engleski

Circular active integrated antenna with push-pull oscillator

New oscillating circular patch antenna with two bipolar transistors operating in push-pull mode is presented. By using a circular instead of a rectangular patch the stability of the operating frequency was increased. The push-pull oscillator was integrated inside the patch resulting in small dimensions. High radiated power and very linear frequency tuning were observed. Radiation patterns showed no degradation due to patch modifications.

active antennas; microstrip antennas; oscillators; power combining

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