wideband coupler design in ADS

[goldensol]

langer coupler wideband

I want to design a wideband direct coupler with small size from 100MHz-500MHz.Could you give me some advice?

The peak power level over 150W.

 

[flatulent]

wirepack sage

The ususal method for this bandwidth is to use a multiple finger Lange coupler.

 

[jamez]

wideband coupler

Hi,

It is a large size even using a multiple finger Lange coupler,
a bended caxial coupler may be ok.

 

[nandopg]

Wirepack

Dear friend,
I have been using the stuff from Sage Microwave. Take a look on their web site:
**broken link removed**

Good luck

 

[flatulent]

calculator

Here is a calculator for the Sage products.

 

[molloy]

Re: wideband coupler

I want to design a wideband direct coupler with small size from 100MHz-500MHz.Could you give me some advice?

The peak power level over 150W.

For a directional coupler (at least 20dB i think) you could try a short coupler. I mean you could design the DC in a higher band (lets suppose 1GHz) to have lets say a coupling of 5dB and then work in your band where you have a slope in coupling. Then you can compensate the slope with a low pass filter
hoping this can help you :wink:

 

[Sinuous]

I have seen a technique where the printed Lange Coupler is replaced with chips and wire to reduce size at low frequencies. I will see if I can did up the article, but in the mean time maybe you can figure out what the values are by transforming the lines into the equivalent caps and inductors.

 

[g579]

It is quite common to make directional couplers for the TV band freqs (100 - 800 MHz), with a 2 hole ferrite. There are a lot of literature about it. The only real drawback is the limited (max 20 dB) isolation.
g579

 

[Sinuous]

You might want to try Odyseus's RF & Micowave Theory site at
**broken link removed**. He has some designs for couplers with chips and wires.