ARGOS receiver 1GHz … 2GHz → 0.1MHz…1GHz

Components panel Front panel

Back panel and connectors

Localoscillator #110,000GHz13dBm min

Aircable fromantenna-tower to receiver-10dB @ 1,415GHz

RF-amplifier /equalizer

att -3dB

1. mixerIF-isolator-0,7dB

1. IF-filter 8,500GHzB3dB=+-500MHz=1GHz-1dB

BPF

2. mixer

LO-isolator

2. IF amplifier0.1MHz...1GHz

Overview Digital FFT Radio-Spektrograf

File: RX1GHz.ppt Revision: 1.5

Updated by: Chr. Monstein, 21.05.2004Created by : Chr. Monstein , 13.12.1999

Astronomical Institute ETHZ

Synthesizer-isolator

26dB minNF<5dB

IF RF

LO

RF IF

LO

41dB

-6dB -6dB

15dB

att -3dB

1. IF-amplfier8-12,4GHz

ADC 8bit2Gs/sec

PC &FFT

LowpassfilterF3dB=1GHz

a=-1dB

Localoscillator #29,000GHz13dBm min

Frf

Fsy

IF1

IF2

IF2=IF1-FloIF1=Fsy-FrfFrf=Fsy-IF2-FloIF2=Fsy-Flo-Frf

Flo

IF-isolator-0,7dB

Level: 104dB

SMA-bridge

SMA-bridge

N/SMA

PowerDivider

-6dB

+6dBm+-3dBm10MHz Ref.Input

PowerDivider

-6dB

Log.Detector

Video outN/SMA

+15V

+15V +15V

+15V +15V

RX3N/SMADSP

+5.0V

Frequency diagram

F1h=9,00GHz

F1z=8,50GHz

F1l=8,00GHz

Fh=2,0 GHz

Fl=1,0 GHz

Power

Frequency

1. mixer stage

F2h = 1000 MHzF2l = 0.1 MHz

2. LocaloscillatorLO2 = 9,000 GHz

Power

Frequency

2. mixer stageSelection withlowpassfilter

F1 = LO1 ± Frf = 8,500 GHz ± 500 MHz

F2 = F1 - LO2 = 500 MHz ± 500 MHz

Upper sideband USBwill not be used

Selection of lowersideband LSB bybandpassfilter

Frf =1,5 GHz

1. LocaloscillatorLO1 = 10,000 GHz

ARGOS receiver as a frontend to CALLISTO radio-spectrometer

ARGOS baseband 0.1MHz…1GHz received by CALLISTO which accepts 45MHz…870MHz

Inpu

t fre

qeun

cy