Title :
Pattern-Reconfigurable Self-Oscillating Active Integrated Antenna With Frequency Agility
Author :
Cheng-Hsun Wu ; Tzyh-Ghuang Ma
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ. of Sci. & Technol., Taipei, Taiwan
Abstract :
A frequency-agile pattern-reconfigurable self-oscillating active integrated antenna (AIA) is investigated in this paper. With the aid of two PIN diodes and a varactor, the proposed active antenna shows pattern reconfigurability and frequency tunability at the same time. The antenna, composed of two monopoles and a semi-ring radiator, can be switched between four states, with two featuring omnidirectional patterns and the other two having end-fire radiation. The polarizations of the two omnidirectional states are spatially orthogonal to each other. By embedding a varactor diode, the voltage-controlled tuning range is from 4.27 to 4.94 GHz, while the effective isotropic radiated power (EIRP) varies from 5.4 to 9.3 dBm. The phase noise is better than -102.7 dBc/Hz at a 1-MHz offset from the carrier frequency.
Keywords :
antenna radiation patterns; microwave antennas; microwave field effect transistors; microwave oscillators; monopole antennas; p-i-n diodes; varactors; PIN diodes; effective isotropic radiated power; end-fire radiation; frequency 4.27 GHz to 4.94 GHz; frequency agility; microstrip antennas; microwave FET oscillators; monopole radiators; omnidirectional patterns; pattern-reconfigurable self-oscillating active integrated antenna; semi-ring radiator; varactor diode; voltage-controlled tuning range; Antenna radiation patterns; Gain; Phase noise; Resonant frequency; Varactors; Active antennas; microstrip antennas; microwave FET oscillators; monopole radiators; reconfigurable antennas;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2014.2361897
