NCJ Number
249137
Journal
IEEE Transactions on Antennas and Propagation Volume: 58 Issue: 3 Dated: March 2010 Pages: 626-632
Date Published
March 2010
Length
7 pages
Annotation
This paper reports on the development and features of a frequency reconfigurable (flow=2.4 GHz and fhigh=5.2 GHz) annular slot antenna.
Abstract
The reconfigurability is achieved through single-arm and double-arm DC-contact microelectromechanical (MEMS) actuators, which are strategically located within the antenna geometry and the microstrip feed line. Simulations and measurements demonstrated that the antenna has similar gain (~ 2 dB) and well-behaved radiation patterns at both frequency bands, which is a required antenna feature for multi-mode, multi-band mobile wireless communication applications. The average value of S21 (~ -0.2 dB in the switch down-state) indicates that the switch contact resistance is ~ 2 omega. Also, the effect of SiCr bias circuitry on the radiation and impedance characteristics is negligible. 11 figures and 24 references