Miniaturization of Mobile Phone Antennas by Utilization of Chassis Mode Resonances
نویسندگان
چکیده
The miniaturization of mobile phone antennas by means of purposeful tuning of chassis mode resonances is discussed. A simple approach to antenna independent analysis of chassis mode resonances is introduced. A novel technique for simultaneous tuning of a bar-type phone chassis in two frequency bands is presented. The optimum design and placement of capacitive coupling elements for excitation of electric dipole type resonances is considered. Experimental results for a GSM quad-band antenna mock-up featuring a record bandwidth to volume ratio confirm the usefulness of the approach.
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