Cps-Fed Printed Pentagonal-Loop Antenna With High Gain And Broad Beam

A CPS-fed printed pentagonal-loop antenna with high gain, and broad beam is proposed. This antenna has not only the high gain of 11.7 dB. but also the low cross-polarization level less than -44 dB. Furthermore, the broad beam width with more than 60 degrees HPBW (Half Power Beam Width) in the E plane is able to avoid the demand of precise main beam alignment. With these advantages. it can be used in the low power density applications of rectenna systems and radio frequency front-ends. For measuring, a balun from the CPS to the microstrip line is designed. The measured results are in agreement with the simulated ones. (C) 2009 Wiley Periodicals. Inc. Microwave Opt Technol Lett 51: 1188-1191, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24292