A Compact Uniplanar Printed Dual-Antenna Operating at the 2.4/5.2/5.8 GHz WLAN Bands for Laptop Computers

• Published in: IEEE antennas and wireless propagation letters 2014, Vol.13, p.229-232
• Main Authors: Guo, Lin, Wang, Yan, Du, Zhengwei, Gao, Yougang, Shi, Dan
• Format: Article
• Language: English
• Subjects: Antenna measurements; Antennas; Bands; Coupled-fed; dual-band decoupling; Gain; Grounds; Laptop computers; Local area networks; loop antenna; Loop antennas; multiantenna; Mutual coupling; Portable computers; Printed circuit boards; protruded ground; T-shaped slot; Wireless LAN; Wireless networks
• ISSN: 1536-1225; 1548-5757
• DOI: 10.1109/LAWP.2014.2303495

A compact uniplanar printed dual-antenna for laptop computers is proposed. The dual-antenna, consisting of two symmetric antenna elements and a protruded ground with an embedded T-shaped slot, is printed on a single-layer printed circuit board with a size of only 9 × 40 mm 2 . The antenna element is a coupled-fed loop antenna with a size of only 9 × 7 mm 2 . The protruded ground with the embedded T-shaped slot reduces the mutual coupling within two frequency bands. The working mechanism is analyzed in detail for deep understanding. A prototype shows that the measured -10-dB impedance bandwidths are 190 MHz (2.38-2.57 GHz)/1.82 GHz (4.34-6.16 GHz), and the measured mutual couplings are lower than -18/ -20 dB at the 2.4- and 5.2/5.8-GHz WLAN bands, respectively. The measured gains and efficiencies are better than 4.1/4.1 dBi and 65%/54% at the 2.4- and 5.2/5.8-GHz WLAN bands, respectively.