hmalissa
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Hi everybody,
I'm trying to design a layout where I use a SMA (or similar) end launch connector to couple MW at 10 GHz into a microstrip line. I'm new to designing MW circuits, but I did a bit of reading, and I came across the "End Launch Connector Series" from Southwest Microwave. These seem to be close to what I want. Fortunately Southwest MW gives some details on how to mount these connectors, and they mention that it can be used with microstrip lines "with top ground launch". I'm not 100% sure what the top ground launch means, but I assume I need to add a small patch of ground plane on both sides of the microstrip line and connect them to the bottom ground plane using vias.
My question is: is it possible to use these (or similar) connectors with a microstrip line without having to add vias? I found some information on CPW-microstrip transitions involving quarter wavelength stubs - something like a virtual ground - is this what I need to do? Are there any specific instructions on how to design such a transition - there seem to be lots of similar concepts around, but I couldn't find real design rules about these transitions.
In advance, thanks a lot for your help. I'm a beginner in this field, and I'm sorry if these questions seem stupid to you.
Hans
I'm trying to design a layout where I use a SMA (or similar) end launch connector to couple MW at 10 GHz into a microstrip line. I'm new to designing MW circuits, but I did a bit of reading, and I came across the "End Launch Connector Series" from Southwest Microwave. These seem to be close to what I want. Fortunately Southwest MW gives some details on how to mount these connectors, and they mention that it can be used with microstrip lines "with top ground launch". I'm not 100% sure what the top ground launch means, but I assume I need to add a small patch of ground plane on both sides of the microstrip line and connect them to the bottom ground plane using vias.
My question is: is it possible to use these (or similar) connectors with a microstrip line without having to add vias? I found some information on CPW-microstrip transitions involving quarter wavelength stubs - something like a virtual ground - is this what I need to do? Are there any specific instructions on how to design such a transition - there seem to be lots of similar concepts around, but I couldn't find real design rules about these transitions.
In advance, thanks a lot for your help. I'm a beginner in this field, and I'm sorry if these questions seem stupid to you.
Hans