Operational Features of a Millimeter-Wave Balanced Mixer with a Broadband Intermediate-Frequency Output

Abstract

We consider operational and structural features of a millimeter-wave balanced mixer with a broadband intermediate-frequency (IF) output. In this case, the heterodyne frequency is in the close vicinity of the IF band. The problem is reduced to an increase in isolation in the heterodyne-IF circuit along with the decrease in the mixer conversion loss in the broad IF band. As a result, we realized the mixer design with the following parameters: mixer input band 26-40 GHz, IF output band 0-18 GHz, conversion loss 6-8 dB, and heterodyne-IF isolation is 10-20 dB. The mixer circuit based on a combination of waveguide-slotted, coplanar, and microstrip transmission lines is studied.