Hello sir,
HMC431
Recommended for New Designs
The HMC431LP4(E) is a GaAs InGaP Heterojunction Bipolar Transistor (HBT) MMIC VCO with an integrated resonator, negative resistance device, varactor diode...
Datasheet
HMC431 on Analog.com
Hello sir,
Hi,
The oscillator will in all likely hood continue to function fine albeit at a slightly different Vtune voltage vs frequency than would exist if you didn't have these elements in place. To minimize this effect place a 3 to 6 dB resistive attenuator between the output of the VCO and the series parallel LR circuit to improve the match and reduce the effects of pulling.
Please visit microwaves 101 and search transmission line impedance if you're unsure of how to derive impedance or search for system return loss and uncertainty for more information on how the return loss of cascaded elements impacts the return loss at various nodes throughout a design.
Best Regards,
Marty
Sir, thank you very much for your reply.
Sir, thank you very much for your reply.