Study on Millimeter Wave Mixers.
Abstract
For years waveguide-type mixers were the only ones available at frequencies above 18 GHz. However, more recently design techniques that were previously considered only suitable at microwave frequencies have been extended to millimeterwave frequencies. These developments can be separated into two groups. True balanced mixers in waveguide have been built using packaged diodes combined with coaxial IF circuits. These mixers differ from conventional balanced mixers in that they do not employ a separate hybrid such as a short-slot hybrid or a magic tee. Rather the diodes are arranged in a bridge circuit thus leading to a compact mixer with excellent LO-RF isolation. This type of mixer is capable of covering entire waveguide bands and high IF frequencies. The second development of importance is the emergence of mixers using integrated circuit techniques at millimeter-wave frequencies. These developments have shown that balanced and image reject mixers are feasible using microstrip on sapphire, quartz and Duroid up to and beyond 60 GHz.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1977
- Accession Number
- ADA041525
Entities
People
- Ashok K. Gorwara