dc-35 MHz 50Ohm-4000 Ohm Transformer
dc-35 MHz 50Ohm-4000 Ohm Transformer
(OP)
Hi,
I need help to design a tranformer to match my 50 Ohm output from a I-Q mixer to a load impedance of 4,000 Ohm.
The conversion loss from my mixer is about 10.0 dB max (50 Ohm). Rf power is 0 dBm. LO is about +10 dBm.
From my calculation the voltage output at I & Q output is about 70 mV (or 14mA, which translate into 5.6V into 4KOhm). Use quaterwave transformer (N=1) I need a 31" long on alumina (or 98" in air) with the impedance of 447 Ohm.
This is not working in my design since the space is very limited. I have only about .250 X .250 X .075 to work with.
Any idea how to redhce the size of the transformer?
Thanks, Krytar
I need help to design a tranformer to match my 50 Ohm output from a I-Q mixer to a load impedance of 4,000 Ohm.
The conversion loss from my mixer is about 10.0 dB max (50 Ohm). Rf power is 0 dBm. LO is about +10 dBm.
From my calculation the voltage output at I & Q output is about 70 mV (or 14mA, which translate into 5.6V into 4KOhm). Use quaterwave transformer (N=1) I need a 31" long on alumina (or 98" in air) with the impedance of 447 Ohm.
This is not working in my design since the space is very limited. I have only about .250 X .250 X .075 to work with.
Any idea how to redhce the size of the transformer?
Thanks, Krytar
RE: dc-35 MHz 50Ohm-4000 Ohm Transformer
RE: dc-35 MHz 50Ohm-4000 Ohm Transformer
I don't have DC power out or in.
The I-Q mixer is a combination of a power divider & a quadrature 90 degree hybrid & two mixers (all are lumped elements)
Thanks, krytar
RE: dc-35 MHz 50Ohm-4000 Ohm Transformer
RE: dc-35 MHz 50Ohm-4000 Ohm Transformer
RE: dc-35 MHz 50Ohm-4000 Ohm Transformer
I would be more than happy to take 4-35MHz transformer.
Thanks, Krytar
RE: dc-35 MHz 50Ohm-4000 Ohm Transformer
RE: dc-35 MHz 50Ohm-4000 Ohm Transformer