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Low Loss Reflective Passive Phase Shifter using Time Delay Element with Double Resolution
Low Loss Reflective Passive Phase Shifter using Time Delay Element with Double Resolution
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机译:使用具有双分辨率的时延元件的低损耗反射型无源移相器
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摘要
A phase shifter for altering the phase of a radio frequency signal is disclosed herein. A Lange coupler is used having reflective ports that are coupled to artificial transmission lines. The artificial transmission lines provide a reflection transmission path, the length of which can be determined by digital control lines. Transistors placed along the length of the central trace provide independent paths to ground that serve to shorten the electrical length of the ATL. Accordingly, by selectively turning the transistors on/off, the electrical length of the ATL can be selected and thus the amount of phase delay introduced by the phase shifter.
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