A compact modulator circuit with high current protection for low chirp pulsed IMPATT oscillator

Author

Bhanja, Sukhendu ; Sarkar, Mousumi ; Majumdar, Arijit ; Ghoshal, Tanmay

Author_Institution

Circuits & Syst. Div., SAMEER, Kolkata, India

fYear

2013

Firstpage

1

Lastpage

2

Abstract

A compact pulsed modulator circuit is presented which can drive pulsed IMPATT diode at Ka band with peak current of 18A and duty ratio of 0.04%. A TTL pulse generator circuit using solid state delay is developed for driving the bias circuit which has a good temperature stability. A protection circuit is also incorporated to prevent burn-out of the diode at high current. A Ka band pulsed IMPATT oscillator is designed and developed using the pulse modulator. Very low chirp is obtained using constant current source and varying the slope of the bias current pulse. A peak power of 12W has been realized with a chirp bandwidth of 150 MHz.

Keywords

IMPATT oscillators; circuit stability; modulators; pulse generators; pulse modulation; transistor-transistor logic; Ka band pulsed IMPATT oscillator; TTL pulse generator circuit; bandwidth 150 MHz; bias circuit; bias current pulse slope; compact pulsed modulator circuit; constant current source; duty ratio; high current protection; low chirp pulsed IMPATT oscillator; protection circuit; pulsed IMPATT diode; solid state delay; temperature stability; Bandwidth; Chirp; Frequency modulation; Oscillators; Pulse generation; Radio frequency; Protection circuit; Pulse IMPATT diode; Pulse modulator; TTL pulse generator;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Electromagnetics Conference (AEMC), 2013 IEEE

Conference_Location

Bhubaneswar

Print_ISBN

978-1-4799-3266-5

Type

conf

DOI

10.1109/AEMC.2013.7045074

Filename

7045074