Analysis of Operational Amplifier Parameter Impact on Negative-Impedance Converter Characteristics

The article deals with a low pass op-amp model with high gain at DC and a single-pole frequency response and presents a technique for simple analysis of negative inductance compensator (NIC) circuits. Analytical expressions are derived for NIC frequency response analysis in case of operational amplifier finite bandwidth. Besides, the ideal NIC circuit comparison results are provided. Calculations show that op-amp finite bandwidth has impact on NIC impedance at frequencies 10 times lower than gain-bandwidth product. The obtained analytical results are in good agreement with experimental setup measurements of NIC implementation to electrically small antenna impedance matching.

Authors: Belenko D.V.

Direction: Электродинамика, микроволновая техника, антенны

Keywords: Electrically-Small Whip Antenna, Matching, Negative Reactive Element

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