POWER LEVEL MONITORING DEVICE FOR GMRT RECEIVER. SURJYA NEOGY INSTITUTE OF RADIOPHYSICS & ELECTRONICS. Purpose. Initial Requirement : To Monitor Power Level at Various Stages of GMRT Receiver Chain
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INSTITUTE OF RADIOPHYSICS & ELECTRONICS
5. Instruments & GMRT Module
6. Characterization & Calibration
7. Antenna Base Measurements
9. Summery & Further Extension
RF signal port is DC blocked
Resistance connected to output provides improved matching
Compensating Capacitor ensures stable operation
Output currents from RF Detector are summed up and converted into output voltage
The circuit & PCB Layout is shown in next slides.
Directional Coupler PDC-10-5 is used to bypass required amount of signal to Detector Input
This introduces additional 10 dB of loss so that power level goes bellow -50dBm.
Amplifier MAR-6+ is employed to boost the signal strength
LM 7805 is used as Power Supply4.Construction
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