A Planar Dualband Antenna for 2.4 GHz and UWB Laptop Applications

This paper presents a planar embedded dualband antenna for the 2.4 GHz wireless local area network (WLAN) and ultra-wideband (UWB) applications. A partial elliptic with a rectangle tail on the front side of a PCB forms the planar antenna for the UWB applications (3.1-10.6 GHz). The smooth change in the feed of the antenna achieves a good impedance match between the feed cable and the antenna. A strip on the back side of the PCB connected to the front side with a metal strip on the side or via through the PCB produces a resonance for the 2.4 GHz WLAN or Bluetooth (BT) application. The proposed antenna was simulated assuming free-space conditions, and fabricated onto a piece of a thin PCB. Both the impedance and radiation performance of the antenna embedded into the display of a laptop computer were experimentally measured and then optimized. The measurement shows that the proposed antenna is capable of providing a good impedance match and acceptable gain across the 2.4-2.5 GHz WLAN/BT band and the 3.1-10.6 GHz UWB band. Furthermore, this antenna features a low profile and low cost solution, and can be readily embedded into the thin covers of laptop computers or other portable devices

[1]  Duixian Liu,et al.  Developing integrated antenna subsystems for laptop computers , 2003, IBM J. Res. Dev..

[2]  Seong-Youp Suh,et al.  A new ultrawideband printed monopole antenna: the planar inverted cone antenna (PICA) , 2004, IEEE Transactions on Antennas and Propagation.

[3]  D. Liu,et al.  A new dual-band antenna for ISM application , 2002, Proceedings IEEE 56th Vehicular Technology Conference.

[4]  Kin-Lu Wong,et al.  Dual-band F-shaped monopole antenna for 2.4/5.2 GHz WLAN application , 2002, IEEE Antennas and Propagation Society International Symposium (IEEE Cat. No.02CH37313).

[5]  Duixian Liu,et al.  A multi-branch monopole antenna for dual-band cellular applications , 1999 .

[6]  F. De Flaviis,et al.  Triangular microstrip patch antennas for dual mode 802.11 a,b WLAN application , 2002, IEEE Antennas and Propagation Society International Symposium.

[7]  Zhi Ning Chen,et al.  Characteristics of planar dipoles printed on finite-size PCBs in UWB radio systems , 2004, IEEE Antennas and Propagation Society Symposium, 2004..

[8]  B. Gaucher,et al.  A branched inverted-F antenna for dual band WLAN applications , 2004, IEEE Antennas and Propagation Society Symposium, 2004..

[9]  B. Gaucher,et al.  A triband antenna for WLAN applications , 2003, IEEE Antennas and Propagation Society International Symposium. Digest. Held in conjunction with: USNC/CNC/URSI North American Radio Sci. Meeting (Cat. No.03CH37450).

[10]  Duixian Liu,et al.  Integrated laptop antennas - design and evaluation , 2002, IEEE Antennas and Propagation Society International Symposium (IEEE Cat. No.02CH37313).

[11]  B. Gaucher,et al.  Performance analysis of inverted-F and slot antennas for WLAN applications , 2003, IEEE Antennas and Propagation Society International Symposium. Digest. Held in conjunction with: USNC/CNC/URSI North American Radio Sci. Meeting (Cat. No.03CH37450).

[12]  Ning Yang,et al.  Planar Diamond Antenna in UWB Radio Systems , 2002 .