650 MHz Solid State RF Power development at RRCAT Indian - - PowerPoint PPT Presentation

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650 mhz solid state rf power development at rrcat
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650 MHz Solid State RF Power development at RRCAT Indian - - PowerPoint PPT Presentation

Sep 27, 2022 162 likes •270 views

650 MHz Solid State RF Power development at RRCAT Indian Institutions and Fermi lab Interaction Meeting P. R. Hannurkar, Akhilesh Jain, M. R. Lad RF Systems Division RRCAT, Indore 2 Work Mandate Serial Item Name Quantity Target date

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SLIDE 1

650 MHz Solid State RF Power development at RRCAT

  • P. R. Hannurkar, Akhilesh Jain, M. R. Lad

RF Systems Division RRCAT, Indore

Indian Institutions and Fermi lab Interaction Meeting

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SLIDE 2

2

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SLIDE 3

Work Mandate

Serial No. Item Name (650 MHz RF Power) Quantity Target date Remark 1

250 W amplifier module

1 Dec 2011

  • Achieved. Design

improvement was done for getting enhanced power. Fabricated and tested up to 550 W. 2

1 kW amplifier

1 Dec 2012 Prototype testing complete. 3

30 kW amplifier

1 Dec 2014 Will be delivered within proposed date.

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SLIDE 4

Progress Made

Design, engineering prototyping and RF testing; completed for the following components

  • 550 W solid state amplifier module (earlier 450 W)
  • Wide-Band Directional Couplers
  • 2-way 8 kW and 18 kW Power combiners
  • 16-way 4 kW Power combiner
  • Coaxial Transitions
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SLIDE 5

550 W module at 650 MHz

  • At 650 MHz, Design studies and simulation have been

carried out using push-pull LDMOS device, operating at bias voltage of 50 V .

  • Using multi-mode class F operating mode, a new

amplifier module was designed and tested in stages, up to 550 W. Earlier developed module was up to 450 W. 550 W solid state amplifier module

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SLIDE 6

550 W module: Measured Result

Saturated power = 600 W Gain at 550 W: 17 dB Input VSWR: 1.1 P1dB: 500W

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SLIDE 7

1 kW amplifier demonstration

Saturated power = 1100 W

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SLIDE 8

650 MHz, passive RF Components Developed at RRCAT

Wide-Band Directional Couplers 2-way 8 kW and 18kW Power combiners Output port: 3-1/8” EIA Coaxial Transitions 3-1/8” EIA to 1-5/8” EIA 1-5/8” EIA to N Type 1 kW 4 kW 20 kW 16-way 4 kW Power combiner Output Port: 1-5/8” EIA

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SLIDE 9

Work plan - 2012

  • Design and RF circuit simulation of power amplifier

module with efficiency > 60%. - Complete

  • Compact design of power dividers (complete) and

combiners

  • Improved directivity design for directional coupler
  • Design and testing of 1 kW amplifier- successful

prototype testing

  • Study of amplitude and phase synchronization scheme
  • Development of control and HMI hardware/software-

First set of software ready

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SLIDE 10