Journal
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
Volume 63, Issue 7, Pages 3267-3271Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAP.2015.2423699
Keywords
Dual-band antenna; frequency tunable; reconfigurable antenna; slot antenna
Funding
- National Science Foundation [ECS-0925929, CMMI-1053956]
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Mechanically reconfigurable dual-band slot dipole antennas with wide tuning ranges are developed in this communication. The dual-band operation is achieved by inserting parallel slots with different lengths and the tuning is realized by incorporating a dual rack and pinion mechanism to slide parasitic patches to vary the slot lengths and the frequency of operation of each band. To demonstrate the proposed approach, two frequency-tunable antennas are prototyped. The first design uses two motors to tune the frequency band ratio between 1 and 2.6. The second design uses one motor to maintain a constant frequency band ratio of 2 over the tuning range of 2-3 GHz for the lower band and 4-6 GHz for the upper band. Both designs show minimal variation in gain, polarization, and radiation pattern over the tuning range.
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