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Catégorie 3: Mesures

 A design challenge

A very common matching network is the T-match with 2 capacitors and 1 inductor.


This is network number 6 in the table.


On the second page is a description of the T-match.


Like the L-match example, the T-match can be used when RL is greater than Rs.


Here's the challenge:
Let Rs = 50 ohms and RL = 250 ohm.
Let the design frequency be 7 MHz.
Find values for the two capacitors and the inductor in the T-match.

73 de VA2GLU

Gerald

During class, we matched a 250 ohm antenna to a 50 ohm transmission line using:

1. the design equations for an LC network (ARRL Handbook)

2. an analysis based on conjugate matching

3. Smith Chart

The point of doing this 3 ways is to show the consistency in the results.
You don't have to print out any of this info.

However, maybe printing the BLANK SMITH CHART (PDF) could be helpful.


73 de VA2GLU

Gerald

 

Question index pour

"Canadian Amateur Radio Advanced Qualification Study Guide",

2ième édition, Coax Publications Inc, 2019.

Pour le cours radio avancé, svp enregistrer sur zoom et contacter gerald.lemay.va2glu@gmail.com pour plus d'infos. C'est gratuit.

https://zoom.us/

18h30 - 19h00, lundi 6 avril 2020: "Un L-match avec le Smith Chart"

18h30 - 19h00,lundi 20 avril 2020: "Catégorie 3: Mesures"

 

Les prochains cours de radio pour le Certificat Basique et le Certificat Supérieur aura lieu en septembre 2020 au Centre communautaire récréatif Saint-Jean-Baptiste.

Pour plus d'infos, svp contactez Gérald va2glu. gerald.lemay.va2glu@gmail.com

819.474.7768

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