Hello all, Its Ali here. I am a Electrical (Telecom) Engineering student and my Final Year Project (FYP) is Portable GPR in which I am designing UWB transceiver. Currently I am working on the transmitter part. Here are a few specs of the design: -Simulation Software: NI Multisim 12.0.1 -Its an Impulse Radar with Bandwidth of 1 GHz centered at 500 MHz (currently) -I used the logic of NORing a clock with its inverted delayed version, giving an approximate Gaussian Pulse of duration 1 ns. Clock decides Pulse Repetition Frequency (PRF). Its frequency is set to 100 MHz currently. (Idea from the Paper I am following) -I generated the ref using AD 8009-ARZ, a high speed Op-Amp and generated the inverted version of it using the same op-amp. -I made the NOR gate by generic transistors (FETs). (Please guide about practical transistors I should use) -I haven't designed the pulse amplifier yet (current output voltage) First of all, please comment on the approach I am using i.e., is it okay to generate clock using Op-amps? Is there any other better way? etc. The problem(s) are as follows: -Antenna Design (Vivaldi etc.) on frequency of 0-1 GHz yields an impractical design. I thought of designing an active modulator to ease off the antenna design but have no idea on how to do it. Please help me in this matter. -Choice of transistors for NOR gate. What, in your opinion is the best approach to tackle this project? If anything I wrote above isn't clear, please say so that I can elaborate it/provide visual aid. P.S: Please don't quote number of results of Google by just typing 'frequency multipliers' or anything else like that. I have done my homework on this. Also, the more you elaborate, the more I can understand as I am quite an amateur in this matter. :) Thank you in advance.