Slot dipole antenna with single- and dual-band tuning characteristic

• Published in: Electronics letters Vol. 50; no. 21; pp. 1506 - 1507
• Main Authors: Idris, I.H, Hamid, M.R, Jamaluddin, M.H, Rahim, M.K.A, Kelly, J
• Format: Journal Article
• Language: English
• Published: Stevenage The Institution of Engineering and Technology 09.10.2014; John Wiley & Sons, Inc
• Subjects: Antennas; Antennas and propagation; Bands; base station; Cognitive radio; cognitive radio application; Dipole antennas; dual‐band tuning characteristics; frequency 1.5 GHz to 4.5 GHz; microwave antennas; reconfigurable operating frequency; single‐band tuning characteristics; slot antennas; slot arms; slot dipole antenna; Terminals; Tuning; UHF antennas; Varactor diodes; varactors; Voltage; reconfigurable operating frequency; tuning; microwave antennas; frequency 1.5 GHz to 4.5 GHz; slot arms; slot dipole antenna; cognitive radio application; dipole antennas; single-band tuning characteristics; slot antennas; cognitive radio; varactors; UHF antennas; varactor diodes; base station; dual-band tuning characteristics
• ISSN: 0013-5194; 1350-911X; 1350-911X
• DOI: 10.1049/el.2014.1271

A slot dipole antenna with a reconfigurable operating frequency is presented. The antenna comprises two pairs of slot arms. Each arm incorporates a number of varactor diodes. The antenna is capable of operating in single-band or dual-band mode. In each case, the location of these bands can be altered by varying the voltage applied to the varactor diodes. The antenna can be tuned over a wide frequency range, namely 1.5–4.5 GHz (i.e. a ratio of 3:1). The antenna is potentially useful for cognitive radio application, particularly in a small base station or access point terminal.