Integrated circuit planar high frequency mixer

High frequency signal mixer means including:

• substrate means,
• conductive layer means disposed on said substrate means and having a substantially closed pattern of at least first, second, and third clear areas,
• said first clear area having probe means for coupling electromagnetic energy of a first frequency propagating perpendicular to said first clear area for propagation, in turn, along balanced transmission line means into said second clear area,
• said second clear area being divided symmetrically by said balanced transmission line means, and
• said second clear area further including opposed conductive truncated taper means disposed symmetrically about said balanced transmission line means,
• first and second diode means respectively coupled from the apex of one of said opposed conductive truncated taper means to said balanced transmission line means and from the latter to the apex of a second of said opposed conductive truncated taper means for interaction with said energy propagating along said balanced transmission line means,
• said second clear area being disposed as to enable said diodes to be immersed in electromagnetic energy of a second frequency propagating perpendicular to said second clear area for additional interaction with said first and second diode means, and
• planar filter means disposed in said third clear area and coupled to said balanced transmission line means for allowing extraction of electromagnetic energy having a difference frequency with respect to said first and second frequencies.