How to design a switch of 0.3GHZ~1Ghz?

[microwaveboy]

how to design a switch

I want to design a switch of 0.3GHz~1GHz,power handle is 8w(average).
who can tell me the schmatic?

 

[E-design]

Re: how to design a switch

It can be done with pin-diodes or I see that OMRON advertise miniature RF relays for use in cellular applications that is SM that might work. Search the OMRON site.

 

[flatulent]

Re: how to design a switch

The relay method is the lowest power way if you use magnetic latching relays.

 

[adanshen]

how to design a switch

what about the voltage you want to switch and the supply voltage

 

[wontall]

Re: how to design a switch

i really agree with adanshen, it depents on what the voltage you want to switch and the frequency you need,
you can do it in Digtal way or Analog way.

 

[vfone]

Re: how to design a switch

A few examples for RF switch design:

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www.eecg.toronto.edu/~kphang/papers/2001/koo_rftx.doc

regards

 

[yafayez]

Re: how to design a switch

https://www.pedasoft.com

Here is a link of how to design a switch using a tool called EM-Supreme:

**broken link removed**

 

[jiripolivka]

Dear Microwaveboy:

As you need to transmit 8W of power, the only reasonable way is to use a coaxial electromechanical switch. You could find PIN-diode switches but for such low frequency and power combination, I am not sure if you can get one.

Recently I tested samples of reed RF relays by Meder. Their SRF05-1A is specified only to 0.16W RF but allows to operate well above 1 GHz. Try to contact the company, they may have a higher-power model for you.

I used OMRON RF relays and can recommend their products. 8W of RF power will be again out of their specification but as they are low-cost, you can try if they survive.

For another low-cost solution, radio amateurs use simple mechanical or relay switch contacts built in a short coaxial line. They are usually matched for a narrow-band operation, so you would have to try to make one and see if you succeed.