A frequency-tunable dual-band multi-ring microstrip antenna fed by an L-probe with varactor diodes
Authors:
- 1 July 2017
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- p. 1363-1364
Abstract
This paper presents a frequency-tunable multi-ring microstrip antenna (MR-MSA) fed by an L-probe with varactor diodes. In order to realize a frequency-tunable multiband microstrip antenna, multiple ring patches are arranged concentrically and two varactor diodes are mounted on each ring patch. An L-shaped feeding probe is used to excite the ring patches. Resonant frequencies of the proposed antenna can be controlled by the DC bias voltage applied to the varactor diodes. In order to demonstrate the basic operation of the proposed frequency-tunable multiband microstrip antenna, a dual-band MR-MSA composed of two ring patches are designed and tested. The fractional bandwidth of the frequency-tunable range of the test MR-MSA is measured to be around 10% under the condition of 1 dB gain reduction from the maximum and of the reflection less than -10 dB. The antenna configuration can be easily extended to multiband operation more than dual-band by arranging more ring patches.Keywords
This publication has 6 references indexed in Scilit:
- A frequency tunable ring microstrip antenna fed by an L-probe with varactor diodes2015
- Circularly polarized microstrip antennas for frequency control with a variable reactance2011
- A frequency agile microstrip antenna2005
- Discrete multiloop, modified multiloop, and plate-loop antennas-multifrequency and wideband VSWR characteristicsIEEE Transactions on Antennas and Propagation, 2002
- L-probe proximity fed U-slot patch antennaElectronics Letters, 1998
- Independent control of resonantfrequency and input impedanceof a microstrip patch byindividually biased varactor diodesElectronics Letters, 1996