A new structure for reflection-type phase shifter with 360/spl deg/ phase control range
A new structure for reflection-type phase shifter with 360/spl deg/ phase control range
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360/spl deg/相位控制范围的反射式移相器新结构
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
D. Mirshekar
中科院分区：
文献类型：
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作者：
S. Bulja;D. Mirshekar
提出了一种新颖的360°反射式移相器。它由3分贝耦合器、谐振电路、晶体管和PIN二极管组成。通过控制变容二极管(晶体管)的电容来实现对相位的控制。这种新结构提供了完整的360度相移，相信它可以扩展到甚至超过360度的相移。推导了精确描述反射负载的特性、可获得的相移范围以及这种结构所施加的限制的方程。在一种情况下，通过谨慎地选择变容二极管，可以使传输损耗保持在2.6dB以下。此外，在另一种情况下，使用电容比(Cmax/Cmin)仅为1.28的双极晶体管获得360度的相位控制
A novel 360deg reflection type phase shifter is proposed. It comprises a 3-dB coupler, resonant circuits, transistors and PIN diodes. The control of phase is enabled by controlling the capacitance of the varactor (transistor). The new structure provides a full 360deg phase shift and it is believed that it can be extended to phase shifts even beyond 360deg. Equations are derived to precisely describe the behaviour of the reflective load, the range of obtainable phase shifts as well as the limitations imposed by such a structure. In one case it is shown that with a careful choice of the varactor the transmission losses can be kept to lower than 2.6 dB. Also, in another case the phase control of 360deg is obtained using a bipolar transistor with a capacitance ratio (Cmax/Cmin) of only 1.28