Performance Stabilization of Steep Gain Gradient class Ultra-wideband Direct Conversion IFM Receiver of Homodyning based Systems

  • Mahadev Sarkar Central D&E, Bharat Electronics
  • Vipin Kumar Central D&E, Bharat Electronics
  • Sivakumar R Central D&E, Bharat Electronics
  • Nagarjuna Charlu S Central D&E, Bharat Electronics
Keywords: Homodyning down conversion, Instantaneous Frequency Measurement (IFM), Direction Finding (DF), Direction of Arrival (DOA), Gain slopes and Domain based equalizers

Abstract

this article explains finding of power issues and the
methodology of giving a suitable solution for performance
stabilization of an ultra-wideband very high gain receiver with steep
gain gradient. The origin of this problem lies in homodyning down
conversion technique itself. Its LO is derived from input RF source.
Varieties of frequency band limited equalizers like RC, RL and RLC
are examined to overcome initial gain fluctuations at low frequencies
as well as region based gain humps to reduce slope gradient. Thereby
at the same time it helps to enhance practically achievable gain
against theoretical gain at around highest frequencies by reducing
power distribution among all harmonic and spurious components
caused by lower frequency elements

Author Biographies

Mahadev Sarkar, Central D&E, Bharat Electronics

Central D&E, Bharat Electronics Bangalore-560013.

Vipin Kumar, Central D&E, Bharat Electronics

Central D&E, Bharat Electronics
Bangalore-560013

Sivakumar R, Central D&E, Bharat Electronics

Central D&E, Bharat Electronics
Bangalore-560013

Nagarjuna Charlu S, Central D&E, Bharat Electronics

Central D&E, Bharat Electronics
Bangalore-560013

Published
2017-04-30