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Simple, Efficient Microwave Hybrid Power Dividers. By Robert J. Templin W5OE Roadrunners Microwave Group. Reasons for Hybrids. EME and other applications require higher microwave power High power MW amps are TWTs or other high voltage devices

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Simple efficient microwave hybrid power dividers

Simple, Efficient MicrowaveHybrid Power Dividers

By Robert J. Templin

W5OE

Roadrunners Microwave Group


Reasons for hybrids
Reasons for Hybrids

  • EME and other applications require higher microwave power

  • High power MW amps are TWTs or other high voltage devices

    not happy to sit out at the antenna feed point


Reasons for hybrids1
Reasons for Hybrids

  • With high-power MW amps in the shack, line losses are significant

  • A 200 W amp in the shack with a 3 db line loss is only 100 W at the feed


Reasons for hybrids2
Reasons for Hybrids

  • High power MW solid state amps operate at 28 volts and can be placed at the feed point

  • Line losses are eliminated

  • High power MW amps can be combined with hybrids to outpower TWT’s


Eu design

Hybrid

Combiner


N6CA 23cm ring-hybrid using tubing for the ring

-

Tubular ring element is a problem for other bands



Critical dimensions

Radius A

Radius B

Radius C

Spacing

1.5l Divided by 2p (0.2387 free space l)

Radius A minus .125”

Radius A plus .125”

0.100” for all bands

Critical Dimensions


Critical dimensions1
Critical Dimensions

  • Connector electrical spacing 90, 90, 90, 270 degrees

  • Linear Spacing A, A, A ,2A


Precautions
Precautions

  • Microwaves at high power levels deserve biological care!

  • You wouldn’t stick your head in a microwave oven, don’t get near high power feeds!


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