What is the best scheme for 10GHz x10 multiplication?
时间：04-06
整理：3721RD
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Hello!
For 1.25GHz obtaining 10GHz x8 multiplication is easy using 3 FET doublers (1.25GHz x2 x2 x2 = 10GHz) or 2 FET doublers + diode doubler
But for 1GHz x 10 = 10GHz multiplication doubler can be used only one time. I used x5x2 scheme, but have poor results and big power consumption (2xERA3 for x5 multiplication, 2xCEL 10GHz FET for x2 multiplication and amplification).
Input is 0dBm - > ERA3 standard biasing -> ERA3 saturated -> microstrip bandpass -> CEL FET doubler -> CEL FET amp -> far below 0dBm! Just weak signal above noise on receiver, so i guess it is -60dBm or so. Total waste of 4 active devices. Still searching problem in my design.
Recently i found info about http://www.mm-wave.demon.co.uk/47gsrc.htm (frequency marker using LNB schottky diode).
Author says:
Yes, it makes me wonder. And similar constructions: http://www.g3pho.free-online.co.uk/m...es/marker.html
for 10GHz: http://www.qsl.net/iw1fyv/marker_en.html
So i am wondering can i do x10 using less active devices/stages?
For example: 0dBm input -> ERA3SM near saturation -> diode (x10) -> band-passfilter -> FET amplifier -> Can i get 0dBm of that?
I can try, but very tired and disappointed constructing x5x2 multiplier.
For 1.25GHz obtaining 10GHz x8 multiplication is easy using 3 FET doublers (1.25GHz x2 x2 x2 = 10GHz) or 2 FET doublers + diode doubler
But for 1GHz x 10 = 10GHz multiplication doubler can be used only one time. I used x5x2 scheme, but have poor results and big power consumption (2xERA3 for x5 multiplication, 2xCEL 10GHz FET for x2 multiplication and amplification).
Input is 0dBm - > ERA3 standard biasing -> ERA3 saturated -> microstrip bandpass -> CEL FET doubler -> CEL FET amp -> far below 0dBm! Just weak signal above noise on receiver, so i guess it is -60dBm or so. Total waste of 4 active devices. Still searching problem in my design.
Recently i found info about http://www.mm-wave.demon.co.uk/47gsrc.htm (frequency marker using LNB schottky diode).
Author says:
Yes, it makes me wonder. And similar constructions: http://www.g3pho.free-online.co.uk/m...es/marker.html
for 10GHz: http://www.qsl.net/iw1fyv/marker_en.html
So i am wondering can i do x10 using less active devices/stages?
For example: 0dBm input -> ERA3SM near saturation -> diode (x10) -> band-passfilter -> FET amplifier -> Can i get 0dBm of that?
I can try, but very tired and disappointed constructing x5x2 multiplier.
If it were me, I would either do a PLL, or use a Hittite X8 HMC444LP4
Hope the following Link helps.
http://www.aeroflex.com/ams/metelics/pdfiles/AN_SRD.pdf