multi-band compact phone antenna

How to design multi-ban handset antennas?

its works bands includes: GSM850,GSM900,DCS1800,PCS1900 Quad-GSM band and 2010-2015MHz bnad.

Research good suggestion!

Thanks and Best Regards!

Joanhuo

try this.
INTERNAL DUAL-BAND PATCH ANTENNA FOR MOBILE PHONES
https://www.edaboard.com/viewtopic.php?p=819511#819511

you can create slot in patch so that have been multi band frequency.
also for further information refer to link:
microstrip antenna by king
https://www.edaboard.com/viewtopic.p...6244&highlight

and
broad band microstrip antenna by kumar
https://www.edaboard.com/ftopic180360.html

What is the thickness of your phone? If it is a slim phone, then u should use monopole... If it's thickness larger than 15mm, you can consider PIFA