5G service will be gradually expanded to cover the whole country India over the next two years. The viability of 5GHz wireless systems depends primarily on the linearity of the RF downconverter. With the increasing number of portable battery-operated wireless devices, the challenge exit to achieve excellent linearity and high conversion gain. This work tries to overcome the difficulty by proposing a Current-Reuse Double-Balanced RF mixer. The K-band, 23 to 25 GHz, has been chosen for the construction of the mixer. With a conversion gain of 24.2 dB in this RF bandwidth range, the suggested mixer's design also achieves a better degree of linearity with -17.8 dBm 1-dB compression at 24 GHz. The input strength of the LO feed was maintained at a tolerable level of -3 dBm.