A varactor-tuned active-integrated antenna using slot antenna

Author

Choi, Dong-Hyuk ; Park, Seong-Ook

Author_Institution

Sch. of Eng., Inf. & Commun. Univ., Daejeon, South Korea

Volume

4

fYear

2005

fDate

6/27/1905 12:00:00 AM

Firstpage

191

Lastpage

193

Abstract

A varactor-tuned active antenna which consists of a series feedback voltage-controlled oscillator (VCO) and a well matched slot antenna is proposed. The fabricated antenna shows stable oscillation at 5.8 GHz band, and the frequency varied from 5.73 to 5.97 GHz, with less than 1.28 dB of amplitude deviation over the frequency range. Since the fabricated active antenna is a simple structure where the operating frequency can be easily tuned through the varactor diode, it may be used as an element in phase-shifterless beam scanning systems. In addition, a capacitor for dc blocking is not necessary due to isolation between the active and radiating element.

Keywords

active antennas; microstrip antennas; slot antennas; varactors; voltage-controlled oscillators; 5.73 to 5.97 GHz; capacitor; dc blocking; microstrip antenna; phase-shifterless beam scanning system; series feedback voltage-controlled oscillator; slot antenna; varactor diode; varactor-tuned active-integrated antenna; Adaptive arrays; Antenna feeds; Capacitors; Diodes; Frequency; Microstrip antennas; Receiving antennas; Slot antennas; Varactors; Voltage-controlled oscillators; Microstrip; slot antenna; varactor-tuned active antenna;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2005.850799

Filename

1435363