1. Microstrip antenna design handbook;Garg,2000
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3. Frequency agile microstrip antennas;Bhartia;Microw J,1982
4. Optically tuned patch antenna for phased array applications;Daryoush;IEEE AP-S Int Symp Digest,1986
5. A circular patch antenna for radio LANS;Guo;IEEE Trans Antennas Propag,1997