Dual-Frequency Planar Inverted-F Antenna （双频平面倒F天线）

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Dual-Frequency Planar Inverted-F Antenna
简介:Cellular telephone handsets are now being designed
to have dual-mode capabilities. In particular, there is a requirement
for internal antennas for GSM and DCS1800 systems. This
paper describes a novel planar dual-band inverted-F antenna for
cellular handsets, which operates at the 0.9-GHz and 1.8-GHz
bands. The dual-band antenna has almost the same size as a
conventional inverted-F antenna operating at 0.9 GHz and has
an isolation between bands of better than 17 dB. The bandwidths
of the antenna are close to those required for the above systems.
Good dual-band action is also obtained for other frequency ratios
in the range of 1.3–2.4. Studies also show that the dual-band
antenna can operate with one or two feeds. A finite-difference
time-domain analysis has been shown to give calculated results
close to those measured.
简介:
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