Novel digital and analog compatible ultra-wideband attenuator

Abstract

The invention discloses a novel digital and analog compatible ultra-wideband attenuator. When attenuation is changed, a phase compensation technology is applied to a monolithic microwave integrated circuit (MMIC) design to reduce insertion phase shift and ensure impedance matching. In a circuit design, a circuit is simplified by a control signal equivalent load method (namely a method that most circuits have the same communicating and shunt door width) for a metal semiconductor field-effect transistor (MESFET) and a shunting field-effect transistor (MESFET), and a direct current (DC) circuit is not needed. The MMIC shows high performance in an ultra-wide frequency band, and the feasibility of design ideas is confirmed by an on-wafer chip test. Integrated circuits for the ultra-wideband attenuator in a large dynamic range of a digital / analog low insertion phase shift are mainly and widely used for electronic components of electronic system equipment such as digital microwave communication equipment, mobile communication equipment, phased array radars, electronic resistance equipment, guidance equipment, instruments and the like.

Description

technical field [0001] The invention relates to an electronic component used for radar, communication and guidance, which is an ultra-wideband attenuator integrated circuit with low insertion phase shift and large dynamic range, and is compatible with digital and analog. Background technique [0002] GaAs-based microwave integrated circuit (MMIC) voltage-controlled variable attenuators are widely used in modern advanced electronic systems and equipment. Variable attenuators are used in: 1) wideband gain control blocks of automatic loss control (ALC) components, 2) wideband pulse modulators; 3) wideband reflectionless single-pole single throw (SPST) switches, 4) wideband vector modulators , 5) Wideband automatic gain control (AGC) amplifier. MMIC voltage-controlled variable attenuators have the characteristics of small size, light weight, high yield, low cost, etc., and are easy to use and low power dissipation. In view of the above applications, the variable attenuator has...

AI Technical Summary

Problems solved by technology

[0004] Due to the defects of the circuit topology and process implementation method used in the design, especially for the application requirements of wide frequency bandwidth and large attenuation, the electrical performance indicators are usually difficult to meet the requirements

The main disadvantages are: 1) the circuit topology is complex; 2) the design is difficult; 3) the process is difficult; 4) the attenuation accuracy is low; 5) the working frequency band is narrow; When changing, the accompanying signal phase changes greatly; 7) The voltage standing wave ratio of the input and output terminals of each decay state is greatly different; 8) Affected by process control parameters, the electrical performance consistency between circuits is poor; 9) The circuit size is large

In particular, the large phase difference between each decay state is a common shortcoming of many similar products, which limits the wide application of this type of product in phased array radar systems and many advanced communication systems and weapon systems

Images