A Helix Excited Circularly Polarized Hollow Cylindrical Dielectric Resonator Antenna
- 12 April 2013
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Antennas and Wireless Propagation Letters
- Vol. 12 (15361225) , 535-538
Abstract
In this letter, we use a helix to excite two orthogonal HE11δ modes in phase quadrature in a hollow cylindrical dielectric resonator antenna to generate circular polarization. As compared to our previous work, it is shown that replacing the cylindrical dielectric resonator antenna with a hollow cylindrical-shaped one leads to a significant enhancement in the 3-dB axial-ratio bandwidth. A design guideline is provided, and three design cases are presented. A prototype for one of the designs is fabricated and measured. Measured and simulated data are presented and discussed. It is shown that the 3-dB axial-ratio bandwidth increases as the wall thickness of the hollow cylindrical dielectric resonator decreases. Furthermore, a reduction in the wall thickness requires a longer helix exciter for similar performance .Keywords
This publication has 11 references indexed in Scilit:
- A Circularly Polarized Cylindrical Dielectric Resonator Antenna Using a Helical ExciterIEEE Transactions on Antennas and Propagation, 2012
- Measurements and Analysis of a Helical Antenna Printed on a Layered Dielectric HemisphereIEEE Transactions on Antennas and Propagation, 2011
- External-Excitation Curl AntennaIEEE Transactions on Antennas and Propagation, 2011
- Wideband Circularly Polarized Trapezoidal Dielectric Resonator AntennaIEEE Antennas and Wireless Propagation Letters, 2010
- Circularly Polarized Dielectric Resonator Antenna Excited by a Shorted Annular Slot With a Backing CavityIEEE Transactions on Antennas and Propagation, 2004
- Frequency-adjustable circularly polarised dielectric resonator antenna with slotted ground planeElectronics Letters, 2003
- Theory and experiment of circularly polarized dielectric resonator antenna with a parasitic patchIEEE Transactions on Antennas and Propagation, 2003
- An elliptic dielectric resonator antenna designed for circular polarization with single feedMicrowave and Optical Technology Letters, 2003
- Circularly polarised rectangular dielectricresonator antennaElectronics Letters, 1995
- Dielectric resonator antennas—a review and general design relations for resonant frequency and bandwidthInternational Journal of Microwave and Millimeter-Wave Computer-Aided Engineering, 1994