p.225, 2017. DOI:

KANJ, Houssam; POPOVIC, Milica. “Miniaturized microstrip-fed ‘Dark Eyes’ antenna for near-field microwave sensing,” IEEE Antennas Wireless Propag. Lett., v.4, p.397, 2005. DOI:

LIU, Jian. “Planar monopole notched ultra-wideband antenna with U-slot on metallic ground,” Proc. of Int. Conf. on Applications of Electromagnetism and Student Innovation Competition Awards, 11-13 Aug. 2010, Taipei, Taiwan. IEEE, 2010, p.244-248. DOI:

BORAH, J.; SHEIKH, T.A.; ROY, S. “Compact CPW-fed tri-band antenna with a defected ground structure for GSM, WLAN and WiMAX applications,” Radioelectron. Commun. Syst., v.59, n.7, p.319, 2016. DOI:

KUMAR, A.; SINGH, M.K. “Band-notched planar UWB microstrip antenna with T-shaped slot,” Radioelectron. Commun. Syst., v.61, n.8, p.371, 2018. DOI:

© Radioelectronics and Communications Systems, 2004–2019
When you copy an active link to the material is required
ISSN 1934-8061 (Online), ISSN 0735-2727 (Print)
tel./fax +38044 204-82-31, 204-90-41