Design dual band internal ante...
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Design dual band internal antennasdesignfeature By Leslie J Reading, Galtronics
YOU CAN FIT MOST CELLULAR PHONES WITH AN INTERNAL ANTENNA IF YOU GAIN A THOROUGH UNDERSTANDING OF THE PHYSICS OF THE PROBLEM AND IF YOUR PERFORMANCE EXPECTATIONS REMAIN CONSISTENT WITHIN SOME FUNDAMENTAL LIMITS.
Designing dual-band internal antennas
A
s cellular telephones have evolved over the issues conflict with each other (see sidebar “Factors years, so have their components, particularly the to consider in internal-antenna design”). antennas. The first cellular telephones were big, heavy, and clumsy but worked well using large, coax- THE BASIC MODEL fed, half-wavelength antennas. As cellular-phone Figure 1 illustrates a dual-band internal antenna handsets became smaller, so did the antennas. By us- in its elementary form. This simple mod
YOU CAN FIT MOST CELLULAR PHONES WITH AN INTERNAL ANTENNA IF YOU GAIN A THOROUGH UNDERSTANDING OF THE PHYSICS OF THE PROBLEM AND IF YOUR PERFORMANCE EXPECTATIONS REMAIN CONSISTENT WITHIN SOME FUNDAMENTAL LIMITS.
Designing dual-band internal antennas
A
s cellular telephones have evolved over the issues conflict with each other (see sidebar “Factors years, so have their components, particularly the to consider in internal-antenna design”). antennas. The first cellular telephones were big, heavy, and clumsy but worked well using large, coax- THE BASIC MODEL fed, half-wavelength antennas. As cellular-phone Figure 1 illustrates a dual-band internal antenna handsets became smaller, so did the antennas. By us- in its elementary form. This simple mod
关键词： Design internal antennas
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