Compact circular connected monopole antenna arrays for wideband MIMO applications

Muhammad Ikram, Mohammad S. Sharawi*, Atif Shamim

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


In this work, a connected circular monopole antenna array is presented for ultra-compact, wideband, multiple-input multiple-output (MIMO) wireless access point applications. Two configurations of the circular array are considered; one with 4- and another with 8-antenna elements using the same substrate size. The frequency bands covered were from 2.3 to 5.3 GHz (LTE 2.3-3.8 GHz, Bluetooth 2.4 GHz, wireless local area network 2.4, 5.2 GHz and WiMax 2.3 GHz). The obtained measured bandwidth was 3 and 2 GHz for the 4- and 8-element arrays, respectively. The antenna system is fabricated on a commercially available Roger 4350 substrate with εr equal to 3.5 and height of 1.52 mm. The radius of the array is 32 mm (the most compact with wideband characteristics). The length of a single element is only 15 mm which is λ/8 at the lowest frequency. The design is planar, low profile and very compact. Good MIMO performance is achieved.

Original languageEnglish (US)
Pages (from-to)2122-2127
Number of pages6
JournalIET Microwaves, Antennas and Propagation
Issue number13
StatePublished - Oct 31 2018

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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