Design of the Three-Channel Microwave Sampler

This paper presents a three-channel microwave sampler circuit structure, comprising a pulse generation circuit, a resistive power divider, and three sampling circuits. By incorporating a differential slotline structure into the circuit, The issue of transmitting a broadband differential pulse signal divided into three paths has been ingeniously resolved. Experimental results demonstrate that when the intermediate frequency (IF) signal frequency is below 10 MHz, the frequency conversion loss for each channel is -30 dB at low frequencies and less than -60 dB at 18-21 GHz, with a dynamic range of $70 \mathrm{~dB} \text{@} 10 \mathrm{~Hz}$ IF bandwidth.