A 2.45-GHz Electrically Small Slot Antenna

A 2.45-GHz electrically small slot antenna (lambda0/35timeslambda0/35, 3.5times3.5 mm2) is disclosed. Miniaturization is achieved through symmetric inductive loading of an electrically small slot section. It is fabricated on a low-loss fused silica wafer through a back-etch of a 5000-Aring golden metal film, which is 31.5% of the skin depth at 2.45 GHz. The measured bandwidth is 106 MHz and the measured gain is -15 dBi. The theoretical Wheeler-Chu-McLean limit for the gain of a lambda0/35timeslambda0/35 electrically small antenna with a similar Q factor is -9.6 dBi.

[1]  R. Hansen,et al.  Fundamental limitations in antennas , 1981, Proceedings of the IEEE.

[2]  L.M. Feldner,et al.  Electrically Small Frequency-Agile PIFA-as-a-Package for Portable Wireless Devices , 2007, IEEE Transactions on Antennas and Propagation.

[3]  S..  A Re-Examination of the Fundamental Limits on the Radiation Q of Electrically Small Antennas , 2008 .

[4]  Kamal Sarabandi,et al.  A novel approach for miniaturization of slot antennas , 2003 .

[5]  A. Sugavanam,et al.  On-chip antennas in silicon ICs and their application , 2005, IEEE Transactions on Electron Devices.

[6]  K. Sarabandi,et al.  A 2–40 GHz Probe Station Based Setup for On-Wafer Antenna Measurements , 2008, IEEE Transactions on Antennas and Propagation.

[7]  K.M.K.H. Leong,et al.  Composite Right/Left-Handed Metamaterial Antennas , 2006, IEEE International Workshop on Antenna Technology Small Antennas and Novel Metamaterials, 2006..

[8]  Antonio Faraone,et al.  Multiband internal antenna for mobile phones , 2005 .

[9]  P. Vainikainen,et al.  Resonator-based analysis of the combination of mobile handset antenna and chassis , 2002 .

[10]  S. Best,et al.  Impedance, bandwidth, and Q of antennas , 2005 .

[11]  Daniel C. Edelstein,et al.  Spiral inductors and transmission lines in silicon technology using copper-damascene interconnects and low-loss substrates , 1997 .

[12]  S.R. Best.  A discussion on the quality factor of impedance matched electrically small wire antennas , 2005, IEEE Transactions on Antennas and Propagation.