| Summary: | 碩士 === 國立交通大學 === 電信工程系 === 88 === In this report, we present the study of a dual-band (2.45GHz and 5.78GHz) slot antenna. And also development of a design 2.45GHz slot antenna arrays.
In the first part, we present a novel dual-band microstrip-fed slot antenna for wireless communication systems at 2.45GHz and 5.78GHz. The first higher order modes of a slot antenna is utilized to create the dual-band antenna characteristic. The slot antenna is originally designed to radiation at 2.45GHz. By adding a stub at the ground plane, we can create another resonant frequency at 5.78GHz. We also integrate it with a band separator, so we can precisely measure the transmitting and receiving signals. We can conclude the dual-band microstrip-fed slot antenna is suitable for transceiver system by measured results.
In the second part, 2.45GHz parallel feeding slot antenna array is investigated. Compare the bandwidth and power combining ability of series feeding slot microstrip-fed slot antenna, the parallel feeding microstrip-fed slot antenna, the later has wider bandwidth and larger power combining ability. Therefore, a set of 2 -element slot antenna array and set of 4-element slot antenna array are studied in this design. Good agreement has achieved between the theoretical and measured results.
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