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5W Transmitter harmonic filter Design

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SFactor

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transmitter harmonics power

i have designed a passive harmonic filter design ... but the proble is : the output power from PA is 5W and i can't find any coils that can carry this power ...
anyone knows company or manufacturer of high power coils ...
 

flatulent

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transmitter filter harmonic

This power level is not unusually high. Here are some pointers on the coils. Air core has lower loss. You may need to use through hole types. Check your filter design for current levels in the inductors. This will be the main source of loss and heating. You may have to do another design with lower currents.

What is the frequency range of your 5 W?
 

SFactor

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is there any company or manufuctrer for the air core coils with that range of power ... ?

regarding the frequency range, i designed two harmonic filters and switch between them using the pin diodes ...
the first filter ... from 45-75MHz
the second filter from 75-85MHz
 

nandopg

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You can easily use the spring air coils series from Coilcraft. Find specs and models for simulation on:
**broken link removed**

NandoPG
 

    SFactor

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