Tri-band rectangle-loaded monopole antenna with inverted-L slot for WLAN/WiMAX applications

• Published in: Electronics letters Vol. 49; no. 20; pp. 1261 - 1262
• Main Authors: Chen, H, Yang, X, Yin, Y.-Z, Wu, J.-J, Cai, Y.-M
• Format: Journal Article
• Language: English
• Published: Stevenage The Institution of Engineering and Technology 26.09.2013; Institution of Engineering and Technology
• Subjects: antenna radiation patterns; Antennas; Antennas and propagation; Applied sciences; bandwidth 360 MHz; bandwidth 470 MHz; bandwidth 890 MHz; Circuit properties; coplanar waveguide components; coplanar waveguide‐fed tri‐band monopole antenna; dipole‐like radiation pattern; Electric, optical and optoelectronic circuits; Electronics; Exact sciences and technology; frequency 2.38 GHz to 2.85 GHz; frequency 3.36 GHz to 3.72 GHz; frequency 4.98 GHz to 5.87 GHz; inverted‐L slot; microwave access; Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits; monopole antennas; multifrequency antennas; Radiocommunications; rectangular tuning patch; slot antennas; Telecommunications; Telecommunications and information theory; tri‐band rectangle‐loaded monopole antenna; WiMax; wireless LAN; wireless local area network; WLAN; worldwide interoperability; monopole antennas; bandwidth 470 MHz; coplanar waveguide components; WiMax; WLAN; worldwide interoperability; rectangular tuning patch; wireless local area network; slot antennas; coplanar waveguide-fed tri-band monopole antenna; antenna radiation patterns; microwave access; inverted-L slot; tri-band rectangle-loaded monopole antenna; frequency 3.36 GHz to 3.72 GHz; multifrequency antennas; dipole-like radiation pattern; frequency 4.98 GHz to 5.87 GHz; wireless LAN; frequency 2.38 GHz to 2.85 GHz; bandwidth 360 MHz; bandwidth 890 MHz; Wireless LAN; Wide band; Slot antenna; Microwave antenna; Monopole antenna; Microwave circuit; Inversion; Wireless network; Coplanar line; Chemical etching; Multiple frequency; High rate transmission
• ISSN: 0013-5194; 1350-911X; 1350-911X
• DOI: 10.1049/el.2013.2329

A novel coplanar waveguide-fed tri-band monopole antenna with a compact radiator (10 × 23 mm2) for WLAN/WiMAX applications is presented. By etching properly an inverted-L slot on the straight strip loaded with a rectangular tuning patch and further adjusting the dimensions and positions of these structures, three distinct wide bands can be achieved. The measured and simulated results show that the proposed antenna has 10 dB impedance bandwidth of 470 MHz (2.38–2.85 GHz), 360 MHz (3.36–3.72 GHz) and 890 MHz (4.98–5.87 GHz) to cover all the 2.4/5.2/5.8 GHz WLAN bands and 2.5/3.5/5.5 GHz WiMAX bands. Also, the proposed antenna produces good dipole-like radiation pattern over the covering bands.