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IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 55, NO. 4, APRIL 2007 1193 Frequency Tunable Microstrip Patch Antenna Using RF
 

Summary: IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 55, NO. 4, APRIL 2007 1193
Frequency Tunable Microstrip Patch Antenna Using RF
MEMS Technology
Emre Erdil, Kagan Topalli, Mehmet Unlu, Ozlem Aydin Civi, and
Tayfun Akin
Abstract--A novel reconfigurable microstrip patch antenna is presented
that is monolithically integrated with RF microelectromechanical systems
(MEMS) capacitors for tuning the resonant frequency. Reconfigurability
of the operating frequency of the microstrip patch antenna is achieved by
loading it with a coplanar waveguide (CPW) stub on which variable MEMS
capacitors are placed periodically. MEMS capacitors are implemented with
surface micromachining technology, where a 1- mthick aluminum struc-
tural layer is placed on a glass substrate with a capacitive gap of 1.5 m.
MEMS capacitors are electrostatically actuated with a low tuning voltage
in the range of 011.9 V. The antenna resonant frequency can continuously
be shifted from 16.05 GHz down to 15.75 GHz as the actuation voltage is
increased from 0 to 11.9 V. These measurement results are in good agree-
ment with the simulation results obtained with Ansoft HFSS. The radiation
pattern is not affected from the bias voltage. This is the first monolithic fre-
quency tunable microstrip patch antenna where a CPW stub loaded with

  

Source: Akin, Tayfun - Department of Electrical and Electronics Engineering, Middle East Technical University

 

Collections: Engineering