Communication-concepts 2M 1KW Amateur Application Note User Manual download pdf

MRFE6VP61K25H MRFE6VP61K25HS 2 Meter Amateur

RF Reference Design Data

Freescale Semiconductor

RF Power Reference Design Library

2 Meter Amateur Reference Design

High Ruggedness N--Channel Enhancement--Mode

Lateral MOSFETs

Reference Design Characteristics

This document describes a high efficiency, rugged linear amplifier reference

design for 2 meter amateur band (144 MHz -- 148 MHz) operation. Because of

the ruggedness and low thermal resistance of the MRFE6VP61K25H transistor

used in the design. the design can output high power even when operating into

high VSWR. The amplifier can be biased for Class AB linear or Class C

operation and is suitable for both analog and digital waveforms (AM/SSB or

WSJT/FM/CW).

 Frequency Band: 144--148 MHz

 Output Power: >1250 Watts CW

 Supply Voltage: 50 Vdc

 Power Gain (Typ): 26 dB

 Class C Drain Efficiency (Min): >78%

 IMD @ 1 kW Output: < --28.5 dB

The MRFE6VP61K25H transistor used in this design is one of the devices in

Freescale’s RF power enhanced ruggedness 50 volt LDMOS product line. These

devices, including the 600 watt MRFE6VP5600H and the 300 watt

MRFE6VP6300H, are all specifically designed for 50 volt operation under harsh

conditions.

2 METER AMATEUR REFERENCE DESIGN

This reference design is designed to demonstrate the RF

performance characteristics of the MRFE6VP61K25H/HS

devices operating in 144--148 MHz amateur radio band. The

reference design shows two operational modes with different

optimizations, V

=50volts,I

= 2500 mA for Class AB

linear operation or V

=43volts,I

=200mAforClassC

operation.

REFERENCE DESIGN LIBRARY TERMS

AND CONDITIONS

Freescale is pleased to make this reference design

available for your use in development and testing of your

own product or products. The reference design contains an

easy--to--copy, fully functional amplifier design. It consists of

“no tune” distributed element matching circuits designed to

be as small as possible, and is designed to be used as a

“building block” by our customers.

HEATSINKING

When operating this fixture it is critical that adequate

heatsinking is provided for the device. Excessive heating of

the device may prevent duplication of the included

measurements and/or destruction of the device.

Available at http://www.freescale.com. Go to Support/Software & Tools/

Additional Resources/Reference Designs/Networking

Rev. 0, 6/201 1

Freescale Semiconductor

Technical Data

 REFERENCE DESIGN IN 1st REVIEW -- 06/03/11

 Freescale Semiconductor, Inc., 2011.

ll rights reserved.

MRFE6VP61K25H

MRFE6VP61K25HS

2 Meter Amateur

144--148 MHz, 1250 W CW, 50 V

2 METER AMATEUR

REFERENCE DESIGN

OUTPUT

INPUT

BIAS

M=Match

Figure 1. 2 Meter Amateur Reference Design Fixture

1 2 3 4 5 6 ... 15 16

Summary of Contents

Page 1 - 2 Meter Amateur

MRFE6VP61K25H MRFE6VP61K25HS 2 Meter Amateur1RF Reference Design DataFreescale SemiconductorRF Power Reference Design Library2 Meter Amateur Reference

Page 2

10RF Reference Design DataFreescale SemiconductorMRFE6VP61K25H MRFE6VP61K25HS 2 Meter AmateurRuggednessMRFE6VP61K25H is a very rugged part capable ofh

Page 3 - FIXTURE IMPEDANCE

MRFE6VP61K25H MRFE6VP61K25HS 2 Meter Amateur11RF Reference Design DataFreescale SemiconductorTHERMAL MEASUREMENTSAfter one minute at 1 kW CW 44 volt s

Page 4

12RF Reference Design DataFreescale SemiconductorMRFE6VP61K25H MRFE6VP61K25HS 2 Meter AmateurREFERENCES1. “RF LDMOS Power Modules for GSM Base Station

Page 5

MRFE6VP61K25H MRFE6VP61K25HS 2 Meter Amateur13RF Reference Design DataFreescale SemiconductorAPPENDIX ACautionsThe board drive level is very low and e

Page 6 - IMD MEASUREMENT

14RF Reference Design DataFreescale SemiconductorMRFE6VP61K25H MRFE6VP61K25HS 2 Meter AmateurAPPENDIX BMounting TipsAn Arlon TC350 PCB was chosen for

Page 7

MRFE6VP61K25H MRFE6VP61K25HS 2 Meter Amateur15RF Reference Design DataFreescale SemiconductorAPPENDIX CCopper Heatsink for 2 Meter Amateur FixtureA2.7

Page 8

16RF Reference Design DataFreescale SemiconductorMRFE6VP61K25H MRFE6VP61K25HS 2 Meter AmateurInformation in this document is provided solely to enable

Page 9 - Extended Gate Voltage Range

2RF Reference Design DataFreescale SemiconductorMRFE6VP61K25H MRFE6VP61K25HS 2 Meter AmateurPERFORMANCE AND RF MEASUREMENTSMeasurement is done using a

Page 10 - Reliability

MRFE6VP61K25H MRFE6VP61K25HS 2 Meter Amateur3RF Reference Design DataFreescale SemiconductorCIRCUIT DESCRIPTIONThe input circuit uses a 9/1 balun tran

Page 11 - THERMAL MEASUREMENTS

4RF Reference Design DataFreescale SemiconductorMRFE6VP61K25H MRFE6VP61K25HS 2 Meter AmateurFigure 4. 2 Meter Amateur Reference Design Component Layou

Page 12 - REFERENCES

MRFE6VP61K25H MRFE6VP61K25HS 2 Meter Amateur5RF Reference Design DataFreescale SemiconductorVIEWS OF 2 METER AMATEUR REFERENCE DESIGNFigure 5. 2 Meter

Page 13 - APPENDIX A

6RF Reference Design DataFreescale SemiconductorMRFE6VP61K25H MRFE6VP61K25HS 2 Meter AmateurIMD MEASUREMENTIMD measurement was done using two signal g

Page 14 - Mounting Tips

MRFE6VP61K25H MRFE6VP61K25HS 2 Meter Amateur7RF Reference Design DataFreescale Semiconductorate: 3.NOV.2010 14:46:32DFigure 7. 800 W Two--Tone Spectru

Page 15 - APPENDIX C

8RF Reference Design DataFreescale SemiconductorMRFE6VP61K25H MRFE6VP61K25HS 2 Meter Amateurate: 3.NOV.2010 14: :D51 00Figure 9. 400 W Two--Tone SPect

Page 16 - How to Reach Us:

MRFE6VP61K25H MRFE6VP61K25HS 2 Meter Amateur9RF Reference Design DataFreescale SemiconductorHARMONIC MEASUREMENTSAt the one kW level, second harmonic

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