Sajjad Mahdizadeh

Astrophysik I.Physik – Universität zu Köln

Radio Telescope Receivers

Abstract: In this seminar, I will try to give an overview of the hardware of the radio telescope receivers: from the antenna’s feed point to the data. The side of the receiver facing the antenna is called the frontend. The other side is called the backend, which produces the data for astronomers. A large fraction of the talk will explore the heterodyne receivers, as they are a favorite receiver type for radio astronomy: a Local Oscillator (LO) and a mixer are used to down-convert the astronomical signal to lower frequencies for further processes. As a part of the talk, I will briefly cross my Ph.D. project, which has been about frequency stabilization of the 4.7 THz Quantum Cascade Laser (QCL), serving as the LO, to improve the spectral resolution of the high frequency (H) channel of the SOFIA telescope’s upGREAT receiver. The talk has a taste of experimental physics and laboratory, somewhat different from typical astronomy seminars.

یکشنبه 17 اردیبهشت 1402، ساعت 17:30

Sunday 7 May 2023 – 17:30 Tehran Time

Hybrid Seminar

آمفی تئاتر دانشکده فیزیک-تالار جنابPhysics Department – Amphitheater- Jenab Hall/

https://vc.sharif.edu/ch/cosmology

گزینه ورود به صورت مهمان – Enter as a Guest