Reconfigurable Circularly-Polarized Patch Antenna With Conical Beam
- 18 May 2010
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Antennas and Propagation
- Vol. 58 (8), 2753-2757
- https://doi.org/10.1109/tap.2010.2050436
Abstract
A design method is described for reconfigurable circularly-polarized (CP) microstrip array antennas with conical-beam radiation. The proposed antenna structure consists of four L-shaped patch antennas arranged in a square-ring formation. Each patch antenna is shorted to the ground plane through conducting walls. With a top-loaded monopole feed, two orthogonal resonant modes, loop mode and monopole mode, can be excited simultaneously. The effects of the shorting walls on the resonant frequencies of the two modes are investigated, and it is found that the resonant frequency (fmono) of the monopole mode has a more obvious variation than that (floop) of the loop mode when the width or the number of the shorting walls is changed. In addition, if the two modes are properly coupled, the microstrip array can generate a CP radiation; meanwhile, the polarization sense is left-hand CP if floop > fmono but is right-hand CP if floop <; fmono. A reconfigurable antenna prototype is fabricated, and the experimental results show that the prototype not only has the characteristic of omnidirectional radiation but also possesses the ability of switching between left-hand and right-hand CP. Simulated results carried out by HFSS are also provided and they agree well with the measured results.Keywords
This publication has 16 references indexed in Scilit:
- Reconfigurable Square-Ring Patch Antenna With Pattern DiversityIEEE Transactions on Antennas and Propagation, 2007
- A reconfigurable microstrip antenna for switchable polarizationIEEE Microwave and Wireless Components Letters, 2004
- A new design of horizontally polarized and dual-polarized uniplanar conical beam antennas for HIPERLANIEEE Transactions on Antennas and Propagation, 2003
- Omnidirectional circularly-polarized conformal microstrip array for telemetry applicationsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- A broadband low-profile cylindrical monopole antenna top loaded with a shorted cross patchMicrowave and Optical Technology Letters, 2001
- A low-profile conical beam loop antenna with an electromagnetically coupled feed systemIEEE Transactions on Antennas and Propagation, 2000
- Circularly polarised printed antenna with conical beamElectronics Letters, 1998
- Circularly polarised conical beam radial line slot antennaElectronics Letters, 1994
- New kind of microstrip antenna: the monopolar wire-patch antennaElectronics Letters, 1994
- Singly-fed patch antenna radiating a circularly polarised conical beamElectronics Letters, 1990