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Two small sections impedance transformer

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raed_microwave

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Hi
I wana to use two sections impedance transformer in 2 way wilkinson power divider instead of quarter wave transformer
the matching technique consists of two sections impedance and each section has max. 30 degree length and the details about this technique has already attached as PDF file ( see The Shortened Quarter-Wavelength Transformer in page 30).
the problem is , if I design a matching network by using these two sections transformer , it is working and the impedance is matched, but if I add these two sections impedance to wilkinson power divider instead of quarter wave transformer, unfortunately it is not working and the output ports of wilkinson power divider are not matched. please I need help to solve this problem.
 

This does not work as the transformers are less than 90° (for the 50 to 100 ohm transformer, Rhea uses a cascade of 50 and 100 ohm lines, each is 28.13° long for a total length of 56.25°).

Instead, use any of the "Compact Wilkinson" designs described in the link below. The "Webb splitter" may be of interest, where a capacitor is used together with transformers of 22.5° length.

**broken link removed**
 
VSWR said:
This does not work as the transformers are less than 90° (for the 50 to 100 ohm transformer, Rhea uses a cascade of 50 and 100 ohm lines, each is 28.13° long for a total length of 56.25°).

Instead, use any of the "Compact Wilkinson" designs described in the link below. The "Webb splitter" may be of interest, where a capacitor is used together with transformers of 22.5° length.

**broken link removed**
Click to expand...


Thanx VSWR for your help and this type of Power Divider is very interesting for me but I wana to ask if u have more info. or papers about this Power divider "Webb splitter" bcz I need to understand the function of capacitor in this Power divider and its calculations.
 

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