Abstract :
The ultimate size of many microwave components such as beam-forming networks, switching trees, amplifiers, mixers, comb filters, etc., is related to the size of a 90/spl deg/ coupler. The cross-section of a coupler can be reduced by means of todays integrated circuit technology. This paper presents a method of reducing the length of a coupler over and above length reductions possible by means of the utilization of a high dielectric constant medium.
