A New Uniplanar Coplanar Waveguide/ Slotline Balanced Mixer

Abstract

This paper presents a new uniplanar microwave mixer circuit. The mixer utilizes even and odd modes on a coplanar waveguide to create a singly balanced mixer. The RF signal is fed quasi-optically as an even mode on a coplanar waveguide through a slot antenna while the local oscillator signal is fed to the same coplanar waveguide as an odd mode through an even-mode to odd-mode converter. The resulting mixer circuit is simple, compact, efficient, and can be scaled easily to millimeter wave frequencies.