Phased array behavior of unilaterally coupled active antennas with varactor diodes

Minoru Sanagi, Tomomichi Kagawa, Shigeji Nogi

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A phased array behavior of a unilaterally coupled active antennas has been investigated. The active antenna is composed of a patch antenna and a parallel feedback type oscillator which can be coupled unilaterally to other oscillators without other nonreciprocal components. Numerical calculations of the reduced equations describing the behavior of the coupled oscillators array demonstrated that the phase differences between the oscillators can be varied up to about π/2 by giving the frequency changes from the injection locking frequency to the oscillators except of the first one. The oscillator mounted with the varactor diode for wide tuning range exhibited the property suitable for constructing the unilaterally coupled array. In the experiments at X-band, the electromagnetic wave radiated from the five element array was successfully scanned.

Original languageEnglish
Pages (from-to)192-198
Number of pages7
JournalIEICE Transactions on Electronics
VolumeE-86-C
Issue number2
Publication statusPublished - Feb 2003

Fingerprint

Antenna phased arrays
Varactors
Diodes
Antennas
Microstrip antennas
Electromagnetic waves
Tuning
Feedback
Experiments

Keywords

  • Active antenna
  • Injection locking
  • Microwave
  • Phased array

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Phased array behavior of unilaterally coupled active antennas with varactor diodes. / Sanagi, Minoru; Kagawa, Tomomichi; Nogi, Shigeji.

In: IEICE Transactions on Electronics, Vol. E-86-C, No. 2, 02.2003, p. 192-198.

Research output: Contribution to journalArticle

Sanagi, Minoru ; Kagawa, Tomomichi ; Nogi, Shigeji. / Phased array behavior of unilaterally coupled active antennas with varactor diodes. In: IEICE Transactions on Electronics. 2003 ; Vol. E-86-C, No. 2. pp. 192-198.
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