Frequency-Reconfigurable Self-Oscillating Active Antenna With Gap-loaded Ring Radiator

We investigate a new topology for realizing a compact frequency-reconfigurable self-oscillating active integrated antenna. The new design consists of a passive ring radiator, an unstable transistor, and two p-i-n diodes. Two gaps are etched across the radiator, with the diodes bridging the gaps to s...

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Bibliographic Details
Published inIEEE antennas and wireless propagation letters Vol. 12; pp. 337 - 340
Main Authors Lin, Ya-Yun, Ma, Tzyh-Ghuang
Format Journal Article
LanguageEnglish
Published New York IEEE 2013
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Active antennas
Antenna measurements
Antennas
Diodes
Drains
Gain
Gaps
microstrip antennas
microwave FET oscillators
Oscillations
Oscillators
Radiators
Radio frequency
reconfigurable antennas
Terminals
Topology
Transistors
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Summary:We investigate a new topology for realizing a compact frequency-reconfigurable self-oscillating active integrated antenna. The new design consists of a passive ring radiator, an unstable transistor, and two p-i-n diodes. Two gaps are etched across the radiator, with the diodes bridging the gaps to switch the antenna topology. By properly selecting the location of the gap with respect to the gate/drain terminals, the oscillation can be stabilized at two distinct frequencies, each associated with a resonance mode of the ring radiator. The simulated methods and experimental results are introduced in this letter, along with the discussion of design principles and considerations.
Bibliography:ObjectType-Article-1
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ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2013.2250475