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Titolo:
A three-port 180-degree antenna hybrid: Design and applications
Autore:
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:
IEICE TRANSACTIONS ON COMMUNICATIONS
fascicolo: 9, volume: E84B, anno: 2001,
pagine: 2443 - 2450
SICI:
0916-8516(200109)E84B:9<2443:AT1AHD>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
MICROSTRIP;
Keywords:
Wilkinson power divider; antenna hybrid; balanced mixer; active transmitting antenna; dual-radiation-mode antenna array;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
14
Recensione:
Indirizzi per estratti:
Indirizzo: Chou, YH Natl Chiao Tung Univ, Dept Commun Engn, 1001 Ta Hsueh Rd, Hsinchu300, Taiwan Natl Chiao Tung Univ 1001 Ta Hsueh Rd Hsinchu Taiwan 300 Taiwan
Citazione:
Y.H. Chou e S.J. Chung, "A three-port 180-degree antenna hybrid: Design and applications", IEICE TR CO, E84B(9), 2001, pp. 2443-2450

Abstract

In this paper, a novel three-port antenna structure, named 180 degrees antenna hybrid, is proposed and demonstrated. This structure is composed of a Wilkinson power divider with the isolation resistor replaced by an aperture-coupled patch antenna. The equivalent series impedance of the antenna can be adjusted to the required one by properly choosing the dimensions of the patch and the coupling aperture. When a signal is fed to the balanced port of this antenna hybrid, the power is equally split, with equal phases, to the two unbalanced ports. No power is radiated out from the antenna. In the other hand, a signal received from the antenna will be split with equal power but 180 phase difference to the two unbalanced ports. The balanced port is an isolation port. The measurement results showed good agreement with the characteristics to be designed. Three applications of this 180 degrees antenna hybrid are introduced, that is, a balanced mixer, an active transmitting antenna, and a dual-radiation-mode antenna array. The balanced mixer was constructed with diodes directly mounted on the two unbalanced ports of the antenna hybrid. The LO signal is fed from the balanced port and RF signal is received from the antenna. The active transmitting antenna was implemented with feedback configuration. The route from one of the unbalanced portto the balanced port of the antenna hybrid was used as the feedback path. A locking signal may be injected from the other unbalanced port. Finally, through a three-quarter-wavelength microstrip line, the balanced port of theantenna hybrid was connected to another aperture-coupled patch antenna to form a dual-radiation-mode antenna array. The in-phase and out-of-phase radiation patterns of this two-element array can be obtained from two unbalanced ports of the antenna hybrid, respectively.

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Documento generato il 28/01/20 alle ore 20:54:17