1GHz Transceiver 2

8/9/2019 1GHz Transceiver 2

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PROFESSIONAL TRAINING

SM Wireless Solutions Proprietary Information

(100 % Owned Subsidiary of RFIC Solutions in India)

SM Wireless Solutions Pvt Ltd



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Girish W

Analog Design Engineer,

RFIC Solutions Inc.

[email protected]

1 GHz Transceiver KitDemonstration



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Introduction

The technology results in a high-tech business sector with an

increased need for engineering professionals, technicians and

technical managers trained in microwave and RF education, wireless

design and wireless communications

RF transceiver training kit serves as a training module in the area of RF

and wireless communication.

The training kit module provides complete training solution for those

interested in learning more about RF wireless communications and

microwaves.

Our Training Kit provides everything needed to teach both RF

microwave and solid states.



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Features

Along with RF transceiver, the kit includes characterization of various

transceiver sub blocks like

oscillator

Low noise amplifier (LNA)

Power amplifier (PA)

Mixer

Frequency synthesizer (PLL)

Students can check the output of individual block or complete

transceiver system by making connections through connectors

Students can perform more than 10 experiments

Students can practically use the kit according to their own requirement



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Objective:

Create awareness among students and college faculty regarding RF and

Microwave.

Enhance interest of students in this field.

To improve quality and quantity of work in RF and Microwave field and

thereby, encourage investors from setting up RF and Microwave industry in

India

Provide industry exposure as faculty doesn¶t get industry exposure and

hence their students fail to develop a vision about this field

Transceiv er Kit



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RF Transceiver Architecture

AB F

RF IX R

( n nverter)

Trans it/

receive itch

A

er A lifier

IF IX R

(U nverter)

Buffer A

cal scillat r

F

F

Attenuat r Attenuat r

Attenuat r

Antenna

Trans itter

In ut

Receiver

ut ut

r stal

RF

scillat r



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Advantages to Students:- Our Microwave Training Kit provides everything needed to

teach both RF microwave and solid states.

Our training kit manual provides a complete course in microwavetheory for those interested in learning more about wireless

communications and microwave training.

Students can easily understand the working of RF system which

helps them increasing their knowledge

Students will get the practical knowledge of how RF design works

Students having such type of practical knowledge can get hired soon

by big companies

Applications



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College can advertised about such extra practical knowledge they are

giving to students at lower cost.

The technology results in a high-tech business sector with an increased

need for engineering professionals, technicians and technical managers

trained in microwave and RF education, wireless design and wireless

communications.

Companies will hire students having RF practical knowledge. It increases

college popularity

Advantages to Colleges



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Specifications

lock Name Supply Current Supply Voltage

RF Oscillator 37 mA 5 V

LO Oscillator 37 mA 5 VLNA Amplifier 60 mA 5 V

AGC Amplifier 60 mA 5 V

Mixer down converter 50 mA 5 V

Mixer up converter 60 - 70 mA 5 V

Frequency Synthesizer 100 mA 5 V

uffer Amplifier 110mA 5V or 3V

Crystal Oscillator 20 mA 3.3 V

DC Specifications



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Cont..

AC Specifications

lock Name Frequency Pout Pin GainSupply

Voltage

RF Oscillator 1 GHz 14 dBm - - 5 V

LO Oscillator 980 MHz 13 dBm - - 5 V

LN AAmplifier 400MHz±4GHz -23 dBm -44 dBm 21.5 dB 5 V

AGC Amplifier 800 MHz 6 dBm -16 dBm -12 to 22 dB 5 V

Mixer down converter DC ± 2.5 GHz -16 dBm -23 dBm 7 dB 5 V

Mixer up converter 0.7 ± 1.4 GHz -10.6 dBm -10 dBm -0.6 dB 5 V

Frequency Synthesizer (PLL)

1.12 GHz - - - 3.3 V

Crystal Oscillator 30 MHz - - - 3.3 V

Attenuator (RF) 1 GHz -60 dBm - - 5 V

Attenuator (LO)

980 MHz -20 dBm - - 5 V

Power Amplifier 0.5 ± 6 GHz 19.7 dBm - 22 dB 3 V

Buffer Amplifier DC ± 1 GHz 21.7 dBm - 16.5 dB 5 V

Complete Output 0 - 20 MHz 7 dBm - - 5 V



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Kit includes major blocks of transmitter and receiver as listed below:

Receiver locks RF Oscillator

and Pass Filter ( PF) Low Noise Amplifier (LNA)

Mixer

Local Oscillator (LO)

Low Pass Filter (LPF)

AGC / VGA

PLL

Transmitter lock uffer Amplifier

IF Mixer

Power Amplifier

Power Amplifier (PA)

Low Pass Filter (LPF)

Kit Description



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Receiver Chain



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Receiver Architecture



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RF Oscillator

RF oscillator will generate 908 MHz frequency which is not generally used in

college Laboratory. This frequency is then filtered using a and Pass Filter.

Frequency: 908 MHz

Pout: 3.56 d m



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Low Noise Amplifier (LNA)

The LNA provides a high gain and low noise figure for single downconversion operating. It operates at frequency range of 400MHz to4000MHz. The RF signal from band pass filter gets amplified by LNA andfed to down converter mixer as a RF input.

Frequency: 908 MHz

Pout: 15.25 d m



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RF Mixer

The mixer operates at a broadband frequency range of DC to 2.4GHz. It providesthe typical conversion gain of 7d . The integrated LO driver supports a 50 ohm

differential input impedance with the low LO drive level.

Output Frequency:- 58 MHz



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Local Oscillator

Local oscillator will generate 850 MHz frequency which is used to drive the LO

path of Mixer. This frequency is then filtered using a and Pass Filter.

Output Frequency :- 850 MHz

Pout: 2.32dBm



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AGC / VGA

The input signal is amplified by the variable gain amplifier whose gain iscontrolled by the external signal Vc. It gives variable gain range of -12d to+22d . The output noise floor is í143 d m/Hz, which corresponds to a 9.5 dnoise figure at maximum gain. It operates from a supply voltage of 5V andconsumes 60mA of current.

Output Frequency :- 58 MHz



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VGA @ 1V VGA @ 0.65V

VGA @ 0.46V VGA @ 0.23V

Measured R esults of AGC / VGA



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Comments

RFIC did testing of transceiver kit and were able to achieve results.

Receiver block is working properly with 58 MHz output



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Transmitter Chain



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Transmitter Architecture



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Crystal Oscillator

We can work transmitter in two ways:

1) Crystal oscillator generates signal of 30MHz which is fed to buffer

amplifier operating for a frequency range of DC to 1GHz.

2) We can fed output of receiver i.e. 50MHz to input of buffer amplifier.

A G C

f e r A m p

T r a n s m i t t e r

I n p u t

R e c e i v e r

O u t p u t

C r y s t a l



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Buffer Amplifier

Buffer amplifier provides gain of 16.5dB at 20MHz which is feed to up

converter Mixer through attenuator. It operates at frequency range from

DC to 1 GHz



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IF Mixer

Mixer (up converter) mixes frequency from buffer amplifier (30MHz) and

local oscillator (850MHz) to generate 880 MHz to 1GHz signal



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Power Amplifier

Power amplifier is operating at 3V for frequency range of 0.5 ± 6GHz.

Low pass filter (LPF) which is connected after power amplifier gives

filtered output of GHz (frequency) which is transmitted by antenna

through transmit/receive switch.



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Comments

We are still working on testing of Transceiver Kit

We are working on transmitter section. We were able to check output

till IF mixer which came around 900 MHZ

Test points are present at output of each block to test the frequency of

various blocks. The output can be measured using various testing

instruments like Spectrum Analyzer, CRO etc.

Thus, students will be able to see the performance of each block of which they are unaware.



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Extra IC¶s used in Transceiver Kit

We used some extra circuitry in Transceiver Kit like extra Mixer, PA, etc

for its advanced applications and versions

We have PLL, which can be used in place of LO in receiver chain toobtain output from 2 ± 2.4 GHz

We have connectors that can be used to connect daughter cards or

interfacing with micro controller devices.



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1 GHz Transceiver Kit



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Experiments

This single kit contains various different projects and teaches about theRF system architecture.

Experiment# 1. Study and measurement of RF oscillator power output

Experiment# 2. Measurement of RF oscillator¶s oscillation frequencyand harmonics

Experiment# 3. Measurement of noise figure of RF/microwave lownoise amplifier

Experiment# 4. Study of Local oscillator parameters

Experiment# 5. Study and measurement of IF output from RF mixer for

variations in LO frequencies at receiver chain Experiment# 6. Study and measurement of frequency synthesizer

output

Experiment# 7. Study and measurement of AGC output with IF inputfrom Mixer



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Cont..

Experiment# 8. Study and measurement of RF/microwave receiver

parameters

Experiment# 9. Measurement of power for RF/microwave power

amplifier

Experiment# 10. Study and measurement of IF Mixer ( pconverter)parameters in transmitter chain

Experiment#11. Measurement of RF/microwave transmitter parameters

Experiment# 12. Study of Buffer Amplifier parameters

Experiment# 13. Study of Gain compression of RF Amplifiers

Experiment# 14. Study of Intermodulation Distortions in RF amplifiersand Mixer

Experiment# 15. Study of Buffer Amplifier parameters

Experiment# 16. Study of Power Amplifier parameters

Experiment# 17. Study of RF transceiver architectures and parameters



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Testing of Transceiver Module



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Test Eq uipment

Spectrum Analyzer

Power Supply

Power meter

CRO

RF connectors

50Ohm load termination



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Test Setup for R eceiv er



Test Setup for Transmitter

Power Amplifier

IF MI ER

( P Converter)

Buffer Amp

LPF

Attenuator Crystal

SMA 10

SMA 16LO

SMA 11

SMA 9SMA 12



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Future Work

We are trying to make this Kit more user friendly. For that we are making

provisions to check the output of Labkit on Laptop/PC by using

microcontrollers and proper interfacing.



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Thanking You .!!!!

1GHz Transceiver 2

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