Mixed phase shifter based on MEMS switch

A technology of phase shifters and switching devices, applied in waveguide devices, electrical components, circuits, etc., can solve problems such as large insertion loss and limited bandwidth, reduce the number of switches, reduce insertion loss, and be easy to implement in practice Effect

Pending Publication Date: 2019-08-09
SUZHOU XIMEI MICRO NANO SYST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Reflective 3db directional coupler has large insertion loss and limited bandwidth

Method used

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  • Mixed phase shifter based on MEMS switch
  • Mixed phase shifter based on MEMS switch
  • Mixed phase shifter based on MEMS switch

Examples

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Embodiment Construction

[0023] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0024] like figure 1 A hybrid phase shifter based on a MEMS switch, which is different in that it is composed of a 180° phase shift unit, a hybrid phase shift unit and a 22.5° phase shift unit. The hybrid phase shifting unit includes a radio frequency input transmission line (the output transmission line of the 180° phase shifting unit), a radio frequency output transmission line, and the 21st branch and the 22nd branch which are respectively located between the radio frequency input transmission line and the radio frequency output transmission line and connected in parallel. Specifically, the 21st branch is a 0° / 45° bit branch, including the 211th switching device of the...

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Abstract

The invention relates to a mixed phase shifter based on an MEMS switch. The mixed phase shifter is composed of a 180-degree phase shifting unit, a mixed phase shifting unit and a 22.5-degree phase shifting unit. The mixed phase shifting unit comprises a radio frequency input transmission line, a radio frequency output transmission line, and a 21th branch and a 22th branch located between the radiofrequency input transmission line and the radio frequency output transmission line and connected in parallel. Therefore, an MEMS contact switch and an MEMS capacitive switch are applied into a phaseshifter in a mixing mode, and the phase shift of 0 degree / 45 degrees / 90 degrees / 135 degrees is integrated into one bit. Compared with the traditional four-bit switch line type phase shifter, the mixedphase shifter reduces the use of T-shaped junctions and can effectively reduce insertion loss. It can be met that a four-phase shifter uses two-type phase shift modes and can combine the advantages of the two-type phase shift modes to reduce the number of the switches, the structure design is more flexible, the performances are competitive, the whole layout is simple, and the practical implementation is easy.

Description

technical field [0001] The invention relates to a switch structure, in particular to a hybrid phase shifter based on MEMS switches. Background technique [0002] The RF phase shifter is a key component of the phased array antenna, and is widely used in automotive electronics, mobile communications, instrumentation and other fields. The insertion loss of the phase shifter directly affects the power dynamic range of the signal. In the traditional phased array, because the traditional phase shifter will introduce a very large loss, usually 7-8dB, the antenna must be connected to the transmit / receive module (T / R) before connecting the phase shifter, in order to Compensation increases the power of the signal and compensates the huge loss caused by the traditional phase shifter. Compared with traditional phase shifters, MEMS phase shifters have smaller radio frequency loss, lower cost, wider frequency band, easy integration with IC circuits, and easy miniaturization. In large p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/18H01Q3/36
CPCH01P1/184H01Q3/36
Inventor 肖倩王竞轩陈涛刘泽文李宏军
Owner SUZHOU XIMEI MICRO NANO SYST CO LTD
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