0/pi digital phase shifter based on ultra wide band balun

Abstract

The invention discloses a 0 / pi digital phase shifter based on ultra wide band balun. The 0 / pi digital phase shifter comprises the ultra wide band balun (A) and a broadband matching type single-pole double-throw switch (B) in corresponding connection with the output end of the ultra wide band balun, K1 and K2 are two control ends of the matching type single-pole double-throw switch, and control signals control microwave millimeter wave signals to be output through one port of the broadband matching type single-pole double-throw switch or through the other port of the broadband matching type single-pole double-throw switch respectively. The ultra wide band balun (A) comprises a lower surface metal gradient grounding board, a medium substrate, six upper surface metal sheets, a coplanar ground and coplanar stripline structure, five metalized through holes and an input-output port. The 0 / pi digital phase shifter is simple in circuit topology and design, high in phase shift precision and low in standing wave ratio of input and output voltages, and the difference value of all state insertion losses is small.

Description

technical field [0001] The invention relates to a digital phase shifter, in particular to a 0 / π digital phase shifter based on an ultra-wideband balun. Background technique [0002] The 0 / π digital phase shifter based on the ultra-wideband balun is an electronic component mainly used in electronic system equipment such as digital microwave communication, mobile communication, radar, electronic countermeasures and guidance instruments. In the control circuit of broadband microwave and millimeter wave frequency band, digital phase shifter is one of the main control circuits of microwave and millimeter wave. The main technical indicators describing the performance of this product are: 1) Operating frequency bandwidth; 2) Phase shift number; 3 ) Phase shift; 4) Phase shift accuracy; 5) Insertion loss; 6) Different insertion loss of each state; 7) Voltage standing wave ratio of input and output terminals of each state; 8) Switching speed; 9) Circuit size; 10) Output power 1 deci...

AI Technical Summary

Problems solved by technology

Similar products of 0 / π digital phase shifters, due to the defects of circuit topology and process implementation methods used in the design, coupled with large frequency bandwidth and large phase shift, whether it is coaxial, waveguide, hybrid integration, or low-temperature co-fired ceramic three-dimensional integration Circuits and other methods are still implemented by gallium arsenide monolithic integrated circuits, usually with poor electrical performance indicators

The main disadvantages are: 1) The circuit topology is complex; 2) The design is difficult; 3) The process is difficult; 4) The phase shift accuracy is low; 5) The voltage standing wave ratio of the input and output terminals is poor; 6) The operating frequency bandwidth is narrow; 7) The yield rate is low; 8) Affected by process control parameters, the electrical performance consistency between circuits is poor; 9) The circuit size is large

However, because the theoretical analysis of the irregular shape balun is still very difficult, the design and use of this type of balun can only rely on experience and experiments.

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