| Summary: | 碩士 === 國立臺灣科技大學 === 電機工程系 === 105 === This thesis consists of two independent researches. In the first part, a pattern reconfigurable antenna using phase reconfigurable synthesized transmission line (PR-STL) is proposed. The phase reconfigurable STL, whose electrical length can be switched between two states, while characteristic impedance remains in a fixed value, can function as a 1-bit phase switch; it is then loaded at the output of a wilkinson power divider to achieve a switchable output phase.
On the other hand, a two-port antenna is also designed. The novelty is that, with its unique structure, the radiation mechanism of the antenna is a combination of dipole and monopole antenna. Furthermore, by integrated the two-port antenna with the switchable power divider, a pattern reconfigurable antenna is then developed. The experiment results verify the proposed antenna can switch between an omnidirectional and directional pattern.
Secondly, a on-chip two-element integrated phased array using integrated passive device (IPD) process is studied. The integrated network is operated as a retro-directive array (RDA) at lower operating frequency, and a beam-switching phased array at higher operating frequency. This dual-mode network is realized by using a novel composite right/left-handed synthesized transmission lines, whose characteristic impedance and phase can be independently designed at two arbitrarily chosen frequencies. Moreover, the IPD process is introduced to achieve remarkable circuit miniaturization. Measured responses is comparable to that previously fabricated on printed circuit board (PCB).
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