科研之友
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摘要
A novel differential dual-frequency patch antenna using a coupling feed is proposed. The proposed antenna is composed of a radiation patch with two U-shaped slots, two differential I-shaped feeding aluminum blocks, and a ground. Two resonant frequencies are realized by two slots in the radiation patch. The lower resonant frequency is mainly controlled by the dimension of the radiation patch. The upper resonant frequency is mainly determined by the length of the slots. The two I-shaped feeding aluminum blocks can broaden the bandwidth of the proposed antenna. Simulated and measured results agree well. Measured results show that this proposed antenna can operate at 1.03 and 1.75 GHz with fractional bandwidths of 7.0% and 19.6%, respectively. This proposed antenna can operate with symmetrical radiation pattern, high gain, and low cross-polarization.
