Compact monopole antenna design for WLAN/UWB applications

Wen Tsan Chung, Ching Her Lee, Chow Yen Desmond Sim

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


This article presents a compact microstrip-fed monopole antenna for application in WLAN (2.4-2.484 GHz) and UWB (3.1-10.6 GHz) bands. The radiating element of the proposed antenna consists of two arms that resonate at the fundamental frequencies of 2.45 and 3.5 GHz. A narrow slot is purposely embedded in the ground plane under the microstrip feed line to improve the impedance matching for the higher-order modes of the two radiating arms for achieving an ultra-wide-band response. A prototype of the designed antenna is fabricated and measured, and satisfactory radiation properties were observed. The measured 10-dB return-loss bandwidth (maximum peak gain) of the 2.4-GHz WLAN band is 0.17 GHz (4 dB), and that of the UWB band is 7.65 GHz (8.7 dB). In addition, a small group-delay variation of less than 1 ns was observed in the UWB.

Original languageEnglish
Pages (from-to)2874-2878
Number of pages5
JournalMicrowave and Optical Technology Letters
Issue number12
Publication statusPublished - 2009 Dec 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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