How to increase bandwidth in dual-band antenna??
How to increase bandwidth in dual-band antenna??
(OP)
Hi all,
I design dual-band microstrip antenna using the formula of Freq=light speed / 4( length+width) for both lower and higher operating freq. There is a U-shaped slot on the radiating element........
However, it seems that the higher freq one always has a narrower bandwidth.......narrower than the lower freq one. So I want to find out what method can do improvement on its bandwidth for the higher operating freq?????
I design dual-band microstrip antenna using the formula of Freq=light speed / 4( length+width) for both lower and higher operating freq. There is a U-shaped slot on the radiating element........
However, it seems that the higher freq one always has a narrower bandwidth.......narrower than the lower freq one. So I want to find out what method can do improvement on its bandwidth for the higher operating freq?????





RE: How to increase bandwidth in dual-band antenna??
http://www.eng-tips.com/viewthread.cfm?spid=247&newpid=247&sqid=48092&tmac=logc
http://www.ece.queensu.ca/hpages/faculty/freundorfer/V5/wireless/antennae/aper_coup_ant_1.html
http://www.cwc.nus.edu.sg/~chenzn/MOTL-0802.pdf
etc. for more info. The physical design needs to be finetuned. There may be cross-polarization, etc.
RE: How to increase bandwidth in dual-band antenna??