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Titolo: A distributedfeedback antenna oscillator
Autore: Wang, SL; Chou, YH; Chung, SJ;
 Indirizzi:
 Natl Chiao Tung Univ, Dept Commun Engn, Hsinchu 300, Taiwan Natl Chiao Tung Univ Hsinchu Taiwan 300 Commun Engn, Hsinchu 300, Taiwan
 Titolo Testata:
 IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
fascicolo: 5,
volume: 48,
anno: 2000,
pagine: 857  860
 SICI:
 00189480(200005)48:5<857:ADAO>2.0.ZU;24
 Fonte:
 ISI
 Lingua:
 ENG
 Soggetto:
 ARRAY;
 Keywords:
 active antenna; feedback; oscillator; spatial power combining;
 Tipo documento:
 Article
 Natura:
 Periodico
 Settore Disciplinare:
 Engineering, Computing & Technology
 Citazioni:
 10
 Recensione:
 Indirizzi per estratti:
 Indirizzo: Wang, SL Natl Chiao Tung Univ, Dept Commun Engn, Hsinchu 300, Taiwan Natl Chiao Tung Univ Hsinchu Taiwan 300 gn, Hsinchu 300, Taiwan



 Citazione:
 S.L. Wang et al., "A distributedfeedback antenna oscillator", IEEE MICR T, 48(5), 2000, pp. 857860
Abstract
In this paper, a new design of the active transmitting antenna array, called the distributedfeedback antenna oscillator, is proposed. The active array is formed by serially connecting several unit cells to a closed loop. Each unit cell contains an amplifier and a twoport antenna, with an overall insertion gain larger than 0 dB and a phase delay equal to a multiple of 360 degrees. The signal traveling on the loop is amplified and radiated in each unit cell. The radiation fields from all the antennas are then combined in free space. A fourelement feedback antenna oscillator operating at 10 GHz is demonstrated by using twoport aperturecoupled microstrip antennas. Simulation results show that multiple oscillation modes with different frequencies and different radiation beams may be excited in the antenna oscillator. By experiment, it is found that each oscillation mode can be built by tuning the biases of the oscillator. The measured radiation pattern for each mode agrees very well with the predicted one. For a singlemode operationwith a broadside pattern, bandstop filters of a simple geometry are designed and embedded in the oscillator to suppress the unwanted oscillation modes. Finally, the influence of the bias condition on the radiation power of the singlemode oscillator is investigated.
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Documento generato il 26/01/20 alle ore 16:15:37