Folded Strip/Slot Antenna With Extended Bandwidth for WLAN Application

Yuandan Dong, Jun Choi, Tatsuo Itoh

Research output: Contribution to journalArticlepeer-review

42 Scopus citations


A compact and novel printed antenna for 2.4-GHz WLAN/Zigbee/Bluetooth applications is proposed in this letter. To extend the bandwidth, a strip mode and a slot mode are combined together, which generate a dual-mode response inside the radiating band. To miniaturize the overall size, the structure is folded in order to fully utilize the available antenna space. The antenna is fabricated on a 1-mm FR4 board and excited by an SMA connector using a short microstrip line. It achieves a -10-dB bandwidth of 5.09% with a compact size of 0.073 λ0 × 0.052 λ0 × 0.008 λ0 (9.2 × 6.5 × 1 mm3) and an in-band radiation efficiency above 73%. It is small and low-profile, which can be fabricated at a low cost using the standard printed circuit board (PCB) process. It shows good radiation performance and therefore is suitable for applications in Internet of Things and smart home devices.

Original languageEnglish (US)
Article number7533470
Pages (from-to)673-676
Number of pages4
JournalIEEE Antennas and Wireless Propagation Letters
StatePublished - 2017


  • Folded antenna
  • WLAN antenna
  • Zigbee antenna
  • miniaturized antenna
  • printed antenna
  • slot/strip dual mode

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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