| Summary: | 碩士 === 國立交通大學 === 電信工程研究所 === 105 === This thesis proposes an architecture of beam steering reflectarray antenna at millimeter wave bands, which has the properties of high-gain, narrow beamwidth, beam steering, etc. Besides, in order to achieve the beam steering function of the reflectarray antenna, this thesis also designs a reflective-type analog phase shifter with phase tuning range of more than 360°. It has the advantages of simple structure, easy manufacture and low cost. In addition to completing the design of reflectarray antenna and phase shifter mentioned above, this thesis also analyzes the beam steering function of the beam steering reflectarray antenna.
In the first chapter, the radiating elements and the associated phase shifters, which are used to design beam steering reflectarray antenna by some existing literature, have been introduced. This is the critical factor whether the reflectarray antenna has the function of beam steering. The fundamental of phase shifter and different types phase shifter are introduced in chapter two. In chapter three, we choose the phase shifter which is suitable for the antenna architecture used in this thesis and complete its design and measurement in the millimeter-wave bands. Chapter four completes the design of the reflecting surface of the reflectarray antenna and combine it with the phase shifter designed in chapter three to form a reflecting surface with the function of beam steering. In the last chapter, the composition of the radiating electromagnetic field of the reflectarray antenna will be discussed in terms of “scattering field” and “re-radiated field”, which were used to verify the function of beam steering.
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