How to connect DC Bias Circuit to Varactor Diode..??

[arielpeter]

i have problem dealing with DC bias tht connected to varactor diode..
hope can get the proper connection between the varactor and DC biasing cct(connect to ground and etc.)

 

[Takeshi-san]

There is no problem at all.
You need varactor diode, 2 capacitors say 10nF and resistor 100-200kOm
Anode of varactor going to GND
Cathode of varactor going to DC bias via resistor, DC biasing "shortcut to ground" via capacitor
Cathode of varactor going to your coil tank via 2nd capacitor
That's all

 

[arielpeter]

thanks Takeshi-san.. very good info..i faced prob when realize it onto microstrip especially when putting power supply..seems like the responses remain unchanged and no effect at all when applying voltages at certain ranges(0-10V)..hope can get the information regarding proper connection btw power supply to the cct on the microstrip..highly appreciate if can get the proper connection thru' diagram and figure..thanks u...

 

[johnnykhor]

There is no problem at all.
You need varactor diode, 2 capacitors say 10nF and resistor 100-200kOm
Anode of varactor going to GND
Cathode of varactor going to DC bias via resistor, DC biasing "shortcut to ground" via capacitor
Cathode of varactor going to your coil tank via 2nd capacitor
That's all

hi there,
is it possible to attach a figure for better illustration?