how to increase bandwidth and beamwidth?

hi,

plz tell me some ideas to improve the beamwidth and to increase the bandwidth of cpw fed slot antennas?


bye from,

kbmani

A cpw fed double slot antenna can provide narrower beamwidth than a signle slot. Usually slot antenna are not designed for wide bandwidth. For wide bandwidth, spiral antenna or log periodic antenna are better choices.

hi,
i am also using double slot but getting 90 beamwidth. but i want to reduce still further. what to do?

thanks from,

kbmani

Dear THz, I am designing a two arm Archmedian spiral antenna. I am not getting good s11 results. My freq range is 2-18GHz. How do you think I can enhance its bandwidth and improve s11.
Thanks