Design of frequency-agile microstrip antennas with conical-beam radiation

Jia Fu Tsai, Jeen Sheen Row

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


A microstrip antenna with frequency agility is described in this article.The antenna has a circular radiating patch and operates at its TM 01 mode to generate omnidirectional radiation across the azimuthal plane. To change the resonant frequency, a capacitor is introduced and connected to the antenna input port in series. With the increasing of capacitance, the resonant frequency is decreased while the resonant resistance and radiation characteristic nearly remain constant. Experimental results indicate that the design can provide a frequency tunable range of 22%; moreover, good impedance matching and stable radiation pattern are also obtained in the range.

Original languageEnglish
Pages (from-to)783-785
Number of pages3
JournalMicrowave and Optical Technology Letters
Issue number4
Publication statusPublished - 2011 Apr 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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