A hybrid phase shifter and control method based on liquid crystal and switch
A phase shifter and switch technology, which is applied to waveguide devices, antennas, circuits, etc., can solve the problem of inability to continuously adjust equalization, and achieve the effects of simple structure, mature technology and low insertion loss.
Inactive Publication Date: 2021-10-12
南京星腾通信技术有限公司
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Nanjing Xingteng Communication Technology Co., Ltd. also discloses a PIN tube-based three-branch microstrip line adjustable phase shifter in the invention patent with the application number 201911340803.0, which realizes the discontinuous change of the phase at 90° / 180°, but The phase shifter can only realize the change of the two states of the phase, and cannot continuously adjust the phase
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[0051] The switching phase shifting unit uses a "π" type phase shifter, which can realize a 90° phase jump. The impedance converter unit 213 in the present invention adopts a microstrip line impedance converter.
[0052] The packaged liquid crystal is selected when no bias voltage is applied, and the relative dielectric constant is ε r =3.6, the loss tangent is tanδ=0.01, when the bias changes the bias voltage, ε r The range of change is 3.6~5.0, the glue is selected ε r =4.4, tanδ=0.005 epoxy resin glue, test results show that the working frequency band of this liquid crystal phase shifter covers 11.5-14.5GHz, by changing the bias voltage, the phase shift within the range of more than 180° can be realized. Since the DC bias line of the liquid crystal phase shifter is located inside the section 221 of the interdigitated capacitor, the DC bias signal will not interfere with the radio frequency end.
[0053] When the hybrid microwave phase shifter is in the "on" working state...
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Abstract
The invention relates to a hybrid phase shifter based on liquid crystals and switches and a control method. The hybrid phase shifter includes an upper shell, a microwave dielectric plate and a lower shell. The microwave dielectric plate adopts a double-sided printing process, and the printing faces the lower shell. The switching phase shifter unit of the body and the liquid crystal phase shifter unit facing the upper shell. The control method is to change the voltage on both sides of the branch structure of the microstrip line through the DC bias line via hole to control the phase jump of the switch phase shifter unit to achieve a 90° phase jump; through the liquid crystal phase shift DC bias line control The bias voltage of the liquid crystal, thereby controlling the continuous change of the dielectric constant of the liquid crystal material, and then continuously changing the phase offset of the signal, thereby controlling the degree of phase shift of the liquid crystal phase shifter unit, and realizing a phase shift within a band greater than 180°. The liquid crystal phase shifter of the present invention can realize continuous phase adjustment, and the switch phase shifter can realize 90° or 180° phase jump, and a large range, even 0-360° phase, can be realized through the cascade cooperation of the two Precise regulation.
Description
technical field [0001] The invention relates to a hybrid phase shifter based on liquid crystals and switches and a control method, belonging to the technical field of microwave phase shifters. Background technique [0002] As a common electronic device, a phase shifter is mainly used to adjust the phase of radio frequency / microwave transmission signals. It is a necessary device for phased array antenna systems, 5G / 6G mobile communication systems, etc. Traditional phase shifters are mainly analog phase shifters, which change the electrical length of the radio frequency signal transmission path and achieve phase delay by introducing transmission delay. The advantage of the analog phase shifter is that the technology is mature and the cost is low, but its disadvantage is that the insertion loss is high, and the size will continue to increase with the increase of the phase shift. With the rapid development of semiconductor technology, various digital phase shifters are emerging...
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IPC IPC(8): H01P1/18H01Q3/36
CPCH01P1/18H01Q3/36
Inventor 王鹏程王正斌宋飞朱劼
Owner 南京星腾通信技术有限公司