| Summary: | 碩士 === 國立高雄應用科技大學 === 光電與通訊研究所 === 97 === This thesis mainly study in RFID reader antenna. There are used the slot-coupled fed with broadband operation and circular polarization antennas. The design of the antenna are simulated by the software HFSS for the comparison.
In the Chapter 2, a slot-coupled circularly polarised square patch antenna design a pair of radiating square patches with a cross-slot and a microstrip feed line are both etched on the top of a microwave substrate, and a coupling arrowshaped slot is etched on the bottom of this substrate.
In the Chapter 3, a novel circularly polarized circular slot antenna using a C-shape-like strip or a pair of perturbation strips will be applied. This antenna was fed by slot-coupled and allowed easy adjustment by trimming the perturbation strips length. A good circularly polarized wave can be easily excited.
In the Chapter 4, a novel circularly polarized annular-ring slot antenna in the UHF band is presented. In the proposed design, circular polarization is generated using a proper asymmetry within the annular-ring slot structure.
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