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Titolo:
A distributed-feedback 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:
0018-9480(200005)48:5<857:ADAO>2.0.ZU;2-4
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 distributed-feedback antenna oscillator", IEEE MICR T, 48(5), 2000, pp. 857-860

Abstract

In this paper, a new design of the active transmitting antenna array, called the distributed-feedback 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 two-port 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 four-element feedback antenna oscillator operating at 10 GHz is demonstrated by using two-port aperture-coupled 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 single-mode 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 single-mode oscillator is investigated.

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Documento generato il 26/01/20 alle ore 16:15:37