Memristor the Missing Element

Memristor the Missing Element

A QPSK Modulator Using Microwave Couplers and Switches for Satellite Transmitter and Its Performance Analysis Course: Digital Communication and Coding Professor: Dr. Tareq AlNafouri

Presented By: Farhan Abdul Ghaffar QPSK MODULATION INTRODUCTION WHY QPSK MODULATION?

REMOTE SENSING PURPOSES X BAND 8 GHz to 12 GHz DESIGN OF THE MODULATOR THEORY OF THE MODULATOR

CIRCUIT ELEMENTS MICROWAVE COUPLERS POWER DIVISION PHASE SHIFT S PARAMETERS

HIGH SPEED MESFET SWITCHES MICROWAVE COUPLERS WILKINSON DIVIDER THREE PORT ELEMENT

EQUAL POWER DIVISION S21 = S31= -3dB NO PHASE SHIFT S21= S31 BRANCH LINE HYBRID COUPLER

FOUR PORT ELEMENT EQUAL POWER DIVISION S21 = S31= -3dB QUADRATURE PHASE SHIFT S31- S21 = 90

RAT RACE COUPLER FOUR PORT ELEMENT EQUAL POWER DIVISION S23 = S13= -3dB

180 PHASE SHIFT S23- S13 = 180 STRUCTURE and WORKING TESTING AND MEASUREMENT

DATA RATE = 160Mbps

PHASE IMBALANCE = 0.4 AMPLITUDE IMBALANCE < 1% EVM = 0.75% PERFORMANCE ANALYSIS AMPLITUDE IMBALANCE

PHASE IMBALANCE ERROR VECTOR MAGNITUDE EVM OF MODULATOR WITH AMPLIFIERS EVM OF THE TRANSMITTER < 8%

EVM vs. BER To keep the value of EVM minimum we need S parameters to be as optimized as possible. EVM and SNR

Lesser EVM will give greater SNR and lesser Probability of Error HARDWARE OF THE MODULATOR

Q & A Session

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