Slot-antenna with switchable polarization

Author

Fries, Matthias K. ; Gräni, Mischa ; Vahldieck, Rädiger

Author_Institution

Lab. for Electromagn. Fields & Microwave Electron., Swiss Fed. Inst. of Technol., Zurich, Switzerland

Volume

2

fYear

2002

fDate

2002

Firstpage

440

Abstract

Antennas in modern wireless communication systems are required to operate with different polarizations in order to adapt the system to various transmission environments. A novel PIN-diode switched planar slot-loop antenna is introduced which allows switching between linear and circular polarization with a single antenna element. A further advantage of this solution is its uniplanar structure which makes it easy to implement PIN-diodes. The antenna is designed for the 2.45 GHz range and achieves excellent performance with both types of polarization at the same frequency. Simulation and experimental results are shown for a uniplanar antenna with polarization switched between RHCP and LHCP and between circular and linear polarization. The EM simulation of the structure is done with ENSEMBLE from Ansoft. The non-ideal characteristics of the diodes are taken into account in the simulation.

Keywords

UHF antennas; antenna radiation patterns; electromagnetic wave polarisation; loop antennas; microstrip antennas; p-i-n diodes; slot antennas; 2.45 GHz; Ansoft ENSEMBLE; PIN-diode; circular polarization; linear polarization; loop antenna; planar antenna; printed antenna; radiation pattern; slot-antenna; switchable polarization; uniplanar antenna; Circuits; Communication switching; Diodes; Frequency; Joining processes; Patch antennas; Polarization; Slot antennas; Slotline; Switches;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 2002. IEEE

Print_ISBN

0-7803-7330-8

Type

conf

DOI

10.1109/APS.2002.1016117

Filename

1016117